/* ============================================================
   El-Saed — Modern Dark Theme
   Responsive, RTL/LTR, interactive
   ============================================================ */

:root {
    --bg: #0b1020;
    --bg-2: #0e1428;
    --bg-3: #131a33;
    --card: rgba(255, 255, 255, 0.04);
    --card-hover: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.09);
    --text: #eef1ff;
    --text-soft: #aab3d0;
    --muted: #7a84a6;
    --accent: #DF3C2A;
    --accent-2: #ff6b4a;
    --blue: #4f8bff;
    --cyan: #37d5e0;
    --violet: #8b5cf6;
    --grad: linear-gradient(120deg, #4f8bff 0%, #37d5e0 50%, #8b5cf6 100%);
    --grad-accent: linear-gradient(120deg, #DF3C2A, #ff6b4a);
    --radius: 18px;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    --font: 'DM Sans', 'Cairo', 'Segoe UI', system-ui, sans-serif;
    --font-head: 'Roboto Slab', 'Cairo', Georgia, serif;
    --tr: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-h: 76px;
}

/* Light theme */
[data-theme="light"] {
    --bg: #f5f6fa;
    --bg-2: #ffffff;
    --bg-3: #ebedf5;
    --card: rgba(0, 0, 0, 0.04);
    --card-hover: rgba(0, 0, 0, 0.07);
    --border: rgba(0, 0, 0, 0.1);
    --text: #1a1d2e;
    --text-soft: #4a5068;
    --muted: #6b7394;
    --accent: #DF3C2A;
    --accent-2: #ff6b4a;
    --blue: #3b7bff;
    --cyan: #1ebfcf;
    --violet: #7c4ddf;
    --grad: linear-gradient(120deg, #3b7bff 0%, #1ebfcf 50%, #7c4ddf 100%);
    --grad-accent: linear-gradient(120deg, #DF3C2A, #ff6b4a);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
}

/* Blue Dark theme */
[data-theme="blue"] {
    --bg: #060d1f;
    --bg-2: #0a1330;
    --bg-3: #0f1a40;
    --card: rgba(79, 139, 255, 0.06);
    --card-hover: rgba(79, 139, 255, 0.1);
    --border: rgba(79, 139, 255, 0.15);
    --text: #e8eeff;
    --text-soft: #9bb3e8;
    --muted: #6a82b8;
    --accent: #4f8bff;
    --accent-2: #6fa3ff;
    --blue: #4f8bff;
    --cyan: #37d5e0;
    --violet: #8b5cf6;
    --grad: linear-gradient(120deg, #4f8bff 0%, #37d5e0 50%, #8b5cf6 100%);
    --grad-accent: linear-gradient(120deg, #4f8bff, #6fa3ff);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

/* Green Dark theme */
[data-theme="green"] {
    --bg: #061210;
    --bg-2: #0a1a17;
    --bg-3: #0f2520;
    --card: rgba(34, 197, 94, 0.06);
    --card-hover: rgba(34, 197, 94, 0.1);
    --border: rgba(34, 197, 94, 0.15);
    --text: #e8fff0;
    --text-soft: #9bd8b5;
    --muted: #5a9e7a;
    --accent: #22c55e;
    --accent-2: #4ade80;
    --blue: #3b82f6;
    --cyan: #22d3ee;
    --violet: #a78bfa;
    --grad: linear-gradient(120deg, #22c55e 0%, #22d3ee 50%, #a78bfa 100%);
    --grad-accent: linear-gradient(120deg, #22c55e, #4ade80);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scrollbar-color: var(--blue) var(--bg-2);
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: var(--tr);
}

/* RTL adjustments flow from html[dir] via CSS logical properties where supported */
html[dir="rtl"] body { text-align: right; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-head);
    font-weight: 700;
    color: var(--text);
    line-height: 1.25;
    margin-bottom: 0.8rem;
    letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p { color: var(--text-soft); margin-bottom: 1rem; }

a { color: var(--cyan); text-decoration: none; transition: var(--tr); }
a:hover { color: #fff; }
img { max-width: 100%; display: block; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

::selection { background: var(--grad); color: #fff; }

.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* Scroll reveal (JS adds .in-view) */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in-view { opacity: 1; transform: none; }
html[dir="rtl"] .reveal { transform: translateY(28px); }
html[dir="rtl"] .reveal.in-view { transform: none; }

/* ============ Buttons ============ */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    padding: 14px 28px; border-radius: 40px; font-weight: 600; font-size: 0.98rem;
    color: #fff; background: var(--grad-accent); transition: var(--tr);
    box-shadow: 0 12px 30px rgba(223, 60, 42, 0.35); white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); color: #fff; box-shadow: 0 16px 38px rgba(223, 60, 42, 0.5); }
.btn-outline {
    background: transparent; border: 1px solid var(--border); box-shadow: none; color: var(--text);
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(79,139,255,0.08); box-shadow: none; }
.btn-ghost { background: rgba(255,255,255,0.06); box-shadow: none; }
.btn-ghost:hover { background: rgba(255,255,255,0.12); box-shadow: none; }
.btn .icon { font-size: 1.1rem; }

/* ============ Header / Nav ============ */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-h);
    display: flex; align-items: center;
    transition: background 0.4s ease, box-shadow 0.4s ease;
    background: transparent;
}
.site-header.scrolled {
    background: rgba(11, 16, 32, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { width: 46px; height: 46px; border-radius: 12px; overflow: hidden; flex-shrink: 0; }
.brand-logo img { width: 100%; height: 100%; object-fit: cover; }
.brand-name { font-family: var(--font-head); font-weight: 700; font-size: 1.15rem; color: #fff; line-height: 1.15; }
.brand-name small { display: block; font-family: var(--font); font-size: 0.62rem; font-weight: 500; color: var(--muted); letter-spacing: 1.5px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
    color: var(--text-soft); font-weight: 500; font-size: 0.95rem;
    padding: 9px 15px; border-radius: 30px; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(255,255,255,0.06); }
.nav-links a.active::after { content: ""; position: absolute; bottom: 6px; left: 50%; transform: translateX(-50%); width: 18px; height: 3px; border-radius: 3px; background: var(--grad); }
html[dir="rtl"] .nav-links a.active::after { left: auto; right: 50%; transform: translateX(50%); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch {
    display: flex; background: rgba(255,255,255,0.06); border: 1px solid var(--border);
    border-radius: 40px; padding: 3px; gap: 3px;
}
.lang-switch button {
    padding: 6px 12px; border-radius: 40px; font-weight: 700; font-size: 0.82rem; color: var(--muted);
}
.lang-switch button.active { background: var(--grad); color: #fff; }

.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 12px; background: rgba(255,255,255,0.06); border: 1px solid var(--border); align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; border-radius: 2px; position: relative; transition: var(--tr); }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; width: 22px; height: 2px; background: #fff; border-radius: 2px; left: 0; transition: var(--tr); }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* Mobile menu */
.mobile-menu { position: fixed; top: var(--nav-h); left: 0; right: 0; background: var(--bg-2); border-bottom: 1px solid var(--border); padding: 18px 24px 26px; transform: translateY(-20px); opacity: 0; pointer-events: none; transition: var(--tr); z-index: 999; }
.mobile-menu.open { transform: none; opacity: 1; pointer-events: auto; }
.mobile-menu a { display: block; padding: 13px 8px; color: var(--text-soft); font-weight: 500; border-bottom: 1px solid var(--border); }
.mobile-menu a:last-of-type { border-bottom: none; }
.mobile-menu a.active { color: #fff; }

/* ============ Hero ============ */
.hero {
    min-height: 100svh;
    display: flex; align-items: center; position: relative;
    padding: calc(var(--nav-h) + 40px) 0 80px;
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg::before { content: ""; position: absolute; inset: 0; background: radial-gradient(70% 60% at 70% 20%, rgba(79,139,255,0.28), transparent 60%), radial-gradient(50% 50% at 15% 80%, rgba(139,92,246,0.22), transparent 60%), radial-gradient(40% 40% at 90% 70%, rgba(55,213,224,0.18), transparent 60%); }
.hero-grid { position: absolute; inset: 0; opacity: 0.5; background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px); background-size: 60px 60px; mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%); }
.hero-glow { position: absolute; width: 500px; height: 500px; border-radius: 50%; filter: blur(120px); opacity: 0.4; }
.hero-glow.gl1 { background: var(--blue); top: -100px; right: -50px; }
.hero-glow.gl2 { background: var(--violet); bottom: -120px; left: -60px; }

.hero-content { position: relative; z-index: 2; width: 100%; max-width: 760px; }
.hero-content.hero-split { max-width: 1100px; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.hero-content.hero-split .hero-text { max-width: 100%; }
.hero-content.hero-split .hero-text h1 { max-width: 100%; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px;
    border-radius: 40px; background: rgba(255,255,255,0.05); border: 1px solid var(--border);
    color: var(--text-soft); font-size: 0.85rem; font-weight: 600; margin-bottom: 22px; letter-spacing: 0.5px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero p.lead { font-size: 1.2rem; color: var(--text-soft); max-width: 600px; margin-bottom: 34px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats { display: grid !important; grid-template-columns: repeat(3, 1fr) !important; gap: 18px !important; margin-top: 70px !important; }
.hero-stat { padding: 20px 24px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--border); backdrop-filter: blur(8px); }
.hero-stat .num { font-family: var(--font-head); font-size: 2rem; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stat .lbl { color: var(--muted); font-size: 0.85rem; }

/* scroll indicator */
.scroll-ind { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 2; width: 26px; height: 42px; border: 2px solid rgba(255,255,255,0.3); border-radius: 20px; display: flex; justify-content: center; }
.scroll-ind::after { content: ""; width: 4px; height: 8px; border-radius: 4px; background: #fff; margin-top: 8px; animation: scrollDot 1.6s infinite; }
@keyframes scrollDot { 0%{opacity:0;transform:translateY(0)} 40%{opacity:1} 80%{opacity:0;transform:translateY(12px)} 100%{opacity:0} }

/* ============ Sections ============ */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-2); }
.section-heading { max-width: 720px; margin-bottom: 48px; }
.section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-tag {
    display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); font-weight: 700;
    font-size: 0.82rem; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 14px;
}
.section-tag::before { content: ""; width: 26px; height: 2px; background: var(--grad); border-radius: 2px; }
.section-heading.center .section-tag::before { display: none; }
.section-heading.center .section-tag { justify-content: center; }
.section-heading p { color: var(--muted); font-size: 1.08rem; margin-top: 4px; }

/* ============ Services grid ============ */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.service-card {
    position: relative; padding: 34px 30px; border-radius: var(--radius);
    background: var(--card); border: 1px solid var(--border); overflow: hidden; transition: var(--tr);
    display: flex; flex-direction: column; min-height: 220px;
}
.service-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease; }
html[dir="rtl"] .service-card::before { transform-origin: right; }
.service-card:hover { transform: translateY(-8px); background: var(--card-hover); border-color: rgba(79,139,255,0.4); box-shadow: var(--shadow); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { width: 58px; height: 58px; border-radius: 16px; background: var(--grad); display: grid; place-items: center; margin-bottom: 20px; font-size: 1.5rem; box-shadow: 0 10px 24px rgba(79,139,255,0.3); }
.service-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.service-card p { color: var(--muted); font-size: 0.95rem; flex: 1; }
.service-card .link { margin-top: 18px; color: var(--cyan); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; font-size: 0.92rem; }

/* ============ Projects ============ */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 26px; }
.project-card {
    position: relative; border-radius: var(--radius); overflow: hidden; display: block;
    background: var(--card); border: 1px solid var(--border); transition: var(--tr); color: var(--text);
}
.project-card:hover { transform: translateY(-8px); border-color: rgba(79,139,255,0.4); box-shadow: var(--shadow); color: var(--text); }
.project-cover { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--bg-3); }
.project-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.project-card:hover .project-cover img { transform: scale(1.07); }
.project-cover .badge { position: absolute; top: 16px; inset-inline-start: 16px; padding: 6px 14px; border-radius: 30px; background: rgba(11,16,32,0.7); backdrop-filter: blur(6px); color: #fff; font-size: 0.78rem; font-weight: 600; border: 1px solid var(--border); }
.project-body { padding: 24px; }
.project-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.project-body p { color: var(--muted); font-size: 0.93rem; }
.project-body .arrow { margin-top: 14px; color: var(--cyan); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; font-size: 0.9rem; }
.project-cover .year-badge { position: absolute; bottom: 16px; inset-inline-end: 16px; padding: 6px 14px; border-radius: 30px; background: var(--grad-accent); color: #fff; font-size: 0.78rem; font-weight: 700; border: 1px solid var(--border); }

/* ============ Projects year filter ============ */
.year-filter { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.year-chip {
    padding: 10px 20px; border-radius: 40px; font-weight: 600; font-size: 0.95rem;
    background: var(--card); border: 1px solid var(--border); color: var(--text-soft);
    transition: var(--tr); cursor: pointer; text-decoration: none;
}
.year-chip:hover { border-color: var(--cyan); color: var(--cyan); }
.year-chip.active { background: var(--grad-accent); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(223,60,42,0.3); }

/* ============ About / content ============ */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split .media { position: relative; }
.split .media img { border-radius: var(--radius); box-shadow: var(--shadow); }
.split .media::after { content: ""; position: absolute; top: 22px; inset-inline-end: -22px; width: 60%; height: 100%; border-radius: var(--radius); background: var(--grad); opacity: 0.15; z-index: -1; filter: blur(8px); }
.feature-list li { display: flex; gap: 14px; margin-bottom: 16px; color: var(--text-soft); }
.feature-list li .chk { flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--grad); display: grid; place-items: center; color: #fff; font-size: 0.7rem; }

/* ============ CTA ============ */
.cta { position: relative; overflow: hidden; background: var(--bg-2); border-top: 1px solid var(--border); }
.cta .glow { position: absolute; width: 400px; height: 400px; border-radius: 50%; filter: blur(110px); opacity: 0.4; background: var(--grad); }
.cta-inner { position: relative; text-align: center; padding: 70px 20px; }
.cta-inner h2 { max-width: 640px; margin: 0 auto 16px; }
.cta-inner p { max-width: 560px; margin: 0 auto 30px; color: var(--muted); }

/* ============ Project detail ============ */
.page-hero { min-height: 46vh; display: flex; align-items: flex-end; padding: calc(var(--nav-h) + 60px) 0 50px; position: relative; overflow: hidden; background: var(--bg-2); }
.page-hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 70% at 80% 0%, rgba(79,139,255,0.25), transparent 60%); }
.page-hero .crumbs { color: var(--muted); font-size: 0.85rem; margin-bottom: 18px; }
.page-hero .crumbs a { color: var(--cyan); }
.page-hero h1 { max-width: 860px; }

/* Hero split layout */
.hero-split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; width: 100%; }
.hero-split .hero-text h1 { max-width: 100%; }
.hero-split .hero-text p { margin-top: 8px; }

/* Hero slider */
.hero-slider { position: relative !important; border-radius: var(--radius); overflow: hidden; height: 400px; background: var(--bg-3); border: 1px solid var(--border); display: block !important; width: auto !important; }
.slider-track { position: relative; width: 100%; height: 100%; }
.hero-slider .slide { position: absolute; inset: 0; opacity: 0; transition: opacity 0.8s ease; }
.hero-slider .slide.active { opacity: 1; }
.hero-slider .slide img { width: 100%; height: 100%; object-fit: contain; }
.slider-btn {
    position: absolute; top: 50%; transform: translateY(-50%); width: 40px; height: 40px;
    border-radius: 50%; border: 1px solid var(--border); background: rgba(11,16,32,0.7);
    backdrop-filter: blur(6px); color: #fff; font-size: 0.85rem; cursor: pointer;
    display: grid; place-items: center; transition: var(--tr); z-index: 2;
}
.slider-btn:hover { background: var(--grad-accent); border-color: transparent; }
.slider-prev { inset-inline-start: 12px; }
.slider-next { inset-inline-end: 12px; }
.slider-dots { position: absolute !important; bottom: 14px !important; left: 50% !important; transform: translateX(-50%) !important; display: flex !important; gap: 8px !important; z-index: 2 !important; justify-content: center !important; align-items: center !important; }
.slider-dots .dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.35); cursor: pointer; transition: var(--tr); }
.slider-dots .dot.active { background: var(--accent); width: 22px; border-radius: 4px; }

html[dir="rtl"] .slider-prev i, html[dir="rtl"] .slider-next i { transform: scaleX(-1); }

@media (max-width: 900px) {
    .hero-split { grid-template-columns: 1fr; }
    .hero-slider { height: 300px !important; }
}

.scope-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.scope-list li { display: flex; gap: 12px; padding: 18px 20px; border-radius: 14px; background: var(--card); border: 1px solid var(--border); color: var(--text-soft); align-items: flex-start; font-size: 0.96rem; }
.scope-list li .num { flex-shrink: 0; width: 30px; height: 30px; border-radius: 9px; background: var(--grad); color: #fff; display: grid; place-items: center; font-size: 0.82rem; font-weight: 700; }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.gallery-item { position: relative; border-radius: 14px; overflow: hidden; aspect-ratio: 4/3; cursor: pointer; background: var(--bg-3); border: 1px solid var(--border); }
.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 .zoom { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(11,16,32,0.45); opacity: 0; transition: var(--tr); color: #fff; font-size: 1.4rem; }
.gallery-item:hover .zoom { opacity: 1; }
.videos { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.videos video { width: 100%; border-radius: 14px; background: #000; border: 1px solid var(--border); }

/* Lightbox */
.lightbox { position: fixed; inset: 0; z-index: 2000; background: rgba(5,8,18,0.94); display: none; align-items: center; justify-content: center; padding: 24px; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 92%; max-height: 88%; border-radius: 12px; box-shadow: var(--shadow); }
.lightbox .close { position: absolute; top: 24px; inset-inline-end: 24px; width: 46px; height: 46px; border-radius: 50%; background: rgba(255,255,255,0.1); color: #fff; font-size: 1.3rem; display: grid; place-items: center; }
.lightbox .prev, .lightbox .next { position: absolute; top: 50%; transform: translateY(-50%); width: 50px; height: 50px; border-radius: 50%; background: rgba(255,255,255,0.1); color: #fff; font-size: 1.4rem; display: grid; place-items: center; }
.lightbox .prev { inset-inline-start: 24px; }
.lightbox .next { inset-inline-end: 24px; }
.lb-counter { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.6); font-size: .9rem; background: rgba(0,0,0,.4); padding: 6px 16px; border-radius: 20px; }

/* ============ Project Detail Page ============ */
.proj-hero { position: relative; min-height: 420px; display: flex; align-items: flex-end; overflow: hidden; }
.proj-hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.05); }
.proj-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(11,16,32,0.95) 0%, rgba(11,16,32,0.5) 50%, rgba(11,16,32,0.3) 100%); }
.proj-hero-content { position: relative; z-index: 2; padding: 60px 0 48px; }
.proj-hero-content h1 { font-size: 2.4rem; margin: 12px 0 16px; max-width: 800px; }
.proj-hero-meta { display: flex; flex-wrap: wrap; gap: 20px; }
.proj-hero-meta span { display: inline-flex; align-items: center; gap: 8px; color: var(--text-soft); font-size: .9rem; padding: 6px 14px; background: rgba(255,255,255,0.06); border-radius: 30px; border: 1px solid var(--border); }
.proj-hero-meta i { color: var(--cyan); }

.proj-overview { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.proj-overview-text .section-tag { margin-bottom: 8px; }
.proj-overview-text h2 { margin-bottom: 16px; font-size: 1.6rem; }
.proj-desc { color: var(--text-soft); line-height: 1.8; font-size: 1.02rem; }
.proj-overview-img { border-radius: 18px; overflow: hidden; border: 1px solid var(--border); }
.proj-overview-img img { width: 100%; display: block; }

.proj-gallery { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.proj-gallery .gallery-item { aspect-ratio: 16/10; }

.proj-videos { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); gap: 22px; }
.video-card { border-radius: 16px; overflow: hidden; border: 1px solid var(--border); background: #000; }
.video-card video { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; }

@media (max-width: 768px) {
    .proj-hero { min-height: 320px; }
    .proj-hero-content h1 { font-size: 1.6rem; }
    .proj-hero-meta { gap: 10px; }
    .proj-overview { grid-template-columns: 1fr; gap: 24px; }
    .proj-gallery { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .proj-videos { grid-template-columns: 1fr; }
}

/* ============ Contact ============ */
.contact-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 50px; }
.info-card { display: flex; gap: 16px; padding: 22px; border-radius: 16px; background: var(--card); border: 1px solid var(--border); margin-bottom: 16px; }
.info-card .ic { flex-shrink: 0; width: 50px; height: 50px; border-radius: 14px; background: var(--grad); display: grid; place-items: center; color: #fff; font-size: 1.2rem; }
.info-card h4 { font-size: 1.02rem; margin-bottom: 4px; }
.info-card p { color: var(--muted); margin: 0; }
.contact-form { padding: 34px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--border); }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; color: var(--text-soft); }
.field input, .field textarea, .field select {
    width: 100%; padding: 14px 16px; border-radius: 12px; background: var(--bg-2);
    border: 1px solid var(--border); color: var(--text); font-family: var(--font); transition: var(--tr); outline: none;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(79,139,255,0.15); }
.field textarea { min-height: 130px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============ Footer ============ */
.site-footer { background: var(--bg-2); border-top: 1px solid var(--border); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 50px; }
.footer-grid h4 { font-size: 1.02rem; margin-bottom: 18px; }
.footer-grid a { display: block; color: var(--muted); padding: 6px 0; font-size: 0.95rem; }
.footer-grid a:hover { color: var(--cyan); }
.footer-brand p { color: var(--muted); font-size: 0.95rem; }
.footer-bottom { border-top: 1px solid var(--border); padding: 22px 0; text-align: center; color: var(--muted); font-size: 0.88rem; }

/* ============ Misc ============ */
.back-top { position: fixed; bottom: 26px; inset-inline-end: 26px; width: 50px; height: 50px; border-radius: 14px; background: var(--grad); color: #fff; display: none; place-items: center; font-size: 1.2rem; z-index: 900; box-shadow: var(--shadow); }
.back-top.show { display: grid; }

/* ============ Responsive ============ */
@media (max-width: 992px) {
    .nav-links { display: none; }
    .nav-toggle { display: inline-flex; }
    .split { grid-template-columns: 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-stats { margin-top: 50px; }
    .hero-content.hero-split { grid-template-columns: 1fr; max-width: 760px; }
    .hero-slider { height: 260px !important; margin: 30px auto 0; width: 100% !important; }
    .hero-slider .slide img { object-fit: contain; background: var(--bg-3); }
}
@media (max-width: 600px) {
    .section { padding: 64px 0; }
    .nav-actions { gap: 8px; }
    .nav-quote { display: none !important; }
    .brand-name small { display: none; }
    .hero { padding-top: calc(var(--nav-h) + 24px); }
    .hero p.lead { font-size: 1.05rem; }
    .hero-btns { flex-direction: column; align-items: stretch; }
    .hero-btns .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .gallery { grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); }
    .projects-grid { grid-template-columns: 1fr; }
}
/* very small screens */
@media (max-width: 380px) {
    .container { padding: 0 16px; }
    .brand-name { font-size: 1rem; }
}

/* ============ Theme Switcher ============ */
.theme-toggle {
    position: fixed; bottom: 26px; inset-inline-end: 80px; width: 50px; height: 50px;
    border-radius: 14px; background: var(--grad); color: #fff; display: grid;
    place-items: center; font-size: 1.2rem; z-index: 900; box-shadow: var(--shadow);
    cursor: pointer; border: none; transition: var(--tr);
}
.theme-toggle:hover { transform: scale(1.1); }

.theme-panel {
    position: fixed; top: 0; bottom: 0; width: 280px; z-index: 2000;
    background: var(--bg-2); border-inline-end: 1px solid var(--border);
    box-shadow: var(--shadow); padding: 28px 24px;
    transform: translateX(-100%); transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
    overflow-y: auto;
}
html[dir="rtl"] .theme-panel { left: 0; right: auto; transform: translateX(-100%); }
html[dir="ltr"] .theme-panel { right: 0; left: auto; transform: translateX(100%); }
.theme-panel.open { transform: translateX(0) !important; }
.theme-panel h3 { font-size: 1.1rem; margin-bottom: 20px; color: var(--text); }
.theme-panel .close-btn {
    position: absolute; top: 18px; inset-inline-end: 18px; width: 34px; height: 34px;
    border-radius: 50%; background: var(--card); border: 1px solid var(--border);
    color: var(--text-soft); display: grid; place-items: center; cursor: pointer;
    font-size: 0.9rem; transition: var(--tr);
}
.theme-panel .close-btn:hover { background: var(--accent); color: #fff; border-color: transparent; }

.theme-opt {
    display: flex; align-items: center; gap: 14px; padding: 14px 16px;
    border-radius: 14px; background: var(--card); border: 1px solid var(--border);
    margin-bottom: 12px; cursor: pointer; transition: var(--tr);
}
.theme-opt:hover { border-color: var(--cyan); }
.theme-opt.active { border-color: var(--accent); background: var(--card-hover); }
.theme-opt .preview {
    width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
    border: 2px solid var(--border);
}
.theme-opt .preview.dark-p { background: linear-gradient(135deg, #0b1020, #131a33); }
.theme-opt .preview.light-p { background: linear-gradient(135deg, #f5f6fa, #ffffff); }
.theme-opt .preview.blue-p { background: linear-gradient(135deg, #060d1f, #0f1a40); }
.theme-opt .preview.green-p { background: linear-gradient(135deg, #061210, #0f2520); }
.theme-opt .name { font-weight: 600; font-size: 0.95rem; color: var(--text); }
.theme-opt .check { margin-inline-start: auto; color: var(--accent); font-size: 1rem; opacity: 0; transition: var(--tr); }
.theme-opt.active .check { opacity: 1; }

.theme-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1999;
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.theme-overlay.open { opacity: 1; pointer-events: auto; }

@media (max-width: 600px) {
    .theme-toggle { bottom: 20px; inset-inline-end: 20px; width: 44px; height: 44px; font-size: 1rem; }
    .theme-panel { width: 260px; padding: 24px 20px; }
}