/* ==========================================================================
   Octagram Portfolio & Case Study Design System
   Conforms to 2026 Web Standards & Agency-Grade Visual Aesthetics
   ========================================================================== */

:root {
  --bg-primary: #11304D;
  --bg-secondary: #0c2237;
  --bg-tertiary: #173d61;
  --bg-card: rgba(12, 34, 55, 0.75);
  --bg-card-hover: rgba(23, 61, 97, 0.9);
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(56, 189, 248, 0.25);
  --border-focus: rgba(56, 189, 248, 0.6);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --accent-blue: #38bdf8;
  --accent-cyan: #22d3ee;
  --accent-indigo: #818cf8;
  --accent-purple: #c084fc;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --accent-glow: 0 0 25px rgba(56, 189, 248, 0.25);
  
  --max-width: 1240px;
  --header-height: 80px;
  --border-radius-sm: 8px;
  --border-radius: 14px;
  --border-radius-lg: 20px;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  
  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease-out;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
}

body {
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(56, 189, 248, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(129, 140, 248, 0.08) 0%, transparent 45%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(17, 48, 77, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-svg {
  height: 32px;
  width: auto;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  padding: 0.35rem 0;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-blue);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-blue);
}

/* Modern Dropdown Navigation Menu */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.dropdown-trigger {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0.35rem 0;
  font-family: inherit;
  transition: color 0.2s ease;
}

.dropdown-trigger:hover,
.nav-dropdown:hover .dropdown-trigger,
.nav-dropdown.open .dropdown-trigger {
  color: var(--text-primary);
}

.dropdown-chevron {
  width: 13px;
  height: 13px;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), color 0.25s;
  opacity: 0.75;
}

.nav-dropdown:hover .dropdown-chevron,
.nav-dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
  color: var(--accent-blue);
  opacity: 1;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  width: 290px;
  background: rgba(12, 34, 55, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.6), 0 0 25px rgba(56, 189, 248, 0.15);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(4px);
}

.dropdown-item {
  display: flex !important;
  align-items: center;
  gap: 12px;
  padding: 10px 12px !important;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-primary) !important;
  transition: all 0.2s ease !important;
  background: transparent;
  border: 1px solid transparent;
  transform: none !important;
  text-align: left;
}

.dropdown-item::after {
  display: none !important;
}

.dropdown-item:hover {
  background: rgba(56, 189, 248, 0.1) !important;
  border-color: rgba(56, 189, 248, 0.25) !important;
  transform: translateX(4px) !important;
}

.dropdown-icon {
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.dropdown-item-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dropdown-title {
  font-size: 0.925rem;
  font-weight: 600;
  color: #f8fafc;
  line-height: 1.2;
}

.dropdown-sub {
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.3;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-blue);
  color: #061826;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.header-cta:hover {
  background: #7dd3fc;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-primary);
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* Section Tags & Common Badges */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.1);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid rgba(56, 189, 248, 0.25);
  margin-bottom: 1rem;
}

.section-tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 6px var(--accent-blue);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--accent-blue);
}

.breadcrumbs .sep {
  opacity: 0.5;
}

.breadcrumbs .current {
  color: var(--accent-blue);
  font-weight: 500;
}

/* Hero Section */
.case-hero {
  padding: 3.5rem 0 3rem;
  position: relative;
}

.case-hero-content {
  max-width: 900px;
}

.case-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.case-hero-subtitle {
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: 500;
  background: linear-gradient(135deg, #e2e8f0 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.25rem;
}

.case-hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.case-hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn-live {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--accent-blue);
  color: #082136;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
}

.btn-live:hover {
  background: #7dd3fc;
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* Meta Pills Grid */
.project-meta-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-top: 1rem;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.meta-item .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.meta-item .value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.meta-item .value a {
  color: var(--accent-blue);
  text-decoration: none;
}

.meta-item .value a:hover {
  text-decoration: underline;
}

/* Mockup Windows & Device Frames */
.mockup-showcase {
  margin: 3rem 0;
  position: relative;
}

.browser-window {
  background: #091a2a;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.6), 0 0 40px rgba(56, 189, 248, 0.15);
  overflow: hidden;
  position: relative;
}

.browser-header {
  height: 42px;
  background: #061421;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 1rem;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.browser-address-bar {
  flex: 1;
  max-width: 480px;
  margin: 0 auto;
  height: 26px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding: 0 0.75rem;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.browser-address-bar .lock-icon {
  color: var(--accent-emerald);
  width: 12px;
  height: 12px;
}

.browser-address-bar .url-text {
  color: var(--text-secondary);
  font-family: monospace;
}

.browser-body {
  position: relative;
  background: #0d1e2d;
}

.browser-body img,
.mockup-canvas {
  width: 100%;
  height: auto;
  display: block;
}

/* Device Dual Frame (Desktop + Mobile) */
.dual-device-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: center;
  margin: 3.5rem 0;
}

.phone-window {
  background: #050d15;
  border-radius: 36px;
  border: 4px solid #1e364a;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(56, 189, 248, 0.15);
  overflow: hidden;
  max-width: 280px;
  margin: 0 auto;
  position: relative;
}

.phone-notch {
  width: 90px;
  height: 18px;
  background: #1e364a;
  border-radius: 0 0 12px 12px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

.phone-body {
  padding: 0.5rem;
  background: #091a2a;
}

/* Visual Mockup Rich Cards */
.visual-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.visual-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.visual-preview-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.visual-card-frame {
  background: #081827;
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0.75rem 0;
}

.visual-card-info {
  padding: 1.5rem;
}

.visual-card-info h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.visual-card-info p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Section Containers */
.case-section {
  padding: 4.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.section-title-wrap {
  margin-bottom: 2.5rem;
}

.section-title-wrap h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-title-wrap p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 720px;
}

/* Overview & Challenge Grid */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: var(--transition-smooth);
}

.overview-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  margin-bottom: 0.5rem;
}

.overview-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

.overview-card p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.65;
}

.overview-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.overview-card li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.98rem;
  color: var(--text-secondary);
}

.overview-card li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: 700;
}

/* Feature Showcase Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.85rem;
  transition: var(--transition-smooth);
}

.feature-box:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.feature-box .f-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 1rem;
}

.feature-box h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: #ffffff;
}

.feature-box p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Information Architecture Table */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 2rem 0;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
}

.tech-spec-table {
  width: 100%;
  border-collapse: collapse;
  background: transparent;
  margin: 0;
  min-width: 620px;
}

.tech-spec-table th,
.tech-spec-table td {
  padding: 1.15rem 1.6rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
  vertical-align: middle;
}

.tech-spec-table th {
  background: rgba(8, 26, 43, 0.9);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.tech-spec-table tr:last-child td {
  border-bottom: none;
}

.tech-spec-table td.dim {
  color: var(--text-muted);
}

/* Live CTA Section */
.live-website-cta {
  background: linear-gradient(135deg, rgba(12, 34, 55, 0.95) 0%, rgba(23, 61, 97, 0.95) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--border-radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), var(--accent-glow);
  margin: 4rem 0;
}

.live-website-cta h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  color: #ffffff;
}

.live-website-cta p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* Explore More Work / Next Project Nav */
.explore-work {
  padding: 4.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.portfolio-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(56, 189, 248, 0.15);
}

.card-visual {
  height: 220px;
  background: #081827;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
}

.card-visual img,
.card-visual svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio-card:hover .card-visual img,
.portfolio-card:hover .card-visual svg {
  transform: scale(1.04);
}

.card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-blue);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.portfolio-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.portfolio-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex: 1;
}

.card-link-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-top: auto;
}

.portfolio-card:hover .card-link-cta {
  color: #7dd3fc;
  gap: 0.6rem;
}

/* Conversion Closing CTA */
.conversion-cta-block {
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.14) 0%, rgba(12, 34, 55, 0.85) 75%);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 4.5rem 2rem;
  text-align: center;
  margin: 4rem auto;
  max-width: var(--max-width);
}

.conversion-cta-block h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: #ffffff;
}

.conversion-cta-block p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 2.25rem;
}

/* Footer */
footer {
  margin-top: auto;
  background: #081a2b;
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
  text-align: center;
}

.footer-nav {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--accent-blue);
}

.footer-socials {
  display: flex;
  gap: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.social-link:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.1);
}

.copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Featured Large Project Cards (Work Hub) */
.featured-card {
  border-radius: var(--border-radius-lg);
  background: linear-gradient(180deg, rgba(12,34,55,0.85) 0%, rgba(8,22,35,0.95) 100%);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.featured-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 20px 40px rgba(0,0,0,0.45), 0 0 25px rgba(56,189,248,0.15);
  transform: translateY(-4px);
}

.featured-card-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2.25rem;
}

.featured-card-visual {
  height: 100%;
  min-height: 320px;
  max-height: 400px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: #061524;
}

.featured-card-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  display: block;
}

.featured-card:hover .featured-card-visual img {
  transform: scale(1.03);
}

.card-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Responsive Media Queries */
@keyframes slideDownNav {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .featured-card-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem;
  }

  .featured-card-visual {
    min-height: 260px;
    max-height: 340px;
  }

  .dual-device-wrap {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .phone-window {
    max-width: 300px;
  }
  
  .overview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .site-header {
    height: var(--header-height);
  }

  .main-nav {
    display: none;
  }
  
  .main-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: rgba(10, 29, 48, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    padding: 1.25rem 1.5rem 2.5rem;
    gap: 0.5rem;
    z-index: 1000;
    animation: slideDownNav 0.22s ease-out forwards;
  }

  .main-nav.mobile-open a {
    padding: 0.75rem 1rem;
    font-size: 1.05rem;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
  }

  .main-nav.mobile-open a.active,
  .main-nav.mobile-open a:hover {
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.3);
    color: var(--accent-blue);
  }

  .main-nav .nav-dropdown {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav .dropdown-trigger {
    font-size: 1.05rem;
    font-weight: 500;
    padding: 0.75rem 1rem;
    width: 100%;
    justify-content: space-between;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
  }

  .main-nav .dropdown-menu {
    position: static;
    transform: none;
    width: 100%;
    background: rgba(7, 22, 37, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 6px;
    margin-top: 4px;
    margin-bottom: 6px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: flex;
  }

  .main-nav .dropdown-item {
    padding: 8px 10px !important;
  }

  .main-nav .dropdown-title {
    font-size: 0.875rem;
  }

  .main-nav .dropdown-sub {
    font-size: 0.7rem;
  }
  
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
  }
  
  .case-hero {
    padding: 2.25rem 0 1.75rem;
  }
  
  .case-hero h1 {
    font-size: clamp(1.85rem, 7vw, 2.5rem);
  }

  .case-hero-subtitle {
    font-size: 1.15rem;
  }

  .case-hero-desc {
    font-size: 1.02rem;
    line-height: 1.6;
  }
  
  .case-section {
    padding: 2.75rem 0;
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .featured-card-grid {
    padding: 1.35rem;
    gap: 1.5rem;
  }

  .featured-card-visual {
    min-height: 220px;
    max-height: 280px;
  }
  
  .visual-card-grid {
    grid-template-columns: 1fr;
  }
  
  .project-meta-strip {
    grid-template-columns: 1fr 1fr;
    padding: 1.25rem;
    gap: 1rem;
  }
  
  .live-website-cta {
    padding: 2.25rem 1.25rem;
    margin: 3rem 0;
  }

  .conversion-cta-block {
    padding: 3rem 1.25rem;
    margin: 2.5rem auto;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .project-meta-strip {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .feature-box {
    padding: 1.35rem;
  }
  
  .case-hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .card-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }
  
  .btn-live,
  .btn-secondary {
    justify-content: center;
    width: 100%;
    min-height: 46px;
    padding: 0.85rem 1.25rem;
    text-align: center;
  }

  .featured-card-grid {
    padding: 1.15rem;
  }

  .featured-card-visual {
    min-height: 190px;
    max-height: 240px;
  }

  .phone-window {
    max-width: 100%;
    border-radius: 28px;
    border-width: 3px;
  }

  .header-cta {
    padding: 0.5rem 0.9rem;
    font-size: 0.82rem;
  }
}