/* ====== Shortverse — Shared Design System ====== */

:root {
  /* Palette */
  --bg: #f5f5f7;
  --panel: #ffffff;
  --card: #ffffff;
  --border: #e5e5ea;
  --text: #1d1d1f;
  --text-dim: #86868b;
  --text-muted: #aeaeb2;
  --accent: #4f8cff;
  --accent-hover: #3b78f0;
  --accent-light: rgba(79,140,255,.08);
  --confirm: #34c759;
  --warning: #ff9f0a;
  --danger: #ff3b30;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.10);
  --shadow-xl: 0 20px 60px rgba(0,0,0,.12);

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Menlo", "Monaco", monospace;

  /* Transitions */
  --ease: cubic-bezier(.25,.1,.25,1);
  --spring: cubic-bezier(.34,1.56,.64,1);

  /* Legacy aliases */
  --success: var(--confirm);
  --pending: var(--warning);
  --reject: var(--danger);
  --btn-bg: #f5f5f7;
  --shadow: var(--shadow-sm);
  --shadow-md: var(--shadow-md);
  --shadow-lg: var(--shadow-lg);
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { opacity: .8; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c7c7cc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #a1a1a6; }

/* Animations */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
@keyframes slideDown { from { transform: translateY(-100%); } to { transform: translateY(0); } }
@keyframes toastIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(20px); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.5; } }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border: none; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500; font-family: var(--font);
  cursor: pointer; transition: all .15s var(--ease);
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap; user-select: none;
}
.btn:active { transform: scale(.97); }

.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--btn-bg); color: var(--text);
}
.btn-secondary:hover { background: #e8e8ed; }

.btn-ghost {
  background: transparent; color: var(--text-dim);
}
.btn-ghost:hover { background: var(--btn-bg); color: var(--text); }

.btn-danger {
  background: var(--danger); color: #fff;
}
.btn-danger:hover { opacity: .85; }

.btn-sm { padding: 5px 12px; font-size: 12px; border-radius: var(--radius-xs); }
.btn-lg { padding: 12px 24px; font-size: 15px; border-radius: var(--radius); }

.btn:disabled, .btn[disabled] {
  opacity: .4; cursor: not-allowed; pointer-events: none;
}

/* ── Form Inputs ── */
.input {
  padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 13px; font-family: var(--font); color: var(--text);
  background: var(--card); transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
  outline: none; width: 100%;
}
.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.input::placeholder { color: var(--text-muted); }

select.input { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%2386868b' stroke-width='1.5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }

textarea.input { resize: vertical; min-height: 80px; }

label.label {
  display: block; font-size: 12px; font-weight: 500; color: var(--text-dim);
  margin-bottom: 4px;
}

/* ── Cards ── */
.card {
  background: var(--card); border-radius: var(--radius); border: 1px solid var(--border);
  padding: var(--space-md); transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-interactive { cursor: pointer; }
.card-interactive:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ── Tabs ── */
.tabs {
  display: flex; gap: 4px; padding: 4px; background: var(--btn-bg);
  border-radius: var(--radius-sm);
}
.tab {
  padding: 7px 16px; border: none; background: transparent;
  color: var(--text-dim); font-size: 13px; font-weight: 500;
  border-radius: 6px; cursor: pointer; transition: all .2s var(--ease);
  font-family: var(--font);
  -webkit-tap-highlight-color: transparent;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: #fff; color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}

/* ── Badges ── */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: var(--radius-full);
  font-size: 11px; font-weight: 500;
}
.badge-public { background: #e8f5e9; color: #2e7d32; }
.badge-private { background: #f3e5f5; color: #7b1fa2; }
.badge-discover { background: var(--accent-light); color: var(--accent); }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,.4); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn .2s var(--ease);
}
.modal {
  background: var(--panel); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl); max-width: 600px; width: 90vw;
  max-height: 85vh; overflow-y: auto;
  animation: scaleIn .25s var(--spring);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-md) var(--space-lg); border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 17px; font-weight: 600; }
.modal-body { padding: var(--space-lg); }
.modal-footer {
  padding: var(--space-md) var(--space-lg); border-top: 1px solid var(--border);
  display: flex; justify-content: flex-end; gap: var(--space-sm);
}
.modal-close {
  width: 28px; height: 28px; border-radius: var(--radius-full);
  border: none; background: var(--btn-bg); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: 16px;
  transition: all .15s var(--ease);
}
.modal-close:hover { background: #e8e8ed; color: var(--text); }

/* ── Toast ── */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  padding: 12px 24px; border-radius: var(--radius-full);
  background: #1d1d1f; color: #fff; font-size: 13px; font-weight: 500;
  box-shadow: var(--shadow-lg); z-index: 2000;
  animation: toastIn .3s var(--ease);
  pointer-events: none;
}
.toast.toast-out { animation: toastOut .3s var(--ease) forwards; }
.toast-success { background: var(--confirm); }
.toast-error { background: var(--danger); }

/* ── Page Layout ── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 16px; position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  min-height: 48px;
}
.page-header-left { display: flex; align-items: center; gap: var(--space-md); }
.page-header-right { display: flex; align-items: center; gap: var(--space-sm); }

/* ── Unified Top Header (all pages) ── */
.top-header {
  display: flex; align-items: center; gap: var(--space-md);
  padding: 0 16px; height: 52px; flex-shrink: 0;
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.top-header-left { display: flex; align-items: center; gap: var(--space-sm); flex-shrink: 0; }
.top-header-right { display: flex; align-items: center; gap: var(--space-sm); flex-shrink: 0; }
.top-header-spacer { flex: 1; }

.top-nav { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.top-nav-item {
  display: inline-flex; align-items: center;
  padding: 6px 12px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 500; color: var(--text-dim);
  text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: color .15s var(--ease), background .15s var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.top-nav-item:hover { color: var(--text); background: var(--btn-bg); }
.top-nav-item.active { color: var(--accent); font-weight: 600; }

.top-nav-dropdown { position: relative; display: inline-flex; }
.top-nav-toggle { user-select: none; }
.top-nav-dropdown-menu {
  display: none; position: absolute; top: 100%; right: 0;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 6px 0; min-width: 120px;
  z-index: 1000; box-shadow: var(--shadow-md);
}
.top-nav-dropdown-menu.show { display: block; }
.top-nav-dropdown-item {
  display: block; padding: 7px 14px; color: var(--text-dim);
  font-size: 13px; text-decoration: none;
}
.top-nav-dropdown-item:hover { background: var(--btn-bg); color: var(--text); }

/* ── Unified User Area ── */
.user-area { display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0; }
.ua-login-link { font-size: 12px; color: var(--accent); text-decoration: none; }
.ua-user-info { display: inline-flex; align-items: center; gap: 8px; }
.ua-email { font-size: 12px; color: var(--text-dim); max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ua-tier-badge { font-size: 10px; padding: 1px 6px; border-radius: 8px; font-weight: 500; }
.ua-logout-btn {
  font-size: 11px; background: none; border: 1px solid var(--border);
  border-radius: 4px; padding: 2px 8px; cursor: pointer; color: var(--text-dim);
}
.ua-logout-btn:hover { background: var(--btn-bg); color: var(--text); }

.page-main {
  max-width: 1200px; margin: 0 auto; padding: var(--space-lg) var(--space-md) 60px;
}

.page-hero h1 { font-size: 28px; font-weight: 700; letter-spacing: -.02em; }
.page-hero p { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

/* ── Toolbar ── */
.toolbar {
  display: flex; align-items: center; gap: var(--space); flex-wrap: wrap;
  padding: 10px 16px; margin: 0;
  position: sticky; top: 52px; z-index: 99;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.toolbar .input { max-width: 280px; }

/* ── Grid ── */
.grid { display: grid; gap: var(--space-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* ── Loading Spinner ── */
.spinner {
  width: 20px; height: 20px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin .6s linear infinite;
}

/* ── Empty State ── */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-dim);
}
.empty-state-icon { font-size: 48px; margin-bottom: 16px; opacity: .4; }
.empty-state h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 13px; max-width: 360px; margin: 0 auto; }

/* ── Chip / Tag ── */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: var(--radius-full);
  font-size: 11px; font-weight: 500; background: var(--btn-bg); color: var(--text-dim);
}

/* ── Divider ── */
.divider { height: 1px; background: var(--border); margin: var(--space-md) 0; }

/* ── Storyboard prompter chips ── */
.sb-spec-chip {
  display: inline-flex; align-items: center;
  padding: 4px 12px; border-radius: 16px;
  font-size: 12px; font-weight: 500;
  background: var(--btn-bg); color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer; transition: all .15s;
  -webkit-tap-highlight-color: transparent;
}
.sb-spec-chip:hover, .sb-spec-chip:active { background: var(--accent); color: #fff; border-color: var(--accent); }

.sb-segment-chip {
  display: inline-flex; flex-direction: column;
  min-width: 120px; padding: 8px 10px;
  border-radius: 8px; background: var(--card);
  border: 1px solid var(--border);
  cursor: pointer; transition: all .15s;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.sb-segment-chip:hover, .sb-segment-chip:active { border-color: var(--accent); background: var(--accent-light); }
.sb-segment-time { font-size: 10px; color: var(--accent); font-weight: 600; margin-bottom: 3px; }
.sb-segment-camera { font-size: 11px; color: var(--text); line-height: 1.4; margin-bottom: 2px; }
.sb-segment-expr { font-size: 10px; color: var(--text-dim); line-height: 1.3; }

/* ── Utility ── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ── Responsive breakpoints ── */
@media (min-width: 768px) { .mobile-only { display: none !important; } }
@media (min-width: 1025px) { .tablet-only { display: none !important; } }
@media (max-width: 767px) {
  .desktop-only { display: none !important; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .page-hero h1 { font-size: 22px; }
  .toolbar .input { max-width: 100%; flex: 1; }

  /* Unified header — mobile */
  .top-header { padding: 0 12px; height: 48px; gap: var(--space-sm); }
  .top-nav { display: none; }
  .brand-subtitle { display: none; }
  .ua-email { max-width: 100px; }
}
@media (max-width: 480px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .page-main { padding: var(--space) var(--space-sm) 60px; }
  .modal { width: 95vw; border-radius: var(--radius); }
}