/* ═══════════════════════════════════════════════ */
/* Atlas & Stone Architects — Design System        */
/* ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=DM+Sans:ital,wght@0,400;0,500;0,600;1,400&display=swap');

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

:root {
    --black: #0A0A0A;
    --charcoal: #1A1A1A;
    --dark-grey: #2A2A2A;
    --medium-grey: #666;
    --light-grey: #999;
    --off-white: #F5F3F0;
    --white: #FAFAF8;
    --gold: #C4A35A;
    --gold-light: #D4B76A;
    --gold-dark: #A88A40;
    --border: rgba(255,255,255,0.08);
    --border-light: rgba(0,0,0,0.08);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', -apple-system, sans-serif;
    background: var(--white);
    color: var(--charcoal);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: 'Outfit', sans-serif; }

/* ═══ Navigation ═══ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 48px;
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: padding 0.4s;
}
.nav.compact { padding: 14px 48px; }

.nav-logo {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}
.nav-logo span { color: var(--gold); font-weight: 300; }

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}
.nav-links a {
    text-decoration: none;
    color: rgba(255,255,255,0.6);
    font-family: 'Outfit', sans-serif;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color 0.3s;
    position: relative;
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold); }
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 1.5px;
    background: var(--gold);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}
.hamburger span {
    width: 24px;
    height: 1.5px;
    background: #fff;
    transition: all 0.3s;
}

/* ═══ Hero Variants ═══ */
.hero {
    position: relative;
    height: 85vh;
    min-height: 550px;
    max-height: 800px;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
}
.hero-full { height: 100vh; max-height: 950px; }
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.65) 80%, rgba(10,10,10,0.9) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    padding: 0 48px 80px;
    max-width: 800px;
    animation: slideUp 0.9s ease-out;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-label {
    font-family: 'Outfit', sans-serif;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
    display: block;
}
.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.05;
    margin-bottom: 16px;
}
.hero h1 em {
    font-style: normal;
    font-weight: 300;
    color: var(--gold-light);
}
.hero p {
    color: rgba(255,255,255,0.65);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 500px;
    margin-bottom: 32px;
}

/* ═══ Buttons ═══ */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.35s;
}
.btn-gold {
    background: var(--gold);
    color: var(--black);
}
.btn-gold:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(196,163,90,0.3);
}
.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-outline-white:hover {
    border-color: var(--gold);
    color: var(--gold);
}
.btn-outline-dark {
    background: transparent;
    color: var(--charcoal);
    border: 1.5px solid rgba(0,0,0,0.15);
}
.btn-outline-dark:hover {
    border-color: var(--gold);
    color: var(--gold-dark);
}

/* ═══ Section ═══ */
.section {
    padding: 100px 48px;
    max-width: 1200px;
    margin: 0 auto;
}
.section-header {
    margin-bottom: 60px;
}
.section-label {
    font-family: 'Outfit', sans-serif;
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 12px;
    display: block;
}
.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    color: var(--charcoal);
    line-height: 1.15;
    margin-bottom: 12px;
}
.section-desc {
    font-size: 0.92rem;
    color: var(--medium-grey);
    max-width: 480px;
    line-height: 1.7;
}

/* ═══ Projects Grid ═══ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.project-card {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    aspect-ratio: 4/3;
    cursor: pointer;
    text-decoration: none;
}
.project-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease, filter 0.6s;
    filter: brightness(0.85);
}
.project-card:hover img {
    transform: scale(1.06);
    filter: brightness(1);
}
.project-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(transparent 50%, rgba(10,10,10,0.85));
    opacity: 0;
    transition: opacity 0.4s;
}
.project-card:hover .project-card-overlay { opacity: 1; }
.project-card-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.4s;
}
.project-card:hover .project-card-info {
    transform: translateY(0);
    opacity: 1;
}
.project-card-info h3 {
    color: #fff;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.project-card-info span {
    color: var(--gold);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ═══ Services Grid ═══ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.service-card {
    padding: 36px 28px;
    border: 1px solid var(--border-light);
    transition: all 0.4s;
    position: relative;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width 0.4s;
}
.service-card:hover::before { width: 100%; }
.service-card:hover {
    border-color: var(--gold);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}
.service-number {
    font-family: 'Outfit', sans-serif;
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--gold);
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: block;
}
.service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--charcoal);
    margin-bottom: 12px;
}
.service-card p {
    font-size: 0.85rem;
    color: var(--medium-grey);
    line-height: 1.65;
}

/* ═══ About Grid ═══ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about-image {
    aspect-ratio: 1;
    overflow: hidden;
}
.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%);
    transition: filter 0.4s;
}
.about-image:hover img { filter: grayscale(0%); }
.about-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--charcoal);
    margin-bottom: 20px;
    line-height: 1.15;
}
.about-content p {
    font-size: 0.92rem;
    color: var(--medium-grey);
    margin-bottom: 16px;
    line-height: 1.75;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--border-light);
}
.stat { text-align: center; }
.stat-number {
    font-family: 'Outfit', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--charcoal);
    display: block;
    line-height: 1;
    margin-bottom: 6px;
}
.stat-label {
    font-size: 0.68rem;
    color: var(--light-grey);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

/* ═══ Contact Section ═══ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
    font-family: 'Outfit', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--medium-grey);
}
.form-group input,
.form-group textarea,
.form-group select {
    padding: 14px 16px;
    border: 1px solid var(--border-light);
    background: var(--white);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
    color: var(--charcoal);
    transition: border-color 0.3s;
    outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--gold);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding-top: 12px;
}
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.contact-icon {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}
.contact-item h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--charcoal);
    margin-bottom: 4px;
}
.contact-item p {
    font-size: 0.82rem;
    color: var(--medium-grey);
    line-height: 1.5;
}

/* ═══ Dark Section ═══ */
.section-dark {
    background: var(--black);
    padding: 100px 48px;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-desc { color: rgba(255,255,255,0.5); }

/* ═══ Filter Tabs ═══ */
.filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.filter-tab {
    padding: 8px 20px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--medium-grey);
    cursor: pointer;
    transition: all 0.3s;
}
.filter-tab:hover,
.filter-tab.active {
    background: var(--charcoal);
    color: #fff;
    border-color: var(--charcoal);
}

/* ═══ Footer ═══ */
.footer {
    background: var(--black);
    border-top: 1px solid var(--border);
    padding: 60px 48px;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-logo {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    text-decoration: none;
}
.footer-logo span { color: var(--gold); font-weight: 300; }
.footer-links {
    display: flex;
    gap: 24px;
}
.footer-links a {
    color: rgba(255,255,255,0.35);
    font-family: 'Outfit', sans-serif;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
    transition: color 0.3s;
}
.footer-links a:hover { color: var(--gold); }
.footer-copy {
    text-align: center;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    font-size: 0.68rem;
    color: rgba(255,255,255,0.2);
}

/* ═══ Page Header (for inner pages) ═══ */
.page-header {
    padding: 140px 48px 60px;
    background: var(--black);
    text-align: center;
}
.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.page-header p {
    color: rgba(255,255,255,0.5);
    font-size: 0.92rem;
    max-width: 480px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ═══ Team Grid ═══ */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}
.team-member {
    text-align: center;
}
.team-member-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--off-white);
    margin: 0 auto 16px;
    overflow: hidden;
    border: 2px solid var(--border-light);
}
.team-member h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--charcoal);
    margin-bottom: 4px;
}
.team-member span {
    font-size: 0.78rem;
    color: var(--gold-dark);
    font-weight: 500;
}

/* ═══ Scroll Reveal ═══ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s, transform 0.7s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ═══ Responsive ═══ */
@media (max-width: 1024px) {
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav { padding: 16px 24px; }
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .nav-links.open {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10,10,10,0.98);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }
    .hero-content { padding: 0 24px 60px; }
    .section { padding: 60px 24px; }
    .section-dark { padding: 60px 24px; }
    .page-header { padding: 120px 24px 48px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .services-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .footer { padding: 40px 24px; }
    .footer-inner { flex-direction: column; gap: 20px; text-align: center; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .team-grid { grid-template-columns: 1fr; max-width: 300px; margin-left: auto; margin-right: auto; }
}