:root {
    --bg-primary: #1c2028;
    --bg-secondary: #151920;
    --bg-card: #252a33;
    --bg-muted: #111419;
    --bg-elevated: #2e343f;
    --text-primary: #f0ece4;
    --text-secondary: #b8b0a3;
    --text-muted: #8a8278;
    --accent: #c4a265;
    --accent-light: #dbc48a;
    --accent-dark: #a8894a;
    --accent-soft: rgba(196, 162, 101, 0.1);
    --gradient-gold: linear-gradient(135deg, #dbc48a 0%, #c4a265 50%, #a8894a 100%);
    --border: rgba(196, 162, 101, 0.15);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
    --header-height: 72px;
    --transition: 0.3s ease;
    --radius: 8px;
    --radius-lg: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body {
    font-family: 'Vazirmatn', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: var(--accent-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
.container { width: min(1140px, 92%); margin-inline: auto; }

.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--header-height);
    background: rgba(21, 25, 32, 0.94);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.header.scrolled { background: rgba(21, 25, 32, 0.98); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 0.5rem; color: var(--text-primary); font-weight: 700; letter-spacing: -0.01em; }
.logo-icon { color: var(--accent); font-family: monospace; font-size: 1.2rem; }
.nav-menu { display: flex; align-items: center; gap: 0.25rem; list-style: none; }
.nav-link {
    display: block; padding: 0.5rem 1rem; color: var(--text-secondary);
    font-size: 0.88rem; font-weight: 500; border-radius: var(--radius);
    transition: all var(--transition); letter-spacing: 0.02em;
}
.nav-link:hover, .nav-link.active {
    color: var(--accent-light); background: var(--accent-soft);
}
.nav-link-cta {
    background: var(--accent) !important; color: #1a1a1a !important;
    margin-right: 0.5rem; font-weight: 600;
}
.nav-link-cta:hover { background: var(--accent-light) !important; color: #1a1a1a !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.85rem 2rem; border-radius: var(--radius); font-family: inherit;
    font-size: 0.9rem; font-weight: 600; cursor: pointer; border: 1px solid transparent;
    transition: all var(--transition); letter-spacing: 0.03em;
}
.btn-primary {
    background: var(--accent); color: #1a1a1a;
    border-color: var(--accent-dark);
}
.btn-primary:hover {
    background: var(--accent-light);
    box-shadow: 0 4px 20px rgba(196, 162, 101, 0.25);
    color: #1a1a1a;
}
.btn-outline {
    background: transparent; color: var(--text-primary);
    border-color: var(--border);
}
.btn-outline:hover {
    border-color: var(--accent); color: var(--accent-light);
    background: var(--accent-soft);
}
.btn-full { width: 100%; }

.hero {
    position: relative; min-height: 100vh; display: flex; align-items: center;
    padding-top: var(--header-height); overflow: hidden;
    background: var(--bg-secondary);
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 70% 50% at 50% 0%, rgba(196, 162, 101, 0.06), transparent),
        radial-gradient(ellipse 50% 40% at 90% 80%, rgba(255, 255, 255, 0.02), transparent);
    pointer-events: none;
}
.hero-content { position: relative; padding: 4rem 0 6rem; }
.hero-badge {
    display: inline-block; padding: 0.4rem 1.1rem;
    background: var(--accent-soft); border: 1px solid var(--border);
    border-radius: 4px; color: var(--accent-light);
    font-size: 0.8rem; font-weight: 500; margin-bottom: 1.5rem;
    letter-spacing: 0.08em; text-transform: uppercase;
}
.hero-title { font-size: clamp(2.2rem, 5vw, 3.5rem); font-weight: 700; line-height: 1.3; margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.gradient-text {
    background: var(--gradient-gold); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc { font-size: 1.05rem; color: var(--text-secondary); max-width: 580px; margin-bottom: 2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 2.5rem; padding-top: 2rem; border-top: 1px solid var(--border-subtle); }
.stat-number { display: block; font-size: 1.75rem; font-weight: 700; color: var(--accent); letter-spacing: -0.02em; }
.stat-label { font-size: 0.82rem; color: var(--text-muted); letter-spacing: 0.04em; }

.section { padding: 5rem 0; }
.section-header { text-align: center; max-width: 640px; margin: 0 auto 3rem; }
.section-tag {
    display: inline-block; color: var(--accent); font-size: 0.78rem; font-weight: 600;
    margin-bottom: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase;
}
.section-title { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 600; margin-bottom: 1rem; letter-spacing: -0.01em; }
.section-desc { color: var(--text-secondary); font-size: 1rem; }

.about { background: var(--bg-primary); }
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.about-card {
    background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
    padding: 1.75rem; transition: all var(--transition);
}
.about-card:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}
.about-icon { font-size: 1.75rem; margin-bottom: 1rem; opacity: 0.9; }
.about-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.about-card p { color: var(--text-secondary); font-size: 0.88rem; }

.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.service-card {
    background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
    padding: 2rem; transition: all var(--transition);
}
.service-card:hover { border-color: var(--border); box-shadow: var(--shadow-md); }
.service-icon { font-size: 2rem; margin-bottom: 1rem; opacity: 0.85; }
.service-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.75rem; }
.service-card p { color: var(--text-secondary); font-size: 0.88rem; }

.expertise { background: var(--bg-secondary); }
.expertise-tabs { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin-bottom: 2rem; }
.tab-btn {
    padding: 0.6rem 1.2rem; background: var(--bg-card); border: 1px solid var(--border-subtle);
    border-radius: var(--radius); color: var(--text-secondary); font-family: inherit;
    font-size: 0.85rem; cursor: pointer; transition: all var(--transition);
}
.tab-btn:hover, .tab-btn.active {
    background: var(--accent-soft); border-color: var(--border);
    color: var(--accent-light);
}
.expertise-panel { display: none; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.expertise-panel.active { display: grid; }
.expertise-content h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 1rem; }
.expertise-content ul { list-style: none; }
.expertise-content li {
    padding: 0.5rem 0; color: var(--text-secondary); font-size: 0.92rem;
    border-bottom: 1px solid var(--border-subtle);
}
.expertise-content li::before { content: '— '; color: var(--accent); }
.expertise-visual {
    background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
    padding: 2rem; min-height: 200px; display: flex; align-items: center; justify-content: center;
}
.visual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; width: 100%; }
.visual-grid span {
    background: var(--bg-elevated); border: 1px solid var(--border-subtle);
    border-radius: var(--radius); padding: 0.85rem; text-align: center; font-weight: 500;
    color: var(--accent-light); font-family: monospace; font-size: 0.85rem;
}

.process-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.25rem; }
.process-step {
    text-align: center; padding: 2rem 1.5rem;
    background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
}
.step-number {
    width: 44px; height: 44px; margin: 0 auto 1rem;
    background: var(--accent-soft); border: 1px solid var(--border);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem; color: var(--accent);
}
.process-step h3 { margin-bottom: 0.5rem; font-size: 1rem; font-weight: 600; }
.process-step p { color: var(--text-secondary); font-size: 0.86rem; }

.projects { background: var(--bg-secondary); }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.25rem; }
.project-card {
    background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
    padding: 1.75rem; transition: all var(--transition); display: flex; flex-direction: column;
}
.project-card:hover { border-color: var(--border); box-shadow: var(--shadow-md); }
.project-card-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.project-year {
    font-size: 0.72rem; font-weight: 600; color: var(--text-muted);
    background: var(--bg-elevated); padding: 0.2rem 0.55rem; border-radius: 4px;
    letter-spacing: 0.05em;
}
.project-category {
    display: inline-block; font-size: 0.72rem; font-weight: 600;
    color: var(--accent-light); background: var(--accent-soft);
    padding: 0.2rem 0.65rem; border-radius: 4px; letter-spacing: 0.04em;
}
.project-card h3 { font-size: 1.02rem; font-weight: 600; margin-bottom: 0.35rem; line-height: 1.45; }
.project-role { color: var(--accent); font-size: 0.8rem; font-weight: 500; margin-bottom: 0.5rem; }
.project-card > p:not(.project-role) { color: var(--text-secondary); font-size: 0.86rem; margin-bottom: 1rem; flex-grow: 1; }
.project-link {
    display: inline-block; margin-top: 0.75rem; font-size: 0.82rem; font-weight: 600;
    color: var(--accent-light); letter-spacing: 0.02em;
}
.project-link:hover { color: var(--accent); }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tech-tag {
    font-size: 0.72rem; padding: 0.2rem 0.55rem;
    background: var(--bg-elevated); border: 1px solid var(--border-subtle);
    border-radius: 4px; color: var(--text-muted); font-family: monospace;
}

.tech-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }
.tech-item {
    padding: 0.55rem 1.1rem; background: var(--bg-card); border: 1px solid var(--border-subtle);
    border-radius: var(--radius); font-size: 0.85rem; font-weight: 500;
    transition: all var(--transition); color: var(--text-secondary);
}
.tech-item:hover { border-color: var(--border); color: var(--accent-light); background: var(--accent-soft); }

.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.contact-info .section-title { text-align: right; }
.contact-info > p { color: var(--text-secondary); margin-bottom: 2rem; }
.contact-details { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-item { display: flex; align-items: center; gap: 1rem; }
.contact-icon { font-size: 1.4rem; opacity: 0.8; }
.contact-item strong { display: block; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 0.15rem; letter-spacing: 0.04em; }
.contact-form-wrapper {
    background: var(--bg-card); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg); padding: 2rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.82rem; font-weight: 500; margin-bottom: 0.4rem; color: var(--text-muted); letter-spacing: 0.03em; }
.form-input {
    width: 100%; padding: 0.75rem 1rem; background: var(--bg-elevated);
    border: 1px solid var(--border-subtle); border-radius: var(--radius);
    color: var(--text-primary); font-family: inherit; font-size: 0.92rem;
    transition: border-color var(--transition);
}
.form-input:focus { outline: none; border-color: var(--accent); background: var(--bg-muted); }
.form-textarea { resize: vertical; min-height: 120px; }
.form-error { display: block; color: #c97070; font-size: 0.8rem; margin-top: 0.25rem; }
.alert { padding: 0.85rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: 0.88rem; }
.alert-success {
    background: rgba(196, 162, 101, 0.1); border: 1px solid var(--border); color: var(--accent-light);
}

.footer {
    background: var(--bg-muted); border-top: 1px solid var(--border-subtle); padding: 2.5rem 0;
}
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.footer-brand { display: flex; align-items: center; gap: 0.75rem; }
.footer-brand p { color: var(--text-muted); font-size: 0.82rem; margin-top: 0.15rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--text-secondary); font-size: 0.88rem; }
.footer-links a:hover { color: var(--accent-light); }
.footer-copy { text-align: left; }
.footer-copy p { color: var(--text-muted); font-size: 0.78rem; }
.footer-note { color: var(--accent) !important; font-family: monospace; margin-top: 0.25rem; font-size: 0.82rem; }

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed; top: var(--header-height); right: -100%; width: 80%; max-width: 320px;
        height: calc(100vh - var(--header-height)); background: var(--bg-card);
        flex-direction: column; align-items: stretch; padding: 1.5rem; gap: 0.5rem;
        border-left: 1px solid var(--border-subtle); transition: right var(--transition);
        box-shadow: var(--shadow-md);
    }
    .nav-menu.open { right: 0; }
    .nav-link { padding: 0.75rem 1rem; }
    .expertise-panel.active { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; text-align: center; }
    .footer-copy { text-align: center; }
    .hero-stats { gap: 1.5rem; }
}