/* ─────────────────────────────────────────
   shared.css — Toolbox Design System
   Based on ElevenLabs style reference (DESIGN.md)
   ───────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&family=Cormorant+Garamond:ital,wght@0,300;1,300&family=JetBrains+Mono:wght@400&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors */
  --color-eggshell: #fdfcfc;
  --color-powder: #f5f3f1;
  --color-chalk: #e5e5e5;
  --color-fog: #b1b0b0;
  --color-gravel: #777169;
  --color-slate: #a59f97;
  --color-obsidian: #000000;
  --color-signal-blue: #0447ff;
  --color-ember: #ff4704;

  /* Typography */
  --font-waldenburg: 'Cormorant Garamond', 'Georgia', ui-serif, serif;
  --font-inter: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-geist-mono: 'JetBrains Mono', ui-monospace, 'Menlo', monospace;

  /* Type Scale */
  --text-caption: 10px;
  --leading-caption: 1.2;
  --text-body: 14px;
  --leading-body: 1.43;
  --text-body-lg: 16px;
  --leading-body-lg: 1.5;
  --text-subheading: 18px;
  --leading-subheading: 1.44;
  --text-heading-sm: 20px;
  --leading-heading-sm: 1.4;
  --text-heading: 32px;
  --leading-heading: 1.17;
  --tracking-heading: -0.64px;
  --text-heading-lg: 36px;
  --leading-heading-lg: 1.13;
  --tracking-heading-lg: -0.72px;
  --text-display: 48px;
  --leading-display: 1.08;
  --tracking-display: -0.96px;

  /* Spacing */
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-28: 28px;
  --spacing-32: 32px;
  --spacing-36: 36px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-56: 56px;
  --spacing-64: 64px;
  --spacing-72: 72px;
  --spacing-96: 96px;

  /* Border Radius */
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-2xl-2: 20px;
  --radius-3xl: 24px;
  --radius-full: 9999px;

  /* Named radii */
  --radius-tags: 9999px;
  --radius-cards: 16px;
  --radius-badges: 12px;
  --radius-inputs: 4px;
  --radius-modals: 24px;
  --radius-panels: 20px;
  --radius-buttons: 9999px;

  /* Shadows */
  --shadow-subtle: rgba(0, 0, 0, 0.075) 0px 0px 0px 0.5px inset;
  --shadow-subtle-2: rgba(0, 0, 0, 0.06) 0px 0px 0px 1px, rgba(0, 0, 0, 0.04) 0px 1px 2px 0px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;
  --shadow-subtle-4: rgba(0, 0, 0, 0.4) 0px 0px 1px 0px, rgba(0, 0, 0, 0.04) 0px 4px 4px 0px;
  --shadow-subtle-7: rgba(0, 0, 0, 0.4) 0px 0px 1px 0px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;
  --shadow-subtle-9: rgba(0, 0, 0, 0.4) 0px 0px 1px 0px, rgba(0, 0, 0, 0.04) 0px 1px 1px 0px, rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;

  /* Surfaces */
  --surface-page-ground: #fdfcfc;
  --surface-powder-surface: #f5f3f1;
  --surface-card-white: #ffffff;
  --surface-obsidian: #000000;

  /* Layout */
  --page-max-width: 1200px;
  --page-px: 40px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--surface-page-ground);
  color: var(--color-obsidian);
  font-family: var(--font-inter);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ── Utility ── */
.px-page {
  padding-left: var(--page-px);
  padding-right: var(--page-px);
}

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-page-ground);
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 var(--page-px);
  transition: border-bottom 0.2s ease, box-shadow 0.2s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  border-bottom-color: var(--color-chalk);
  box-shadow: rgba(0,0,0,0.03) 0px 1px 0px;
}
.nav-inner {
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--color-obsidian);
  font-family: var(--font-waldenburg);
  font-size: 18px;
  font-weight: 300;
  letter-spacing: -0.2px;
}
.nav-logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav-link {
  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: 400;
  color: var(--color-obsidian);
  text-decoration: none;
  transition: color 0.15s ease;
}
.nav-link:hover {
  color: var(--color-gravel);
}
.nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--color-obsidian);
  color: var(--color-eggshell);
  border: 1px solid var(--color-obsidian);
  border-radius: var(--radius-buttons);
  padding: 0 20px;
  height: 36px;
  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: 500;
  letter-spacing: 0.1px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease, transform 0.12s ease;
  box-shadow: var(--shadow-subtle-2);
  white-space: nowrap;
}
.btn-primary:hover {
  background: #111;
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--surface-card-white);
  color: var(--color-obsidian);
  border: 1px solid var(--color-chalk);
  border-radius: var(--radius-buttons);
  padding: 0 16px;
  height: 36px;
  font-family: var(--font-inter);
  font-size: var(--text-body);
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.12s ease;
  box-shadow: var(--shadow-subtle-2);
  white-space: nowrap;
}
.btn-ghost:hover {
  background: var(--color-powder);
  border-color: #d0d0d0;
  transform: translateY(-1px);
}
.btn-ghost:active {
  transform: translateY(0);
}

/* Danger variant */
.btn-danger {
  background: #fee2e2;
  color: #dc2626;
  border-color: #fecaca;
}
.btn-danger:hover {
  background: #fecaca;
}

/* ── Form Elements ── */
.input-field {
  width: 100%;
  background: var(--surface-card-white);
  border: 1px solid var(--color-chalk);
  border-radius: var(--radius-inputs);
  padding: 12px 16px;
  font-family: var(--font-inter);
  font-size: var(--text-body);
  color: var(--color-obsidian);
  line-height: 1.5;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  box-shadow: var(--shadow-subtle);
  -webkit-appearance: none;
}
.input-field::placeholder {
  color: var(--color-slate);
}
.input-field:focus {
  border-color: var(--color-obsidian);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.06);
}

.textarea-field {
  width: 100%;
  background: var(--surface-card-white);
  border: 1px solid var(--color-chalk);
  border-radius: var(--radius-inputs);
  padding: 14px 16px;
  font-family: var(--font-geist-mono);
  font-size: 13px;
  color: var(--color-obsidian);
  line-height: 1.7;
  outline: none;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  box-shadow: var(--shadow-subtle);
  -webkit-appearance: none;
}
.textarea-field::placeholder {
  color: var(--color-slate);
  font-family: var(--font-inter);
}
.textarea-field:focus {
  border-color: var(--color-obsidian);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.06);
}

/* ── Card ── */
.card {
  background: var(--surface-card-white);
  border-radius: var(--radius-cards);
  box-shadow: var(--shadow-subtle-7);
  padding: 28px;
  position: relative;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-cards);
  box-shadow: var(--shadow-subtle);
  pointer-events: none;
}

/* ── Label ── */
.field-label {
  display: block;
  font-family: var(--font-inter);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-gravel);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

/* ── Toast / Status ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-obsidian);
  color: var(--color-eggshell);
  font-family: var(--font-inter);
  font-size: var(--text-body);
  padding: 10px 20px;
  border-radius: var(--radius-buttons);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 9999;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.success { background: #16a34a; }
.toast.error   { background: #dc2626; }

/* ── Page Layout helpers ── */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.page-content {
  flex: 1;
  padding: 64px var(--page-px) 120px;
}
.content-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
}

/* ── Page Header ── */
.page-header {
  margin-bottom: 48px;
}
.page-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.page-dot {
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  flex-shrink: 0;
}
.page-eyebrow-text {
  font-family: var(--font-inter);
  font-size: var(--text-body);
  color: var(--color-gravel);
}
.page-title {
  font-family: var(--font-waldenburg);
  font-size: var(--text-heading-lg);
  font-weight: 300;
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
  color: var(--color-obsidian);
  margin-bottom: 12px;
}
.page-subtitle {
  font-family: var(--font-inter);
  font-size: var(--text-body-lg);
  color: var(--color-gravel);
  line-height: 1.6;
  max-width: 560px;
}

/* ── Footer (shared) ── */
.page-footer {
  border-top: 1px solid var(--color-chalk);
  padding: 28px var(--page-px);
}
.page-footer-inner {
  max-width: var(--page-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.page-footer-brand {
  font-family: var(--font-waldenburg);
  font-size: 16px;
  font-weight: 300;
  color: var(--color-obsidian);
  text-decoration: none;
}
.page-footer-copy {
  font-family: var(--font-inter);
  font-size: 13px;
  color: var(--color-slate);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  :root { --page-px: 20px; }
  .nav-links { display: none; }
  .page-content { padding: 40px var(--page-px) 80px; }
}

/* ── Animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.spinner {
  width: 14px;
  height: 14px;
  border: 1.5px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 9999px;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}