/* ==========================================================================
   PROJECT 04 • MIFFUSER PRODUCT DESIGN CASE STUDY & PWA
   Designer: Sohaib Ahmer (Film & Video Communication)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg-dark: #090D16;          /* Darkest Navy Noir */
  --bg-card: rgba(18, 24, 42, 0.75);
  --bg-surface: #121829;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(240, 192, 64, 0.3); /* Gold Glow Accent */

  --accent-gold: #F0C040;
  --accent-navy: #1A1F3E;
  --accent-red: #E8284A;
  --accent-green: #7FC44C;
  --accent-blue: #6A8CC8;

  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-tertiary: #64748B;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --shadow-glow: 0 0 40px rgba(240, 192, 64, 0.15);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(240, 192, 64, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(106, 140, 200, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(18, 24, 42, 0.9) 0%, var(--bg-dark) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* FLOATING HEADER NAV WITH EXIT BUTTON & LIVE APP LINK */
.floating-header-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 1040px;
  height: 60px;
  background: rgba(18, 24, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.brand-stamp {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-stamp-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #F0C040 0%, #E8284A 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 13px;
  color: #1A1F3E;
  letter-spacing: -0.02em;
}

.brand-stamp-text {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.header-right-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-live-app-btn {
  padding: 8px 18px;
  background: var(--accent-gold);
  border-radius: var(--radius-pill);
  color: #1A1F3E;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(240, 192, 64, 0.3);
}

.header-live-app-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(240, 192, 64, 0.45);
}

.header-exit-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-exit-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* WIDE PAGE CONTAINER */
.page-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 130px 24px 80px;
}

/* HERO SECTION */
.hero-section {
  text-align: center;
  margin-bottom: 70px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(240, 192, 64, 0.1);
  border: 1px solid rgba(240, 192, 64, 0.3);
  border-radius: var(--radius-pill);
  color: var(--accent-gold);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.festival-subhead {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.main-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #FFFFFF;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F0C040 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

/* METRICS GRID */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow-glow);
  transition: transform 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
}

.metric-value {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 4px;
}

.metric-value .unit {
  font-size: 16px;
  font-weight: 700;
  margin-left: 2px;
  color: var(--text-secondary);
}

.metric-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* TECH TAGS ROW */
.tech-tags-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
}

.tech-tag {
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.tech-tag.highlight {
  background: rgba(240, 192, 64, 0.15);
  border-color: rgba(240, 192, 64, 0.4);
  color: var(--accent-gold);
}

.tech-tag.mode {
  background: rgba(232, 40, 74, 0.15);
  border-color: rgba(232, 40, 74, 0.4);
  color: #FCA5A5;
}

/* MOBILE DEVICE PREVIEW CONTAINER (DEFAULT MOBILE VIEW) */
.mobile-preview-container {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.mobile-device-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.device-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.device-dots .dot.red { background: #FF5F56; }
.device-dots .dot.yellow { background: #FFBD2E; }
.device-dots .dot.green { background: #27C93F; }

.device-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.device-launch-btn {
  padding: 6px 14px;
  background: rgba(240, 192, 64, 0.15);
  border: 1px solid rgba(240, 192, 64, 0.3);
  border-radius: var(--radius-pill);
  color: var(--accent-gold);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.device-launch-btn:hover {
  background: var(--accent-gold);
  color: #1A1F3E;
}

/* REALISTIC SMARTPHONE FRAME MOCKUP */
.phone-frame-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
}

.phone-frame {
  position: relative;
  width: 380px;
  height: 760px;
  background: #000;
  border: 10px solid #1E293B;
  border-radius: 36px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7), 0 0 30px rgba(240, 192, 64, 0.15);
  overflow: hidden;
}

.phone-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #0B0F19;
}

/* CASE STUDY CHAPTER SECTIONS */
.case-section {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-lg);
}

.section-num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-heading {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* STATS MINI BAR */
.stats-mini-bar {
  display: flex;
  gap: 24px;
  margin-top: 28px;
  padding: 20px;
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-item .num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent-gold);
}

.stat-item .lbl {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

/* ARCHITECTURE TABLE */
.table-wrapper {
  overflow-x: auto;
  margin-top: 24px;
}

.arch-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.arch-table th {
  background: rgba(26, 31, 62, 0.8);
  color: var(--accent-gold);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.arch-table td {
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.arch-table td code {
  background: rgba(240, 192, 64, 0.1);
  color: var(--accent-gold);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 13px;
}

/* CALLOUT BOX */
.callout-box {
  margin-top: 28px;
  padding: 24px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-gold);
  background: rgba(240, 192, 64, 0.06);
}

.callout-box.accent-blue {
  border-left-color: var(--accent-blue);
  background: rgba(106, 140, 200, 0.08);
}

.callout-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 16px;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.quote-box {
  margin-top: 32px;
  padding: 24px 32px;
  background: rgba(26, 31, 62, 0.5);
  border-radius: var(--radius-md);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.5;
  border: 1px solid var(--border-subtle);
}

.quote-sub {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* FEATURES GRID 2COL */
.features-grid-2col,
.grid-2col-list,
.decisions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.feature-card,
.list-item-card,
.decision-card {
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.card-tag {
  font-size: 10px;
  font-weight: 800;
  color: var(--accent-gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.feature-card h3,
.list-item-card h4,
.decision-card h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.feature-card p,
.list-item-card p,
.decision-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.principles-dual-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.principle-box {
  padding: 20px;
  background: rgba(232, 40, 74, 0.06);
  border-left: 4px solid var(--accent-red);
  border-radius: var(--radius-md);
}

.principle-box h5 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 15px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.principle-box p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* COLOR TOKENS GRID */
.color-tokens-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.color-token-card {
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.token-swatch {
  width: 100%;
  height: 48px;
  border-radius: 8px;
  margin-bottom: 12px;
}

.token-name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 14px;
  font-weight: 800;
  color: #FFFFFF;
}

.token-role {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* ABOUT CARD & LAUNCH ROW */
.about-card {
  border-color: var(--border-glow);
}

.about-action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.btn-live-launch {
  padding: 16px 32px;
  background: linear-gradient(135deg, #F0C040 0%, #E8284A 100%);
  border-radius: var(--radius-pill);
  color: #1A1F3E;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 15px;
  font-weight: 800;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 8px 24px rgba(240, 192, 64, 0.35);
}

.btn-live-launch:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(240, 192, 64, 0.5);
}

.festival-date-tag {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
}

.app-footer {
  text-align: center;
  margin-top: 60px;
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

@media (max-width: 840px) {
  .floating-header-nav {
    position: fixed !important;
    top: 10px !important;
    left: 10px !important;
    right: 10px !important;
    width: auto !important;
    max-width: calc(100vw - 20px) !important;
    transform: none !important;
    padding: 8px 12px !important;
    box-sizing: border-box !important;
    margin: 0 !important;
  }
  .page-container {
    width: 100% !important;
    max-width: 100vw !important;
    padding: 80px 16px 40px !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
  }
  .hero-section { padding: 30px 0 20px; }
  .main-title { font-size: 26px; letter-spacing: -0.02em; line-height: 1.25; }
  .hero-tagline { font-size: 14.5px; }

  .metrics-grid, .color-tokens-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .features-grid-2col, .grid-2col-list, .principles-dual-row, .decisions-grid { grid-template-columns: 1fr; gap: 14px; }
  .about-action-row { flex-direction: column; align-items: flex-start; gap: 10px; }

  .mobile-preview-container { padding: 14px 10px; }
  .phone-screen-container { width: 100%; display: flex; justify-content: center; }
  .phone-frame { width: 300px; height: 580px; max-width: 100%; }

  .chapter-card { padding: 18px 14px; }
  .chapter-title { font-size: 19px; }
  .header-live-app-btn { font-size: 11px; padding: 5px 10px; }
}

@media (max-width: 480px) {
  .metrics-grid, .color-tokens-grid { grid-template-columns: 1fr; }
  .main-title { font-size: 22px; }
  .phone-frame { width: 100%; height: 520px; }
  .header-exit-btn span:first-child { display: none; }
}