/* =============================================================
   CONVSTA — Design System v3
   Redesigned from scratch. Light + dark themes.
   Modern minimalism, indigo accent, generous type & spacing.
   Preserves all legacy class names so tool pages keep working.
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* =============================================================
   DESIGN TOKENS
   ============================================================= */
:root {
  /* Type */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  /* Shape */
  --r-xs: 4px;
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Motion */
  --t: .18s cubic-bezier(.4,0,.2,1);
  --t-slow: .32s cubic-bezier(.4,0,.2,1);

  /* Layout */
  --sidebar-w: 260px;
  --topbar-h: 56px;
  --canvas-max: 1180px;

  /* Legacy gradient alias (used by older inline styles) */
  --gradient: linear-gradient(120deg, #6366f1 0%, #14b8a6 100%);

  /* Category colors — shared across themes */
  --blue:   #3b82f6;
  --indigo: #6366f1;
  --purple: #a855f7;
  --pink:   #ec4899;
  --green:  #10b981;
  --orange: #f59e0b;
  --red:    #ef4444;
  --yellow: #eab308;
  --cyan:   #06b6d4;
  --teal:   #14b8a6;
}

/* -------- Dark (default) -------- */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  --bg-0: #0a0a0c;
  --bg-1: #101014;
  --bg-2: #16161d;
  --bg-3: #1e1e27;
  --bg-4: #262631;
  --bg-hover: #23232e;

  --border:        #21212b;
  --border-strong: #303040;
  --border-focus:  var(--indigo);

  --text-1: #f5f5f7;
  --text-2: #b4b4c0;
  --text-3: #7d7d8c;
  --text-4: #4c4c5a;

  --accent:        #818cf8;
  --accent-strong: #6366f1;
  --accent-soft:   rgba(99, 102, 241, 0.14);
  --accent-glow:   rgba(99, 102, 241, 0.28);

  --shadow-sm:   0 1px 2px rgba(0,0,0,.4);
  --shadow:      0 2px 6px rgba(0,0,0,.35), 0 8px 20px rgba(0,0,0,.30);
  --shadow-lg:   0 10px 40px rgba(0,0,0,.55), 0 2px 8px rgba(0,0,0,.4);
  --shadow-glow: 0 0 0 1px var(--accent-soft), 0 10px 30px var(--accent-glow);

  --hero-glow-1: rgba(99, 102, 241, 0.10);
  --hero-glow-2: rgba(20, 184, 166, 0.06);
}

/* -------- Light -------- */
[data-theme="light"] {
  color-scheme: light;

  --bg-0: #ffffff;
  --bg-1: #fafafb;
  --bg-2: #f4f4f7;
  --bg-3: #ececf1;
  --bg-4: #e2e2ea;
  --bg-hover: #f0f0f5;

  --border:        #ececf0;
  --border-strong: #d9d9e0;
  --border-focus:  var(--indigo);

  --text-1: #111114;
  --text-2: #4a4a55;
  --text-3: #767683;
  --text-4: #a0a0ac;

  --accent:        #6366f1;
  --accent-strong: #4f46e5;
  --accent-soft:   rgba(99, 102, 241, 0.10);
  --accent-glow:   rgba(99, 102, 241, 0.16);

  --shadow-sm:   0 1px 2px rgba(15, 15, 30, .04);
  --shadow:      0 1px 3px rgba(15, 15, 30, .06), 0 4px 16px rgba(15, 15, 30, .06);
  --shadow-lg:   0 12px 40px rgba(15, 15, 30, .12), 0 2px 8px rgba(15, 15, 30, .06);
  --shadow-glow: 0 0 0 1px var(--accent-soft), 0 8px 24px var(--accent-glow);

  --hero-glow-1: rgba(99, 102, 241, 0.08);
  --hero-glow-2: rgba(20, 184, 166, 0.05);
}

/* =============================================================
   RESET
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg-main);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--t), color var(--t);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 60% 40% at 15% -10%, var(--hero-glow-1), transparent 60%),
    radial-gradient(ellipse 50% 40% at 85% 110%, var(--hero-glow-2), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

body > * { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }

img, svg { display: block; max-width: 100%; }

::selection { background: var(--accent-glow); color: var(--text-1); }

/* =============================================================
   APP SHELL
   ============================================================= */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* -------- Sidebar -------- */
.app-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  overflow: hidden;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 18px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-brand .logo-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--indigo) 0%, var(--teal) 100%);
  box-shadow: 0 4px 14px var(--accent-glow);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}
.sidebar-brand .logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../img/convsta-logo.svg');
  background-size: cover;
  background-position: center;
}

.sidebar-brand .brand-name {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -.3px;
  color: var(--text-1);
}

.sidebar-brand .brand-badge {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 7px;
  border-radius: 999px;
  margin-left: auto;
  letter-spacing: .8px;
  text-transform: uppercase;
}

.sidebar-search {
  padding: 14px 14px 10px;
  flex-shrink: 0;
}

.sidebar-search-input {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: var(--t);
}

.sidebar-search-input:focus-within {
  border-color: var(--accent);
  background: var(--bg-0);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.sidebar-search-input svg { color: var(--text-3); flex-shrink: 0; }

.sidebar-search-input input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-1);
  font-family: var(--font);
  font-size: 13px;
  min-width: 0;
}

.sidebar-search-input input::placeholder { color: var(--text-3); }

.sidebar-search-input kbd {
  font-family: var(--mono);
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-3);
  color: var(--text-3);
  border: 1px solid var(--border-strong);
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px 14px;
}

.sidebar-section { margin-top: 14px; }
.sidebar-section:first-child { margin-top: 4px; }

.sidebar-section-title {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px 6px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.1px;
  color: var(--text-3);
}

.sidebar-section-title .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  box-shadow: 0 0 8px currentColor;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  transition: var(--t);
  cursor: pointer;
  position: relative;
}

.sidebar-item .item-emoji {
  font-size: 14px;
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  filter: saturate(.9);
}

.sidebar-item:hover {
  background: var(--bg-2);
  color: var(--text-1);
}

.sidebar-item.active {
  background: var(--accent-soft);
  color: var(--text-1);
  font-weight: 600;
}

.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: -10px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sidebar-footer a,
.sidebar-footer button {
  flex: 1;
  padding: 6px 8px;
  border-radius: var(--r-sm);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  background: transparent;
  text-align: center;
  transition: var(--t);
}

.sidebar-footer a:hover,
.sidebar-footer button:hover {
  color: var(--text-1);
  background: var(--bg-2);
}

/* -------- Main canvas -------- */
.app-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px;
  background: color-mix(in oklab, var(--bg-0) 78%, transparent);
  backdrop-filter: saturate(140%) blur(16px);
  -webkit-backdrop-filter: saturate(140%) blur(16px);
  border-bottom: 1px solid var(--border);
}

.topbar-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 13px;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.topbar-crumb .sep { color: var(--text-4); }
.topbar-crumb .current { color: var(--text-1); font-weight: 600; }
.topbar-crumb a:hover { color: var(--text-1); }

.topbar-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: var(--t);
}
.topbar-menu-btn:hover { background: var(--bg-2); color: var(--text-1); }

.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-toggle {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  color: var(--text-2);
  border: 1px solid var(--border);
  background: var(--bg-1);
  transition: var(--t);
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-strong);
  background: var(--bg-2);
}
[data-theme="light"] .theme-toggle .icon-sun,
[data-theme="dark"]  .theme-toggle .icon-moon { display: none; }

.app-canvas {
  flex: 1;
  padding: 32px 40px 60px;
  max-width: 100%;
  min-width: 0;
}
.app-canvas > * { max-width: var(--canvas-max); }
.app-canvas > .home-hero,
.app-canvas > .tool-page { margin-left: auto; margin-right: auto; }

/* Legacy nav — hidden when shell is present */
body.has-shell .tool-nav,
body.has-shell .navbar { display: none !important; }

/* Legacy tool-nav (fallback before shell.js loads) */
.tool-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  height: 52px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.tool-nav .back-btn { display: flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: var(--r-sm); color: var(--text-2); font-size: 13px; border: 1px solid var(--border); }
.tool-nav .back-btn:hover { color: var(--text-1); background: var(--bg-2); }
.tool-nav .brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; color: var(--text-1); margin-right: auto; }
.tool-nav .logo-icon { width: 26px; height: 26px; border-radius: 6px; background: linear-gradient(135deg, var(--indigo), var(--teal)); }
.breadcrumb { font-size: 13px; color: var(--text-3); }
.breadcrumb span { color: var(--text-1); font-weight: 600; }

/* =============================================================
   HOMEPAGE
   ============================================================= */
.home-hero {
  padding: 48px 4px 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
  position: relative;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px 5px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in oklab, var(--accent) 25%, transparent);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .4px;
  margin-bottom: 18px;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--green) 25%, transparent);
}

.home-hero h1 {
  font-size: clamp(32px, 4.4vw, 52px);
  font-weight: 800;
  letter-spacing: -1.6px;
  line-height: 1.02;
  margin-bottom: 16px;
  color: var(--text-1);
}

.home-hero h1 .accent {
  background: linear-gradient(120deg, var(--indigo) 0%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.home-hero p.lead {
  font-size: 16px;
  color: var(--text-2);
  max-width: 620px;
  margin-bottom: 24px;
  line-height: 1.6;
}

.hero-meta {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  margin-top: 18px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta strong { color: var(--text-1); font-weight: 700; }
.hero-meta .pill-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.hero-meta kbd {
  font-family: var(--mono); font-size: 10px;
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px; color: var(--text-2);
}

/* Legacy hero */
.hero { padding: 40px 24px 24px; text-align: left; }
.hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -1px; margin-bottom: 12px; }
.hero h1 .grad,
.hero h1 .accent {
  background: linear-gradient(120deg, var(--indigo) 0%, var(--teal) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { font-size: 15px; color: var(--text-2); max-width: 560px; margin-bottom: 24px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 100px;
  background: var(--accent-soft); border: 1px solid color-mix(in oklab, var(--accent) 20%, transparent);
  color: var(--accent); font-size: 11px; font-weight: 600;
  letter-spacing: .5px; text-transform: uppercase; margin-bottom: 20px;
}

.search-bar {
  display: flex; align-items: center; gap: 10px;
  max-width: 620px;
  background: var(--bg-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  padding: 0 18px 0 16px;
  transition: var(--t);
  box-shadow: var(--shadow-sm);
}
.search-bar:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  background: var(--bg-0);
}
.search-bar svg { color: var(--text-3); flex-shrink: 0; }
.search-bar input { flex: 1; height: 50px; background: none; border: none; color: var(--text-1); font-family: var(--font); font-size: 15px; outline: none; }
.search-bar input::placeholder { color: var(--text-3); }

/* =============================================================
   CATEGORIES / FILTERS
   ============================================================= */
.categories {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--t);
  border: 1px solid var(--border);
  background: var(--bg-1);
  color: var(--text-2);
  font-family: var(--font);
  letter-spacing: 0;
}

.cat-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-1);
  background: var(--bg-2);
}

.cat-btn.active {
  background: var(--accent-soft);
  border-color: color-mix(in oklab, var(--accent) 35%, transparent);
  color: var(--text-1);
}

.cat-btn .dot { width: 7px; height: 7px; border-radius: 50%; }

/* =============================================================
   SECTION HEADERS
   ============================================================= */
.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.section-title {
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 1.4px;
  white-space: nowrap;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-count {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.section-group { margin-bottom: 40px; }

/* =============================================================
   TOOL CARDS
   ============================================================= */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: transform var(--t), border-color var(--t), background var(--t), box-shadow var(--t);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at 100% 0%, var(--accent-soft) 0%, transparent 55%);
  opacity: 0;
  transition: opacity var(--t);
  pointer-events: none;
  z-index: -1;
}

.tool-card:hover {
  background: var(--bg-2);
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.tool-card:hover::before { opacity: 1; }

.tool-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.tool-card-body { flex: 1; }

.tool-card-name {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--text-1);
  letter-spacing: -.1px;
}

.tool-card-desc {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.55;
}

.tool-card-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .3px;
  text-transform: uppercase;
  width: fit-content;
}

.tool-card-arrow {
  position: absolute;
  top: 16px;
  right: 16px;
  color: var(--text-3);
  opacity: 0;
  transition: var(--t);
  transform: translateX(-4px);
}

.tool-card:hover .tool-card-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent);
}

/* -------- Featured strip -------- */
.featured-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 36px;
}

.featured-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  transition: var(--t);
  text-decoration: none;
  color: inherit;
}

.featured-item:hover {
  background: var(--bg-2);
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.featured-item .icon {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.featured-item .name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-1);
}
.featured-item .meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-top: 2px;
}

.no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-3);
  border: 1px dashed var(--border);
  border-radius: var(--r-lg);
  background: var(--bg-1);
}
.no-results h3 { font-size: 16px; margin-bottom: 6px; color: var(--text-2); font-weight: 700; }

/* =============================================================
   TOOL PAGE
   ============================================================= */
.tool-page {
  max-width: var(--canvas-max);
  margin: 0 auto;
  padding: 4px 0 60px;
}

body:not(.has-shell) .tool-page {
  padding: 32px 24px 60px;
}

.tool-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.tool-header-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  flex-shrink: 0;
  border: 1px solid var(--border);
}

.tool-header-info { flex: 1; min-width: 0; }

.tool-header-info h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: 6px;
  color: var(--text-1);
}

.tool-header-info p {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 680px;
}

/* =============================================================
   PANELS
   ============================================================= */
.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.panel-grid.single { grid-template-columns: 1fr; }

@media (max-width: 900px) { .panel-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: var(--t);
}

.panel:focus-within { border-color: var(--border-strong); }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  gap: 8px;
}

.panel-title {
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.panel-actions {
  display: flex;
  gap: 4px;
  align-items: center;
}

.panel-body { padding: 16px; }

/* =============================================================
   INPUTS
   ============================================================= */
textarea, input[type="text"], input[type="number"], input[type="url"],
input[type="email"], input[type="password"], select {
  width: 100%;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-1);
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 12px;
  outline: none;
  transition: var(--t);
  resize: vertical;
}

input[type="text"], input[type="number"], input[type="url"],
input[type="email"], input[type="password"] { resize: none; }

textarea:focus, input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea::placeholder, input::placeholder { color: var(--text-3); }

select {
  font-family: var(--font);
  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 24 24' fill='none' stroke='%237d7d8c' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.code-area {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  min-height: 200px;
  background: var(--bg-0);
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px;
  resize: vertical;
  width: 100%;
  outline: none;
  transition: var(--t);
}

.code-area:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* =============================================================
   BUTTONS
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  transition: var(--t);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  line-height: 1.2;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(180deg, var(--indigo), var(--accent-strong));
  color: white;
  border-color: color-mix(in oklab, var(--indigo) 60%, black);
  box-shadow: 0 1px 0 rgba(255,255,255,.15) inset, 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255,255,255,.2) inset, 0 6px 18px var(--accent-glow);
  filter: brightness(1.05);
}
.btn-primary:active { transform: translateY(0); filter: brightness(.98); }

.btn-secondary {
  background: var(--bg-2);
  border-color: var(--border);
  color: var(--text-1);
}
.btn-secondary:hover { background: var(--bg-3); border-color: var(--border-strong); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
}
.btn-ghost:hover { background: var(--bg-2); color: var(--text-1); }

.btn-danger {
  background: color-mix(in oklab, var(--red) 12%, transparent);
  border-color: color-mix(in oklab, var(--red) 30%, transparent);
  color: var(--red);
}
.btn-danger:hover { background: color-mix(in oklab, var(--red) 18%, transparent); }

.btn-sm { padding: 6px 11px; font-size: 12px; }
.btn-lg { padding: 11px 22px; font-size: 14px; }
.btn-icon { width: 32px; height: 32px; padding: 0; justify-content: center; }

/* =============================================================
   CONTROLS
   ============================================================= */
.controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
}

.toggle-group {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--bg-1);
}

.toggle-btn {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--t);
  background: transparent;
  color: var(--text-2);
  border: none;
  font-family: var(--font);
}
.toggle-btn:hover { background: var(--bg-2); color: var(--text-1); }
.toggle-btn.active { background: var(--accent-strong); color: white; }

.check-group {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
}
.check-group input { width: 14px; height: 14px; accent-color: var(--accent); cursor: pointer; }
.check-group:hover { color: var(--text-1); }

input[type="range"] {
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
  background: transparent;
}

/* =============================================================
   BADGES
   ============================================================= */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .4px;
  text-transform: uppercase;
}
.badge-blue   { background: color-mix(in oklab, var(--blue) 14%, transparent);   color: var(--blue);   border: 1px solid color-mix(in oklab, var(--blue) 25%, transparent); }
.badge-purple { background: color-mix(in oklab, var(--purple) 14%, transparent); color: var(--purple); border: 1px solid color-mix(in oklab, var(--purple) 25%, transparent); }
.badge-green  { background: color-mix(in oklab, var(--green) 14%, transparent);  color: var(--green);  border: 1px solid color-mix(in oklab, var(--green) 25%, transparent); }
.badge-orange { background: color-mix(in oklab, var(--orange) 14%, transparent); color: var(--orange); border: 1px solid color-mix(in oklab, var(--orange) 25%, transparent); }
.badge-red    { background: color-mix(in oklab, var(--red) 14%, transparent);    color: var(--red);    border: 1px solid color-mix(in oklab, var(--red) 25%, transparent); }
.badge-cyan   { background: color-mix(in oklab, var(--cyan) 14%, transparent);   color: var(--cyan);   border: 1px solid color-mix(in oklab, var(--cyan) 25%, transparent); }
.badge-yellow { background: color-mix(in oklab, var(--yellow) 14%, transparent); color: var(--yellow); border: 1px solid color-mix(in oklab, var(--yellow) 25%, transparent); }
.badge-indigo { background: color-mix(in oklab, var(--indigo) 14%, transparent); color: var(--indigo); border: 1px solid color-mix(in oklab, var(--indigo) 25%, transparent); }
.badge-teal   { background: color-mix(in oklab, var(--teal) 14%, transparent);   color: var(--teal);   border: 1px solid color-mix(in oklab, var(--teal) 25%, transparent); }

/* =============================================================
   ALERTS
   ============================================================= */
.alert {
  padding: 11px 14px;
  border-radius: var(--r-sm);
  font-size: 13px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}
.alert-success { background: color-mix(in oklab, var(--green) 10%, transparent); border: 1px solid color-mix(in oklab, var(--green) 25%, transparent); color: var(--green); }
.alert-error   { background: color-mix(in oklab, var(--red) 10%, transparent);   border: 1px solid color-mix(in oklab, var(--red) 25%, transparent);   color: var(--red); }
.alert-info    { background: color-mix(in oklab, var(--blue) 10%, transparent);  border: 1px solid color-mix(in oklab, var(--blue) 25%, transparent);  color: var(--blue); }
.alert-warn    { background: color-mix(in oklab, var(--yellow) 10%, transparent);border: 1px solid color-mix(in oklab, var(--yellow) 25%, transparent);color: var(--yellow); }

/* =============================================================
   STATS / RESULTS
   ============================================================= */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}
.stat-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  text-align: center;
  transition: var(--t);
}
.stat-card:hover { border-color: var(--border-strong); background: var(--bg-2); }
.stat-value {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.5px;
  color: var(--text-1);
}
.stat-label {
  font-size: 10px;
  color: var(--text-3);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: .8px;
  font-weight: 700;
}

.result-box {
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  word-break: break-all;
  min-height: 40px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.result-row:last-child { border-bottom: none; }
.result-label { font-size: 12px; color: var(--text-3); font-weight: 600; flex-shrink: 0; }
.result-value { font-family: var(--mono); font-size: 12.5px; color: var(--text-1); word-break: break-all; }

/* =============================================================
   TOOL-SPECIFIC SHARED
   ============================================================= */
.color-swatch { width: 100%; height: 80px; border-radius: var(--r); border: 1px solid var(--border); transition: var(--t); }

#qr-output {
  display: flex; align-items: center; justify-content: center;
  padding: 24px; background: white; border-radius: var(--r-lg); min-height: 200px;
}

.diff-line { display: flex; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; }
.diff-line.added   { background: color-mix(in oklab, var(--green) 10%, transparent); }
.diff-line.removed { background: color-mix(in oklab, var(--red) 10%, transparent); }
.diff-line.unchanged { color: var(--text-2); }
.diff-gutter { width: 36px; flex-shrink: 0; text-align: right; padding-right: 10px; color: var(--text-3); font-size: 11px; border-right: 1px solid var(--border); margin-right: 12px; user-select: none; }
.diff-sign { width: 14px; flex-shrink: 0; font-weight: 700; }
.diff-line.added .diff-sign   { color: var(--green); }
.diff-line.removed .diff-sign { color: var(--red); }

.jwt-section {
  border-radius: var(--r-sm); padding: 12px 14px; margin-bottom: 10px;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.7; word-break: break-all;
}
.jwt-header    { background: color-mix(in oklab, var(--orange) 10%, transparent); border: 1px solid color-mix(in oklab, var(--orange) 25%, transparent); }
.jwt-payload   { background: color-mix(in oklab, var(--purple) 10%, transparent); border: 1px solid color-mix(in oklab, var(--purple) 25%, transparent); }
.jwt-signature { background: color-mix(in oklab, var(--green) 10%, transparent);  border: 1px solid color-mix(in oklab, var(--green) 25%, transparent); }
.jwt-section-title {
  font-family: var(--font); font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .8px; margin-bottom: 8px;
}
.jwt-header    .jwt-section-title { color: var(--orange); }
.jwt-payload   .jwt-section-title { color: var(--purple); }
.jwt-signature .jwt-section-title { color: var(--green); }

mark.match { background: color-mix(in oklab, var(--yellow) 40%, transparent); color: var(--text-1); border-radius: 2px; padding: 0 1px; }

.strength-bar { height: 4px; border-radius: 2px; background: var(--border); overflow: hidden; margin-top: 6px; }
.strength-fill { height: 100%; border-radius: 2px; transition: width .3s ease, background .3s ease; }

/* =============================================================
   ICON CHIPS
   ============================================================= */
.icon-blue   { background: color-mix(in oklab, var(--blue) 14%, transparent);   color: var(--blue); }
.icon-purple { background: color-mix(in oklab, var(--purple) 14%, transparent); color: var(--purple); }
.icon-green  { background: color-mix(in oklab, var(--green) 14%, transparent);  color: var(--green); }
.icon-orange { background: color-mix(in oklab, var(--orange) 14%, transparent); color: var(--orange); }
.icon-red    { background: color-mix(in oklab, var(--red) 14%, transparent);    color: var(--red); }
.icon-cyan   { background: color-mix(in oklab, var(--cyan) 14%, transparent);   color: var(--cyan); }
.icon-yellow { background: color-mix(in oklab, var(--yellow) 14%, transparent); color: var(--yellow); }
.icon-indigo { background: color-mix(in oklab, var(--indigo) 14%, transparent); color: var(--indigo); }
.icon-teal   { background: color-mix(in oklab, var(--teal) 14%, transparent);   color: var(--teal); }

/* =============================================================
   AD SLOTS
   ============================================================= */
.ad-banner {
  display: flex; justify-content: center; align-items: center;
  padding: 10px 16px; background: var(--bg-1);
}
.ad-banner-top    { border-bottom: 1px solid var(--border); }
.ad-banner-bottom { border-top: 1px solid var(--border); margin-top: 8px; }

.ad-leaderboard {
  width: 100%; max-width: 728px; min-height: 60px;
  background: var(--bg-2); border: 1px dashed var(--border);
  border-radius: var(--r-sm); overflow: hidden;
}

.inline-ad {
  margin: 28px 0;
  padding: 18px;
  background: var(--bg-1);
  border: 1px dashed var(--border);
  border-radius: var(--r-lg);
  text-align: center;
}
.inline-ad-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.mobile-ad-row {
  display: none;
  width: 100%;
  background: var(--bg-1);
  border-top: 1px solid var(--border);
}
.ad-mobile-slot {
  max-width: 380px;
  margin: 0 auto;
  padding: 14px 0 20px;
  text-align: center;
}
.ad-mobile-slot span {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-4);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
@media (max-width: 1040px) { .mobile-ad-row { display: block; } }

/* =============================================================
   FAQ / FOOTER
   ============================================================= */
.faq-section {
  margin: 72px auto 48px;
  max-width: 780px;
}
.faq-section .faq-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -.6px;
  text-align: center;
  margin-bottom: 6px;
}
.faq-section .faq-subtitle {
  font-size: 14px;
  color: var(--text-3);
  text-align: center;
  margin-bottom: 26px;
}

.faq-list { display: flex; flex-direction: column; gap: 10px; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--bg-1);
  transition: var(--t);
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-item.open { border-color: color-mix(in oklab, var(--accent) 40%, transparent); background: var(--bg-2); }

.faq-q {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: none;
  border: none;
  color: var(--text-1);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-q svg { color: var(--text-3); transition: var(--t); flex-shrink: 0; }
.faq-item.open .faq-q svg { transform: rotate(180deg); color: var(--accent); }

.faq-a {
  padding: 0 20px 16px;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.7;
  display: none;
}
.faq-item.open .faq-a { display: block; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
  font-family: var(--mono);
}
.site-footer a { color: var(--accent); font-weight: 600; }
.site-footer a:hover { color: var(--text-1); }
.site-footer p { margin: 4px 0; }

.footer-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 16px; margin-bottom: 16px;
}

.footer-share {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px; margin-bottom: 16px;
}

.footer-share a {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  color: var(--text-3);
  transition: var(--t);
}
.footer-share a:hover { color: var(--accent); border-color: var(--border-strong); background: var(--bg-2); }

/* =============================================================
   PRODUCT PROMO
   ============================================================= */
.main-product-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 600;
  transition: var(--t);
  background: var(--bg-2);
}
.main-product-nav-link:hover {
  color: var(--accent);
  border-color: color-mix(in oklab, var(--accent) 40%, transparent);
  background: var(--accent-soft);
}

.main-product-site-note {
  max-width: var(--canvas-max);
  margin: 20px auto 24px;
  padding: 14px 20px;
  background: linear-gradient(135deg, var(--accent-soft) 0%, color-mix(in oklab, var(--teal) 10%, transparent) 100%);
  border: 1px solid color-mix(in oklab, var(--accent) 25%, transparent);
  border-radius: var(--r);
  color: var(--text-1);
  font-size: 13px;
  text-align: center;
}
.main-product-site-note a {
  color: var(--accent);
  font-weight: 700;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}
.main-product-site-note a:hover {
  color: var(--text-1);
  border-color: var(--text-1);
}

#main-product-popup {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 999;
  width: 340px;
  max-width: calc(100% - 24px);
  background: var(--bg-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  color: var(--text-1);
  overflow: hidden;
  font-size: 13px;
}
#main-product-popup .popup-header {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 12px; padding: 14px 16px 10px; border-bottom: 1px solid var(--border);
}
#main-product-popup .popup-close {
  border: none; background: transparent; color: var(--text-3);
  font-size: 18px; line-height: 1; padding: 4px 8px;
}
#main-product-popup .popup-close:hover { color: var(--text-1); }
#main-product-popup .popup-subtitle { margin-top: 4px; font-size: 12px; color: var(--text-3); }
#main-product-popup .popup-body { padding: 12px 16px; color: var(--text-2); line-height: 1.5; }
#main-product-popup .popup-actions { display: flex; padding: 0 16px 16px; }
#main-product-popup .popup-action {
  display: inline-flex; width: 100%; justify-content: center;
  padding: 10px 14px; border-radius: var(--r-sm);
  background: var(--accent-strong); color: #fff; font-weight: 700;
  transition: var(--t);
}
#main-product-popup .popup-action:hover { filter: brightness(1.08); }

#main-product-icon-minimized {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 998;
  background: linear-gradient(135deg, var(--indigo), var(--teal));
  border: 1px solid rgba(255,255,255,.1);
  color: white;
  padding: 10px 14px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--t);
}
#main-product-icon-minimized:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
  filter: brightness(1.08);
}

/* =============================================================
   SHARE MENU
   ============================================================= */
#share-menu {
  background: var(--bg-1);
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  box-shadow: var(--shadow-lg);
  padding: 8px;
}

.share-menu-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--r-sm);
  color: var(--text-2); font-size: 13px;
  transition: var(--t);
}
.share-menu-item:hover { background: var(--bg-2); color: var(--text-1); }

/* =============================================================
   TOAST
   ============================================================= */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-3);
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  padding: 9px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  z-index: 9999;
  white-space: nowrap;
  box-shadow: var(--shadow-lg);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* =============================================================
   SCROLLBARS
   ============================================================= */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; border: 2px solid var(--bg-0); }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* =============================================================
   UTILITIES
   ============================================================= */
.mt-4 { margin-top: 4px; } .mt-8 { margin-top: 8px; } .mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-12 { margin-bottom: 12px; } .mb-16 { margin-bottom: 16px; }
.flex { display: flex; } .flex-col { flex-direction: column; }
.items-center { align-items: center; } .justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.w-full { width: 100%; }
.font-mono { font-family: var(--mono); }
.text-sm { font-size: 12px; } .text-lg { font-size: 16px; }
.text-muted { color: var(--text-3); } .text-secondary { color: var(--text-2); }
.hidden { display: none !important; }
.overflow-auto { overflow: auto; }

/* =============================================================
   PROSE (about / privacy / terms)
   ============================================================= */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 0 40px;
  color: var(--text-2);
  font-size: 14.5px;
  line-height: 1.75;
}
.prose h1 {
  font-size: 32px; font-weight: 800; letter-spacing: -.8px;
  color: var(--text-1); margin-bottom: 8px;
}
.prose h2 {
  font-size: 18px; font-weight: 700; letter-spacing: -.3px;
  color: var(--text-1); margin-top: 32px; margin-bottom: 10px;
}
.prose h3 {
  font-size: 15px; font-weight: 700;
  color: var(--text-1); margin-top: 24px; margin-bottom: 8px;
}
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--accent); font-weight: 600; }
.prose a:hover { text-decoration: underline; }
.prose .lead { font-size: 16px; color: var(--text-2); margin-bottom: 24px; }
.prose code {
  font-family: var(--mono); font-size: 12.5px;
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 1px 6px; border-radius: 4px; color: var(--text-1);
}

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 1024px) {
  :root { --sidebar-w: 232px; }
  .app-canvas { padding: 28px 28px 60px; }
}

@media (max-width: 820px) {
  .app-shell { grid-template-columns: 1fr; }
  .app-sidebar {
    position: fixed;
    left: 0; top: 0;
    height: 100vh;
    width: 288px;
    max-width: 86vw;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform .28s cubic-bezier(.4,0,.2,1);
    box-shadow: var(--shadow-lg);
  }
  .app-sidebar.open { transform: translateX(0); }
  .sidebar-scrim {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 150;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
  }
  .sidebar-scrim.show { opacity: 1; pointer-events: auto; }
  .topbar-menu-btn { display: inline-flex; }
  .app-canvas { padding: 22px 18px 40px; }
  .home-hero { padding: 28px 0 22px; margin-bottom: 22px; }
  .tools-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .tool-card { padding: 16px; }
  .tool-header { gap: 12px; padding-bottom: 20px; margin-bottom: 22px; }
  .tool-header-icon { width: 48px; height: 48px; font-size: 22px; }
  .tool-header-info h1 { font-size: 20px; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
  .home-hero h1 { font-size: 28px; letter-spacing: -1px; }
  .app-canvas { padding: 18px 14px 32px; }
  .hero-meta { gap: 12px; font-size: 11px; }
}