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

:root {
  --bg-start: #0f172a;
  --bg-end: #020617;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --glass-bg: rgba(30, 41, 59, 0.4);
  --glass-border: rgba(255, 255, 255, 0.05);
  --card-bg: rgba(30, 41, 59, 0.6);
  --accent: #38bdf8;
  --radius: 16px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: radial-gradient(circle at 20% 20%, var(--bg-start), var(--bg-end));
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #1e293b; }
::-webkit-scrollbar-thumb { background: #475569; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #64748b; }

.glass-panel {
  backdrop-filter: blur(16px);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* ---------- Main Grid Layout ---------- */
.app-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 100px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* ---------- Header (desktop) ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 8px;
}
.app-header .title-group {
  flex: 1;
  text-align: center;
}
.app-header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, #e2e8f0, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
/* Desktop Activity button */
.activity-btn-desktop {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-primary);
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition);
}
.activity-btn-desktop:hover {
  background: rgba(255,255,255,0.15);
}

/* Sorting Tabs */
.sort-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0;
}
.sort-tab {
  padding: 8px 18px;
  border-radius: 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.sort-tab.active {
  background: var(--accent);
  color: #0f172a;
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(56,189,248,0.3);
}

/* Vent Form */
.vent-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
}
.vent-form textarea,
.vent-form input[type="text"] {
  width: 100%;
  background: rgba(15,23,42,0.5);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 16px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border var(--transition), box-shadow var(--transition);
}
.vent-form textarea:focus,
.vent-form input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.2);
}
.char-counter {
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.mood-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.mood-btn {
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.mood-btn.active {
  border-color: var(--accent);
  background: rgba(56,189,248,0.15);
}
.color-swatches {
  display: flex;
  gap: 10px;
}
.swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), border var(--transition);
}
.swatch.active {
  border-color: white;
  transform: scale(1.2);
}

/* Generic button */
.btn-load {
  padding: 10px 24px;
  font-weight: 600;
  border-radius: 24px;
  background: rgba(255,255,255,0.1);
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}
.btn-load:hover {
  background: rgba(255,255,255,0.15);
}
/* Accent submit button (for “Drop Your Vent”) */
.btn-submit {
  background: var(--accent) !important;
  color: #0f172a !important;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(56,189,248,0.3);
}
.btn-submit:hover {
  background: #0ea5e9 !important;
  box-shadow: 0 6px 20px rgba(56,189,248,0.5);
}
.btn-submit:disabled {
  opacity: 0.6;
  box-shadow: none;
}

/* Feed */
.feed {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Vent Card */
.vent-card {
  padding: 18px 20px;
  border-left: 4px solid var(--card-color, #06b6d4);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeInUp 0.4s ease both;
}
.vent-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.4), 0 0 15px rgba(var(--card-rgb), 0.3);
}
.vent-message {
  font-size: 1.05rem;
  word-wrap: break-word;
  margin-bottom: 12px;
}
.vent-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.vent-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.vent-actions button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}
.vent-actions button:hover {
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 8px rgba(255,255,255,0.1);
}
.vent-actions button:disabled {
  opacity: 0.5;
  cursor: default;
}

/* Skeleton Loading */
.skeleton-card {
  padding: 18px 20px;
  border-radius: var(--radius);
  background: rgba(30,41,59,0.3);
  border: 1px solid rgba(255,255,255,0.03);
  overflow: hidden;
}
.skeleton-line {
  height: 14px;
  background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
  margin-bottom: 12px;
}
.skeleton-line.wide { width: 90%; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.short { width: 40%; }
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Share & Delete */
.share-btn, .delete-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.share-btn:hover { color: var(--accent); }
.delete-btn:hover { color: #ef4444; }

/* ---------- Mobile Only Elements (hidden on desktop) ---------- */
.bottom-nav,
.fab {
  display: none;                   /* never visible on desktop */
}

/* Mobile Form Overlay (hidden on desktop) */
.form-overlay {
  display: none;                   /* starts hidden */
}

@media (max-width: 768px) {
  .app-container {
    padding-bottom: 120px;
  }
  /* Hide desktop Activity button on mobile */
  .activity-btn-desktop {
    display: none;
  }
  /* Show bottom nav */
  .bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(15,23,42,0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255,255,255,0.05);
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    padding: 0 24px;
  }
  .nav-item {
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.75rem;
    gap: 2px;
    background: none;
    border: none;
    cursor: pointer;
  }
  .nav-item.active {
    color: var(--accent);
  }
  /* Show FAB */
  .fab {
    display: flex;
    position: fixed;
    bottom: 88px;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: #0f172a;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(56,189,248,0.4);
    z-index: 101;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition);
  }
  .fab:hover { transform: translateX(-50%) scale(1.05); }
  .vent-form.desktop-only { display: none; }

  /* Show form overlay block */
  .form-overlay {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(15,23,42,0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px 24px 0 0;
    padding: 24px 20px 120px;
    z-index: 110;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    max-height: 85vh;
    overflow-y: auto;
  }
  .form-overlay.active { transform: translateY(0); }
  .form-overlay-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 5;
  }
}

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

/* View Page */
.vent-detail { padding: 24px; }
.replies-section { margin-top: 30px; }
.reply-item {
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  margin-bottom: 12px;
}
.reply-alias { font-weight: 600; margin-bottom: 4px; }
.reply-time { font-size: 0.8rem; color: var(--text-secondary); }