/* =========================================================
   ROOT VARIABLES
   ========================================================= */
:root {
    --bg-deep: #0a0f1e;
    --bg-panel: #111827;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --cyan: #22d3ee;
    --blue: #60a5fa;
    --violet: #a78bfa;
    --pink: #f472b6;
    --emerald: #34d399;
    --amber: #fbbf24;

    --accent: var(--cyan);   /* dynamic, changes per scene */
    --accent-2: var(--blue);
    --accent-3: var(--violet);

    --grad-main: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 50%, var(--violet) 100%);
    --border-soft: rgba(148, 180, 235, 0.14);
    --border-glow: rgba(96, 165, 250, 0.5);

    --ease-cinematic: cubic-bezier(0.65, 0, 0.35, 1);
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, sans-serif;
    overflow: hidden;   /* critical for cinematic scroll */
    height: 100vh;
    width: 100vw;
}

body { position: relative; }

/* =========================================================
   BACKGROUND FX (dynamic per scene)
   ========================================================= */
.bg-fx {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
    transition: background 1.2s var(--ease-cinematic);
}

.bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 180, 235, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 180, 235, 0.055) 1px, transparent 1px);
    background-size: 70px 70px;
    mask-image: radial-gradient(ellipse at center, black 25%, transparent 85%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 25%, transparent 85%);
    transition: opacity 1s ease;
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.32;
    transition: background 1.2s var(--ease-cinematic);
    will-change: transform;
}

.orb-1 {
    width: 560px; height: 560px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    top: -180px; left: -180px;
    animation: float1 26s ease-in-out infinite;
}
.orb-2 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, var(--accent-3) 0%, transparent 70%);
    top: 40%; right: -200px;
    animation: float2 30s ease-in-out infinite;
}
.orb-3 {
    width: 460px; height: 460px;
    background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
    bottom: -160px; left: 35%;
    animation: float3 24s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0,0) scale(1); }
    50% { transform: translate(80px, -60px) scale(1.1); }
}
@keyframes float2 {
    0%, 100% { transform: translate(0,0) scale(1); }
    50% { transform: translate(-70px, 70px) scale(0.92); }
}
@keyframes float3 {
    0%, 100% { transform: translate(0,0) scale(1); }
    50% { transform: translate(50px, -40px) scale(1.08); }
}

/* Particle canvas */
#particles {
    position: absolute;
    inset: 0;
    opacity: 0.5;
}

/* =========================================================
   LEFT NAVIGATION
   ========================================================= */
.nav-rail {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 240px;
    z-index: 60;
    padding: 40px 0 40px 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    pointer-events: none;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    pointer-events: auto;
    position: relative;
}

/* Timeline line */
.nav-line {
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: rgba(148, 180, 235, 0.12);
    border-radius: 2px;
    overflow: hidden;
}

.nav-line-fill {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 0%;
    background: var(--grad-main);
    transition: height 0.7s var(--ease-cinematic);
    box-shadow: 0 0 12px var(--accent);
}

.nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 7px 14px 7px 22px;
    cursor: pointer;
    border-radius: 8px;
    opacity: 0.4;
    transform: scale(0.9);
    transform-origin: left center;
    transition: all 0.45s var(--ease-cinematic);
    will-change: transform, opacity;
    user-select: none;
    color: var(--text-secondary);
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scaleY(0);
    width: 3px;
    height: 60%;
    background: var(--accent);
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 14px var(--accent);
    transition: transform 0.45s var(--ease-cinematic);
}

.nav-item .nav-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    min-width: 18px;
    transition: color 0.4s ease;
}

.nav-item .nav-icon {
    font-size: 11px;
    width: 14px;
    text-align: center;
    opacity: 0.7;
    transition: all 0.4s ease;
}

.nav-item .nav-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: color 0.4s ease;
}

.nav-item:hover {
    opacity: 0.75;
    transform: scale(0.95) translateX(2px);
}

.nav-item.active {
    opacity: 1;
    transform: scale(1.1);
    color: var(--text-primary);
}

.nav-item.active::before { transform: translateY(-50%) scaleY(1); }

.nav-item.active .nav-num {
    color: var(--accent);
    text-shadow: 0 0 12px var(--accent);
}

.nav-item.active .nav-icon {
    opacity: 1;
    color: var(--accent);
    text-shadow: 0 0 14px var(--accent);
    transform: scale(1.15);
}

.nav-item.active .nav-label {
    color: var(--text-primary);
    text-shadow: 0 0 20px var(--accent);
}

/* =========================================================
   SCENE SYSTEM
   ========================================================= */
.scenes {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100vh;
}

.scene {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 60px 60px 60px 300px;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.96);
    filter: blur(8px);
    transition:
        opacity 0.9s var(--ease-cinematic),
        transform 0.9s var(--ease-cinematic),
        filter 0.9s var(--ease-cinematic),
        visibility 0s linear 0.9s;
    overflow: hidden;
    will-change: opacity, transform, filter;
}

.scene.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    filter: blur(0);
    transition:
        opacity 0.9s var(--ease-cinematic),
        transform 0.9s var(--ease-cinematic),
        filter 0.9s var(--ease-cinematic),
        visibility 0s;
}

.about-me-scene {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    gap: 16px;
    overflow: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}

/* Scene stagger animations */
.scene [data-anim] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}
.scene.active [data-anim] { opacity: 1; transform: translateY(0); }
.scene.active [data-anim="1"] { transition-delay: 0.15s; }
.scene.active [data-anim="2"] { transition-delay: 0.3s; }
.scene.active [data-anim="3"] { transition-delay: 0.45s; }
.scene.active [data-anim="4"] { transition-delay: 0.6s; }
.scene.active [data-anim="5"] { transition-delay: 0.75s; }
.scene.active [data-anim="6"] { transition-delay: 0.9s; }
.scene.active [data-anim="7"] { transition-delay: 1.05s; }
.scene.active [data-anim="8"] { transition-delay: 1.2s; }

/* =========================================================
   TOP-RIGHT CONTROLS (lang + progress)
   ========================================================= */
.top-controls {
    position: fixed;
    top: 24px;
    right: 28px;
    z-index: 70;
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switcher {
    display: flex;
    gap: 2px;
    padding: 4px;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-soft);
    border-radius: 100px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.lang-btn {
    padding: 6px 14px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang-btn:hover { color: var(--text-primary); }

.lang-btn.active {
    background: var(--grad-main);
    color: #fff;
    box-shadow: 0 4px 15px rgba(96, 165, 250, 0.4);
}

.lang-btn i { font-size: 10px; }

/* Progress indicator */
.progress-indicator {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
}

.progress-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.progress-text .current { color: var(--accent); font-weight: 600; }

.progress-bar {
    width: 100px;
    height: 2px;
    background: rgba(148, 180, 235, 0.15);
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    position: absolute;
    left: 0; top: 0;
    height: 100%;
    background: var(--grad-main);
    border-radius: 2px;
    transition: width 0.7s var(--ease-cinematic);
    box-shadow: 0 0 8px var(--accent);
}

/* =========================================================
   SCENE 01 — HOME
   ========================================================= */
.home-scene {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.home-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(46px, 7vw, 100px);
    font-weight: 700;
    letter-spacing: -0.045em;
    line-height: 1;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 45%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.about-profile-card {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(90px, 0.24fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(16px, 2.4vw, 32px);
    padding: clamp(18px, 2.4vw, 30px);
    background: transparent;
}

.about-profile-info {
    min-width: 0;
    padding: clamp(14px, 1.8vw, 22px);
    background: transparent;
}

.profile-photo-frame {
    width: 100%;
    max-width: 150px;
    aspect-ratio: 4 / 5;
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
    background:
        linear-gradient(145deg, rgba(34, 211, 238, 0.1), rgba(96, 165, 250, 0.04)),
        rgba(15, 23, 42, 0.72);
    border: 1px solid var(--border-glow);
    border-radius: 18px;
    box-shadow: 0 0 36px rgba(34, 211, 238, 0.12), inset 0 0 28px rgba(96, 165, 250, 0.06);
}

.profile-photo-frame i {
    font-size: clamp(34px, 5vw, 58px);
    color: var(--accent);
}

.profile-photo-frame span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.about-section {
    width: 100%;
    max-width: none;
    padding: 20px clamp(18px, 2.4vw, 30px);
    background: transparent;
}

.profile-details {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: 12px 28px;
    margin-top: 18px;
    color: var(--text-secondary);
    font-size: clamp(12px, 1.05vw, 14px);
    line-height: 1.6;
}
.profile-detail {
    display: flex;
    align-items: baseline;
    gap: 12px;
    min-width: 0;
    color: inherit;
    text-decoration: none;
}
.profile-detail i { width: 16px; flex-shrink: 0; text-align: center; color: var(--accent); }
.profile-detail span { overflow-wrap: anywhere; }
.profile-detail span { white-space: pre-line; }
.about-content { display: block; white-space: normal; overflow-wrap: anywhere; }
.project-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; border-radius: inherit; }
.has-project-image :is(.project-visual-icon,.project-visual-label) { visibility: hidden; }
.cert-body { flex: 1; min-width: 0; }
.cert-meta { display: flex; flex-wrap: wrap; gap: 4px 12px; margin-top: 6px; font-size: 11px; color: var(--text-muted); }
.cert-meta a { color: var(--accent); }
.cert-image { display: block; max-width: 100%; max-height: 150px; object-fit: contain; margin-top: 12px; border-radius: 8px; }
.profile-detail-address,.profile-detail-wide { grid-column: 1 / -1; }
a.profile-detail:hover { color: var(--accent); }
a.profile-detail:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 3px; }
@media(max-width:600px) {
    .profile-details { grid-template-columns: minmax(0,1fr); gap: 10px; }
}

.home-roles {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.about-me-scene .home-name {
    font-size: clamp(34px, 4.6vw, 62px);
    letter-spacing: -0.05em;
    margin-bottom: 14px;
}

.about-me-scene .home-role {
    padding: 7px 12px;
    font-size: 11px;
}

.about-me-scene .home-roles {
    gap: 8px;
    margin-bottom: 18px;
}

.about-me-scene .home-tagline {
    font-size: clamp(11px, 1.1vw, 13px);
    margin-bottom: 22px;
}

.about-me-scene .about-text {
    font-size: clamp(13px, 1.15vw, 15px);
    line-height: 1.58;
}

.about-me-scene .about-text p {
    margin-bottom: 10px;
}

.about-me-scene .about-text p:last-child {
    margin-bottom: 0;
}

.home-role {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-soft);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

.home-role i { color: var(--accent); font-size: 12px; }

.home-tagline {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 40px;
    padding-left: 16px;
    border-left: 2px solid var(--accent);
}

.home-tagline .cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background: var(--accent);
    margin-left: 4px;
    vertical-align: middle;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.home-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.35);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--emerald);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--emerald);
    box-shadow: 0 0 12px var(--emerald);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    font-weight: 500;
    letter-spacing: 3px;
    color: var(--text-muted);
    text-transform: uppercase;
    opacity: 0.8;
    animation: fadeInOut 3s ease-in-out infinite;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.9; }
}

.scroll-mouse {
    width: 22px;
    height: 34px;
    border: 1.5px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 6px;
    background: var(--accent);
    border-radius: 2px;
    animation: scrollDown 1.8s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { opacity: 0; transform: translate(-50%, 0); }
    30% { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, 14px); }
}

/* =========================================================
   SCENE 02 — ABOUT
   ========================================================= */
.about-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 60px;
    align-items: start;
    max-width: 1200px;
}

.about-marker {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 140px;
    font-weight: 700;
    line-height: 0.85;
    letter-spacing: -6px;
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0.9;
    margin-bottom: 8px;
}

.about-keyword {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 3px;
    color: var(--text-muted);
    text-transform: uppercase;
    padding-left: 8px;
    border-left: 2px solid var(--accent);
}

.about-text {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
    max-width: 1000px;
}

.about-text p { margin-bottom: 18px; }

.about-text .hl {
    font-weight: 600;
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
}

.about-text .hl::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--grad-main);
    opacity: 0.4;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.9s var(--ease-out-expo);
}

.scene.active .about-text .hl::after {
    transform: scaleX(1);
    transition-delay: 1.4s;
}

.scene-header {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.scene-header::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

/* =========================================================
   SCENE 03 — SKILLS
   ========================================================= */
.skills-layout {
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 32px;
}

.skill-cluster {
    position: relative;
    padding: 22px 22px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.4s var(--ease-cinematic);
}

.skill-cluster:hover {
    border-color: var(--border-glow);
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3), 0 0 30px var(--cluster-glow, rgba(96,165,250,0.15));
}

.skill-cluster[data-accent="cyan"] { --cluster-color: var(--cyan); --cluster-glow: rgba(34,211,238,0.2); }
.skill-cluster[data-accent="violet"] { --cluster-color: var(--violet); --cluster-glow: rgba(167,139,250,0.2); }
.skill-cluster[data-accent="pink"] { --cluster-color: var(--pink); --cluster-glow: rgba(244,114,182,0.2); }
.skill-cluster[data-accent="emerald"] { --cluster-color: var(--emerald); --cluster-glow: rgba(52,211,153,0.2); }
.skill-cluster[data-accent="amber"] { --cluster-color: var(--amber); --cluster-glow: rgba(251,191,36,0.2); }
.skill-cluster[data-accent="blue"] { --cluster-color: var(--blue); --cluster-glow: rgba(96,165,250,0.2); }

.skill-cluster-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.skill-cluster-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-soft);
    color: var(--cluster-color);
    font-size: 13px;
    transition: all 0.3s ease;
}

.skill-cluster:hover .skill-cluster-icon {
    border-color: var(--cluster-color);
    box-shadow: 0 0 16px var(--cluster-glow);
}

.skill-cluster-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-primary);
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.skill-pills span {
    font-size: 11px;
    font-weight: 500;
    padding: 4px 10px;
    background: rgba(255,255,255,0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-soft);
    border-radius: 6px;
    transition: all 0.25s ease;
    cursor: default;
}

.skill-cluster:hover .skill-pills span { opacity: 0.55; }

.skill-pills span:hover {
    opacity: 1 !important;
    color: var(--cluster-color) !important;
    border-color: var(--cluster-color) !important;
    background: var(--cluster-glow) !important;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 16px var(--cluster-glow);
}

/* =========================================================
   SCENE 04 — PROJECTS (Carousel)
   ========================================================= */
.projects-layout {
    max-width: 1320px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
}

.projects-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 26px;
    flex-wrap: wrap;
    gap: 16px;
}

.project-counter {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

.project-counter .current { color: var(--accent); font-size: 22px; font-weight: 600; }

.carousel-nav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.carousel-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border-soft);
    background: rgba(15, 23, 42, 0.6);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.3s var(--ease-cinematic);
    backdrop-filter: blur(10px);
}

.carousel-btn:hover:not(:disabled) {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34, 211, 238, 0.1);
    transform: scale(1.08);
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
}

.carousel-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.carousel-viewport {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 20px;
}

.carousel-track {
    display: flex;
    transition: transform 0.7s var(--ease-cinematic);
    will-change: transform;
}

.project-slide {
    flex: 0 0 100%;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 32px;
    padding: 32px 36px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    min-height: 440px;
    position: relative;
    overflow: hidden;
}

.project-slide::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-main);
    opacity: 0.7;
}

.project-slide-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-num-big {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--accent);
    margin-bottom: 12px;
}

.project-title-big {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(22px, 2.4vw, 30px);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 18px;
}

.project-tech span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    font-weight: 500;
    padding: 3px 10px;
    background: rgba(96, 165, 250, 0.1);
    color: #93c5fd;
    border: 1px solid rgba(96, 165, 250, 0.25);
    border-radius: 6px;
}

.project-summary {
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 22px;
    max-width: 560px;
}

.project-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 100px;
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s var(--ease-cinematic);
}

.action-btn.primary {
    background: var(--grad-main);
    color: #fff;
    border: none;
    box-shadow: 0 6px 20px rgba(96, 165, 250, 0.35);
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(96, 165, 250, 0.5);
}

.action-btn.ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-soft);
}

.action-btn.ghost:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(34, 211, 238, 0.08);
}

/* Right visual mockup */
.project-slide-right {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.project-visual {
    width: 100%;
    height: 100%;
    max-height: 340px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.06), rgba(167, 139, 250, 0.06));
    border: 1px solid var(--border-soft);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.project-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148,180,235,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148,180,235,0.05) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.6;
}

.project-visual-icon {
    position: relative;
    font-size: 72px;
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0.85;
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.4));
}

.project-visual-label {
    position: absolute;
    bottom: 14px;
    right: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    text-transform: uppercase;
    opacity: 0.7;
}

/* Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 22px;
}

.carousel-dot {
    width: 32px;
    height: 3px;
    border-radius: 2px;
    background: rgba(148, 180, 235, 0.15);
    cursor: pointer;
    transition: all 0.4s var(--ease-cinematic);
    border: none;
    padding: 0;
}

.carousel-dot:hover { background: rgba(148, 180, 235, 0.35); }

.carousel-dot.active {
    background: var(--grad-main);
    box-shadow: 0 0 10px var(--accent);
    width: 42px;
}

/* =========================================================
   SCENE 05 — EXPERIENCE
   ========================================================= */
.exp-layout {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

.timeline-holder {
    position: relative;
    padding-left: 40px;
    margin-top: 32px;
}

.timeline-line {
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(148, 180, 235, 0.12);
    border-radius: 2px;
    overflow: hidden;
}

.timeline-line-fill {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(180deg, var(--accent), var(--accent-3));
    box-shadow: 0 0 16px var(--accent);
    transition: height 1.4s var(--ease-cinematic);
}

.scene.active .timeline-line-fill { height: 100%; }

.tl-entry {
    position: relative;
    padding-bottom: 36px;
}

.tl-entry:last-child { padding-bottom: 0; }

.tl-entry::before {
    content: '';
    position: absolute;
    left: -38px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 16px var(--accent);
    border: 2px solid var(--bg-deep);
    opacity: 0;
    transform: scale(0);
    transition: all 0.5s var(--ease-out-expo);
}

.scene.active .tl-entry::before {
    opacity: 1;
    transform: scale(1);
    transition-delay: 0.5s;
}

.scene.active .tl-entry:nth-child(2)::before { transition-delay: 0.7s; }
.scene.active .tl-entry:nth-child(3)::before { transition-delay: 0.9s; }
.scene.active .tl-entry:nth-child(4)::before { transition-delay: 1.1s; }

.tl-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.tl-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tl-sub {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-2);
    margin-bottom: 10px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.5px;
}

.tl-desc {
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--text-secondary);
    max-width: 720px;
}

/* =========================================================
   SCENE 06 — EDUCATION
   ========================================================= */
.edu-layout {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

.edu-card {
    padding: 32px 36px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
}

.edu-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-main);
}

.edu-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.edu-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.edu-major {
    font-size: 14px;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}

.edu-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-muted);
    padding: 6px 14px;
    background: rgba(148, 180, 235, 0.06);
    border-radius: 100px;
    border: 1px solid var(--border-soft);
    white-space: nowrap;
}

.gpa-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 20px 0;
}

.gpa-card {
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
}

.gpa-label {
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.gpa-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.gpa-value.hl {
    background: linear-gradient(135deg, var(--emerald), #6ee7b7);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.gpa-value small {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.course-tags span {
    font-size: 11px;
    font-weight: 500;
    padding: 4px 12px;
    background: rgba(167, 139, 250, 0.1);
    color: #c4b5fd;
    border: 1px solid rgba(167, 139, 250, 0.25);
    border-radius: 100px;
}

/* =========================================================
   SCENE 07 — CERTIFICATES
   ========================================================= */
.certs-layout {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

.certs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 24px;
}

.cert-col-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cert-col-title i { color: var(--accent); }

.cert-list {
    display: grid;
    gap: 10px;
}

.cert-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-soft);
    border-radius: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.cert-item:hover {
    border-color: var(--border-glow);
    transform: translateX(4px);
    background: rgba(15, 23, 42, 0.7);
}

.cert-item i {
    color: var(--emerald);
    font-size: 13px;
    margin-top: 2px;
}

.cert-item.planned i { color: var(--text-muted); }

/* =========================================================
   SCENE 08 — CONTACT
   ========================================================= */
.contact-layout {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
}

.contact-headline {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(32px, 5vw, 60px);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #bfdbfe 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.contact-sub {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-bottom: 36px;
}

.contact-card {
    padding: 20px 22px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-soft);
    border-radius: 14px;
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.35s var(--ease-cinematic);
    backdrop-filter: blur(12px);
    text-align: left;
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3), 0 0 30px rgba(34,211,238,0.15);
    color: var(--text-primary);
}

.contact-card .cc-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.3);
    color: var(--accent);
    font-size: 15px;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-card:hover .cc-icon {
    background: var(--grad-main);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 24px rgba(96, 165, 250, 0.5);
}

.contact-card .cc-label {
    font-size: 10.5px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-card .cc-value {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-word;
}

.contact-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 36px;
    border-radius: 100px;
    background: var(--grad-main);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1px;
    box-shadow: 0 10px 40px rgba(96, 165, 250, 0.4);
    transition: all 0.35s var(--ease-cinematic);
    position: relative;
    overflow: hidden;
}

.contact-cta::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s ease;
}

.contact-cta:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 18px 50px rgba(96, 165, 250, 0.55);
}

.contact-cta:hover::before { left: 100%; }

.contact-cta i { transition: transform 0.3s ease; }
.contact-cta:hover i { transform: translateX(4px); }

/* Footer */
.scene-footer {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
    opacity: 0.6;
}

/* =========================================================
   CUSTOM CURSOR (desktop only)
   ========================================================= */
.cursor-dot {
    position: fixed;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.15s ease, opacity 0.3s ease;
    box-shadow: 0 0 12px var(--accent);
    mix-blend-mode: screen;
    opacity: 0;
}

.cursor-ring {
    position: fixed;
    width: 32px;
    height: 32px;
    border: 1.5px solid rgba(34, 211, 238, 0.5);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.25s ease, width 0.25s ease, height 0.25s ease, opacity 0.3s ease;
    mix-blend-mode: screen;
    opacity: 0;
}

body.cursor-ready .cursor-dot,
body.cursor-ready .cursor-ring { opacity: 1; }

/* =========================================================
   LANGUAGE VISIBILITY
   ========================================================= */
[data-lang="vi"] .lang-en { display: none !important; }
[data-lang="en"] .lang-vi { display: none !important; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1100px) {
    .nav-rail { width: 190px; padding-left: 20px; }
    .nav-item .nav-label { font-size: 11.5px; letter-spacing: 1.2px; }
    .scene { padding: 50px 40px 50px 230px; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
    .about-layout { grid-template-columns: 180px 1fr; gap: 40px; }
    .about-marker { font-size: 110px; }
}

@media (max-width: 900px) {
    /* Nav becomes compact bottom bar */
    .nav-rail {
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: auto;
        padding: 12px 16px;
        background: rgba(10, 15, 30, 0.92);
        border-top: 1px solid var(--border-soft);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: row;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: none;
    }
    .nav-rail::-webkit-scrollbar { display: none; }
    .nav-list {
        flex-direction: row;
        gap: 4px;
    }
    .nav-line { display: none; }
    .nav-item {
        flex-shrink: 0;
        padding: 8px 14px;
        transform: none;
        border-radius: 100px;
        border: 1px solid transparent;
    }
    .nav-item::before { display: none; }
    .nav-item.active {
        transform: none;
        background: rgba(34, 211, 238, 0.1);
        border-color: var(--accent);
    }
    .nav-item .nav-num { display: none; }
    .nav-item .nav-label { font-size: 11px; letter-spacing: 1px; }
    .nav-item .nav-icon { font-size: 12px; }

    .scene {
        padding: 70px 20px 110px;
        justify-content: flex-start;
        overflow-y: auto;
        overflow-x: hidden;
    }

    /* Allow mobile scroll if content overflows */
    .scene.active {
        height: 100vh;
        overflow-y: auto;
    }

    .about-me-scene {
        display: block;
        overflow-y: auto;
    }
    .about-profile-card {
        grid-template-columns: minmax(76px, 0.25fr) minmax(0, 1fr);
        gap: 14px;
        padding: 16px;
    }
    .about-section { padding: 18px 16px; }

    .top-controls { top: 14px; right: 14px; gap: 10px; }
    .lang-btn { padding: 5px 10px; font-size: 10.5px; }
    .progress-bar { width: 70px; }
    .progress-text { font-size: 10px; }

    .skills-grid { grid-template-columns: 1fr; }
    .about-layout { grid-template-columns: 1fr; gap: 20px; }
    .about-marker { font-size: 80px; letter-spacing: -3px; }
    .about-text { font-size: 14.5px; }
    .about-me-scene .home-name { font-size: clamp(30px, 7vw, 42px); }
    .profile-photo-frame { border-radius: 16px; }
    .profile-photo-frame span { font-size: 8px; }

    .project-slide {
        grid-template-columns: 1fr;
        padding: 24px 22px;
        min-height: auto;
    }
    .project-slide-right { display: none; }

    .gpa-grid { grid-template-columns: 1fr; }
    .certs-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }

    .cursor-dot, .cursor-ring { display: none; }

    .home-name { letter-spacing: -0.05em; }
    .home-roles { flex-direction: column; align-items: flex-start; }

    .scroll-hint { display: none; }

    /* Reduce bg intensity */
    .bg-orb { filter: blur(100px); opacity: 0.2; }
    #particles { opacity: 0.25; }
}

@media (max-width: 480px) {
    .scene { padding: 60px 16px 100px; }
    .about-profile-card { grid-template-columns: 76px minmax(0, 1fr); gap: 12px; padding: 14px; }
    .about-me-scene .home-name { font-size: clamp(27px, 7vw, 34px); }
    .about-me-scene .home-role { padding: 6px 9px; font-size: 10px; }
    .about-me-scene .home-roles { gap: 6px; }
    .about-me-scene .home-tagline { font-size: 10px; }
    .project-title-big { font-size: 20px; }
    .contact-headline { letter-spacing: -1px; }
    .edu-card { padding: 22px 20px; }
    .edu-title { font-size: 20px; }
}

/* =========================================================
   PREFERS REDUCED MOTION
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.15s !important;
    }
    .bg-orb { animation: none; }
    .scroll-mouse::after { animation: none; }
    .status-dot { animation: none; }
    .home-tagline .cursor { animation: none; }
}