/* ============================================
   ROOT & RESET
   ============================================ */
:root {
    --bg-deep: #0b1118;
    --bg-surface: #111b27;
    --bg-card: #182230;
    --bg-card-hover: #1f2f42;
    --accent-warm: #66c0f4;
    --accent-teal: #f4a261;
    --accent-coral: #d87c6a;
    --accent-gradient: linear-gradient(145deg, #66c0f4, #f4a261);
    --accent-glow: rgba(102, 192, 244, 0.15);
    --text-primary: #f4f4f4;
    --text-secondary: #c5cdd5;
    --text-muted: #7b8694;
    --border-subtle: #223044;
    --border-glow: #3a4c62;
    --shadow-card: 0 12px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(102, 192, 244, 0.08);
    --font-display: 'Instrument Serif', 'Georgia', serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --space-1: 4px;  --space-2: 8px;  --space-3: 12px;  --space-4: 16px;
    --space-5: 20px; --space-6: 24px; --space-7: 32px;  --space-8: 40px;
    --space-9: 48px; --space-10: 56px; --space-11: 72px; --space-12: 96px;
    --space-13: 120px;
    --radius-sm: 6px; --radius-md: 12px; --radius-lg: 20px; --radius-xl: 32px; --radius-full: 9999px;
    --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-premium: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --duration-fast: 180ms;
    --duration-smooth: 450ms;
    --duration-reveal: 700ms;
    --z-nav: 1000;
    --z-modal: 1100;
    --z-toast: 1200;
    --z-music: 2000;
    --section-y: clamp(72px, 10vh, 120px);
    --section-x: clamp(20px, 5vw, 36px);
    --light-size: 480px;
}

.day-theme {
    --bg-deep: #0d1620;
    --bg-surface: #142130;
    --bg-card: #1b2a3c;
    --bg-card-hover: #22354c;
    --border-subtle: #2d415b;
    --accent-glow: rgba(102, 192, 244, 0.22);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    scrollbar-color: var(--border-glow) var(--bg-deep);
}
body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 1s ease;
}
::selection {
    background: rgba(102, 192, 244, 0.25);
    color: #fff;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .hero__scroll-dot,
    .music-player.playing .visualizer-bar {
        animation: none !important;
    }
    .reveal,
    [data-reveal],
    .chapter-item .chapter-title,
    .project-card .project-card__title,
    .hero__name span,
    .hero__subtitle span,
    .hero__tagline span,
    .hero__invite span,
    .hero__cta-group span {
        opacity: 1 !important;
        transform: none !important;
        clip-path: none !important;
    }
    #mouse-light {
        display: none !important;
    }
}

::-webkit-scrollbar {
    width: 5px;
}
::-webkit-scrollbar-track {
    background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
    background: var(--border-glow);
    border-radius: 3px;
}
*:focus-visible {
    outline: 3px solid var(--accent-warm);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

.skip-link {
    position: fixed;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-warm);
    color: #0b1118;
    padding: var(--space-3) var(--space-6);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    z-index: 9999;
    font-weight: 600;
    font-size: .9rem;
    text-decoration: none;
    transition: top var(--duration-smooth) var(--ease-out);
    font-family: var(--font-mono);
    letter-spacing: .04em;
}
.skip-link:focus-visible {
    top: 0;
}

/* ============================================
   CINEMATIC OVERLAYS & SCROLL PROGRESS
   ============================================ */
.cinematic-vignette {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.28) 100%);
}
.film-grain {
    position: fixed;
    inset: -50%;
    z-index: 2;
    pointer-events: none;
    opacity: .035;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 180px 180px;
}
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    z-index: 1001;
    background: var(--accent-gradient);
    box-shadow: 0 0 12px rgba(102, 192, 244, 0.35);
    transition: width .08s linear;
    pointer-events: none;
}

.shutter-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: #fff;
    pointer-events: none;
    opacity: 0;
}
.shutter-overlay.active {
    animation: shutterFlash 0.2s var(--ease-out) forwards;
}
@keyframes shutterFlash {
    0% { opacity: 0.8; background: #ffffff; }
    40% { opacity: 0.3; background: #000000; }
    100% { opacity: 0; }
}

/* ============================================
   LIGHTING & ORBS (tối ưu)
   ============================================ */
#mouse-light {
    position: fixed;
    pointer-events: none;
    z-index: 9997;
    width: var(--light-size);
    height: var(--light-size);
    border-radius: 50%;
    background: radial-gradient(circle at center, rgba(102, 192, 244, .10) 0%, rgba(244, 162, 97, .05) 35%, rgba(102, 192, 244, .02) 55%, transparent 72%);
    /* KHÔNG dùng transform ở đây – JS sẽ điều khiển */
    will-change: transform;
    mix-blend-mode: screen;
    transition: opacity .6s ease;
}
@media (pointer: coarse) {
    #mouse-light {
        display: none !important;
    }
}

.parallax-orb {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
    filter: blur(40px);
    opacity: 0.08;
    transition: opacity 1.2s ease;
}
.parallax-orb.orb-1 {
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(102, 192, 244, .5) 0%, transparent 70%);
    top: -12%;
    left: -10%;
}
.parallax-orb.orb-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(244, 162, 97, .4) 0%, transparent 70%);
    top: 45%;
    right: -8%;
}
.parallax-orb.orb-3 {
    width: 340px;
    height: 340px;
    background: radial-gradient(circle, rgba(102, 192, 244, .4) 0%, transparent 70%);
    bottom: -10%;
    left: 15%;
}

.bg-lighting {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: radial-gradient(ellipse at 25% 20%, rgba(102, 192, 244, .06), transparent 55%);
    transition: background 1.2s ease, opacity 1.2s ease;
    opacity: 0.4;
}
.bg-lighting.scrolled {
    background: radial-gradient(ellipse at 46% 8%, rgba(212, 163, 115, 0.11), transparent 58%);
    opacity: 0.75;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-7);
    background: rgba(11, 17, 24, .70);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid transparent;
    transition: background var(--duration-smooth), border-color var(--duration-smooth), box-shadow var(--duration-smooth);
}
.nav.scrolled {
    background: rgba(11, 17, 24, .92);
    border-bottom-color: var(--border-subtle);
    box-shadow: 0 4px 30px rgba(0, 0, 0, .4);
}
.nav__logo {
    font-family: var(--font-display);
    font-size: 2rem;
    letter-spacing: .06em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    transition: opacity var(--duration-fast), transform var(--duration-fast) var(--ease-out);
    line-height: 1;
    position: relative;
}
.nav__logo:hover {
    opacity: .75;
    transform: scale(1.02);
}
.nav__logo span {
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .15em;
    -webkit-text-fill-color: var(--text-muted);
    background: none;
    margin-left: var(--space-2);
}

.nav__links {
    display: flex;
    list-style: none;
    gap: var(--space-6);
    align-items: center;
}
.nav__links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: .78rem;
    font-weight: 500;
    letter-spacing: .12em;
    text-transform: uppercase;
    transition: color var(--duration-fast);
    position: relative;
    padding: var(--space-1) 0;
}
.nav__links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width var(--duration-smooth) var(--ease-out);
}
.nav__links a:hover,
.nav__links a.active {
    color: #fff;
}
.nav__links a:hover::after,
.nav__links a.active::after {
    width: 100%;
}
.nav__links a.active {
    font-weight: 600;
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2);
    flex-direction: column;
    gap: 5px;
    z-index: 1100;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast);
}
.nav__toggle:hover {
    background: rgba(255, 255, 255, .04);
}
.nav__toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--duration-fast) var(--ease-out);
}
.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.lang-custom {
    position: relative;
    margin-left: var(--space-6);
    display: flex;
    align-items: center;
}
.lang-select {
    appearance: none;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: var(--space-2) var(--space-7) var(--space-2) var(--space-3);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: .75rem;
    letter-spacing: .05em;
    cursor: pointer;
    transition: border-color var(--duration-fast), color var(--duration-fast), background var(--duration-fast), box-shadow var(--duration-fast);
    min-width: 82px;
    outline: none;
    font-weight: 500;
}
.lang-select:hover,
.lang-select:focus-visible {
    border-color: var(--accent-warm);
    color: #fff;
    background: var(--bg-card-hover);
    box-shadow: 0 0 0 3px rgba(102, 192, 244, .12);
}
.lang-custom::after {
    content: '';
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 6px;
    height: 6px;
    border-bottom: 2px solid var(--text-secondary);
    border-right: 2px solid var(--text-secondary);
    pointer-events: none;
    transition: border-color var(--duration-fast);
}
.lang-custom:focus-within::after {
    border-color: var(--accent-warm);
}
.nav__close {
    display: none;
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: rgba(255, 255, 255, .06);
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
    font-family: var(--font-body);
    line-height: 1;
}
.nav__close:hover {
    color: #fff;
    background: rgba(255, 255, 255, .12);
}

@media (max-width: 820px) {
    .nav {
        padding: var(--space-3) var(--space-4);
    }
    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        flex-direction: column;
        background: rgba(17, 27, 39, .97);
        backdrop-filter: blur(28px);
        -webkit-backdrop-filter: blur(28px);
        padding: 100px var(--space-7) var(--space-8);
        gap: var(--space-4);
        transition: right var(--duration-smooth) var(--ease-out);
        border-left: 1px solid var(--border-subtle);
        z-index: 1050;
        align-items: flex-start;
        box-shadow: -8px 0 40px rgba(0, 0, 0, .5);
    }
    .nav__links.open {
        right: 0;
    }
    .nav__toggle {
        display: flex;
    }
    .lang-custom {
        margin-left: var(--space-3);
        margin-right: var(--space-2);
    }
    .lang-select {
        min-width: 70px;
        padding: var(--space-1) var(--space-6) var(--space-1) var(--space-3);
        font-size: .7rem;
    }
    .nav__close {
        display: flex !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   SECTION BASE
   ============================================ */
.section {
    position: relative;
    z-index: 10;
    padding: var(--section-y) var(--section-x);
    max-width: 1120px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(32px);
    transition: opacity var(--duration-reveal) var(--ease-out), transform var(--duration-reveal) var(--ease-out);
    content-visibility: auto;
    contain-intrinsic-size: 480px;
    scroll-margin-top: 80px;
}
.section.revealed {
    opacity: 1;
    transform: translateY(0);
}
.section__header {
    margin-bottom: var(--space-10);
    position: relative;
}
.section__label {
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .25em;
    color: var(--accent-warm);
    text-transform: uppercase;
    margin-bottom: var(--space-2);
    font-weight: 600;
    opacity: .8;
}
.section__title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 5.5vw, 4rem);
    font-weight: 400;
    letter-spacing: -.01em;
    color: #fff;
    line-height: 1.1;
}
.section__title .highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-style: italic;
}
.section__divider {
    width: 64px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px;
    margin-top: var(--space-4);
    box-shadow: 0 0 20px rgba(102, 192, 244, .15);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px var(--section-x) 80px;
    overflow: hidden;
}
.hero__canvas {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    pointer-events: none !important;
    z-index: 0 !important;
}
.hero__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-11);
    width: 100%;
    position: relative;
    z-index: 2;
}
@media (max-width: 820px) {
    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-8);
    }
    .hero {
        padding: 100px var(--space-4) 60px;
    }
    .hero__text,
    .hero__invite {
        max-width: 100%;
        margin: 0 auto;
    }
    .hero__cta-group {
        justify-content: center;
    }
}
.hero__text {
    max-width: 520px;
}
.hero__name {
    font-family: var(--font-display);
    font-size: clamp(5rem, 14vw, 9rem);
    font-weight: 400;
    line-height: .92;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-3);
    letter-spacing: -.02em;
    text-shadow: 0 0 60px rgba(102, 192, 244, .08);
}
.hero__name span {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px) scale(.96);
    animation: heroWordIn .8s var(--ease-out) forwards;
}
.hero__name span:nth-child(1) { animation-delay: .05s; }
.hero__name span:nth-child(2) { animation-delay: .12s; }
.hero__name span:nth-child(3) { animation-delay: .19s; }
.hero__name span:nth-child(4) { animation-delay: .26s; }
@keyframes heroWordIn {
    from { opacity: 0; transform: translateY(30px) scale(.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.hero__subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--accent-teal);
    letter-spacing: .15em;
    margin-bottom: var(--space-4);
    font-family: var(--font-mono);
    text-transform: uppercase;
}
.hero__subtitle span {
    display: inline-block;
    opacity: 0;
    transform: translateY(16px);
    animation: heroWordIn .6s var(--ease-out) forwards;
}
.hero__subtitle span:nth-child(1) { animation-delay: .35s; }
.hero__subtitle span:nth-child(2) { animation-delay: .42s; }
.hero__subtitle span:nth-child(3) { animation-delay: .49s; }
.hero__subtitle span:nth-child(4) { animation-delay: .56s; }
.hero__subtitle span:nth-child(5) { animation-delay: .63s; }

.hero__tagline {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: .02em;
    margin-bottom: var(--space-3);
    line-height: 1.6;
}
.hero__tagline span,
.hero__invite span,
.hero__cta-group span {
    display: inline-block;
    opacity: 0;
    transform: translateY(12px);
    animation: heroWordIn .5s var(--ease-out) forwards;
}
.hero__invite {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: var(--space-6);
    line-height: 1.8;
    font-style: italic;
    max-width: 440px;
}
.hero__cta-group {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}
.hero__cta-group span:nth-child(1) { animation-delay: 2.20s; }
.hero__cta-group span:nth-child(2) { animation-delay: 2.27s; }

.hero__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-7);
    background: var(--accent-gradient);
    color: #0b1118;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: .85rem;
    letter-spacing: .08em;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--duration-smooth) var(--ease-out);
    box-shadow: 0 0 20px rgba(244, 162, 97, .2);
    font-weight: 600;
    position: relative;
    overflow: hidden;
}
.hero__cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, rgba(255, 255, 255, .2), transparent);
    opacity: 0;
    transition: opacity var(--duration-smooth);
}
.hero__cta:hover::before { opacity: 1; }
.hero__cta:hover {
    box-shadow: 0 0 40px rgba(244, 162, 97, .35), 0 8px 24px rgba(244, 162, 97, .15);
    transform: scale(1.04) translateY(-2px);
}
.hero__cta:active {
    transform: scale(.97);
    transition-duration: .08s;
}

.hero__cta--secondary {
    background: transparent;
    color: var(--text-secondary);
    box-shadow: none;
    border: 1px solid var(--border-subtle);
}
.hero__cta--secondary::before { display: none; }
.hero__cta--secondary:hover {
    border-color: var(--accent-warm);
    color: #fff;
    box-shadow: 0 0 30px rgba(102, 192, 244, .08);
    transform: scale(1.04) translateY(-2px);
}
.hero__cta--secondary:active { transform: scale(.97); }

.hero__portrait {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 3/4;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, .6), 0 0 0 1px rgba(255, 255, 255, .04);
    background: #182230;
    position: relative;
    transition: transform .4s var(--ease-out), box-shadow .5s var(--ease-out);
    opacity: 0;
    transform: scale(.96) translateY(20px);
    animation: heroPortraitIn .9s var(--ease-out) .3s forwards;
    will-change: transform, opacity;
}
.hero__portrait:hover {
    box-shadow: 0 24px 72px rgba(0, 0, 0, .7), 0 0 0 1px rgba(102, 192, 244, .1);
}
@keyframes heroPortraitIn {
    from { opacity: 0; transform: scale(.96) translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero__portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(.90) contrast(1.08) saturate(.95);
    display: block;
    transition: transform .6s var(--ease-out);
}
.hero__portrait:hover img { transform: scale(1.03); }
.hero__portrait-caption {
    position: absolute;
    bottom: var(--space-4);
    left: var(--space-4);
    font-size: .7rem;
    color: rgba(255, 255, 255, .5);
    letter-spacing: .08em;
    background: rgba(0, 0, 0, .35);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(8px);
    font-family: var(--font-mono);
    border: 1px solid rgba(255, 255, 255, .04);
}
.hero__portrait-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    font-family: var(--font-mono);
    font-size: .6rem;
    letter-spacing: .12em;
    color: #fff;
    background: rgba(0, 0, 0, .4);
    backdrop-filter: blur(8px);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, .08);
}

.hero__scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--accent-teal);
    font-size: .65rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    font-family: var(--font-mono);
    opacity: 0;
    z-index: 2;
    animation: heroFadeIn 1s var(--ease-out) 2.4s forwards;
}
@keyframes heroFadeIn {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to { opacity: .5; transform: translateX(-50%) translateY(0); }
}
.hero__scroll-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-gradient);
    animation: scrollPulse 4.2s ease-in-out infinite;
    box-shadow: 0 0 12px rgba(102, 192, 244, .2);
}
.hero__scroll-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, var(--accent-warm), transparent);
    opacity: .5;
}
@keyframes scrollPulse {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(14px); opacity: .2; }
}

/* ============================================
   PROFILE
   ============================================ */
.profile__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-11);
    align-items: start;
}
@media (max-width: 820px) {
    .profile__grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}
.profile__quote {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--accent-teal);
    line-height: 1.5;
    margin-bottom: var(--space-5);
    border-left: 3px solid var(--accent-gradient);
    padding-left: var(--space-5);
}
.profile__info p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: var(--space-4);
}
.profile__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}
.profile__stat--wide {
    grid-column: span 2;
}
@media (max-width: 480px) {
    .profile__stats {
        grid-template-columns: 1fr;
    }
    .profile__stat--wide {
        grid-column: span 1;
    }
}
@media (min-width: 481px) and (max-width: 820px) {
    .profile__stats {
        grid-template-columns: 1fr 1fr;
    }
    .profile__stat--wide {
        grid-column: span 2;
    }
}
.profile__stat {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    border: 1px solid var(--border-subtle);
    transition: all var(--duration-smooth) var(--ease-out);
    display: flex;
    gap: var(--space-3);
    align-items: center;
    min-width: 0;
    cursor: default;
}
.profile__stat:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-warm);
    box-shadow: 0 4px 20px rgba(102, 192, 244, .06);
    transform: translateY(-3px);
}
.profile__stat-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    opacity: .7;
    color: var(--accent-warm);
}
.profile__stat-label {
    font-family: var(--font-mono);
    font-size: .65rem;
    letter-spacing: .08em;
    color: var(--text-secondary);
    text-transform: uppercase;
    white-space: nowrap;
}
.profile__stat-sep {
    color: var(--text-muted);
    margin: 0 var(--space-1);
    font-family: var(--font-mono);
    font-size: .7rem;
}
.profile__stat-value {
    font-size: .95rem;
    font-weight: 500;
    color: #fff;
    word-break: break-word;
}
.profile__stat>div:last-child {
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0 var(--space-1);
}
@media (max-width: 480px) {
    .profile__stat { padding: var(--space-3); }
    .profile__stat-value { font-size: .9rem; }
}

/* ============================================
   CHAPTERS & BOKEH FOCUS (tối ưu)
   ============================================ */
.chapters {
    position: relative;
    padding-left: var(--space-9);
    perspective: 1200px;
}
@media (max-width: 600px) {
    .chapters { padding-left: var(--space-7); }
}
.chapters__theme {
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--accent-teal);
    letter-spacing: .1em;
    margin-bottom: var(--space-8);
    text-transform: uppercase;
    opacity: .8;
}
.chapter-item {
    position: relative;
    margin-bottom: var(--space-10);
    padding-left: var(--space-5);
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .6s ease, transform .6s var(--ease-out), filter .6s var(--ease-out);
}
.chapter-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

.chapters:hover .chapter-item:not(:hover) {
    filter: grayscale(30%);
    opacity: 0.45;
}
.chapter-item:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.02) translateX(8px);
}

.chapter-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-9) + 4px);
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-gradient);
    box-shadow: 0 0 20px rgba(102, 192, 244, .25);
    border: 2px solid var(--bg-deep);
    z-index: 2;
    transition: transform var(--duration-fast) var(--ease-out), box-shadow .6s ease;
}
@media (max-width: 600px) {
    .chapter-item::before {
        left: calc(-1 * var(--space-7) + 2px);
        width: 12px;
        height: 12px;
    }
}
.chapter-item.revealed::before {
    box-shadow: 0 0 28px 8px rgba(102, 192, 244, .4), 0 0 56px 20px rgba(102, 192, 244, .12);
}
.chapter-item:hover::before { transform: scale(1.3); }
.chapter-item--climax::before {
    width: 18px;
    height: 18px;
    left: calc(-1 * var(--space-9) + 1px);
    background: var(--accent-gradient);
    box-shadow: 0 0 40px 14px rgba(102, 192, 244, .5);
}
@media (max-width: 600px) {
    .chapter-item--climax::before {
        left: calc(-1 * var(--space-7) - 1px);
        width: 16px;
        height: 16px;
    }
}
.chapter-item--climax::after {
    content: '';
    position: absolute;
    top: -10%;
    left: calc(-1 * var(--space-9));
    width: 180px;
    height: 120%;
    background: radial-gradient(circle at left center, rgba(244, 162, 97, .10), transparent 70%);
    pointer-events: none;
    filter: blur(20px);
}
@media (max-width: 600px) {
    .chapter-item--climax::after {
        left: calc(-1 * var(--space-7));
        width: 120px;
    }
}
.chapter-number {
    font-family: var(--font-mono);
    font-size: .7rem;
    letter-spacing: .25em;
    color: var(--accent-warm);
    text-transform: uppercase;
    margin-bottom: var(--space-1);
    font-weight: 600;
    opacity: .8;
}
.chapter-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    color: #fff;
    margin-bottom: var(--space-2);
    display: inline-block;
    clip-path: inset(0 100% 0 0);
    transition: clip-path .8s var(--ease-out);
    line-height: 1.2;
}
.chapter-item.revealed .chapter-title { clip-path: inset(0 0 0 0); }
.chapter-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity .6s .25s var(--ease-out), transform .6s .25s var(--ease-out);
}
.chapter-item.revealed .chapter-desc {
    opacity: 1;
    transform: translateY(0);
}
.chapters__svg {
    position: absolute;
    left: calc(-1 * var(--space-9) + 11px);
    top: 0;
    width: 2px;
    height: 100%;
    z-index: 0;
}
@media (max-width: 600px) {
    .chapters__svg { left: calc(-1 * var(--space-7) + 9px); }
}
.chapters__path {
    fill: none;
    stroke: var(--accent-warm);
    stroke-width: 2;
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset .1s linear;
    opacity: .3;
}

/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio__intro {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    max-width: 600px;
    line-height: 1.8;
}
.portfolio__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
    contain: layout;
}
@media (max-width: 720px) {
    .portfolio__grid { grid-template-columns: 1fr; }
}
.project-card {
    position: relative;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: var(--space-6) var(--space-6) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    text-decoration: none;
    color: inherit;
    outline: none;
    font-family: inherit;
    font-size: inherit;
    width: 100%;
    transition: all .5s var(--ease-out);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    overflow: hidden;
}
.project-card.revealed {
    opacity: 1;
    transform: translateY(0);
}
.project-card:nth-child(1) { transition-delay: .02s; }
.project-card:nth-child(2) { transition-delay: .08s; }
.project-card:nth-child(3) { transition-delay: .14s; }
.project-card:nth-child(4) { transition-delay: .20s; }

.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 60%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 192, 244, 0.12), transparent);
    transform: skewX(-25deg);
    transition: left 0.75s ease;
    pointer-events: none;
}
.project-card:hover::before {
    left: 150%;
}

.project-card:hover,
.project-card:focus-visible {
    border-color: var(--accent-warm);
    box-shadow: 0 8px 40px rgba(102, 192, 244, .08), 0 0 0 1px rgba(102, 192, 244, .04);
    background: var(--bg-card-hover);
}
.project-card__stamp {
    font-family: var(--font-mono);
    font-size: .6rem;
    letter-spacing: .18em;
    color: var(--accent-warm);
    border: 1px solid var(--accent-warm);
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    align-self: flex-start;
    background: rgba(102, 192, 244, .06);
}
.project-card__title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 400;
    color: #fff;
    display: inline-block;
    clip-path: inset(0 100% 0 0);
    transition: clip-path .7s var(--ease-out);
    line-height: 1.2;
}
.project-card.revealed .project-card__title { clip-path: inset(0 0 0 0); }
.project-card__summary {
    font-size: .95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.project-card__full {
    font-size: .95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    display: none;
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-subtle);
}
.project-card.expanded .project-card__full {
    display: block;
    animation: expandFade .4s var(--ease-out);
}
@keyframes expandFade {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.project-card__tags {
    display: flex;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}
.project-card__status {
    font-family: var(--font-mono);
    font-size: .65rem;
    letter-spacing: .1em;
    color: var(--text-muted);
    margin-top: var(--space-1);
}
.project-card__image {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-deep);
    margin-bottom: var(--space-2);
    position: relative;
}
.project-card__image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(11, 17, 24, .35));
    pointer-events: none;
}
.project-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .7s var(--ease-out);
}
.project-card:hover .project-card__image img { transform: scale(1.04); }

/* ============================================
   ABILITIES
   ============================================ */
.abilities__grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
}
.ability-category {
    width: 100%;
    text-align: left;
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--accent-teal);
    letter-spacing: .15em;
    margin: var(--space-5) 0 var(--space-2);
    text-transform: uppercase;
    font-weight: 600;
    opacity: .8;
}
.ability-tag {
    padding: var(--space-2) var(--space-5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: .8rem;
    letter-spacing: .04em;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: all var(--duration-smooth) var(--ease-out);
    cursor: default;
}
.ability-tag:hover {
    transform: translateY(-4px);
    border-color: var(--accent-warm);
    background: rgba(102, 192, 244, .06);
    color: #fff;
    box-shadow: 0 8px 24px rgba(102, 192, 244, .06);
}

/* ============================================
   JOURNAL
   ============================================ */
.journal__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}
@media (max-width: 768px) {
    .journal__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .journal__grid { grid-template-columns: 1fr; }
}
.journal-item {
    aspect-ratio: 4/3;
    border-radius: var(--radius-md);
    position: relative;
    cursor: pointer;
    background: #182230;
    transition: all var(--duration-smooth) var(--ease-out);
    opacity: 0;
    transform: translateY(16px);
    border: none;
    padding: 0;
    outline: none;
    overflow: hidden;
}
.journal-item.revealed {
    opacity: 1;
    transform: translateY(0);
}
.journal-item:nth-child(1) { transition-delay: .02s; }
.journal-item:nth-child(2) { transition-delay: .06s; }
.journal-item:nth-child(3) { transition-delay: .10s; }
.journal-item:nth-child(4) { transition-delay: .14s; }
.journal-item:nth-child(5) { transition-delay: .18s; }
.journal-item:nth-child(6) { transition-delay: .22s; }
.journal-item:hover {
    transform: scale(1.02);
    box-shadow: 0 16px 48px rgba(0, 0, 0, .5);
}
.journal-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .7s var(--ease-out);
    display: block;
}
.journal-item:hover img { transform: scale(1.06); }
.journal-item__meta {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-4);
    background: linear-gradient(transparent, rgba(0, 0, 0, .85));
    color: #fff;
    font-size: .8rem;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.journal-item__excerpt {
    font-style: italic;
    opacity: .75;
    font-size: .8rem;
}
.journal-item__full {
    display: none;
    font-size: .8rem;
}
.journal-item:hover .journal-item__full,
.journal-item:focus-visible .journal-item__full {
    display: block;
}
.journal-item:hover .journal-item__excerpt,
.journal-item:focus-visible .journal-item__excerpt {
    display: none;
}
.journal-item__icon {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, .4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-out);
}
.journal-item:hover .journal-item__icon,
.journal-item:focus-visible .journal-item__icon {
    opacity: 1;
}
.journal-item__icon svg {
    stroke: #fff;
    transition: stroke var(--duration-fast);
}
.journal-item:hover .journal-item__icon svg {
    stroke: var(--accent-warm);
}

/* ============================================
   JOURNAL MODAL
   ============================================ */
.journal-modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background: rgba(11, 17, 24, .92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity .4s var(--ease-out);
    padding: var(--space-4);
}
.journal-modal.active {
    opacity: 1;
    pointer-events: auto;
}
.journal-modal__box {
    position: relative;
    max-width: 86vw;
    max-height: 85vh;
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(.94);
    transition: transform .4s var(--ease-bounce);
    box-shadow: 0 32px 80px rgba(0, 0, 0, .7);
}
.journal-modal.active .journal-modal__box { transform: scale(1); }
.journal-modal__close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    background: rgba(0, 0, 0, .5);
    border: none;
    color: #fff;
    font-size: 1.2rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: all var(--duration-fast);
}
.journal-modal__close:hover { background: rgba(255, 255, 255, .15); }
.journal-modal__scroll {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: var(--space-4) var(--space-4) var(--space-2);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.journal-modal__img {
    width: 100%;
    max-height: 60vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    background: #0b0a0f;
}
.journal-modal__desc {
    color: var(--text-secondary);
    font-size: .95rem;
    line-height: 1.7;
    text-align: center;
    padding: 0 var(--space-2);
}
.journal-modal__nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, .3);
    border: 1px solid rgba(255, 255, 255, .04);
    color: #fff;
    opacity: 0.25;
    font-family: var(--font-mono);
    font-size: .85rem;
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--duration-fast);
    z-index: 3;
    backdrop-filter: blur(4px);
}
.journal-modal__nav-btn:hover {
    opacity: 0.8;
    background: rgba(255, 255, 255, .06);
    border-color: rgba(255, 255, 255, .08);
}
.journal-modal__nav-btn--left { left: var(--space-3); }
.journal-modal__nav-btn--right { right: var(--space-3); }

/* ============================================
   CONTACT
   ============================================ */
.contact__inner {
    max-width: 600px;
    margin: 0 auto;
}
.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-6);
}
.contact__form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.contact__form-group label {
    font-family: var(--font-mono);
    font-size: .75rem;
    letter-spacing: .06em;
    color: var(--text-secondary);
    text-transform: uppercase;
}
.contact__form-group input,
.contact__form-group textarea {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
    width: 100%;
    outline: none;
}
.contact__form-group input:focus-visible,
.contact__form-group textarea:focus-visible {
    border-color: var(--accent-warm);
    box-shadow: 0 0 0 4px rgba(102, 192, 244, .10);
}
.contact__form-group input::placeholder,
.contact__form-group textarea::placeholder {
    color: var(--text-muted);
    opacity: .5;
}
.contact__form-group textarea {
    min-height: 120px;
    resize: vertical;
}
.contact__form-submit {
    align-self: flex-start;
    padding: var(--space-3) var(--space-7);
    background: var(--accent-gradient);
    color: #0b1118;
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: .08em;
    cursor: pointer;
    transition: all var(--duration-smooth) var(--ease-out);
    box-shadow: 0 0 24px rgba(102, 192, 244, .12);
}
.contact__form-submit:hover {
    box-shadow: 0 0 40px rgba(102, 192, 244, .25), 0 8px 24px rgba(102, 192, 244, .08);
    transform: scale(1.03) translateY(-2px);
}
.contact__form-submit:active {
    transform: scale(.97);
    transition-duration: .08s;
}
.contact__form-error {
    color: var(--accent-coral);
    font-size: .8rem;
    font-family: var(--font-mono);
    display: none;
}
.contact__form-error.show { display: block; }
.contact__form-success {
    color: var(--accent-teal);
    font-size: .9rem;
    font-family: var(--font-mono);
    display: none;
    padding: var(--space-3);
    border: 1px solid var(--accent-teal);
    border-radius: var(--radius-md);
    background: rgba(244, 162, 97, .04);
}
.contact__form-success.show { display: block; }
.contact__socials {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-6);
}
.contact__social-link {
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) var(--space-6);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    transition: all var(--duration-smooth) var(--ease-out);
    cursor: pointer;
    font-weight: 500;
}
.contact__social-link:hover {
    transform: translateY(-3px);
    border-color: var(--accent-warm);
    color: var(--accent-warm);
    background: rgba(102, 192, 244, .04);
    box-shadow: 0 4px 20px rgba(102, 192, 244, .06);
}
.contact__email {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--accent-warm);
    text-decoration: none;
    border-bottom: 2px dashed var(--accent-warm);
    padding-bottom: var(--space-1);
    transition: all var(--duration-fast) var(--ease-out);
    margin-bottom: var(--space-4);
    cursor: pointer;
    font-weight: 500;
    letter-spacing: .02em;
}
.contact__email:hover {
    color: #fff;
    border-bottom-color: #fff;
}

/* ============================================
   ENDING (FOOTER)
   ============================================ */
.ending {
    text-align: center;
    padding: var(--space-12) var(--section-x) var(--space-10);
    border-top: 1px solid var(--border-subtle);
    position: relative;
    z-index: 10;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.ending.revealed {
    opacity: 1;
    transform: translateY(0);
}
.ending__divider {
    width: 56px;
    height: 2px;
    background: var(--accent-gradient);
    margin: 0 auto var(--space-7);
    border-radius: 2px;
}
.ending__title {
    font-family: var(--font-mono);
    font-size: .75rem;
    letter-spacing: .3em;
    color: var(--accent-teal);
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    opacity: .8;
}
.ending__message {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 400;
    color: #fff;
    margin-bottom: var(--space-3);
}
.ending__continue {
    font-family: var(--font-mono);
    font-size: .8rem;
    color: var(--text-muted);
    margin-top: var(--space-4);
}
.ending__continue-btn {
    background: none;
    border: 1px solid var(--accent-warm);
    border-radius: var(--radius-sm);
    color: var(--accent-warm);
    font-family: var(--font-mono);
    font-size: .8rem;
    padding: var(--space-1) var(--space-4);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    margin: 0 var(--space-1);
    font-weight: 500;
}
.ending__continue-btn:hover {
    background: var(--accent-gradient);
    color: #0b1118;
    border-color: transparent;
}
.ending__reflection {
    max-width: 520px;
    margin: var(--space-5) auto 0;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
}
.ending__signature {
    margin-top: var(--space-6);
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent-teal);
    letter-spacing: .04em;
}
.copyright {
    margin-top: var(--space-7);
    font-size: .8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    letter-spacing: .03em;
}
.copyright a {
    color: var(--accent-warm);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-warm);
    transition: color var(--duration-fast), border-color var(--duration-fast);
}
.copyright a:hover {
    color: #fff;
    border-bottom-color: #fff;
}

/* ============================================
   MUSIC PLAYER
   ============================================ */
.music-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-music);
    background: rgba(11, 17, 24, .88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-subtle);
    box-shadow: 0 -8px 40px rgba(0, 0, 0, .6);
    padding: var(--space-2) var(--space-4);
    transition: transform var(--duration-smooth) var(--ease-out), opacity var(--duration-smooth);
}
.music-player.hidden {
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
}
.music-player__inner {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    max-width: 1100px;
    margin: 0 auto;
    flex-wrap: nowrap;
}
.music-player__play {
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: var(--accent-gradient);
    color: #0b1118;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast);
    box-shadow: 0 0 16px rgba(102, 192, 244, .25);
}
.music-player__play:hover {
    transform: scale(1.1);
    box-shadow: 0 0 28px rgba(102, 192, 244, .35);
}
.music-player__play:active { transform: scale(.92); }
.music-player__play svg {
    width: 20px;
    height: 20px;
    transition: transform .1s;
}
.music-player__info {
    flex: 0 1 auto;
    min-width: 80px;
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.music-player__title {
    font-size: .85rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: .02em;
    white-space: nowrap;
}
.music-player__artist {
    font-size: .7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}
.music-player__progress-wrap {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 120px;
}
.music-player__time-current,
.music-player__time-total {
    font-family: var(--font-mono);
    font-size: .65rem;
    color: var(--text-secondary);
    min-width: 36px;
    text-align: center;
    user-select: none;
}
.music-player__progress {
    flex: 1;
    height: 4px;
    border-radius: 4px;
    background: var(--border-subtle);
    position: relative;
    cursor: pointer;
    transition: height .15s;
}
.music-player__progress:hover { height: 6px; }
.music-player__progress-bar {
    height: 100%;
    border-radius: 4px;
    background: var(--accent-gradient);
    width: 0%;
    transition: width .05s linear;
}
.music-player__progress-thumb {
    position: absolute;
    top: 50%;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity .2s, box-shadow .2s;
    pointer-events: none;
    box-shadow: 0 0 12px rgba(102, 192, 244, .4);
}
.music-player__progress:hover .music-player__progress-thumb { opacity: 1; }
.music-player__volume {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.music-player__volume-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    transition: color var(--duration-fast);
}
.music-player__volume-icon:hover { color: #fff; }
.music-player__volume-slider {
    width: 70px;
    height: 4px;
    background: var(--border-subtle);
    border-radius: 4px;
    position: relative;
    cursor: pointer;
    transition: height .15s;
}
.music-player__volume-slider:hover { height: 6px; }
.music-player__volume-track {
    width: 100%;
    height: 100%;
    position: relative;
}
.music-player__volume-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--accent-gradient);
    width: 80%;
    transition: width .05s linear;
}
.music-player__visualizer {
    flex: 0 0 120px;
    height: 30px;
    border-radius: 4px;
    background: transparent;
    display: block;
}

@media (max-width: 600px) {
    .music-player {
        padding: var(--space-1) var(--space-2);
    }
    .music-player__inner { gap: var(--space-2); }
    .music-player__play {
        flex: 0 0 30px;
        width: 30px;
        height: 30px;
    }
    .music-player__play svg {
        width: 16px;
        height: 16px;
    }
    .music-player__info {
        min-width: 60px;
        flex: 0 1 auto;
    }
    .music-player__title { font-size: .75rem; }
    .music-player__artist { display: none; }
    .music-player__progress-wrap {
        gap: var(--space-1);
        min-width: 60px;
    }
    .music-player__time-current,
    .music-player__time-total {
        font-size: .55rem;
        min-width: 28px;
    }
    .music-player__volume { display: none; }
    .music-player__visualizer { display: none; }
}

/* ============================================
   MOBILE OPTIMIZATION
   ============================================ */
@media (max-width: 768px) {
    .film-grain {
        display: none !important;
    }
    .cinematic-vignette {
        opacity: 0.3;
    }
    .parallax-orb {
        filter: blur(25px) !important;
        opacity: 0.05 !important;
    }
    .nav__links a, 
    .hero__cta, 
    .contact__social-link,
    .music-player__play {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    .project-card, .hero__portrait {
        transform: none !important;
    }
}

/* ============================================
   TOAST
   ============================================ */
.toast {
    position: fixed;
    bottom: 90px;
    right: var(--space-5);
    background: var(--bg-card);
    border: 1px solid var(--accent-warm);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    color: #fff;
    font-family: var(--font-mono);
    font-size: .85rem;
    z-index: var(--z-toast);
    opacity: 0;
    transform: translateY(8px) scale(.96);
    transition: opacity .4s var(--ease-bounce), transform .4s var(--ease-bounce);
    box-shadow: 0 12px 40px rgba(0, 0, 0, .5);
    max-width: 340px;
    backdrop-filter: blur(8px);
}
.toast.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ============================================
   LOADING
   ============================================ */
.loading-placeholder {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: var(--bg-deep);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity .9s var(--ease-out);
    pointer-events: none;
}
.loading-placeholder.hidden { opacity: 0; }
.loading-placeholder__spinner {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-warm);
    animation: spin .8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    .nav,
    .music-player,
    .hero__scroll-indicator,
    #mouse-light,
    .parallax-orb,
    .bg-lighting,
    .cinematic-vignette,
    .film-grain,
    .scroll-progress,
    .hero__canvas {
        display: none !important;
    }
    .hero {
        min-height: auto;
        padding: 40px 20px;
    }
    .hero__content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .section,
    .chapter-item,
    .project-card,
    .journal-item,
    .ending {
        opacity: 1 !important;
        transform: none !important;
        page-break-inside: avoid;
    }
    .chapter-item .chapter-title,
    .project-card .project-card__title {
        clip-path: none !important;
    }
    .journal-modal { display: none !important; }
    .toast { display: none !important; }
    body { background: #fff; color: #111; }
    .hero__name,
    .section__title .highlight {
        -webkit-text-fill-color: #111;
        background: none;
        color: #111;
    }
    .hero__subtitle { color: #555; }
    .hero__tagline { color: #333; }
    .hero__invite { color: #555; }
    .profile__quote { color: #333; border-left-color: #ccc; }
    .profile__info p { color: #333; }
    .profile__stat { background: #f5f5f5; border-color: #ddd; }
    .profile__stat-value { color: #111; }
    .profile__stat-label { color: #555; }
    .chapter-desc { color: #333; }
    .chapter-number { color: #555; }
    .chapter-title { color: #111; }
    .project-card { background: #f5f5f5; border-color: #ddd; }
    .project-card__title { color: #111; }
    .project-card__summary,
    .project-card__full { color: #333; }
    .project-card__stamp { color: #555; border-color: #555; }
    .ability-tag { background: #f5f5f5; border-color: #ddd; color: #333; }
    .ability-category { color: #555; }
    .contact__form-group input,
    .contact__form-group textarea { background: #f5f5f5; border-color: #ddd; color: #111; }
    .contact__form-group label { color: #555; }
    .contact__form-submit { background: #111; color: #fff; }
    .ending__message { color: #111; }
    .ending__reflection { color: #333; }
    .ending__signature { color: #555; }
    .copyright { color: #555; }
    .copyright a { color: #111; }
}

.text-center { text-align: center; }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.hidden { display: none !important; }

/* ============================================
   GPU HARDWARE ACCELERATION OPTIMIZATION
   ============================================ */
.project-card, 
.chapter-item, 
.journal-item {
    contain: layout style paint;
    will-change: transform, opacity;
}
#mouse-light {
    will-change: transform;
}