/* Design tokens */
:root {
    --bg: #0b0f19;
    --surface: #101626;
    --text: #e6ecff;
    --muted: #9aa4bf;
    --primary: #4f7cff;
    --primary-700: #3f63cc;
    --accent: #22d3ee;
    --ring: #4f7cff55;
    --border: #22304d;
    --success: #16a34a;
    --danger: #ef4444;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

[data-theme="light"] {
    --bg: #ffffff;
    --surface: #f7f8fc;
    --text: #0b1220;
    --muted: #4b587a;
    --primary: #1d4ed8;
    --primary-700: #153ea9;
    --accent: #0891b2;
    --ring: #1d4ed855;
    --border: #e6e9f4;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: radial-gradient(1200px 600px at 80% -10%, #1a2140 0%, transparent 60%) no-repeat,
                radial-gradient(900px 500px at -10% 10%, #0f1733 0%, transparent 60%) no-repeat,
                var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container { width: min(1100px, 92%); margin: 0 auto; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(140%) blur(8px); background: color-mix(in oklab, var(--bg), transparent 70%); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.2px; }
.brand__logo { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); box-shadow: var(--shadow); }
.brand__text { font-weight: 800; }
.nav__links { display: flex; align-items: center; gap: 8px; list-style: none; margin: 0; padding: 0; }
.nav__links a, .nav__links button { color: var(--text); text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.nav__links a:hover { background: var(--surface); }
.nav__toggle { display: none; }

/* Hero */
.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; align-items: center; padding: 56px 0 32px; }
.hero__subtitle { color: var(--muted); margin-top: -8px; }
.hero__summary { color: var(--muted); max-width: 60ch; }
.hero__actions { display: flex; gap: 10px; margin-top: 14px; }
.hero__media { display: grid; place-items: center; }
.avatar { width: 260px; height: 260px; border-radius: 24px; object-fit: cover; object-position: center top; border: 3px solid color-mix(in oklab, var(--primary), white 10%); box-shadow: var(--shadow); }

/* Sections */
.section { padding: 40px 0; }
.section__title { font-size: 28px; margin: 0 0 10px; }
.section__content { display: grid; gap: 10px; }

/* Cards & Grids */
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.grid--2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.card { background: linear-gradient(180deg, color-mix(in oklab, var(--surface), white 4%), var(--surface)); border: 1px solid var(--border); border-radius: 14px; padding: 14px; box-shadow: var(--shadow); }
.card__header { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.card__title { margin: 0; font-size: 18px; }
.card__meta { color: var(--muted); font-size: 13px; }
.card__list { margin: 10px 0 0; padding-left: 18px; }
.card__actions { display: flex; gap: 8px; margin-top: 8px; }


/* Timeline rail accent */
.timeline { display: grid; gap: 10px; position: relative; }
.timeline::before { content: ""; position: absolute; left: -14px; top: 6px; bottom: 6px; width: 3px; background: linear-gradient(var(--primary), var(--accent)); border-radius: 3px; }
.timeline .card { position: relative; }
.timeline .card::before { content: ""; position: absolute; left: -22px; top: 16px; width: 16px; height: 16px; border-radius: 50%; background: var(--surface); border: 3px solid var(--primary); box-shadow: var(--shadow); }

/* Lists & Tags */
.contact-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.contact-list li { display: grid; grid-template-columns: 140px 1fr; align-items: center; gap: 6px 10px; }
.contact-list .label { color: var(--muted); font-size: 13px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 8px 0 0; }
.tags li { padding: 6px 8px; border-radius: 999px; background: color-mix(in oklab, var(--surface), white 4%); border: 1px solid var(--border); font-size: 13px; }

/* Form */
label { display: grid; gap: 6px; }
input, textarea { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: color-mix(in oklab, var(--surface), white 3%); color: var(--text); outline: none; box-shadow: inset 0 0 0 1px transparent, 0 0 0 0 transparent; transition: box-shadow .15s ease; }
input:focus, textarea:focus { box-shadow: 0 0 0 3px var(--ring); }
.contact__actions { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.contact__note { color: var(--muted); font-size: 13px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; height: 38px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--border); color: var(--text); text-decoration: none; cursor: pointer; background: color-mix(in oklab, var(--surface), white 4%); }
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn--primary { background: linear-gradient(180deg, color-mix(in oklab, var(--primary), white 10%), var(--primary)); border-color: color-mix(in oklab, var(--primary), black 20%); }
.btn--primary:hover { background: linear-gradient(180deg, color-mix(in oklab, var(--primary), white 16%), var(--primary-700)); }
.btn--secondary { background: linear-gradient(180deg, color-mix(in oklab, var(--accent), white 10%), var(--accent)); border-color: color-mix(in oklab, var(--accent), black 20%); }
.btn--ghost { background: transparent; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 20px; }
.site-footer__inner { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; color: var(--muted); }
.back-to-top { color: var(--muted); text-decoration: none; }
.back-to-top:hover { color: var(--text); }

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.8s ease-out, visibility 0.8s ease-out;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.loading-name {
    font-size: clamp(24px, 4vw, 42px);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0 0 30px 0;
    animation: nameFlash 1.5s ease-in-out infinite;
}

.skills-display {
    margin-bottom: 30px;
}

.skills-label {
    display: block;
    font-size: 16px;
    color: var(--muted);
    margin-bottom: 10px;
    font-weight: 500;
}

.skills-rotator {
    position: relative;
    height: 30px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-item {
    position: absolute;
    width: 100%;
    text-align: center;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    opacity: 0;
    transform: translateY(20px);
    animation: skillRotate 36s infinite;
    line-height: 1.3;
    padding: 0 10px;
}

/* Animation delays are set dynamically in JavaScript for random order */

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

/* Animations */
@keyframes nameFlash {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
        filter: brightness(1);
    }
    50% {
        opacity: 0.3;
        transform: scale(1.05);
        filter: brightness(1.5);
    }
}

@keyframes skillRotate {
    0%, 5.56% {
        opacity: 0;
        transform: translateY(20px);
    }
    5.57%, 11.11% {
        opacity: 1;
        transform: translateY(0);
    }
    11.12%, 100% {
        opacity: 0;
        transform: translateY(-20px);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Typography */
h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.06; margin: 0; }
h2 { font-size: 22px; }
p { margin: 0; }
a { color: var(--primary); }



/* Responsive */
@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; text-align: center; }
    .hero__media { order: -1; }
}
@media (max-width: 720px) {
    .grid { grid-template-columns: 1fr; }
    .grid--2 { grid-template-columns: 1fr; }
    .timeline::before, .timeline .card::before { display: none; }
    .nav__toggle { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text); }
    .nav__links { position: absolute; right: 4%; top: 58px; flex-direction: column; align-items: flex-start; background: var(--surface); padding: 10px; border: 1px solid var(--border); border-radius: 12px; display: none; }
    .nav__links[aria-expanded="true"] { display: flex; }
    .contact-list li { grid-template-columns: 1fr; align-items: start; }
}