/* ============================================================
   LAIKUN App Showcase — Apple App Store + Minimal
   ============================================================ */

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

:root {
  --bg: #f5f5f7;
  --surface: #fff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: #d2d2d7;
  --border-light: #e8e8ed;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.04);
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max-width: 1100px;
  --transition: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 32px; }

/* --- Header --- */
.app-header {
  position: sticky;
  top: 0; z-index: 100;
  background: rgba(245,245,247,0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
}
.back-link {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: opacity var(--transition);
}
.back-link:hover { opacity: 0.7; }
.header-center { flex: 1; text-align: center; }
.header-center h1 { font-size: 1rem; font-weight: 600; color: var(--text); }
.header-spacer { width: 80px; }

/* --- Hero Strip --- */
.app-hero { padding: 48px 0 32px; text-align: center; }
.app-hero h2 { font-size: 2.25rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 8px; }
.app-hero p { color: var(--text-secondary); font-size: 1rem; max-width: 480px; margin: 0 auto; }

/* --- Toolbar --- */
.app-toolbar { padding-bottom: 8px; }
.toolbar-inner { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.search-box {
  position: relative;
  flex: 1; min-width: 260px; max-width: 400px;
}
.search-icon {
  position: absolute;
  left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-tertiary); pointer-events: none;
}
.search-box input {
  width: 100%;
  padding: 12px 40px 12px 40px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: all var(--transition);
}
.search-box input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,113,227,0.1); }
.search-box input::placeholder { color: var(--text-tertiary); }
.search-clear {
  position: absolute;
  right: 12px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; padding: 4px;
  color: var(--text-tertiary); opacity: 0; transition: opacity var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.search-clear.visible { opacity: 1; }

.filter-group { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-btn {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--text); color: #fff; border-color: var(--text); }

.result-count {
  margin-top: 16px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* --- App Grid --- */
.app-grid-section { padding: 32px 0 80px; }
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.no-results { text-align: center; padding: 80px 0; color: var(--text-secondary); font-size: 1.125rem; }

/* --- App Card --- */
.app-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  cursor: pointer;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.app-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #6366f1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.app-card:hover::after { transform: scaleX(1); }
.app-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }

.app-card-icon {
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.app-card-icon.tool { background: #e8f4fd; color: #0071e3; }
.app-card-icon.life { background: #f0fdf4; color: #16a34a; }
.app-card-icon.platform { background: #fef3c7; color: #d97706; }

.app-card h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 6px; }
.app-card .app-type-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.app-type-tag.tool { background: #e8f4fd; color: #0071e3; }
.app-type-tag.life { background: #f0fdf4; color: #16a34a; }
.app-type-tag.platform { background: #fef3c7; color: #d97706; }

.app-card .app-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.app-card .app-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  width: 90%;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  padding: 48px 40px;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }

.modal-close {
  position: absolute;
  top: 20px; right: 20px;
  background: var(--bg); border: none; border-radius: 50%;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.modal-close:hover { background: #e0e0e0; color: var(--text); }

.modal-icon {
  width: 72px; height: 72px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}
.modal-icon.tool { background: #e8f4fd; color: #0071e3; }
.modal-icon.life { background: #f0fdf4; color: #16a34a; }
.modal-icon.platform { background: #fef3c7; color: #d97706; }

.modal h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.02em; }
.modal .modal-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.modal .modal-desc { color: var(--text-secondary); line-height: 1.7; margin-bottom: 24px; }
.modal .modal-features { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.modal .modal-features li {
  padding-left: 20px;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text);
}
.modal .modal-features li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--text);
  color: #fff;
  transition: all var(--transition);
}
.btn-download:hover { background: #333; transform: translateY(-1px); box-shadow: var(--shadow); }

.modal-tag.tool { background: #e8f4fd; color: #0071e3; }
.modal-tag.life { background: #f0fdf4; color: #16a34a; }
.modal-tag.platform { background: #fef3c7; color: #d97706; }

/* --- Footer --- */
.app-footer { padding: 24px 0; text-align: center; font-size: 0.8125rem; color: var(--text-tertiary); border-top: 1px solid var(--border-light); }

/* --- Responsive --- */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .app-hero { padding: 36px 0 24px; }
  .app-hero h2 { font-size: 1.75rem; }
  .toolbar-inner { flex-direction: column; align-items: stretch; }
  .search-box { max-width: 100%; }
  .app-grid { grid-template-columns: 1fr; }
  .modal { padding: 36px 24px; }
}