/* === Custom Scrollbar === */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(var(--vibe-accent-rgb), 0.35) transparent;
}
*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
*::-webkit-scrollbar-track {
    background: transparent;
}
*::-webkit-scrollbar-thumb {
    background: rgba(var(--vibe-accent-rgb), 0.3);
    border-radius: 4px;
}
*::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--vibe-accent-rgb), 0.55);
}
*::-webkit-scrollbar-corner {
    background: transparent;
}

/* === Vibe Theme Variables === */
:root {
    --vibe-bg-start: #1a1a1e;
    --vibe-bg-end: #252530;
    --vibe-surface: rgba(30, 30, 38, 0.95);
    --vibe-text: #ffffff;
    --vibe-text-muted: #b0aab8;
    --vibe-text-faint: #9a8e9e;
    --vibe-accent: rgb(122,138,184);
    --vibe-accent-rgb: 122, 138, 184;
    --vibe-accent2: rgb(150,165,205);
    --vibe-accent2-rgb: 150, 165, 205;
    --vibe-accent3: rgb(100,118,168);
    --vibe-accent3-rgb: 100, 118, 168;
    --vibe-accent-dark: rgb(90,108,158);
    --vibe-accent-light: rgb(160,175,215);
    --vibe-accent-soft: rgb(135,150,190);
}

/* === Base === */
html, body {
    margin: 0;
    min-height: 100%;
    background: #1a1a1e;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    color: var(--vibe-text, #fff);
}
body {
    background: linear-gradient(to bottom, var(--vibe-bg-start, #1a1a1e), var(--vibe-bg-end, #252530));
    overflow-x: hidden;
}

/* === Grid Background === */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(var(--vibe-accent-rgb), 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--vibe-accent-rgb), 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* === Dust Canvas === */
#dustCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* === Main Site Content === */
.main-content {
    min-height: 100vh;
    padding: 40px 10px;
    transition: margin-left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
    position: relative;
    z-index: 2;
}

/* === Hero === */
.hero {
    max-width: 1500px;
    margin: 0 auto;
    text-align: center;
    padding: 80px 20px;
    padding-top: 100px;
}

.hero-logo {
    width: 140px;
    height: 140px;
    object-fit: contain;
    margin-bottom: 20px;
    animation: fadeSlideIn 0.8s ease forwards;
}
.hero h1 {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--vibe-accent3), var(--vibe-accent), var(--vibe-accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    animation: fadeSlideIn 0.8s ease forwards;
}

.hero p {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--vibe-text-muted, #b0aab8);
    margin-bottom: 50px;
    line-height: 1.6;
    animation: fadeSlideIn 0.8s ease 0.15s both;
}

.cta-button-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.cta-button {
    display: block;
    width: 280px;
    text-align: center;
    padding: 20px 0;
    background: linear-gradient(135deg, var(--vibe-accent-dark), var(--vibe-accent));
    color: #fff;
    text-decoration: none;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(var(--vibe-accent-rgb), 0.5),
                inset 0 0 20px rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: fadeSlideIn 0.8s ease 0.3s both;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(var(--vibe-accent-rgb), 0.7),
                inset 0 0 30px rgba(255, 255, 255, 0.2);
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === Content Sections === */
.content-section {
    max-width: 1200px;
    margin: 24px auto;
    padding: 50px 60px;
    background: var(--vibe-surface, rgba(30, 30, 38, 0.95));
    border-radius: 20px;
    border: 2px solid rgba(var(--vibe-accent-rgb), 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.content-section h2 {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    color: var(--vibe-accent);
    margin-bottom: 20px;
    margin-top: 0;
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
}
.project-year {
    margin-left: auto;
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    color: var(--vibe-accent);
    white-space: nowrap;
}

.content-section h3 {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--vibe-accent);
    margin: 28px 0 8px;
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
}
.content-section h3:first-of-type {
    margin-top: 0;
}
.content-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--vibe-text-muted, #b0aab8);
    margin-top: 0;
}

/* === Section Headers === */
.section-header {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(1.4rem, 4vw, 2.2rem);
    color: var(--vibe-accent);
    text-align: center;
    max-width: 1200px;
    margin: 120px auto 10px;
    padding-top: 200px;
    letter-spacing: 3px;
    text-transform: uppercase;
}
.section-divider {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--vibe-accent3), var(--vibe-accent));
    margin: 0 auto 40px;
    border-radius: 2px;
}

/* === Tag / Badge === */
.tag {
    font-size: 0.65rem;
    background: rgba(var(--vibe-accent-rgb), 0.15);
    color: var(--vibe-accent);
    padding: 3px 10px;
    border-radius: 20px;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    border: 1px solid rgba(var(--vibe-accent-rgb), 0.25);
    white-space: nowrap;
}
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

/* === Feature Lists === */
.feature-list {
    list-style: none;
    padding: 0;
    margin: 20px 0 0;
}
.feature-list li {
    color: var(--vibe-text-muted, #b0aab8);
    font-size: 1.05rem;
    line-height: 2;
    padding-left: 24px;
    position: relative;
}
.feature-list li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--vibe-accent);
    font-weight: bold;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

/* === Description Highlight === */
.desc-highlight {
    color: var(--vibe-accent-soft);
    font-weight: 700;
}

/* === Project Link === */
.project-link {
    display: inline-block;
    margin-top: 20px;
    color: var(--vibe-accent);
    text-decoration: none;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    letter-spacing: 2px;
    border-bottom: 1px solid rgba(var(--vibe-accent-rgb), 0.3);
    padding-bottom: 2px;
    transition: border-color 0.3s, color 0.3s;
}
.project-link:hover {
    color: var(--vibe-accent-light);
    border-color: var(--vibe-accent-light);
}

/* === Section Banner Image === */
.section-banner {
    width: calc(100% + 120px);
    margin: -50px -60px 30px;
    border-radius: 18px 18px 0 0;
    display: block;
    object-fit: cover;
    max-height: 330px;
}

/* === Scroll Reveal === */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.shown {
    opacity: 1;
    transform: translateY(0);
}

/* === Animated Site Header === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10000;
    padding: 0 40px;
    box-sizing: border-box;
    background: var(--vibe-surface, rgba(26, 26, 30, 0.95));
    border-bottom: 1px solid rgba(var(--vibe-accent-rgb), 0.2);
}
.site-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--vibe-accent3), var(--vibe-accent), var(--vibe-accent2), var(--vibe-accent), var(--vibe-accent3), transparent);
    background-size: 200% 100%;
    animation: headerGlow 3s linear infinite;
}
@keyframes headerGlow {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.header-logo {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--vibe-accent);
    cursor: pointer;
    transition: filter 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    letter-spacing: 2px;
}
.header-logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}
.header-logo:hover {
    filter: brightness(1.3);
}
.header-nav {
    display: flex;
    gap: 8px;
    position: relative;
    flex: 1;
    justify-content: flex-end;
}
.nav-link {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    color: var(--vibe-text-muted, #b0aab8);
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    transition: color 0.3s, background 0.3s;
    cursor: pointer;
    letter-spacing: 1px;
    border: 1px solid transparent;
}
.nav-link:hover {
    color: var(--vibe-accent);
    background: rgba(var(--vibe-accent-rgb), 0.08);
    border-color: rgba(var(--vibe-accent-rgb), 0.2);
}
.nav-link.active {
    color: var(--vibe-accent);
    background: rgba(var(--vibe-accent-rgb), 0.12);
    border-color: rgba(var(--vibe-accent-rgb), 0.3);
}
.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--vibe-accent3), var(--vibe-accent));
    transition: width 0.3s ease, left 0.3s ease;
}
.nav-link:hover::before,
.nav-link.active::before {
    width: 60%;
    left: 20%;
}

/* === Light/Dark Pull Cord === */
.pull-cord {
    position: fixed;
    top: 46px;
    right: 48px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
}
.pull-cord-string {
    width: 2px;
    height: 46px;
    background: var(--vibe-text, #fff);
    opacity: 0.4;
    transition: background 0.3s;
}
.pull-cord-knob {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--vibe-text, #fff);
    opacity: 0.5;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s, transform 0.15s, border-color 0.3s;
}
.pull-cord:hover .pull-cord-knob {
    opacity: 0.8;
    transform: scale(1.1);
}
.pull-cord-icon {
    width: 12px;
    height: 12px;
    fill: none;
    stroke: var(--vibe-text, #fff);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke 0.3s;
}
.pull-cord-icon.moon-icon path {
    fill: var(--vibe-text, #fff);
    stroke: none;
}
/* Show moon by default (dark mode), hide sun */
.pull-cord .sun-icon { display: none; }
.pull-cord .moon-icon { display: block; }
/* In light mode, show sun, hide moon */
.pull-cord.light-mode .sun-icon { display: block; }
.pull-cord.light-mode .moon-icon { display: none; }

/* Pull animation */
@keyframes pullDown {
    0% { transform: translateY(0); }
    40% { transform: translateY(12px); }
    100% { transform: translateY(0); }
}
.pull-cord.pulling {
    animation: pullDown 0.35s ease-in-out;
}

/* === Contact Page === */
.contact-page {
    display: none;
    min-height: 80vh;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    padding: 60px 20px 60px;
}
.contact-page.active {
    display: flex;
}
.contact-page h1 {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--vibe-accent3), var(--vibe-accent), var(--vibe-accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    animation: fadeSlideIn 0.8s ease forwards;
}
.email-btn {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 22px 50px;
    background: linear-gradient(135deg, var(--vibe-accent-dark), var(--vibe-accent));
    color: #fff;
    text-decoration: none;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 40px rgba(var(--vibe-accent-rgb), 0.4),
                0 0 80px rgba(var(--vibe-accent-rgb), 0.15);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    animation: fadeSlideIn 0.8s ease 0.3s both;
    position: relative;
    overflow: hidden;
}
.email-btn::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s;
}
.email-btn:hover::before {
    opacity: 1;
}
.email-btn:hover {
    transform: translateY(-6px) scale(1.04);
    box-shadow: 0 20px 60px rgba(var(--vibe-accent-rgb), 0.6),
                0 0 120px rgba(var(--vibe-accent-rgb), 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}
.email-btn svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
    flex-shrink: 0;
}

/* Home page content wrapper */
.home-page {
    display: block;
}
.home-page.hidden {
    display: none;
}

/* === Back to Top Button === */
.back-to-top {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(var(--vibe-accent-rgb), 0.3);
    background: var(--vibe-surface, rgba(30, 30, 38, 0.95));
    color: var(--vibe-accent);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}
.back-to-top:hover {
    background: rgba(var(--vibe-accent-rgb), 0.15);
}

/* === Footer === */
.site-footer {
    max-width: 1200px;
    margin: 80px auto 40px;
    padding: 24px 0;
    border-top: 1px solid rgba(var(--vibe-accent-rgb), 0.15);
    text-align: center;
}
.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}
.footer-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    color: var(--vibe-text-muted);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-links a:hover {
    color: var(--vibe-accent);
}
.footer-copy {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 0.7rem;
    color: var(--vibe-text-faint);
    opacity: 0.5;
    letter-spacing: 3px;
}

/* === Stats Grid === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin: 30px 0;
}
.stat-card {
    background: rgba(var(--vibe-accent-rgb), 0.12);
    border: 1px solid rgba(var(--vibe-accent-rgb), 0.25);
    border-radius: 14px;
    padding: 22px 16px;
    text-align: center;
    transition: border-color 0.3s, background 0.3s;
}
.stat-card:hover {
    border-color: rgba(var(--vibe-accent-rgb), 0.5);
    background: rgba(var(--vibe-accent-rgb), 0.2);
}
.stat-value {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--vibe-accent);
    font-weight: 700;
}
.stat-label {
    font-size: 0.8rem;
    color: var(--vibe-text-faint);
    margin-top: 8px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* === Responsive === */
@media (max-width: 768px) {
    .content-section {
        padding: 30px 20px;
        margin: 30px 20px;
    }
    .section-header {
        margin-top: 60px;
    }
    .site-header {
        padding: 0 16px;
    }
    .email-btn {
        padding: 18px 36px;
        font-size: 1.1rem;
    }
    .section-banner {
        width: calc(100% + 40px);
        margin: -30px -20px 20px;
    }
    .email-btn {
        padding: 18px 36px;
        font-size: 1.1rem;
    }
    .header-logo {
        font-size: 0;
        gap: 0;
    }
    .header-logo-img {
        width: 28px;
        height: 28px;
    }
    .content-section h2 {
        font-size: clamp(1.1rem, 4vw, 1.6rem);
    }
    .project-year {
        font-size: 0.65rem;
    }
    .cta-button-group {
        gap: 10px;
    }
    .cta-button {
        width: 220px;
        padding: 14px 0;
        font-size: 0.9rem;
    }
    .pull-cord {
        right: 16px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}