/* Fonts */
@font-face {
    font-family: "JetBrains Sans";
    src: url("fonts/JetBrainsSans-Regular.woff2") format("woff2");
    font-weight: 300 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "JetBrains Mono";
    src: url("fonts/JetBrainsMono-Regular.woff2") format("woff2");
    font-weight: 400 700;
    font-style: normal;
    font-display: swap;
}

/* Design tokens */
:root {
    --bg: #0b0c10;
    --panel: #15171d;
    --text: #e6e8ef;
    --muted: #a8acb9;
    --link: #7cc8ff;
    --link-hover: #a5d9ff;
    --primary: #4da3ff;
    --primary-weak: rgba(77, 163, 255, 0.18);
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;

    --space-1: 6px;
    --space-2: 10px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 36px;
    --space-6: 56px;

    --container: 1100px;
}

/* Global reset-ish */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "JetBrains Sans", Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: radial-gradient(1200px 600px at 70% -10%, rgba(77, 163, 255, 0.12), transparent 60%),
    radial-gradient(900px 600px at -10% 20%, rgba(32, 201, 151, 0.08), transparent 60%),
    var(--bg);
    line-height: 1.6;
}

/* Layout */
#app {
    max-width: var(--container);
    margin: 0 auto;
    padding: clamp(16px, 3vw, 32px);
}

header.logo {
    padding: var(--space-4) 0 var(--space-3);
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography */
h1,
h2,
h3 {
    margin: 0 0 var(--space-3);
    line-height: 1.2;
}

h1.title {
    font-weight: 400;
    font-size: clamp(28px, 4vw, 40px);
    letter-spacing: 0.2px;
    text-align: left;
    margin-bottom: var(--space-4);
}

h2 {
    font-weight: 500;
    font-size: clamp(22px, 3vw, 28px);
}

h3 {
    font-weight: 500;
    font-size: 18px;
}

p {
    margin: 0 0 var(--space-3);
    color: var(--text);
    opacity: 0.95;
}

small,
.meta {
    color: var(--muted);
}

/* Navigation menu */
.menu {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
    background: linear-gradient(to right, rgba(17, 19, 25, 0.85), rgba(17, 19, 25, 0.65));
    border-bottom: 1px solid var(--border);
    margin: 0 calc(-1 * clamp(16px, 3vw, 32px)) var(--space-5);
    padding: 10px clamp(16px, 3vw, 32px);
}

.nav {
    list-style: none;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
}

.nav a {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--text);
    text-decoration: none;
    border: 1px solid transparent;
    transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.nav a:hover,
.nav a:focus-visible {
    background-color: rgba(77, 163, 255, 0.08);
    border-color: var(--primary-weak);
    outline: none;
}

a {
    color: var(--link);
    text-decoration: none;
}

img {
    display: block;
    margin: auto;
    width: 10%;
}

a:hover,
a:focus-visible {
    color: var(--link-hover);
    text-decoration: underline;
    outline: none;
}

/* Sections */
.section {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 60%), var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(16px, 3vw, 28px);
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow);
}

/* About */
#about p {
    max-width: 70ch;
}

/* Experience timeline */
.timeline {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

.timeline li {
    position: relative;
    padding: 0 0 var(--space-4) 28px;
    border-left: 2px solid var(--primary-weak);
}

.timeline li:last-child {
    padding-bottom: 0;
}

.timeline li::before {
    content: "";
    position: absolute;
    left: -7px;
    top: 2px;
    width: 12px;
    height: 12px;
    background: radial-gradient(circle at 35% 35%, #bfe0ff, #5aaeff);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(77, 163, 255, 0.15);
}

.timeline .meta {
    display: inline-block;
    margin: 6px 0 8px;
    font-size: 14px;
}

/* Projects grid */
.grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.card {
    grid-column: span 12;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 55%), #121319;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-weak);
    box-shadow: 0 10px 30px rgba(77, 163, 255, 0.12);
}

.card h3 {
    margin-bottom: 8px;
}

.card p {
    margin-bottom: 8px;
}

.card a {
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 14px;
    text-decoration: none;
    border-bottom: 1px dashed var(--primary-weak);
}

.card a:hover,
.card a:focus-visible {
    border-bottom-style: solid;
}

/* 2 or 3 columns on larger screens */
@media (min-width: 680px) {
    .card {
        grid-column: span 6;
    }
}
@media (min-width: 980px) {
    .card {
        grid-column: span 4;
    }
}

/* Skills */
.skills {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 16px;
}

@media (min-width: 720px) {
    .skills {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.skills li {
    padding: 10px 12px;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.02);
}

/* Contact */
.contact {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-3);
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
}

.contact a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    text-decoration: none;
}

.contact a:hover,
.contact a:focus-visible {
    border-color: var(--primary-weak);
    background: rgba(77, 163, 255, 0.08);
}

/* Back to top link */
.back-to-top {
    display: inline-block;
    margin-top: 8px;
    font-size: 14px;
}

/* Footer */
footer.technologies {
    margin: var(--space-6) auto var(--space-5);
    text-align: center;
    opacity: 0.85;
}

footer.technologies img {
    max-width: min(100%, 780px);
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 6px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    .card {
        transition: none;
    }
}