/* =========================================================================
   PromptForge AI — Design System
   Concept: a digital forge. Prompts are "forged" from raw requirements.
   Dark mode = the forge at night (charcoal + ember glow).
   Light mode = tempered steel in daylight (cool platinum + warm ember).
   ========================================================================= */

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

:root {
  /* ---- Dark theme (default) ---- */
  --bg: #12151a;
  --bg-elevated: #171b21;
  --panel: #1b2028;
  --panel-2: #212832;
  --border: #2a323d;
  --border-soft: #232a33;
  --text: #eae7e1;
  --text-dim: #9aa4b0;
  --text-faint: #667080;

  --ember: #ff7a45;
  --ember-2: #ffb27a;
  --ember-glow: rgba(255, 122, 69, 0.35);
  --steel: #5fa8c9;
  --steel-2: #8fc6de;
  --success: #4caf7d;
  --danger: #e5636a;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-panel: 0 1px 0 rgba(255,255,255,0.02) inset, 0 8px 24px rgba(0,0,0,0.35);
  --transition: 160ms ease;
}

[data-theme="light"] {
  --bg: #f5f3ee;
  --bg-elevated: #ffffff;
  --panel: #ffffff;
  --panel-2: #f0ede5;
  --border: #e2ddd0;
  --border-soft: #ebe6da;
  --text: #1d2126;
  --text-dim: #5c6774;
  --text-faint: #88919b;

  --ember: #d9531f;
  --ember-2: #ff8a4c;
  --ember-glow: rgba(217, 83, 31, 0.18);
  --steel: #256384;
  --steel-2: #3f87ab;
  --success: #2f8a5e;
  --danger: #c73f47;

  --shadow-panel: 0 1px 0 rgba(255,255,255,0.6) inset, 0 8px 24px rgba(30,20,10,0.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; letter-spacing: -0.01em; }
a { color: inherit; }
button { font-family: var(--font-body); cursor: pointer; }
::selection { background: var(--ember-glow); }

/* Focus visibility (accessibility) */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------------------------------------------------------------------
   App shell
   --------------------------------------------------------------------- */
.app-shell {
  display: grid;
  grid-template-columns: 272px 1fr;
  grid-template-rows: 64px 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* ---- Top bar ---- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  position: sticky; top: 0; z-index: 40;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 34px; height: 34px; flex: none; position: relative;
}
.brand-mark svg { width: 100%; height: 100%; display: block; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: -0.02em; }
.brand-sub { font-size: 10.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.08em; margin-top: -2px; }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel); color: var(--text-dim);
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.icon-btn:hover { color: var(--text); border-color: var(--ember); }
.icon-btn svg { width: 18px; height: 18px; }

.plan-badge {
  font-size: 11px; font-weight: 600; padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em;
}
.plan-badge.premium { color: #171b21; background: linear-gradient(135deg, var(--ember-2), var(--ember)); border-color: transparent; }

.upgrade-btn {
  font-size: 13px; font-weight: 600; padding: 9px 14px; border-radius: var(--radius-sm);
  border: none; background: linear-gradient(135deg, var(--ember), #c8471f); color: white;
  box-shadow: 0 2px 10px var(--ember-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.upgrade-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 16px var(--ember-glow); }

/* ---- Sidebar ---- */
.sidebar {
  grid-area: sidebar;
  border-right: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 16px 10px 20px;
  overflow-y: auto;
}
.sidebar-group { margin-bottom: 4px; }
.sidebar-group-label {
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-faint); padding: 14px 10px 6px;
}
.category-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%; text-align: left; padding: 9px 10px; border-radius: var(--radius-sm);
  border: 1px solid transparent; background: transparent; color: var(--text-dim);
  font-size: 13.5px; font-weight: 500; position: relative;
  transition: background var(--transition), color var(--transition);
}
.category-item:hover { background: var(--panel-2); color: var(--text); }
.category-item.active { background: var(--panel-2); color: var(--text); border-color: var(--border); }
.category-item.active::before {
  content: ""; position: absolute; left: -10px; top: 8px; bottom: 8px; width: 3px;
  background: linear-gradient(var(--ember), var(--ember-2)); border-radius: 3px;
}
.category-item .cat-icon { width: 17px; height: 17px; flex: none; color: var(--text-faint); }
.category-item.active .cat-icon { color: var(--ember); }
.category-item .lock { margin-left: auto; width: 13px; height: 13px; color: var(--text-faint); flex: none; }

/* ---- Main ---- */
.main {
  grid-area: main;
  padding: 22px 26px 60px;
  overflow-y: auto;
}
.workbench-header { margin-bottom: 18px; }
.workbench-eyebrow { font-size: 11.5px; color: var(--ember); font-weight: 700; text-transform: uppercase; letter-spacing: 0.09em; margin-bottom: 6px; display:flex; gap:8px; align-items:center;}
.workbench-title { font-size: 26px; font-weight: 700; }
.workbench-tagline { color: var(--text-dim); margin-top: 6px; font-size: 14px; }

.flow-steps { display:flex; gap: 18px; margin: 18px 0 22px; flex-wrap: wrap; }
.flow-step { display:flex; align-items:center; gap:8px; font-size:12.5px; color: var(--text-faint); font-weight:600;}
.flow-step .dot { width:7px; height:7px; border-radius:50%; background: var(--border);}
.flow-step.active { color: var(--text); }
.flow-step.active .dot { background: var(--ember); box-shadow: 0 0 0 4px var(--ember-glow); }
.flow-sep { color: var(--border); }

.workbench-grid {
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap: 20px;
  align-items: start;
}
@media (max-width: 980px) {
  .workbench-grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border-soft);
}
.panel-header h3 { font-size: 14.5px; font-weight: 700; display:flex; align-items:center; gap:8px;}
.panel-body { padding: 18px; }

/* Form */
.field { margin-bottom: 16px; }
.field label { display:flex; justify-content:space-between; font-size: 12.5px; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; }
.field label .req { color: var(--ember); }
.field input[type="text"], .field textarea, .field select {
  width: 100%; background: var(--bg-elevated); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; font-size: 13.5px; font-family: var(--font-body);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field textarea { min-height: 76px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--ember); box-shadow: 0 0 0 3px var(--ember-glow); outline: none;
}
.field-error { color: var(--danger); font-size: 11.5px; margin-top: 5px; display:none; }
.field.has-error input, .field.has-error textarea, .field.has-error select { border-color: var(--danger); }
.field.has-error .field-error { display: block; }

.range-row { display:flex; align-items:center; gap:10px; }
.range-row input[type="range"] { flex:1; accent-color: var(--ember); }
.range-value { font-size: 12px; color: var(--text-faint); min-width: 150px; text-align:right; font-family: var(--font-mono); }

.form-actions { display:flex; gap: 10px; margin-top: 6px; flex-wrap: wrap; }

.btn {
  display:inline-flex; align-items:center; gap:8px; justify-content:center;
  padding: 11px 16px; border-radius: var(--radius-sm); font-size: 13.5px; font-weight: 600;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.btn svg { width:15px; height:15px; }
.btn:hover { border-color: var(--text-faint); }
.btn.btn-primary {
  border: none; color: white; position: relative; overflow: visible;
  background: linear-gradient(135deg, var(--ember-2), var(--ember) 60%, #b8431f);
  box-shadow: 0 4px 18px var(--ember-glow);
}
.btn.btn-primary:hover { transform: translateY(-1px); }
.btn.btn-primary:active { transform: translateY(0); }
.btn.btn-ghost { background: transparent; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform:none !important; }

/* Spark burst on generate (signature micro-interaction) */
.spark { position:absolute; width:4px; height:4px; border-radius:50%; background: var(--ember-2); pointer-events:none; opacity:0; }
@keyframes spark-fly {
  0% { opacity: 1; transform: translate(0,0) scale(1); }
  100% { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(0.3); }
}
.spark.fly { animation: spark-fly 650ms ease-out forwards; }

/* Output panel */
.output-empty { padding: 40px 18px; text-align:center; color: var(--text-faint); }
.output-empty svg { width: 40px; height:40px; margin-bottom: 12px; color: var(--border); }
.output-toolbar { display:flex; gap:6px; flex-wrap:wrap; padding: 12px 18px; border-bottom: 1px solid var(--border-soft); background: var(--panel-2); }
.output-toolbar .btn { padding: 7px 10px; font-size: 12px; }
.prompt-output {
  font-family: var(--font-mono); font-size: 12.8px; line-height: 1.65; white-space: pre-wrap; word-wrap: break-word;
  padding: 18px; max-height: 640px; overflow-y: auto; color: var(--text);
}
.prompt-output[contenteditable="true"] { outline: none; background: var(--bg-elevated); }
.prompt-output strong, .prompt-output b { color: var(--ember-2); }

.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  padding: 11px 18px; border-radius: var(--radius-md); font-size: 13px; font-weight: 500;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3); opacity: 0; pointer-events: none; z-index: 100;
  transition: opacity 200ms ease, transform 200ms ease; display:flex; align-items:center; gap:8px;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast .dot-ok { width:7px; height:7px; border-radius:50%; background: var(--success); }

/* Drawer (History / Favorites / Templates) */
.drawer-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 90;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; height: 100%; width: min(420px, 92vw);
  background: var(--bg-elevated); border-left: 1px solid var(--border);
  transform: translateX(100%); transition: transform 220ms ease; z-index: 91;
  display: flex; flex-direction: column;
}
.drawer.open { transform: translateX(0); }
.drawer-header { display:flex; align-items:center; justify-content:space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.drawer-tabs { display:flex; gap: 4px; padding: 10px 14px 0; }
.drawer-tab { padding: 8px 12px; font-size: 12.5px; font-weight:600; color: var(--text-dim); border-radius: var(--radius-sm) var(--radius-sm) 0 0; border: 1px solid transparent; }
.drawer-tab.active { color: var(--text); background: var(--panel); border-color: var(--border); border-bottom-color: var(--panel); }
.drawer-body { padding: 14px; overflow-y: auto; flex: 1; }
.entry-card { border: 1px solid var(--border); border-radius: var(--radius-md); padding: 12px; margin-bottom: 10px; background: var(--panel); }
.entry-card h4 { font-size: 13px; margin-bottom: 4px; }
.entry-card .meta { font-size: 11px; color: var(--text-faint); margin-bottom: 8px; }
.entry-card .snippet { font-size: 11.5px; color: var(--text-dim); font-family: var(--font-mono); max-height: 60px; overflow:hidden; margin-bottom:10px; }
.entry-card .entry-actions { display:flex; gap:6px; }
.entry-card .entry-actions .btn { padding: 6px 9px; font-size: 11px; }
.empty-state { text-align:center; color: var(--text-faint); padding: 40px 10px; font-size: 13px; }

/* Modal (Upgrade / Templates) */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 95;
  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(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg); width: min(560px, 92vw); max-height: 86vh; overflow-y:auto; box-shadow: 0 20px 60px rgba(0,0,0,0.4); }
.modal-header { padding: 20px 22px; border-bottom: 1px solid var(--border); display:flex; justify-content:space-between; align-items:center; }
.modal-body { padding: 22px; }
.plan-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px;}
@media (max-width: 560px){ .plan-grid{ grid-template-columns: 1fr; } }
.plan-card { border: 1px solid var(--border); border-radius: var(--radius-md); padding: 16px; }
.plan-card.highlight { border-color: var(--ember); background: linear-gradient(180deg, var(--ember-glow), transparent 60%); }
.plan-card h4 { font-size: 15px; margin-bottom: 4px; }
.plan-price { font-family: var(--font-display); font-size: 22px; font-weight:700; margin: 8px 0; }
.plan-price span { font-size: 12px; color: var(--text-faint); font-weight:500; }
.plan-card ul { list-style:none; padding:0; margin: 12px 0; font-size: 12.5px; color: var(--text-dim); }
.plan-card ul li { padding: 4px 0; display:flex; gap:8px; align-items:flex-start; }
.plan-card ul li::before { content: "✓"; color: var(--success); font-weight:700; }

/* Category grid (home / all categories view) */
.cat-card-grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(230px,1fr)); gap: 14px; }
.cat-card {
  border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius-lg); padding: 16px;
  text-align:left; transition: transform var(--transition), border-color var(--transition);
}
.cat-card:hover { transform: translateY(-2px); border-color: var(--ember); }
.cat-card .cat-icon-wrap { width: 38px; height:38px; border-radius: 10px; background: var(--panel-2); display:flex; align-items:center; justify-content:center; margin-bottom: 12px; color: var(--ember); }
.cat-card .cat-icon-wrap svg { width:19px; height:19px; }
.cat-card h4 { font-size: 14px; margin-bottom: 5px; }
.cat-card p { font-size: 12px; color: var(--text-faint); margin:0; line-height:1.5; }
.cat-card .lock-badge { font-size: 10px; color: var(--ember); text-transform:uppercase; font-weight:700; letter-spacing:0.04em; margin-top:8px; display:inline-block;}

/* Usage meter */
.usage-meter { font-size: 11.5px; color: var(--text-faint); margin-top: 10px; }
.usage-bar { height: 5px; border-radius: 3px; background: var(--border); margin-top:6px; overflow:hidden; }
.usage-bar-fill { height:100%; background: linear-gradient(90deg, var(--ember), var(--ember-2)); }

/* Mobile */
.menu-toggle { display:none; }
@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; grid-template-areas: "topbar" "main"; }
  .sidebar {
    position: fixed; top: 64px; left: 0; bottom: 0; width: min(280px, 84vw); z-index: 60;
    transform: translateX(-100%); transition: transform 220ms ease;
  }
  .sidebar.open { transform: translateX(0); box-shadow: 20px 0 40px rgba(0,0,0,0.3); }
  .menu-toggle { display:flex; }
  .main { padding: 18px 14px 50px; }
  .brand-sub { display:none; }
}

.helper-text { font-size: 11.5px; color: var(--text-faint); margin-top: -8px; margin-bottom: 14px; }
.section-divider { border:none; border-top: 1px solid var(--border-soft); margin: 22px 0; }
.link-btn { background:none; border:none; color: var(--steel); font-size: 12.5px; font-weight:600; padding:0; }
.link-btn:hover { text-decoration: underline; }

footer.app-footer { text-align:center; color: var(--text-faint); font-size: 11.5px; padding: 30px 0 10px; }