/* ==========================================================================
   ZUHRIS PHOTOGRAPHY LAB — MAIN STYLESHEET
   Dark Photography Studio Design System & Global Styles
   ========================================================================== */

:root {
  /* Color Palette - Dark Photography Studio */
  --bg-primary: #0a0c10;
  --bg-secondary: #12161f;
  --bg-tertiary: #1a202c;
  --bg-card: rgba(26, 32, 44, 0.75);
  --bg-card-hover: rgba(35, 43, 59, 0.85);
  --bg-glass: rgba(18, 22, 31, 0.82);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-active: rgba(245, 158, 11, 0.5);

  /* Brand Accents */
  --accent-amber: #f59e0b;
  --accent-amber-light: #fbbf24;
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;

  /* Typography */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --font-main: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Shadows & Glassmorphism */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow-amber: 0 0 20px rgba(245, 158, 11, 0.3);
  --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --header-height: 70px;
  --max-width: 1320px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(245, 158, 11, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-amber);
}

/* Common Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent-amber);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-amber-light);
}

.mono {
  font-family: var(--font-mono);
}

/* Global Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-logo-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.3));
  transition: transform var(--transition-fast);
}

.brand:hover .brand-logo-icon {
  transform: scale(1.08) rotate(-3deg);
}

.brand-svg-icon {
  width: 100%;
  height: 100%;
}

.brand-text {
  display: flex;
  align-items: center;
}

.brand-title {
  font-size: 1.15rem;
  line-height: 1;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

/* Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border-color: var(--border-subtle);
}

.nav-link.active {
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.35);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.15);
}

/* Dedicated Teacher Portal Link Pill */
.nav-link.nav-link-teacher {
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.25);
  color: var(--accent-cyan);
}

.nav-link.nav-link-teacher:hover {
  background: rgba(6, 182, 212, 0.18);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.nav-link.nav-link-teacher.active {
  background: rgba(6, 182, 212, 0.25);
  border-color: var(--accent-cyan);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-icon.active {
  color: var(--accent-amber);
  border-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.15);
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  color: var(--text-inverse);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow-amber);
  transition: all var(--transition-fast);
}

.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.45);
  color: var(--text-inverse);
}

/* Core Button Styles */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  color: var(--text-inverse);
  font-weight: 800;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-glow-amber);
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.45);
  color: var(--text-inverse);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-amber);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(1px);
}

.modal-actions-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Mobile Hamburger */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* ==========================================================================
   PAGE SECTIONS & ROUTING
   ========================================================================== */
main {
  margin-top: var(--header-height);
  flex: 1;
}

.page-view {
  display: none;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  padding-bottom: 4rem;
}

.page-view.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   HERO / LANDING SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-amber);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span.highlight {
  background: linear-gradient(135deg, var(--accent-amber), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 540px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, var(--accent-amber), #d97706);
  color: #000000;
  font-weight: 800;
  font-size: 1rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(245, 158, 11, 0.55);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-active);
  transform: translateY(-2px);
}

/* Hero Camera Graphic Visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-camera-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.camera-body-mock {
  position: relative;
  background: #0f131a;
  border: 2px solid #2d3748;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.8);
}

.camera-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.camera-model-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-amber);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.camera-status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.camera-lens-mock {
  width: 180px;
  height: 180px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #1e293b 0%, #090d14 70%, #000000 100%);
  border: 6px solid #334155;
  box-shadow: 0 0 25px rgba(0,0,0,0.8), inset 0 0 20px rgba(6, 182, 212, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.lens-reflection {
  position: absolute;
  top: 15%;
  left: 20%;
  width: 60px;
  height: 30px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.4) 0%, rgba(245, 158, 11, 0.1) 100%);
  border-radius: 50%;
  transform: rotate(-30deg);
  filter: blur(4px);
}

.lens-aperture-center {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  background: #05070a;
  border: 2px dashed rgba(245, 158, 11, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-amber);
}

.camera-quick-readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.5);
  padding: 0.75rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border: 1px solid var(--border-subtle);
}

.readout-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.readout-label {
  font-size: 0.65rem;
  color: var(--text-muted);
}

.readout-val {
  font-weight: 700;
  color: #ffffff;
}

/* ==========================================================================
   LABORATORY DASHBOARD / CARDS GRID
   ========================================================================== */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.lab-card {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  cursor: pointer;
  overflow: hidden;
}

.lab-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--border-medium), transparent);
  transition: background var(--transition-fast);
}

.lab-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow-amber);
}

.lab-card:hover::before {
  background: linear-gradient(90deg, var(--accent-amber), var(--accent-cyan));
}

.card-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-amber);
  margin-bottom: 1rem;
  display: inline-block;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card-subtitle {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-amber);
  transition: gap var(--transition-fast);
}

.lab-card:hover .card-link {
  gap: 0.7rem;
}

/* ==========================================================================
   "SEE THE DIFFERENCE" SECTION
   ========================================================================== */
.diff-section {
  padding: 4rem 0;
  background: rgba(18, 22, 31, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  margin: 4rem 0;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.diff-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
}

.diff-header {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.diff-compare-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.diff-side {
  background: rgba(0, 0, 0, 0.4);
  padding: 1rem 0.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.diff-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-amber);
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.diff-state {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0 2.25rem;
  margin-top: 4rem;
  position: relative;
  text-align: center;
}

.footer-simple-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}

.footer-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.footer-subtitle {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-amber);
  margin-bottom: 0.65rem;
}

.footer-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.footer-copyright {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  width: 100%;
}

/* Modals & Dialog Backdrop */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-backdrop.active {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  max-width: 650px;
  width: 100%;
  padding: 2rem;
  position: relative;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
}

.modal-close:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}