/* ============================================================
   SLIDE HUB — Apple Aesthetic & Secure Vault
   Minimalist Luxury (Light / Dark)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---- CSS Variables (Apple Palette) ---- */
:root[data-theme="light"] {
  --bg-base:       #ffffff;
  --bg-surface:    #f5f5f7;
  --bg-elevated:   #ffffff;
  --bg-hover:      #fbfbfd;
  --border:        #e5e5e7;
  --border-hover:  #d2d2d7;

  --accent:        #0066cc; /* Apple Blue */
  --accent-glow:   rgba(0, 102, 204, 0.08);
  --accent-strong: #0071e3;
  --favorite:      #ff2d55; /* Apple Red */

  --text-primary:  #1d1d1f;
  --text-secondary:#86868b;
  --text-muted:    #a1a1a6;

  --shadow-card:   0 8px 16px rgba(0,0,0,0.06);
  --shadow-modal:  0 20px 40px rgba(0,0,0,0.12);
}

:root[data-theme="dark"] {
  --bg-base:       #000000;
  --bg-surface:    #161617;
  --bg-elevated:   #1d1d1f;
  --bg-hover:      #2c2c2e;
  --border:        #333333;
  --border-hover:  #424245;

  --accent:        #2997ff;
  --accent-glow:   rgba(41, 151, 255, 0.12);
  --accent-strong: #54a9ff;
  --favorite:      #ff375f;

  --text-primary:  #f5f5f7;
  --text-secondary:#86868b;
  --text-muted:    #424245;

  --shadow-card:   0 8px 16px rgba(0,0,0,0.4);
  --shadow-modal:  0 20px 40px rgba(0,0,0,0.6);
}

:root {
  --radius-sm:     8px;
  --radius-md:     12px;
  --radius-lg:     18px;
  --transition:    all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-apple:    'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  font-family: var(--font-apple);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
  transition: background-color 0.4s ease;
}

/* ============================================================
   SECURITY LOCK SCREEN
   ============================================================ */
#lock-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-surface);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#lock-screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(1.02);
}

.lock-box {
  width: 100%;
  max-width: 320px;
  text-align: center;
}

.lock-icon {
  font-size: 48px;
  margin-bottom: 1.5rem;
  display: block;
}

.lock-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.lock-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.lock-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 16px;
  text-align: center;
  outline: none;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.lock-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn-auth {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-auth:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(var(--bg-base-rgb), 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
}

.logo {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-decoration: none;
  color: var(--text-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.nav-link:hover { color: var(--text-primary); }

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
}

/* ============================================================
   HERO section
   ============================================================ */
.hero {
  max-width: 800px;
  margin: 5rem auto 3rem;
  text-align: center;
  padding: 0 2rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.2rem;
}

.hero-sub {
  font-size: 1.3rem;
  color: var(--text-secondary);
  line-height: 1.5;
  font-weight: 400;
}

/* ============================================================
   FILTER & TOOLS
   ============================================================ */
.tools-bar {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.filter-group::-webkit-scrollbar { display: none; }

.filter-chip {
  padding: 6px 14px;
  background: var(--bg-surface);
  border-radius: 980px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.filter-chip:hover { background: var(--border); }

.filter-chip.active {
  background: var(--text-primary);
  color: var(--bg-base);
}

/* =-------------- Search & Fav Tag ----------------- */
.search-input {
  margin-left: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.82rem;
  outline: none;
  color: var(--text-primary);
  width: 180px;
  transition: var(--transition);
}

.search-input:focus {
  width: 240px;
  border-color: var(--accent);
}

/* ============================================================
   GRID & CARDS
   ============================================================ */
.grid-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 22px 5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}

.slide-card {
  background: var(--bg-base);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
  border: 1.5px solid var(--border);
}

.slide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--border-hover);
}

.thumb-wrap {
  aspect-ratio: 16/9;
  width: 100%;
  background: var(--bg-surface);
  position: relative;
  overflow: hidden;
}

.thumb-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(var(--bg-base-rgb), 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
  cursor: pointer;
}

.slide-card:hover .card-overlay {
  background: rgba(0,0,0,0.02);
}

.btn-favorite {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
  z-index: 10;
}

.slide-card.is-fav .btn-favorite {
  color: var(--favorite);
}

.card-info {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
}

.card-name {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.card-tag {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ============================================================
   MODAL (PRO DESIGN)
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-content {
  background: var(--bg-base);
  width: 100%;
  height: 100%;
  max-width: 1040px;
  max-height: 80vh;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-modal);
}

.modal-header {
  height: 52px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.modal-tabs {
  display: flex;
  gap: 1.5rem;
}

.tab-btn {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  padding: 16px 0;
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}

/* ============================================================
   TOAST & ANIMATIONS
   ============================================================ */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-primary);
  color: var(--bg-base);
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 640px) {
  .hero-title { font-size: 2.2rem; }
  .grid-container { grid-template-columns: 1fr; }
  .btn-favorite { top: auto; bottom: 12px; }
}