/* ============================================
   DISKALKULI.COM — Platform Stylesheet
   Tanılamadan Müdahaleye Bilimsel Yaklaşım
   ============================================ */

/* ===== CSS RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg, video {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* ===== DESIGN TOKENS ===== */
:root {
  /* Backgrounds (deep space blend) */
  --bg-primary: #0A0E1F;
  --bg-secondary: #0F1428;
  --bg-card: #141A30;
  --bg-elevated: #1A2140;
  --bg-glass: rgba(20, 26, 48, 0.6);

  /* Borders */
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --border-accent: rgba(108, 99, 255, 0.3);

  /* Text */
  --text-primary: #F0F3FF;
  --text-secondary: #A8B0C8;
  --text-muted: #6A7390;

  /* Brand accents */
  --accent-purple: #6C63FF;          /* Galaksay primary */
  --accent-purple-dark: #4F46E5;
  --accent-blue: #3B82F6;            /* Numap primary */
  --accent-blue-dark: #1E40AF;
  --accent-teal: #00D4AA;            /* Galaksay teal */
  --accent-pink: #EC4899;

  /* Semantic */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;

  /* Gradients */
  --grad-galaxy: linear-gradient(135deg, #6C63FF 0%, #00D4AA 100%);
  --grad-numap: linear-gradient(135deg, #1E40AF 0%, #3B82F6 50%, #6C63FF 100%);
  --grad-hero: radial-gradient(ellipse at top, rgba(108, 99, 255, 0.15) 0%, transparent 60%),
               radial-gradient(ellipse at bottom right, rgba(0, 212, 170, 0.08) 0%, transparent 60%),
               var(--bg-primary);
  --grad-text: linear-gradient(135deg, #6C63FF 0%, #3B82F6 50%, #00D4AA 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
  --shadow-glow-purple: 0 0 40px rgba(108, 99, 255, 0.4);
  --shadow-glow-teal: 0 0 40px rgba(0, 212, 170, 0.3);
  --shadow-glow-blue: 0 0 40px rgba(59, 130, 246, 0.3);

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;
  --space-4xl: 8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --trans-fast: 0.15s ease;
  --trans-base: 0.25s ease;
  --trans-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1280px;
  --max-width-narrow: 900px;
  --nav-height: 72px;
}

/* ===== STARFIELD BACKGROUND ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(255,255,255,0.5), transparent),
    radial-gradient(2px 2px at 40% 80%, rgba(108, 99, 255, 0.6), transparent),
    radial-gradient(1px 1px at 90% 50%, rgba(0, 212, 170, 0.5), transparent),
    radial-gradient(1px 1px at 10% 90%, rgba(255,255,255,0.4), transparent),
    radial-gradient(2px 2px at 70% 15%, rgba(59, 130, 246, 0.4), transparent);
  background-size: 200% 200%;
  opacity: 0.7;
  z-index: -2;
  pointer-events: none;
  animation: starDrift 120s linear infinite;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--grad-hero);
  z-index: -1;
  pointer-events: none;
}

@keyframes starDrift {
  0% { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.2rem, 5vw + 1rem, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.8rem, 3vw + 1rem, 3rem);
}

h3 {
  font-size: clamp(1.3rem, 1.5vw + 0.8rem, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.lead {
  font-size: clamp(1.1rem, 1vw + 0.9rem, 1.35rem);
  color: var(--text-secondary);
  line-height: 1.6;
}

.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-purple { color: var(--accent-purple); }
.text-teal { color: var(--accent-teal); }
.text-blue { color: var(--accent-blue); }

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

section {
  padding: var(--space-4xl) 0;
  position: relative;
}

section.compact {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-purple);
  background: rgba(108, 99, 255, 0.1);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-accent);
  margin-bottom: var(--space-lg);
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10, 14, 31, 0.7);
  border-bottom: 1px solid var(--border);
  transition: background var(--trans-base);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.nav-logo {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--grad-galaxy);
  box-shadow: var(--shadow-glow-purple);
  font-size: 1.1rem;
  color: white;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--space-xs) 0;
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-galaxy);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--trans-fast);
  white-space: nowrap;
}

/* ===== TOP STRIP — main site navigation ===== */
.top-strip {
  background: linear-gradient(90deg, rgba(108,99,255,0.12), rgba(0,212,170,0.08));
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  position: relative;
  z-index: 101;
}
.top-strip-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}
.top-strip-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  transition: all var(--trans-fast);
}
.top-strip-back:hover {
  background: rgba(108,99,255,0.15);
  color: var(--accent-purple);
}
.top-strip-back svg { width: 14px; height: 14px; }
.top-strip-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.top-strip-links a {
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  transition: all var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
}
.top-strip-links a:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}
/* Push main nav down to account for strip */
body:has(.top-strip) .nav { top: 36px; }
body:has(.top-strip) .hero,
body:has(.top-strip) .app-hero { padding-top: calc(var(--nav-height) + 36px + var(--space-4xl)); }

@media (max-width: 700px) {
  .top-strip-inner { padding: 6px var(--space-md); font-size: 0.78rem; }
  .top-strip-links a span { display: none; }
  .top-strip-back span { display: none; }
  .top-strip-back::after { content: 'diskalkuli.com'; }
}

.nav-back:hover {
  color: var(--text-primary);
  border-color: var(--accent-teal);
  background: var(--bg-elevated);
}

.nav-back svg {
  width: 14px;
  height: 14px;
}

.lang-switcher {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 0;
}

.lang-btn {
  padding: 5px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: all var(--trans-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  background: var(--grad-galaxy);
  color: white;
  box-shadow: var(--shadow-glow-purple);
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: var(--trans-base);
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: var(--trans-base);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.85rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--trans-base);
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--trans-base);
}

.btn-primary {
  background: var(--grad-galaxy);
  color: white;
  box-shadow: var(--shadow-glow-purple);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 48px rgba(108, 99, 255, 0.6);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--accent-purple);
  transform: translateY(-2px);
}

.btn-numap {
  background: var(--grad-numap);
  color: white;
  box-shadow: var(--shadow-glow-blue);
}
.btn-numap:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 48px rgba(59, 130, 246, 0.6);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-card);
}

.btn-lg {
  padding: 1.1rem 2.2rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
}

/* ===== HERO ===== */
.hero {
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-4xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(108, 99, 255, 0.15), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease both;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 12px var(--accent-teal);
  animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease 0.1s both;
}

.hero .lead {
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-4xl);
  animation: fadeInUp 0.8s ease 0.5s both;
}

.stat-card {
  padding: var(--space-xl);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--trans-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== WORKFLOW ===== */
.workflow-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-top: var(--space-2xl);
}

.workflow-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--trans-slow);
  position: relative;
  overflow: hidden;
}

.workflow-step::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-galaxy);
  opacity: 0;
  transition: opacity var(--trans-base);
  z-index: 0;
}

.workflow-step > * {
  position: relative;
  z-index: 1;
}

.workflow-step:hover {
  transform: translateY(-6px);
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-glow-purple);
}

.workflow-step:hover::before {
  opacity: 0.05;
}

.workflow-number {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--grad-galaxy);
  display: inline-grid;
  place-items: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-glow-purple);
}

.workflow-step.numap .workflow-number {
  background: var(--grad-numap);
  box-shadow: var(--shadow-glow-blue);
}

.workflow-step.galaksay .workflow-number {
  background: linear-gradient(135deg, #6C63FF, #00D4AA);
}

.workflow-step h3 {
  margin-bottom: var(--space-md);
}

.workflow-step p {
  font-size: 0.95rem;
}

.workflow-arrow {
  color: var(--accent-purple);
  opacity: 0.6;
  display: grid;
  place-items: center;
  font-size: 2rem;
}

/* ===== APP CARDS ===== */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.app-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: all var(--trans-slow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 480px;
}

.app-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--trans-base);
  z-index: 0;
  pointer-events: none;
}

.app-card.numap-card::before {
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent 70%);
}

.app-card.galaksay-card::before {
  background: radial-gradient(circle at top right, rgba(108, 99, 255, 0.15), transparent 70%);
}

.app-card:hover::before {
  opacity: 1;
}

.app-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg);
}

.app-card.numap-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow-blue);
}

.app-card.galaksay-card:hover {
  border-color: var(--accent-purple);
  box-shadow: var(--shadow-glow-purple);
}

.app-card > * { position: relative; z-index: 1; }

.app-card-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  font-size: 2rem;
  margin-bottom: var(--space-lg);
}

.app-card.numap-card .app-card-icon {
  background: var(--grad-numap);
  box-shadow: var(--shadow-glow-blue);
}

.app-card.galaksay-card .app-card-icon {
  background: linear-gradient(135deg, #6C63FF, #00D4AA);
  box-shadow: var(--shadow-glow-purple);
}

.app-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.app-card.numap-card .app-card-tag {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.app-card.galaksay-card .app-card-tag {
  background: rgba(108, 99, 255, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(108, 99, 255, 0.3);
}

.app-card h3 {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
}

.app-card .app-desc {
  flex: 1;
  margin-bottom: var(--space-lg);
}

.app-card-features {
  list-style: none;
  margin-bottom: var(--space-xl);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.app-card-features li {
  font-size: 0.85rem;
  padding: 6px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
}

.app-card-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: auto;
}

/* ===== FEATURE GRID ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--trans-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  background: var(--bg-elevated);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid var(--border-accent);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.feature-card h4 {
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.95rem;
}

/* ===== MODULE LIST (for app detail pages) ===== */
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.module-item {
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transition: all var(--trans-fast);
}

.module-item:hover {
  border-color: var(--accent-purple);
  transform: translateX(4px);
}

.module-badge {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  display: grid;
  place-items: center;
  color: var(--accent-purple);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.module-item span {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ===== APP DETAIL HERO ===== */
.app-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  position: relative;
}

.app-hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-3xl);
  align-items: center;
}

.app-hero-content h1 {
  margin-bottom: var(--space-lg);
}

.app-hero-content .lead {
  margin-bottom: var(--space-xl);
}

.app-hero-content .app-card-tag {
  margin-bottom: var(--space-lg);
}

.app-hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.app-hero-preview {
  aspect-ratio: 16 / 11;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.app-hero-preview.numap-preview {
  background:
    radial-gradient(circle at 30% 40%, rgba(59, 130, 246, 0.25), transparent 60%),
    radial-gradient(circle at 70% 60%, rgba(108, 99, 255, 0.2), transparent 60%),
    var(--bg-card);
}

.app-hero-preview.galaksay-preview {
  background:
    radial-gradient(circle at 30% 30%, rgba(108, 99, 255, 0.3), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(0, 212, 170, 0.25), transparent 60%),
    var(--bg-card);
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 6rem;
  opacity: 0.9;
}

/* ===== EMBED MODAL ===== */
.embed-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 14, 31, 0.95);
  backdrop-filter: blur(20px);
  display: none;
  flex-direction: column;
}

.embed-modal.active {
  display: flex;
  animation: fadeIn 0.3s ease;
}

.embed-modal-header {
  height: 56px;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.embed-modal-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 0.95rem;
}

.embed-modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  transition: all var(--trans-fast);
}

.embed-modal-close:hover {
  background: var(--error);
  color: white;
}

.embed-modal-body {
  flex: 1;
  position: relative;
}

.embed-modal-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg-primary);
}

.embed-modal-actions {
  display: flex;
  gap: var(--space-sm);
}

.embed-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  pointer-events: none;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===== INLINE EMBED (for app detail pages) ===== */
.inline-embed {
  margin-top: var(--space-2xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  position: relative;
  background: var(--bg-secondary);
}

.inline-embed-toolbar {
  height: 44px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  gap: var(--space-md);
  border-bottom: 1px solid var(--border);
}

.traffic-lights {
  display: flex;
  gap: 6px;
}
.traffic-lights span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #444;
}
.traffic-lights span:nth-child(1) { background: #FF5F57; }
.traffic-lights span:nth-child(2) { background: #FEBC2E; }
.traffic-lights span:nth-child(3) { background: #28C840; }

.url-bar {
  flex: 1;
  padding: 6px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  border: 1px solid var(--border);
}

.embed-expand {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  transition: all var(--trans-fast);
  color: var(--text-secondary);
}
.embed-expand:hover {
  color: var(--accent-purple);
  border-color: var(--accent-purple);
}

.inline-embed iframe {
  display: block;
  width: 100%;
  height: 640px;
  border: 0;
  background: var(--bg-primary);
}

.embed-fallback {
  padding: var(--space-2xl);
  text-align: center;
}

/* ===== ABOUT / PROFILE ===== */
.profile-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-2xl);
  padding: var(--space-2xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  align-items: center;
}

.profile-avatar {
  width: 220px;
  height: 220px;
  border-radius: var(--radius-xl);
  background: var(--grad-galaxy);
  display: grid;
  place-items: center;
  color: white;
  font-size: 4rem;
  font-weight: 800;
  box-shadow: var(--shadow-glow-purple);
}

.profile-name {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.profile-title {
  color: var(--accent-purple);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.profile-bio {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.contact-card {
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--trans-base);
}

.contact-card:hover {
  border-color: var(--accent-purple);
  transform: translateY(-4px);
}

.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--grad-galaxy);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  color: white;
  margin: 0 auto var(--space-md);
  box-shadow: var(--shadow-glow-purple);
}

.contact-card h4 {
  margin-bottom: var(--space-xs);
}

.contact-card a {
  color: var(--accent-teal);
  font-weight: 500;
  font-size: 0.95rem;
}
.contact-card a:hover {
  color: var(--accent-purple);
}

/* ===== SHOP BANNER (link to main WP site) ===== */
.shop-banner {
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.08), rgba(0, 212, 170, 0.05));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-xl);
  align-items: center;
  margin: var(--space-3xl) 0 0;
}

.shop-banner-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--grad-galaxy);
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  box-shadow: var(--shadow-glow-purple);
}

.shop-banner-content h3 {
  margin-bottom: var(--space-xs);
}

.shop-banner-content p {
  font-size: 0.95rem;
  margin: 0;
}

@media (max-width: 700px) {
  .shop-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .shop-banner-icon { margin: 0 auto; }
  .shop-banner .btn { width: 100%; }
}

/* ===== CTA SECTION ===== */
.cta {
  background:
    radial-gradient(circle at 20% 50%, rgba(108, 99, 255, 0.2), transparent 60%),
    radial-gradient(circle at 80% 50%, rgba(0, 212, 170, 0.15), transparent 60%),
    var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-xl);
  text-align: center;
  margin: var(--space-3xl) 0;
}

.cta h2 {
  margin-bottom: var(--space-md);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--space-2xl) 0 var(--space-lg);
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  margin-top: var(--space-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.footer-about {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-col h5 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: var(--space-sm);
}

.footer-col a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--accent-purple);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.3); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-back {
    padding: 5px 10px;
    font-size: 0.75rem;
  }
  .nav-back span { display: none; }
  .nav-back::after { content: 'diskalkuli.com'; }
  .nav.menu-open .nav-links {
    display: flex;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
    gap: var(--space-md);
  }

  .app-hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .workflow-grid {
    grid-template-columns: 1fr;
  }

  .workflow-arrow {
    transform: rotate(90deg);
    margin: 0 auto;
  }

  .profile-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .profile-avatar {
    margin: 0 auto;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .footer-brand-col {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  section { padding: var(--space-3xl) 0; }
  .hero { padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .app-card { min-height: auto; padding: var(--space-xl); }
  .app-card-actions { flex-direction: column; }
  .app-card-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand-col { grid-column: span 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .inline-embed iframe { height: 480px; }
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

[hidden] { display: none !important; }