/* ============================
   Gasy-Ark — Site Vitrine
   ============================ */

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --color-primary: #0a5c7a;
    --color-primary-dark: #074459;
    --color-accent: #f0a500;
    --color-dark: #0f1c2e;
    --color-text: #2a2a2a;
    --color-text-light: #5a6a78;
    --color-bg: #ffffff;
    --color-bg-alt: #f4f7fa;
    --color-border: #e2e8f0;
    --radius: 12px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
    --transition: 0.3s ease;
    --max-width: 1140px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: 80px 0; }
.section-dark { background: var(--color-dark); color: #cdd8e4; }

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--color-dark);
}
.section-dark .section-title { color: #fff; }

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: 48px;
    font-size: 1.1rem;
}

/* ============================ Header ============================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -1px;
}
.logo-dot { color: var(--color-accent); }

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-dark);
}

/* Nav */
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}
.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition);
    position: relative;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}
.nav-cta {
    background: var(--color-primary);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 8px;
    transition: background var(--transition) !important;
}
.nav-cta:hover { background: var(--color-primary-dark); }

/* Mobile nav */
.nav-toggle { display: none; }
.nav-toggle-label {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle-label span {
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

@media (max-width: 768px) {
    .nav-toggle-label { display: flex; }
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: #fff;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform var(--transition);
    }
    .nav-toggle:checked ~ .nav-links { transform: translateY(0); }
}

/* ============================ Hero ============================ */
.hero {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: 100px 0 120px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(240,165,0,0.08), transparent 70%);
}

.hero-content { max-width: 720px; position: relative; z-index: 1; }

.hero-eyebrow {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: 16px;
    font-weight: 600;
}

.hero h1 {
    font-size: 2.6rem;
    line-height: 1.25;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: #b0c4d8;
    margin-bottom: 36px;
    max-width: 600px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================ Buttons ============================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--color-accent);
    color: var(--color-dark);
}
.btn-primary:hover { background: #e09800; transform: translateY(-2px); }
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ============================ Services Preview ============================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.service-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: all var(--transition);
}
.service-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.service-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--color-dark);
}

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

/* ============================ Stats ============================ */
.stats { padding: 60px 0; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}
.stat-number {
    display: block;
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 8px;
}
.stat-label {
    font-size: 0.95rem;
    color: #a0b0c0;
}

/* ============================ CTA ============================ */
.cta { background: var(--color-bg-alt); text-align: center; }
.cta-inner { max-width: 600px; }
.cta h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: var(--color-dark);
}
.cta p {
    color: var(--color-text-light);
    margin-bottom: 28px;
}

/* ============================ Page Banner ============================ */
.page-banner {
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: 64px 0;
    text-align: center;
}
.page-banner h1 { font-size: 2.4rem; margin-bottom: 8px; }
.page-banner p { color: #b0c4d8; font-size: 1.1rem; }

/* ============================ Services Detail ============================ */
.service-detail-block {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    margin-bottom: 56px;
    padding-bottom: 56px;
    border-bottom: 1px solid var(--color-border);
}
.service-detail-block:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.service-detail-block.alt { flex-direction: row-reverse; }

.service-detail-icon {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    border-radius: var(--radius);
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.service-detail-content h2 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--color-dark);
}
.service-detail-content > p {
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.service-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 8px;
}
.service-features li {
    position: relative;
    padding-left: 24px;
    color: var(--color-text);
    font-size: 0.95rem;
}
.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

@media (max-width: 768px) {
    .service-detail-block,
    .service-detail-block.alt { flex-direction: column; }
}

/* ============================ About ============================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}
.about-text h2,
.about-values h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--color-dark);
}
.about-text p { color: var(--color-text-light); margin-bottom: 16px; }

.value-item {
    margin-bottom: 24px;
    padding-left: 16px;
    border-left: 3px solid var(--color-accent);
}
.value-item h3 { font-size: 1.1rem; margin-bottom: 6px; color: var(--color-dark); }
.value-item p { color: var(--color-text-light); font-size: 0.95rem; }

@media (max-width: 768px) {
    .about-grid { grid-template-columns: 1fr; }
}

/* ============================ Sectors ============================ */
.sectors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
}
.sector-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 32px 28px;
    text-align: center;
}
.sector-icon { font-size: 2.5rem; margin-bottom: 16px; }
.sector-card h3 { font-size: 1.2rem; margin-bottom: 10px; color: #fff; }
.sector-card p { color: #a0b0c0; font-size: 0.95rem; }

/* ============================ Contact ============================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
}
.contact-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-item h3 { font-size: 1rem; color: var(--color-dark); margin-bottom: 4px; }
.contact-item p { color: var(--color-text-light); font-size: 0.95rem; }

.contact-form-wrap h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--color-dark);
}

.contact-form {
    background: var(--color-bg-alt);
    padding: 32px;
    border-radius: var(--radius);
}

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--color-dark);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10,92,122,0.1);
}
.form-group textarea { resize: vertical; }

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
}

/* ============================ Footer ============================ */
.site-footer {
    background: var(--color-dark);
    color: #a0b0c0;
    padding: 48px 0 32px;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand p { font-size: 0.9rem; }

.footer-nav {
    display: flex;
    gap: 24px;
}
.footer-nav a {
    color: #a0b0c0;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}
.footer-nav a:hover { color: #fff; }

.footer-copy {
    width: 100%;
    text-align: center;
    font-size: 0.85rem;
    color: #607080;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

/* ============================ Responsive ============================ */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1rem; }
    .section-title { font-size: 1.6rem; }
    .page-banner h1 { font-size: 1.8rem; }
    .footer-inner { flex-direction: column; text-align: center; }
}