:root {
    --bg: #f5f6f7;
    --surface: #ffffff;
    --text: #1a1a1a;
    --muted: #6b7280;
    --border: #e5e7eb;

    --yellow: #facc15;
    --orange: #f97316;
    --red: #ef4444;
    --yellow-light: #fef9c3;

    --shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.55;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding-top: 16px;
    padding-bottom: 16px;
}

.brand {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-size: 16px;
    font-weight: 700;
}

.brand-role {
    font-size: 12px;
    color: var(--muted);
}

.nav {
    display: flex;
    gap: 22px;
    font-size: 14px;
}

.nav a {
    color: var(--muted);
    transition: color 0.15s;
}

.nav a:hover {
    color: var(--orange);
}

/* Hero */
.hero {
    padding: 88px 0 72px;
    background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border);
}

.eyebrow {
    display: inline-block;
    margin: 0 0 20px;
    padding: 6px 12px;
    background: var(--yellow-light);
    color: #854d0e;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 999px;
}

.hero h1 {
    max-width: 800px;
    margin: 0;
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-text {
    max-width: 640px;
    margin: 20px 0 0;
    font-size: 18px;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 170px;
    padding: 13px 22px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    transition: transform 0.1s, box-shadow 0.15s, background 0.15s;
}

.btn-primary {
    background: var(--orange);
    color: #fff;
    box-shadow: 0 6px 18px rgba(249, 115, 22, 0.25);
}

.btn-primary:hover {
    background: #ea580c;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--orange);
    color: var(--orange);
}

.hero-facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.hero-facts span {
    display: block;
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.hero-facts strong {
    font-size: 15px;
    font-weight: 600;
}

/* Sections */
.section {
    padding: 72px 0;
}

.section h2 {
    margin: 0;
    font-size: 32px;
    letter-spacing: -0.02em;
}

.section-lead {
    margin: 10px 0 40px;
    color: var(--muted);
    font-size: 17px;
    max-width: 640px;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 26px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.15s, box-shadow 0.2s, border-color 0.15s;
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    border-color: var(--orange);
}

.project-tag {
    align-self: flex-start;
    margin-bottom: 14px;
    padding: 5px 10px;
    background: var(--yellow-light);
    color: #854d0e;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 6px;
}

.project-preview {
    width: 100%;
    height: 180px;
    margin-bottom: 16px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg);
    border: 1px solid var(--border);
}

.project-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top left;
    display: block;
    transition: transform 0.3s;
}

.project-card:hover .project-preview img {
    transform: scale(1.03);
}
.project-card h3 {
    margin: 0 0 10px;
    font-size: 18px;
    line-height: 1.3;
}

.project-card p {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 14px;
}

.project-features {
    list-style: none;
    margin: 0 0 22px;
    padding: 0;
    flex: 1;
}

.project-features li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 14px;
    color: #374151;
}

.project-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--orange);
    font-weight: 700;
}

.project-link {
    display: inline-block;
    color: var(--orange);
    font-weight: 600;
    font-size: 14px;
    transition: color 0.15s;
}

.project-link:hover {
    color: var(--red);
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.skill-group {
    padding: 22px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.skill-group h3 {
    margin: 0 0 14px;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--orange);
}

.skill-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.skill-group li {
    padding: 6px 0;
    font-size: 14px;
    border-bottom: 1px dashed var(--border);
}

.skill-group li:last-child {
    border-bottom: 0;
}

/* Process */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.process-step {
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.step-num {
    display: block;
    margin-bottom: 14px;
    font-size: 28px;
    font-weight: 800;
    color: var(--yellow);
    letter-spacing: -0.02em;
}

.process-step h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.process-step p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

/* Contacts */
.section-contacts {
    background: #ffffff;
    border-top: 1px solid var(--border);
}

.contacts-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.contact-card {
    display: block;
    padding: 22px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.15s, transform 0.15s;
}

.contact-card:hover {
    border-color: var(--orange);
    transform: translateY(-2px);
}

.contact-label {
    display: block;
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.contact-value {
    font-size: 15px;
    font-weight: 600;
}

/* Footer */
.site-footer {
    padding: 28px 0;
    background: #111827;
    color: #9ca3af;
    font-size: 13px;
}

.site-footer p {
    margin: 0;
    text-align: center;
}

/* Responsive */
@media (max-width: 900px) {
    .projects-grid,
    .skills-grid,
    .process-steps,
    .contacts-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero-facts {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .nav {
        display: none;
    }
}

@media (max-width: 600px) {
    .projects-grid,
    .skills-grid,
    .process-steps,
    .contacts-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 56px 0 48px;
    }

    .btn {
        width: 100%;
    }
}