/* ════════════════════════════════════════
   DESIGN TOKENS
   ════════════════════════════════════════ */
:root {
    /* palette */
    --bg:            #0b0e17;
    --bg-surface:    #111828;
    --bg-card:       rgba(23, 32, 55, .55);
    --border-card:   rgba(99, 140, 255, .12);
    --text:          #e4e8f1;
    --text-muted:    #8892a8;
    --accent:        #6c8cff;
    --accent-alt:    #a78bfa;
    --gradient:      linear-gradient(135deg, var(--accent), var(--accent-alt));

    /* sizing */
    --max-w:         1160px;
    --radius:        14px;
    --radius-sm:     8px;

    /* transition */
    --ease:          cubic-bezier(.4, 0, .2, 1);
}

/* ════════════════════════════════════════
   RESET & BASE
   ════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

::selection {
    background: var(--accent);
    color: var(--bg);
}

/* ════════════════════════════════════════
   NAV
   ════════════════════════════════════════ */
#main-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(11, 14, 23, .7);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-card);
    transition: background .3s var(--ease);
}

.nav-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 64px;
}

.nav-logo {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -1px;
}
.nav-logo .accent {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}
.nav-links a {
    font-size: .88rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color .25s var(--ease);
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0; bottom: -4px;
    width: 0; height: 2px;
    background: var(--gradient);
    border-radius: 2px;
    transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

/* ════════════════════════════════════════
   HERO
   ════════════════════════════════════════ */
#hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    width: 700px; height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(108,140,255,.18) 0%, transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow {
    0%, 100% { opacity: .5; transform: translate(-50%, -50%) scale(1); }
    50%      { opacity: 1;  transform: translate(-50%, -50%) scale(1.15); }
}

.hero-content { position: relative; z-index: 1; }

.hero-greeting {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: .5rem;
    opacity: 0;
    animation: fade-up .7s var(--ease) .2s forwards;
}

.hero-name {
    font-size: clamp(3rem, 10vw, 6.5rem);
    font-weight: 800;
    letter-spacing: -3px;
    line-height: 1.05;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    animation: fade-up .7s var(--ease) .4s forwards;
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    color: var(--text-muted);
    max-width: 480px;
    margin: 1rem auto 2rem;
    opacity: 0;
    animation: fade-up .7s var(--ease) .6s forwards;
}

.btn-primary {
    display: inline-block;
    padding: .85rem 2.4rem;
    background: var(--gradient);
    color: #fff;
    font-weight: 600;
    font-size: .95rem;
    border-radius: 50px;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease);
    opacity: 0;
    animation: fade-up .7s var(--ease) .8s forwards;
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(108,140,255,.35);
}

/* scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fade-up .7s var(--ease) 1.2s forwards;
}
.scroll-indicator span {
    display: block;
    width: 22px; height: 36px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}
.scroll-indicator span::after {
    content: '';
    position: absolute;
    width: 4px; height: 8px;
    background: var(--accent);
    border-radius: 3px;
    top: 6px; left: 50%;
    transform: translateX(-50%);
    animation: scroll-dot 2s ease-in-out infinite;
}
@keyframes scroll-dot {
    0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(14px); }
}

@keyframes fade-up {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════
   SECTIONS (shared)
   ════════════════════════════════════════ */
section {
    padding: 6rem 2rem;
}

.section-inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 2.5rem;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    position: absolute;
    left: 0; bottom: -8px;
    width: 48px; height: 3px;
    background: var(--gradient);
    border-radius: 3px;
}

/* ════════════════════════════════════════
   TAG FILTERS
   ════════════════════════════════════════ */
.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: .6rem;
    margin-bottom: 2.5rem;
}

.tag-btn {
    padding: .4rem 1rem;
    font-size: .8rem;
    font-weight: 500;
    font-family: inherit;
    border: 1px solid var(--border-card);
    border-radius: 50px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all .25s var(--ease);
}
.tag-btn:hover,
.tag-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* ════════════════════════════════════════
   PROJECT GRID
   ════════════════════════════════════════ */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 1.8rem;
}

/* ── Card ── */
.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
    opacity: 0;
    transform: translateY(30px);
}
.project-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(108,140,255,.12);
    border-color: rgba(108,140,255,.3);
}

.card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-bottom: 1px solid var(--border-card);
}

.card-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--bg-surface), rgba(108,140,255,.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.8rem;
    border-bottom: 1px solid var(--border-card);
    user-select: none;
}

.card-body {
    padding: 1.6rem;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: .5rem;
}

.card-desc {
    font-size: .88rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
    line-height: 1.6;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
    margin-bottom: 1.2rem;
}

.card-tag {
    font-size: .72rem;
    font-weight: 500;
    padding: .25rem .7rem;
    border-radius: 50px;
    background: rgba(108,140,255,.1);
    color: var(--accent);
}

.card-links {
    display: flex;
    gap: 1rem;
}
.card-link {
    font-size: .82rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: .35rem;
    transition: color .2s var(--ease);
}
.card-link:hover { color: var(--accent-alt); }
.card-link svg { width: 16px; height: 16px; }

/* ════════════════════════════════════════
   ABOUT
   ════════════════════════════════════════ */
#about {
    background: var(--bg-surface);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--text-muted);
    font-size: .95rem;
    margin-bottom: 1rem;
    max-width: 580px;
}

.about-stats {
    display: flex;
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius);
    padding: 2rem 2.4rem;
    text-align: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.stat-number {
    display: block;
    font-size: 2.6rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-label {
    font-size: .8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: .3rem;
    display: block;
}

/* ════════════════════════════════════════
   CONTACT
   ════════════════════════════════════════ */
#contact {
    text-align: center;
}

.contact-blurb {
    color: var(--text-muted);
    max-width: 500px;
    margin: -1rem auto 2.5rem;
    font-size: .95rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    padding: .75rem 1.8rem;
    border: 1px solid var(--border-card);
    border-radius: 50px;
    font-size: .88rem;
    font-weight: 500;
    color: var(--text);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all .25s var(--ease);
}
.contact-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(108,140,255,.15);
}

/* ════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════ */
#site-footer {
    text-align: center;
    padding: 2.5rem 2rem;
    font-size: .8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-card);
}

/* ════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════ */
@media (max-width: 768px) {
    .nav-links { gap: 1.2rem; }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .about-stats {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-inner { padding: 0 1.2rem; }
    section { padding: 4rem 1.2rem; }
    .hero-name { letter-spacing: -1px; }
}