/* ===========================================================================
   app.css — single stylesheet for the template UI.
   Uses CSS custom properties defined in partials/theme.css.html.
   Layout strategy:
     - .app-shell: CSS grid sidebar + main
     - .auth-shell: centered card
   =========================================================================== */

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

html, body { margin: 0; padding: 0; }

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

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: rgba(0,0,0,.05);
  padding: 0 .25rem;
  border-radius: 4px;
}

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

/* ----- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .55rem 1rem;
  font: inherit;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent;
  color: inherit;
  border-color: currentColor;
  opacity: .85;
}
.btn-ghost:hover { opacity: 1; }
.btn-block { width: 100%; }
.btn-small { padding: .4rem .65rem; font-size: .85rem; }

/* ----- Forms ------------------------------------------------------------ */
.form { display: flex; flex-direction: column; gap: 1rem; }
.form-field { display: flex; flex-direction: column; gap: .35rem; }
.form-label { font-size: .85rem; font-weight: 600; color: var(--color-text-muted); }
.form-input {
  padding: .6rem .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font: inherit;
  color: var(--color-text);
}
.form-input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

/* ----- Flash / alerts --------------------------------------------------- */
.flash-stack { display: flex; flex-direction: column; gap: .5rem; padding: 1rem 1.5rem 0; }
.flash {
  padding: .65rem .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
.flash-info    { border-color: var(--color-primary); }
.flash-success { border-color: var(--color-success); background: color-mix(in srgb, var(--color-success) 12%, var(--color-surface)); }
.flash-warning { border-color: var(--color-warning); background: color-mix(in srgb, var(--color-warning) 14%, var(--color-surface)); }
.flash-danger  { border-color: var(--color-danger);  background: color-mix(in srgb, var(--color-danger)  12%, var(--color-surface)); }

/* ===========================================================================
   AUTH layout
   =========================================================================== */
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  background:
    radial-gradient(circle at 20% 0%, color-mix(in srgb, var(--color-primary) 18%, transparent), transparent 55%),
    var(--color-bg);
}
.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) * 1.5);
  padding: 2rem;
  box-shadow: 0 10px 40px -20px rgba(0,0,0,.25);
}
.auth-header { text-align: center; margin-bottom: 1.25rem; }
.auth-title { margin: .75rem 0 .25rem; font-size: 1.4rem; }
.auth-subtitle { margin: 0; color: var(--color-text-muted); font-size: .9rem; }
.auth-footer { text-align: center; color: var(--color-text-muted); margin-top: 1rem; }

/* ===========================================================================
   APP layout (sidebar + main)
   =========================================================================== */
.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}
.app-main { display: flex; flex-direction: column; min-width: 0; }
.app-content { padding: 1.5rem; flex: 1; }
.app-footer  { padding: 1rem 1.5rem; color: var(--color-text-muted); border-top: 1px solid var(--color-border); }

/* --- Sidebar ------------------------------------------------------------ */
.sidebar {
  background: var(--color-sidebar-bg);
  color: var(--color-sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 1rem .75rem;
  gap: 1rem;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .5rem .5rem 1rem;
  color: inherit;
  border-bottom: 1px solid color-mix(in srgb, var(--color-sidebar-text) 18%, transparent);
}
.sidebar-brand:hover { text-decoration: none; }
.sidebar-brand-text { display: flex; flex-direction: column; min-width: 0; }
.sidebar-brand-name { font-weight: 700; font-size: 1rem; }
.sidebar-brand-tag {
  font-size: .75rem;
  color: color-mix(in srgb, var(--color-sidebar-text) 70%, transparent);
}
.brand-logo {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  display: grid; place-items: center;
  flex-shrink: 0;
  overflow: hidden;
}
.brand-logo img { width: 100%; height: 100%; object-fit: contain; }
.brand-monogram { font-weight: 800; font-size: 1.1rem; }

.sidebar-section {
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .75rem .75rem .25rem;
  color: color-mix(in srgb, var(--color-sidebar-text) 55%, transparent);
}
.sidebar-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.sidebar-link {
  display: flex; align-items: center; gap: .65rem;
  padding: .55rem .75rem;
  border-radius: var(--radius);
  color: inherit;
  font-size: .92rem;
}
.sidebar-link:hover { background: var(--color-sidebar-active); text-decoration: none; }
.sidebar-link.is-active {
  background: var(--color-sidebar-active);
  color: var(--color-primary-contrast);
  border-left: 3px solid var(--color-primary);
  padding-left: calc(.75rem - 3px);
}
.sidebar-link.is-disabled {
  opacity: .58;
  cursor: not-allowed;
}
.nav-badge {
  margin-left: auto;
  font-size: .68rem;
  padding: .08rem .35rem;
  border: 1px solid currentColor;
  border-radius: 999px;
}
.sidebar-nav { flex: 1; overflow-y: auto; }
.sidebar-footer { padding-top: .5rem; }
.icon { width: 18px; height: 18px; display: inline-flex; }
.icon svg { width: 100%; height: 100%; }

/* --- Topbar ------------------------------------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .65rem 1.25rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.topbar-toggle {
  display: none;
  background: none;
  border: 0;
  padding: .35rem;
  border-radius: var(--radius);
  cursor: pointer;
  color: inherit;
}
.topbar-toggle svg { width: 22px; height: 22px; }
.topbar-spacer { flex: 1; }
.topbar-user { display: flex; align-items: center; gap: .65rem; }
.topbar-user-name { font-weight: 600; font-size: .9rem; }
.topbar-credits {
  font-size: .85rem;
  font-weight: 700;
  padding: .25rem .55rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
}
.topbar-user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  display: grid; place-items: center;
  font-weight: 700;
}
.topbar-logout { margin: 0; }

/* --- Page header / cards ----------------------------------------------- */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; margin-bottom: 1rem;
}
.page-title { margin: 0; font-size: 1.4rem; }
.page-subtitle { margin: .25rem 0 0; color: var(--color-text-muted); }
.page-actions { display: flex; gap: .5rem; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-border); }
.card-title { margin: 0; font-size: 1rem; }
.card-subtitle { margin: .25rem 0 0; font-size: .85rem; color: var(--color-text-muted); }
.card-body { padding: 1.25rem; }

.grid { display: grid; gap: 1rem; }
.grid-cols-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.bullets { margin: 0; padding-left: 1.1rem; }
.bullets li + li { margin-top: .35rem; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: .5rem 1rem; margin: 0; }
.kv dt { color: var(--color-text-muted); }
.kv dd { margin: 0; font-weight: 500; }

.swatch-grid { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.swatch { display: flex; align-items: center; gap: .65rem; padding: .5rem; border: 1px solid var(--color-border); border-radius: var(--radius); }
.swatch-chip { width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--color-border); }

.dashboard-grid { display: grid; gap: 1rem; }
.metric-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.metric-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.metric-label { color: var(--color-text-muted); font-size: .85rem; }
.metric-value { font-size: 2rem; line-height: 1; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}
.tool-card h2 { margin: .2rem 0 .5rem; font-size: 1.25rem; }
.tool-card p { margin: 0; color: var(--color-text-muted); max-width: 46ch; }
.tool-card.is-muted { background: color-mix(in srgb, var(--color-surface) 85%, var(--color-bg)); }
.tool-kicker { color: var(--color-primary); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
.status-pill {
  align-self: flex-start;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: .3rem .65rem;
  color: var(--color-text-muted);
  font-weight: 700;
}
.dashboard-library { min-width: 0; }
.video-list-compact { display: grid; gap: .5rem; }
.video-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: inherit;
}
.video-row:hover { text-decoration: none; border-color: var(--color-primary); }
.video-row small { display: block; color: var(--color-text-muted); margin-top: .15rem; }
.empty-state { margin: 0; color: var(--color-text-muted); }
.tool-form { display: grid; gap: 1rem; max-width: 980px; }
.control-grid,
.segmentation-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.segmentation-grid .form-field { min-width: 0; }
.choice-card {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface) 92%, var(--color-bg));
}
.choice-card input { margin-top: .2rem; }
.choice-card strong { display: block; }
.choice-card small { display: block; color: var(--color-text-muted); margin-top: .15rem; }
.tool-actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: .15rem .5rem;
  font-size: .78rem;
  font-weight: 700;
}
.badge-completed { border-color: var(--color-success); }
.badge-error { border-color: var(--color-danger); }
.badge-processing,
.badge-pending { border-color: var(--color-warning); }

/* ===========================================================================
   Responsive
   =========================================================================== */
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 260px;
    transform: translateX(-100%);
    transition: transform .2s ease;
    z-index: 30;
  }
  .app-shell.is-open .sidebar { transform: translateX(0); }
  .topbar-toggle { display: inline-flex; }
  .topbar-user { gap: .45rem; }
  .topbar-user-name { display: none; }
  .metric-strip,
  .tool-grid,
  .control-grid,
  .segmentation-grid { grid-template-columns: 1fr; }
}