/* ============================================================
   SheetsDB — Unified Design System
   Shared by: index.html (landing) + app/index.html (demo)
   Dark OLED · Green accent · Space Grotesk + DM Sans
   ============================================================= */

/* ============================================================
   1. Design Tokens
   ============================================================= */

:root {
  /* Surfaces */
  --bg:        #020617;
  --surface:   #0F172A;
  --surface2:  #1E293B;
  --code-bg:   #0A0F1D;

  /* Borders */
  --border:    #1E3A2F;
  --border2:   #334155;

  /* Brand accents */
  --accent:    #22C55E;
  --accent-h:  #4ADE80;
  --accent-d:  #16A34A;
  --purple:    #7C5CFC;
  --purple-h:  #9678FD;
  --purple-d:  #6540E0;
  --cyan:      #00D4C8;
  --cyan-h:    #2EE4D8;

  /* Semantic */
  --success:   #2DD4BF;
  --error:     #F87171;
  --error-d:   #DC2626;
  --warning:   #FBBF24;

  /* Text */
  --text:      #F8FAFC;
  --text-dim:  #94A3B8;
  --text-muted:#64748B;

  /* Typography */
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Radii */
  --radius:    12px;
  --radius-sm: 8px;
  --radius-xs: 4px;

  /* Effects */
  --shadow:    0 1px 3px rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.25);
  --transition: 180ms ease;
}

/* ============================================================
   2. Reset & Base
   ============================================================= */

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

html {
  font-size: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(34,197,94,.05) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(0,212,200,.04) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 60%, rgba(34,197,94,.04) 0%, transparent 60%),
    var(--bg);
}

/* ============================================================
   3. Typography
   ============================================================= */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  letter-spacing: -0.3px;
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--font-mono);
}

::selection {
  background: rgba(34,197,94,.25);
  color: var(--text);
}

/* ============================================================
   4. Buttons (shared)
   ============================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  letter-spacing: 0.1px;
  white-space: nowrap;
  line-height: 1.3;
}

.btn:active { transform: scale(0.97); }

/* Primary — green accent (main CTAs) */
.btn-primary {
  background: var(--accent);
  color: #020617;
}
.btn-primary:hover {
  background: var(--accent-h);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(34,197,94,.25);
}

/* Secondary — outlined transparent */
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border2);
}
.btn-secondary:hover {
  border-color: var(--text-dim);
  background: rgba(255,255,255,.03);
}

/* Accent — green fill (app page action buttons) */
.btn-accent {
  background: var(--accent);
  color: #020617;
}
.btn-accent:hover {
  background: var(--accent-h);
  box-shadow: 0 4px 16px rgba(34,197,94,.25);
}

/* Danger — destructive actions */
.btn-danger {
  background: transparent;
  color: var(--error);
  border: 1px solid rgba(248,113,113,.35);
}
.btn-danger:hover {
  background: var(--error);
  color: #fff;
  border-color: var(--error);
}

/* Outline — subtle bordered */
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border2);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-h);
}

/* Small — compact variant */
.btn-small {
  padding: 5px 12px;
  font-size: 0.75rem;
  background: var(--surface2);
  color: var(--text-dim);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
}
.btn-small:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

.btn-icon { font-size: 1.1rem; line-height: 1; }

/* ============================================================
   5. Forms & Inputs (shared)
   ============================================================= */

input[type="text"],
input[type="number"],
input[type="password"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: 9px 13px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.84rem;
  font-family: var(--font-mono);
  transition: all var(--transition);
  outline: none;
  line-height: 1.5;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34,197,94,.12);
}

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

::placeholder { color: var(--text-muted); opacity: 0.7; }

select {
  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='%2394A3B8' 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;
}

/* Field layout */
.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
}

.field-sm { flex: 0 0 110px; }
.flex-2  { flex: 2; }
.flex-3  { flex: 3; }

.field label {
  font-size: 0.73rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hint {
  font-weight: 400;
  text-transform: none;
  color: var(--text-muted);
  letter-spacing: 0;
}
.hint::before { content: "— "; color: var(--border2); }

.field-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

/* Toggle switch */
.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-dim);
  user-select: none;
}
.toggle input { display: none; }

.toggle-track {
  width: 36px;
  height: 20px;
  background: var(--border2);
  border-radius: 99px;
  position: relative;
  transition: all var(--transition);
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-dim);
  border-radius: 50%;
  transition: all var(--transition);
}
.toggle input:checked + .toggle-track {
  background: var(--accent-d);
}
.toggle input:checked + .toggle-track::after {
  left: 18px;
  background: var(--accent-h);
}

/* ============================================================
   6. Landing: Navigation
   ============================================================= */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  font-family: var(--font-heading);
  color: #020617;
}

.nav-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-link:hover { color: var(--text); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-body);
  color: #020617;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}
.nav-cta:hover {
  background: var(--accent-h);
  transform: translateY(-1px);
}

/* ============================================================
   7. Landing: Hero
   ============================================================= */

.hero {
  text-align: center;
  padding: 80px 32px 100px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  background: rgba(34,197,94,.08);
  border: 1px solid rgba(34,197,94,.18);
  border-radius: 99px;
  margin-bottom: 28px;
  font-family: var(--font-heading);
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 22px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-dim);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ============================================================
   8. Landing: Section Shared
   ============================================================= */

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
}

.section-label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
  font-family: var(--font-heading);
}

.section-heading {
  text-align: center;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.8px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 52px;
}

/* ============================================================
   9. Landing: Logo Bar
   ============================================================= */

.logo-bar {
  text-align: center;
  padding: 0 32px 60px;
  max-width: 900px;
  margin: 0 auto;
}

.logo-bar-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 20px;
}

.logo-bar-icons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.logo-bar-icon {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-heading);
}

.logo-bar-icon svg { opacity: 0.6; }

/* ============================================================
   10. Landing: Features
   ============================================================= */

.features {
  padding: 60px 32px 100px;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition);
}
.feature-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.3rem;
}
.feature-icon.green  { background: rgba(34,197,94,.1);  color: var(--accent); }
.feature-icon.purple { background: rgba(124,92,252,.1); color: var(--purple); }
.feature-icon.cyan   { background: rgba(0,212,200,.1);  color: var(--cyan); }

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ============================================================
   11. Landing: Code Demo
   ============================================================= */

.code-demo {
  max-width: 760px;
  margin: 0 auto;
}

.code-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.code-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.code-dot.red    { background: #EF4444; }
.code-dot.yellow { background: #FBBF24; }
.code-dot.green  { background: #22C55E; }

.code-title {
  margin-left: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-body);
}

.code-body {
  padding: 24px 22px;
  overflow-x: auto;
}

.code-body pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--text-dim);
  margin: 0;
  white-space: pre;
}

/* Syntax highlighting */
.code-body .kw  { color: #C084FC; }
.code-body .str { color: #4ADE80; }
.code-body .fn  { color: #60A5FA; }
.code-body .cm  { color: #64748B; font-style: italic; }
.code-body .num { color: #FB923C; }

/* ============================================================
   12. Landing: How It Works / Steps
   ============================================================= */

.steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 680px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  font-family: var(--font-heading);
  color: #020617;
}
.step-num.green  { background: var(--accent); }
.step-num.purple { background: var(--purple); }
.step-num.cyan   { background: var(--cyan); }

.step-content h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  letter-spacing: -0.3px;
}

.step-content p {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.step-content code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--accent);
  background: rgba(34,197,94,.08);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
}

/* ============================================================
   13. Landing: CTA
   ============================================================= */

.cta-section {
  text-align: center;
  padding: 100px 32px;
  max-width: 650px;
  margin: 0 auto;
}

.cta-section h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 14px;
}

.cta-section p {
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}

/* ============================================================
   14. Landing: Footer
   ============================================================= */

.footer {
  border-top: 1px solid var(--border);
  padding: 32px;
  text-align: center;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text); }

/* ============================================================
   15. App: Header
   ============================================================= */

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.header-brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  background: linear-gradient(135deg, var(--accent-h), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-dim);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
  letter-spacing: 0.2px;
}

.header-config {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.config-group label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
}

.config-group input {
  width: 260px;
  padding: 8px 12px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

/* ============================================================
   16. App: Tabs
   ============================================================= */

.tabs {
  display: flex;
  gap: 2px;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 12px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: var(--font-body);
  letter-spacing: 0.1px;
}
.tab:hover { color: var(--text); background: rgba(255,255,255,.02); }
.tab.active {
  color: var(--accent-h);
  border-bottom-color: var(--accent);
}
.tab svg {
  width: 18px;
  height: 18px;
  opacity: 0.7;
  flex-shrink: 0;
}
.tab.active svg { opacity: 1; color: var(--accent); }

/* ============================================================
   17. App: Panel System
   ============================================================= */

.panel { display: none; padding: 24px; }
.panel.active { display: block; animation: fadeIn .25s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   18. App: Cards
   ============================================================= */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}
.card:hover { border-color: var(--border2); }

.card-wide { max-width: 820px; }

.card h3 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text);
}

.card-desc {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.card-danger {
  border-color: rgba(248,113,113,.2);
}
.card-danger:hover {
  border-color: rgba(248,113,113,.4);
}

/* ============================================================
   19. App: Results Panel
   ============================================================= */

.results {
  margin: 0 24px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.results-header h2 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
}

.results-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  opacity: 0;
  transition: opacity var(--transition);
}
.status-pill.ok    { opacity: 1; background: rgba(45,212,191,.15); color: var(--success); }
.status-pill.error { opacity: 1; background: rgba(248,113,113,.15); color: var(--error); }
.status-pill.info  { opacity: 1; background: rgba(34,197,94,.12); color: var(--accent); }

.res-time {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.results-body {
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text-dim);
  background: var(--code-bg);
  overflow-x: auto;
  max-height: 460px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.results-body.json-loaded { color: var(--text); }

/* ============================================================
   20. App: Inline Result & Table Chips
   ============================================================= */

.inline-result {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  max-height: 160px;
  overflow-y: auto;
  white-space: pre-wrap;
}
.inline-result:empty { display: none; }

.result-count {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: 10px;
  font-family: var(--font-mono);
}
.result-count:empty { display: none; }

.table-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  font-size: 0.78rem;
  font-family: var(--font-body);
  color: var(--text-dim);
  margin: 2px 4px 2px 0;
}
.table-chip svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

/* ============================================================
   21. App: Toast
   ============================================================= */

.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  z-index: 999;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: #fff;
  box-shadow: 0 6px 24px rgba(0,0,0,.4);
  animation: slideIn .3s ease;
  max-width: 380px;
  backdrop-filter: blur(12px);
}
.toast.success { background: rgba(45,212,191,.9); }
.toast.error   { background: rgba(248,113,113,.9); }
.toast.info    { background: rgba(34,197,94,.9); }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   22. Scrollbar
   ============================================================= */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================================
   23. Responsive
   ============================================================= */

@media (max-width: 768px) {
  /* Nav */
  .nav { padding: 14px 20px; }
  .nav-links { gap: 14px; }
  .nav-link { font-size: 0.82rem; }
  .nav-cta { padding: 7px 16px; font-size: 0.8rem; }

  /* Hero */
  .hero { padding: 50px 20px 70px; }
  .hero h1 { font-size: 2.2rem; }
  .hero-sub { font-size: 1rem; }

  /* Sections */
  .section { padding: 50px 20px; }
  .features { padding: 30px 20px 70px; }
  .feature-grid { grid-template-columns: 1fr; }
  .logo-bar-icons { gap: 28px; }

  /* Code */
  .code-body { padding: 18px 14px; }
  .code-body pre { font-size: 0.74rem; }

  /* Buttons */
  .btn { padding: 11px 22px; font-size: 0.88rem; }

  /* Footer */
  .footer-content { flex-direction: column; text-align: center; }

  /* App: Header */
  .header {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 16px;
  }
  .header-config {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }
  .config-group input { width: 100%; }

  /* App: Tabs */
  .tabs { padding: 0 12px; gap: 0; }
  .tab { padding: 10px 14px; font-size: 0.78rem; }

  /* App: Panels & Cards */
  .panel { padding: 16px; }
  .card-grid { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; }
  .field-sm { flex: 1; }

  /* App: Results */
  .results { margin: 0 12px 16px; }
}

@media (max-width: 480px) {
  .nav-link.hide-mobile { display: none; }
  .hero h1 { font-size: 1.9rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ============================================================
   24. Reduced Motion
   ============================================================= */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}