/* ===== KodaBloom LLC — Design System ===== */

:root {
  /* Lively palette — vibrant yet polished */
  --color-bg:        #0E1117;
  --color-surface:   #161B22;
  --color-surface-2: #1C2333;
  --color-text:      #E6EDF3;
  --color-text-muted:#8B949E;
  --color-accent:    #58A6FF;   /* electric blue  */
  --color-accent-hover: #79C0FF;
  --color-accent-2:  #F78166;   /* warm coral */
  --color-accent-3:  #D2A8FF;   /* soft violet */
  --color-accent-4:  #7EE787;   /* fresh green */
  --color-border:    #21262D;
  --color-card-shadow: rgba(0,0,0,0.3);
  --color-glow:      rgba(88, 166, 255, 0.15);

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --max-width: 1040px;
  --radius: 14px;
  --transition: 0.25s ease;
}

/* ===== Reset & Base ===== */

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== Layout ===== */

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 17, 23, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo img { width: 32px; height: 32px; border-radius: 8px; }

nav { display: flex; gap: 28px; }

nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

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

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-toggle span {
  display: block; width: 20px; height: 2px;
  background: var(--color-text); margin: 4px 0;
  transition: var(--transition);
}

/* ===== Hero ===== */

.hero {
  padding: 96px 0 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -60%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, var(--color-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--color-text), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto;
  position: relative;
}

/* ===== Section ===== */

.section {
  padding: 60px 0;
}

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* Category color dots */
.section-title .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.section-title .dot-blue    { background: var(--color-accent); }
.section-title .dot-coral   { background: var(--color-accent-2); }
.section-title .dot-green   { background: var(--color-accent-4); }

/* ===== App Grid (Portfolio) ===== */

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.app-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-3));
  opacity: 0;
  transition: opacity var(--transition);
}

.app-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 32px var(--color-card-shadow), 0 0 0 1px rgba(88,166,255,0.1);
  transform: translateY(-3px);
  color: inherit;
}

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

.app-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 13px;
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.app-card-icon img { width: 100%; height: 100%; object-fit: cover; }

.app-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.app-card .tag {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  width: fit-content;
}

/* Tag variants */
.tag-puzzle   { color: var(--color-accent);   background: rgba(88,166,255,0.1);  }
.tag-arcade   { color: var(--color-accent-2); background: rgba(247,129,102,0.1); }
.tag-brain    { color: var(--color-accent-3); background: rgba(210,168,255,0.1); }
.tag-strategy { color: var(--color-accent-3); background: rgba(210,168,255,0.1); }
.tag-fitness  { color: var(--color-accent-4); background: rgba(126,231,135,0.1); }
.tag-photo    { color: var(--color-accent-2); background: rgba(247,129,102,0.1); }
.tag-math     { color: var(--color-accent);   background: rgba(88,166,255,0.1);  }
.tag-language { color: var(--color-accent-4); background: rgba(126,231,135,0.1); }
.tag-adventure{ color: var(--color-accent-2); background: rgba(247,129,102,0.1); }
.tag-default  { color: var(--color-accent);   background: rgba(88,166,255,0.1);  }

.app-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ===== App Detail Page ===== */

.app-detail { padding: 48px 0 80px; }

.app-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 36px;
}

.app-detail-icon {
  width: 96px; height: 96px;
  border-radius: 22px;
  background: var(--color-surface-2);
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.app-detail-icon img { width: 100%; height: 100%; object-fit: cover; }

.app-detail-info h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-detail-info .tag {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
  margin-top: 8px;
}

.app-detail-body {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 640px;
}

.app-detail-body h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 32px 0 12px;
}

.app-detail-body ul {
  padding-left: 20px;
  margin: 8px 0;
}

.app-detail-body li {
  margin-bottom: 6px;
  color: var(--color-text-muted);
}

.app-detail-body li::marker { color: var(--color-accent); }

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--color-accent), #3b82f6);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 12px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn-appstore:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(88,166,255,0.25);
  color: #fff;
}

.btn-appstore svg { width: 20px; height: 20px; }

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.breadcrumb a { color: var(--color-accent); }
.breadcrumb span { margin: 0 6px; }

/* ===== Feature Showcase ===== */

.feature-showcase {
  margin-top: 48px;
  padding: 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
}

.feature-showcase::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2), var(--color-accent-3));
}

.feature-showcase h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-showcase h3 .badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, var(--color-accent-2), #e0604e);
  color: #fff;
  padding: 3px 8px;
  border-radius: 6px;
}

.feature-showcase p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
  max-width: 480px;
}

.autoplay-demo {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.autoplay-sequence {
  display: flex;
  gap: 8px;
  align-items: center;
}

.autoplay-arrow {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-accent);
  position: relative;
}

.autoplay-arrow.active {
  border-color: var(--color-accent-2);
  background: rgba(247,129,102,0.1);
  color: var(--color-accent-2);
  box-shadow: 0 0 12px rgba(247,129,102,0.2);
}

.autoplay-arrow .step {
  position: absolute;
  top: -6px; right: -6px;
  font-size: 0.6rem;
  font-weight: 700;
  background: var(--color-accent);
  color: #fff;
  width: 18px; height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.autoplay-label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 260px;
}

.autoplay-label strong {
  color: var(--color-text);
}

.seq-connector {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* ===== Screenshot Gallery ===== */

.screenshot-gallery {
  margin-top: 40px;
}

.screenshot-gallery h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.screenshot-row {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.screenshot-frame {
  flex-shrink: 0;
  width: 220px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  transition: transform var(--transition);
}

.screenshot-frame:hover { transform: scale(1.03); }

.screenshot-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  padding: 10px 14px;
  background: var(--color-surface);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  font-weight: 500;
}

/* ===== About ===== */

.about-content {
  max-width: 600px;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

.about-content p + p { margin-top: 16px; }

/* ===== Contact ===== */

.contact-content {
  max-width: 480px;
}

.contact-content p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.contact-content ul {
  color: var(--color-text-muted);
}

.contact-content li::marker { color: var(--color-accent); }

.contact-content h2 { color: var(--color-text); }

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 1rem;
  color: var(--color-accent);
  padding: 12px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-link:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 16px var(--color-glow);
  color: var(--color-accent-hover);
}

/* ===== Footer ===== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ===== Responsive ===== */

@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  .hero { padding: 56px 0 40px; }
  .section { padding: 40px 0; }

  nav { display: none; }
  nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    gap: 16px;
  }
  .mobile-toggle { display: block; }

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

  .app-detail-header { flex-direction: column; }

  .feature-showcase { padding: 24px; }
  .autoplay-demo { flex-direction: column; align-items: flex-start; }
  .screenshot-frame { width: 180px; }
}