:root {
    --bg: #0f1419;
    --bg-alt: #131a22;
    --card: #1a2332;
    --card-hover: #1f2a3a;
    --text: #e7ecf3;
    --text-secondary: #a0aec0;
    --muted: #6b7a8d;
    --accent: #3dd68c;
    --accent-hover: #2fb872;
    --accent-glow: rgba(61, 214, 140, 0.15);
    --border: #2a3544;
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

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

/* ─── NAV ────────────────────────────────────────────────────── */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 4rem;
}

.nav-brand {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
}

.nav-dot { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-links a:hover { color: var(--accent); text-decoration: none; }

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switcher {
    display: flex;
    gap: 2px;
    background: var(--card);
    border-radius: 6px;
    padding: 2px;
}

.lang-btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    transition: all var(--transition);
}

.lang-btn.active {
    background: var(--accent);
    color: #0f1419;
}

.lang-btn:hover:not(.active) { color: var(--text); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ─── BUTTONS ────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #0f1419;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #0f1419;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent);
}

.btn-ghost:hover {
    background: var(--accent-glow);
    color: var(--accent);
    transform: translateY(-1px);
}

.btn-full { width: 100%; }

/* ─── HERO ───────────────────────────────────────────────────── */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 1.5rem 4rem;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
        var(--bg);
}

.hero-inner {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-greeting {
    color: var(--accent);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.hero-title {
    font-size: 1.4rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 480px;
    margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* terminal card */
.terminal-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.terminal-dots {
    display: flex;
    gap: 6px;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.terminal-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
}

.terminal-dots span:first-child { background: #f07178; }
.terminal-dots span:nth-child(2) { background: #f0c674; }
.terminal-dots span:last-child { background: var(--accent); }

.terminal-code {
    padding: 1.25rem;
    font-family: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
    font-size: 0.85rem;
    line-height: 1.8;
    overflow-x: auto;
}

.t-prompt { color: var(--accent); }
.t-cmd { color: var(--text); font-weight: 600; }
.t-out { color: var(--text-secondary); }
.t-accent { color: var(--accent); }
.t-cursor { animation: blink 1s step-end infinite; }

@keyframes blink {
    50% { opacity: 0; }
}

/* ─── SECTIONS ───────────────────────────────────────────────── */

.section { padding: 6rem 1.5rem; }
.section:nth-child(even) { background: var(--bg-alt); }

.section-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-lead {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
}

/* ─── ABOUT ──────────────────────────────────────────────────── */

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.about-text strong { color: var(--accent); font-weight: 600; }

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: var(--accent);
    background: var(--card-hover);
    transform: translateY(-2px);
}

.stat-number {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ─── SKILLS ─────────────────────────────────────────────────── */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.skill-group {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
}

.skill-group:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.skill-group h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.skill-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    font-size: 0.7rem;
    font-weight: 800;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 6px;
    flex-shrink: 0;
}

.skill-group ul {
    list-style: none;
}

.skill-group li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.3rem 0;
    padding-left: 1rem;
    position: relative;
}

.skill-group li::before {
    content: "›";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* ─── PROJECTS ───────────────────────────────────────────────── */

.project-showcase {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.project-header {
    padding: 2.5rem 2.5rem 1.5rem;
}

.project-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.project-badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

.project-badge-dot.live { animation: pulse 2s infinite; }

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); }
    50% { opacity: 0.7; box-shadow: 0 0 0 8px transparent; }
}

.project-name {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.project-tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.project-gallery {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 1rem;
    padding: 0 2.5rem;
}

.project-card {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    aspect-ratio: 16/10;
}

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

.project-card-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(transparent, rgba(15, 20, 25, 0.9));
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
}

.project-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2.5rem;
}

.project-details h4 {
    color: var(--accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.project-details p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.project-tech {
    padding: 0 2.5rem 2rem;
}

.project-tech h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tags span {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 20px;
    border: 1px solid rgba(61, 214, 140, 0.2);
}

.project-features {
    padding: 0 2.5rem 2rem;
}

.project-features h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.feature-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 0.7rem;
    font-weight: 800;
    background: var(--bg);
    color: var(--accent);
    border-radius: 8px;
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
}

.project-cta {
    display: flex;
    gap: 1rem;
    padding: 2rem 2.5rem 2.5rem;
    border-top: 1px solid var(--border);
}

/* ─── SERVICES ───────────────────────────────────────────────── */

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    font-size: 0.85rem;
    font-weight: 800;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ─── CONTACT ────────────────────────────────────────────────── */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    font-size: 1rem;
    font-weight: 800;
    background: var(--card);
    color: var(--accent);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 0.15rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--card);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition);
    outline: none;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    font-size: 0.95rem;
    color: var(--muted);
    pointer-events: none;
    transition: all var(--transition);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.6rem;
    left: 0.75rem;
    font-size: 0.75rem;
    background: var(--bg);
    padding: 0 0.25rem;
    color: var(--accent);
}

.section:nth-child(even) .form-group input:focus + label,
.section:nth-child(even) .form-group input:not(:placeholder-shown) + label,
.section:nth-child(even) .form-group textarea:focus + label,
.section:nth-child(even) .form-group textarea:not(:placeholder-shown) + label {
    background: var(--bg-alt);
}

/* ─── FOOTER ─────────────────────────────────────────────────── */

.footer {
    border-top: 1px solid var(--border);
    padding: 2rem 1.5rem;
}

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

.footer p { color: var(--muted); font-size: 0.9rem; }

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--muted);
    font-size: 0.85rem;
}

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

/* ─── ANIMATIONS ─────────────────────────────────────────────── */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─── RESPONSIVE ─────────────────────────────────────────────── */

@media (max-width: 900px) {
    .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero { min-height: auto; padding: 7rem 1.5rem 4rem; }
    .about-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr 1fr; }
    .project-gallery { grid-template-columns: 1fr; }
    .project-details { grid-template-columns: 1fr; }
    .feature-list { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .project-header,
    .project-details,
    .project-tech,
    .project-features,
    .project-cta { padding-left: 1.5rem; padding-right: 1.5rem; }
    .project-gallery { padding: 0 1.5rem; }
}

@media (max-width: 640px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 4rem;
        left: 0;
        right: 0;
        background: var(--card);
        border-bottom: 1px solid var(--border);
        padding: 1rem 1.5rem;
        gap: 0.75rem;
    }
    .nav-toggle { display: flex; }
    .hero-name { font-size: 2.5rem; }
    .skills-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr 1fr; }
    .section { padding: 4rem 1rem; }
    .section-title { font-size: 1.6rem; }
    .footer-inner { flex-direction: column; gap: 0.75rem; text-align: center; }
}