/* Theme */
:root[data-theme="dark"] {
    --bg: #080b12;
    --bg-elevated: #0f1420;
    --bg-card: rgba(18, 24, 38, 0.72);
    --text: #e8edf7;
    --text-muted: #8b95a8;
    --accent: #3dd6c6;
    --accent-dim: rgba(61, 214, 198, 0.15);
    --accent-hover: #5ce8d9;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(61, 214, 198, 0.35);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    --nav-bg: rgba(8, 11, 18, 0.82);
    --glow-1: rgba(61, 214, 198, 0.12);
    --glow-2: rgba(99, 130, 255, 0.1);
}

:root[data-theme="light"] {
    --bg: #f0f4f8;
    --bg-elevated: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.9);
    --text: #121826;
    --text-muted: #5a6478;
    --accent: #0d9488;
    --accent-dim: rgba(13, 148, 136, 0.12);
    --accent-hover: #0f766e;
    --border: rgba(18, 24, 38, 0.1);
    --border-strong: rgba(13, 148, 136, 0.4);
    --shadow: 0 12px 32px rgba(18, 24, 38, 0.08);
    --nav-bg: rgba(255, 255, 255, 0.9);
    --glow-1: rgba(13, 148, 136, 0.08);
    --glow-2: rgba(59, 130, 246, 0.06);
}

.mono {
    font-family: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "DM Sans", system-ui, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    padding-bottom: 2.5rem;
}

body.is-loading {
    overflow: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
}

/* Background */
.page-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 75%);
    opacity: 0.5;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.glow-1 {
    width: 420px;
    height: 420px;
    top: -120px;
    left: 10%;
    background: var(--glow-1);
}

.glow-2 {
    width: 360px;
    height: 360px;
    top: 40%;
    right: -80px;
    background: var(--glow-2);
}

/* Loader */
.loader {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.loader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-inner {
    width: min(280px, 80vw);
    text-align: center;
}

.loader-label {
    display: block;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.loader-bar {
    height: 3px;
    background: var(--border);
    border-radius: 99px;
    overflow: hidden;
}

.loader-bar-fill {
    display: block;
    height: 100%;
    width: 0;
    background: var(--accent);
    border-radius: inherit;
    animation: loadBar 0.9s ease forwards;
}

@keyframes loadBar {
    to {
        width: 100%;
    }
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar {
    backdrop-filter: blur(12px);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--text);
}

.logo-text {
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 0.45rem 0.85rem;
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--accent);
    background: var(--accent-dim);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
    border-color: var(--border-strong);
    color: var(--accent);
}

:root[data-theme="dark"] .theme-icon-light,
:root[data-theme="light"] .theme-icon-dark {
    display: none;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    border: none;
    background: transparent;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.mobile-menu-btn.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.is-open span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem 1.5rem 1rem;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.mobile-menu[hidden] {
    display: none;
}

.mobile-menu a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 0.6rem 0.5rem;
    border-radius: 8px;
}

.mobile-menu a:hover {
    color: var(--accent);
}

/* Hero */
.hero-section {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 7rem 1.5rem 4rem;
}

.hero-content {
    max-width: 720px;
    text-align: center;
}

.hero-eyebrow {
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 1rem;
}

.hero-content h1 {
    font-size: clamp(2.75rem, 8vw, 4.25rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    line-height: 1.05;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin: 0 auto 1.75rem;
    max-width: 540px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.skill-tag {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
}

.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
    animation: pulse 2s ease infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.45;
    }
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.75rem;
}

.hero-social {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

.social-link {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s, transform 0.2s;
}

.social-link:hover {
    color: var(--accent);
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--accent);
    color: #041210;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--border-strong);
}

.btn-secondary:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

.btn-ghost {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid var(--border-strong);
}

/* Main layout */
.container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem 4rem;
}

.section-header {
    margin-bottom: 2rem;
}

.section-eyebrow {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin: 0 0 0.35rem;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

/* Hub cards */
.hub-section {
    margin-bottom: 4rem;
}

.hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.hub-card {
    padding: 1.35rem;
    border-radius: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    backdrop-filter: blur(8px);
    transition: border-color 0.25s, transform 0.25s;
}

.hub-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-3px);
}

.hub-card-accent {
    border-color: var(--border-strong);
    background: linear-gradient(145deg, var(--bg-card), var(--accent-dim));
}

.hub-label {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 0 0 0.5rem;
}

.hub-card h3 {
    margin: 0 0 0.4rem;
    font-size: 1.15rem;
}

.hub-card p {
    margin: 0 0 1rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.hub-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.hub-link i {
    font-size: 0.75rem;
    transition: transform 0.2s;
}

.hub-card:hover .hub-link i {
    transform: translateX(3px);
}

/* About */
.about-section {
    margin-bottom: 4.5rem;
}

.about-panel {
    padding: 1.75rem;
    border-radius: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    backdrop-filter: blur(8px);
}

.about-panel p {
    margin: 0 0 1rem;
    color: var(--text-muted);
}

.about-panel p:last-of-type {
    margin-bottom: 1.5rem;
}

.about-facts {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    font-size: 0.82rem;
}

.about-facts li {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    color: var(--text-muted);
}

.about-facts span {
    color: var(--accent);
    min-width: 4.5rem;
}

/* Featured */
.featured-section {
    margin-bottom: 4.5rem;
}

.featured-project {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    padding: 1.5rem;
    border-radius: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.featured-image img {
    border-radius: 12px;
    border: 1px solid var(--border);
}

.featured-content h3 {
    font-size: 1.6rem;
    margin: 0 0 0.75rem;
}

.featured-content p {
    color: var(--text-muted);
    margin: 0 0 1.25rem;
}

.featured-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding-top: 1rem;
}

/* Projects */
.projects-section {
    margin-bottom: 4.5rem;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.75rem;
}

.filter-btn {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    padding: 0.45rem 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-dim);
    color: var(--accent);
    border-color: var(--border-strong);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    border-radius: 14px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: transform 0.25s, border-color 0.25s, opacity 0.4s, box-shadow 0.25s;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}

.project-card.is-hidden {
    display: none;
}

.project-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-dim), var(--bg-elevated));
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

.project-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(4, 8, 14, 0.72);
    opacity: 0;
    transition: opacity 0.25s;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.overlay-btn {
    padding: 0.65rem 1.1rem;
    border-radius: 8px;
    background: var(--accent);
    color: #041210;
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    transition: transform 0.2s, background 0.2s;
}

.overlay-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.03);
}

.overlay-muted {
    background: var(--bg-card);
    color: var(--text-muted);
    border: 1px solid var(--border);
    cursor: default;
}

.project-content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 0.65rem;
}

.project-content h3 {
    margin: 0;
    font-size: 1.15rem;
}

.project-content p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    flex: 1;
}

.project-content code {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.82em;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    background: var(--accent-dim);
    color: var(--accent);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.25rem;
}

.tech-tag {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.03em;
    padding: 0.25rem 0.55rem;
    border-radius: 6px;
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid var(--border);
}

.project-links {
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

/* Footer */
.site-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: 2.5rem 1.5rem 3.5rem;
    margin-top: 2rem;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.footer-brand h3 {
    margin: 0 0 0.15rem;
    font-size: 1rem;
}

.footer-brand p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links a {
    text-decoration: none;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-social {
    display: flex;
    gap: 0.5rem;
}

.footer-copy {
    text-align: center;
    margin: 0;
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* Status bar */
.status-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem 0.75rem;
    padding: 0.45rem 1rem;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    background: var(--nav-bg);
    border-top: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.status-sep {
    opacity: 0.4;
}

#status-message {
    color: var(--accent);
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 3rem;
    right: 1.25rem;
    z-index: 998;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 10px;
    background: var(--accent);
    color: #041210;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.25s, visibility 0.25s, transform 0.25s, background 0.2s;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-hover);
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .logo-text {
        display: none;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-brand {
        flex-direction: column;
    }

    .footer-links {
        justify-content: center;
    }

    .status-bar {
        font-size: 0.62rem;
        padding-bottom: 0.55rem;
    }

    .back-to-top {
        bottom: 3.25rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}