/* ═══════════════════════════════════════════════════
   SPACE INFRA PROJECTS — Custom Styles
   Premium Construction / Architecture Design System
   ═══════════════════════════════════════════════════ */

/* ─── CSS Custom Properties ─── */
:root {
    --primary: #1a5276;
    --primary-light: #2980b9;
    --primary-dark: #0e3a55;
    --charcoal: #4a4a4a;
    --charcoal-dark: #2d2d2d;
    --surface: #f5f7fa;
    --muted: #6c757d;
    --white: #ffffff;
    --accent: #d4a843;
    --border: #e2e8f0;
    --shadow: 0 4px 30px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Base ─── */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--charcoal);
    overflow-x: hidden;
}

::selection {
    background: var(--primary);
    color: var(--white);
}

/* ─── Scroll Animations ─── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delays for children */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ─── Hero Section ─── */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    0% { transform: scale(1); }
    100% { transform: scale(1.08); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(14, 58, 85, 0.92) 0%,
        rgba(26, 82, 118, 0.82) 50%,
        rgba(14, 58, 85, 0.88) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-title .accent-line {
    display: block;
    color: var(--accent);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.7;
    opacity: 0.9;
}

/* Hero text reveal */
.hero-content .hero-title {
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.3s both;
}

.hero-content .hero-subtitle {
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.6s both;
}

.hero-content .hero-cta {
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.9s both;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Page Hero (Subpages) ─── */
.page-hero {
    position: relative;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.page-hero-content {
    position: relative;
    z-index: 10;
}

/* Decorative architectural line patterns */
.page-hero::after {
    content: '';
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    border: 2px solid rgba(255,255,255,0.08);
    border-radius: 0;
    z-index: 1;
}

/* ─── Navigation ─── */
.nav-main {
    transition: var(--transition);
    z-index: 1000;
}

.nav-main.scrolled {
    background: rgba(255, 255, 255, 0.97) !important;
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-main.scrolled .nav-link-home {
    color: var(--charcoal) !important;
}

.nav-link {
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile menu */
.mobile-menu {
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-overlay {
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Hamburger animation */
.hamburger-line {
    transition: var(--transition);
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ─── Buttons ─── */
.btn-primary {
    background: var(--primary);
    color: var(--white);
    padding: 0.875rem 2rem;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.025em;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-dark);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.btn-primary:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 82, 118, 0.35);
}

.btn-outline {
    border: 2px solid var(--white);
    color: var(--white);
    padding: 0.875rem 2rem;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.025em;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--accent);
    color: var(--charcoal-dark);
    padding: 0.875rem 2rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-accent:hover {
    background: #c49932;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(212, 168, 67, 0.35);
}

/* ─── Section Heading ─── */
.section-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-label::before {
    content: '';
    width: 40px;
    height: 2px;
    background: var(--primary);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 800;
    color: var(--charcoal-dark);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.05rem;
    color: var(--muted);
    line-height: 1.8;
    max-width: 600px;
}

/* ─── Project Cards ─── */
.project-card {
    position: relative;
    overflow: hidden;
    background: var(--white);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-card-img {
    overflow: hidden;
    aspect-ratio: 4/3;
}

.project-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-card-img img {
    transform: scale(1.08);
}

.project-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(14, 58, 85, 0.9) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
}

.project-card:hover .project-card-overlay {
    opacity: 1;
}

/* ─── Service Cards ─── */
.service-card {
    background: var(--white);
    border: 1px solid var(--border);
    padding: 2.5rem 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: transparent;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--primary);
    color: var(--white);
}

/* ─── Process Timeline ─── */
.process-step {
    position: relative;
    padding-left: 4rem;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 22px;
    top: 50px;
    bottom: -30px;
    width: 2px;
    background: var(--border);
}

.process-step:last-child::before {
    display: none;
}

.process-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 46px;
    height: 46px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

@media (min-width: 768px) {
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 2rem;
    }

    .process-step {
        padding-left: 0;
        text-align: center;
    }

    .process-step::before {
        left: 50%;
        top: 46px;
        bottom: auto;
        width: calc(100% - 46px);
        height: 2px;
        transform: translateX(23px);
    }

    .process-step:last-child::before {
        display: none;
    }

    .process-number {
        position: relative;
        margin: 0 auto 1.5rem;
    }
}

/* ─── Counter Animation ─── */
.counter {
    font-variant-numeric: tabular-nums;
}

/* ─── Image Gallery / Lightbox ─── */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.gallery-item {
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
    position: relative;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.06);
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(14, 58, 85, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover::after {
    opacity: 1;
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox img {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 0 60px rgba(0,0,0,0.5);
}

.lightbox-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
    z-index: 10;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.lightbox-nav:hover {
    background: rgba(255,255,255,0.25);
}

.lightbox-prev { left: 1.5rem; }
.lightbox-next { right: 1.5rem; }

.lightbox-counter {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}

/* ─── Category Filter ─── */
.filter-btn {
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    color: var(--muted);
    transition: var(--transition);
    cursor: pointer;
    background: transparent;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ─── Footer ─── */
.footer-main {
    background: var(--charcoal-dark);
    color: rgba(255,255,255,0.75);
}

.footer-link {
    color: rgba(255,255,255,0.65);
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-link:hover {
    color: var(--white);
    padding-left: 4px;
}

/* ─── Why Choose Us / Feature Cards ─── */
.feature-card {
    padding: 2rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    background: var(--white);
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* ─── CTA Section ─── */
.cta-section {
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
}

/* Diagonal accent line */
.cta-section::after {
    content: '';
    position: absolute;
    right: 10%;
    top: -50%;
    width: 1px;
    height: 200%;
    background: rgba(255,255,255,0.1);
    transform: rotate(30deg);
}

/* ─── Forms ─── */
.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--charcoal);
    font-size: 0.95rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.1);
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--charcoal);
    margin-bottom: 0.5rem;
    display: block;
}

/* ─── Status Badges ─── */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-completed { background: #d4edda; color: #155724; }
.badge-ongoing { background: #fff3cd; color: #856404; }
.badge-new { background: #cce5ff; color: #004085; }
.badge-contacted { background: #e2e3e5; color: #383d41; }
.badge-closed { background: #f8d7da; color: #721c24; }

/* ─── Alert Messages ─── */
.alert {
    padding: 1rem 1.5rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success { background: #d4edda; color: #155724; border-left: 4px solid #28a745; }
.alert-error { background: #f8d7da; color: #721c24; border-left: 4px solid #dc3545; }
.alert-info { background: #cce5ff; color: #004085; border-left: 4px solid #0d6efd; }

/* ─── Admin Panel ─── */
.admin-sidebar {
    background: var(--charcoal-dark);
    color: rgba(255,255,255,0.8);
    width: 260px;
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    transition: transform 0.3s ease;
    z-index: 100;
}

.admin-sidebar .sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: rgba(255,255,255,0.65);
    transition: var(--transition);
    font-size: 0.9rem;
}

.admin-sidebar .sidebar-link:hover,
.admin-sidebar .sidebar-link.active {
    background: rgba(255,255,255,0.08);
    color: var(--white);
}

.admin-sidebar .sidebar-link.active {
    border-left: 3px solid var(--primary-light);
}

.admin-content {
    margin-left: 260px;
    min-height: 100vh;
    background: var(--surface);
    transition: margin-left 0.3s ease;
}

.stat-card {
    background: var(--white);
    border: 1px solid var(--border);
    padding: 1.5rem;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow);
}

/* Admin responsive */
@media (max-width: 1023px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.open {
        transform: translateX(0);
    }

    .admin-content {
        margin-left: 0;
    }
}

/* ─── Tables ─── */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    background: var(--surface);
    padding: 0.875rem 1rem;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: rgba(26, 82, 118, 0.03);
}

/* ─── Image Upload Preview ─── */
.upload-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.upload-preview-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border: 2px solid var(--border);
}

.upload-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(220, 53, 69, 0.9);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* ─── WhatsApp Float Button ─── */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    background: #25D366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: var(--transition);
    z-index: 900;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

/* ─── Loader / Skeleton ─── */
@keyframes shimmer {
    0% { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 800px 100%;
    animation: shimmer 1.5s infinite;
}

/* ─── Divider ─── */
.section-divider {
    width: 60px;
    height: 3px;
    background: var(--primary);
}

/* ─── Scroll to top ─── */
.scroll-top {
    position: fixed;
    bottom: 6rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    cursor: pointer;
    z-index: 899;
    border: none;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ─── Header Navigation Styles ─── */
.nav-main {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.nav-main.scrolled {
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.1);
    background-color: rgba(255, 255, 255, 0.98) !important;
}

.nav-link {
    position: relative;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    transition: color 0.2s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--primary, #1a5276);
    border-radius: 2px;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ─── Print ─── */
@media print {
    .nav-main, .footer-main, .whatsapp-float, .scroll-top { display: none; }
}