/* =============================================================================
   Stereogram — Iron Mind AI
   Brand tokens and component patterns sourced from the Iron Mind AI brandbook
   (websites/iron-mind.ai/docs/brandbook.md). Dark mode only.
   ============================================================================= */

/* -----------------------------------------------------------------------------
   0. RESET & BASE
   ----------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* -----------------------------------------------------------------------------
   1. BRAND TOKENS (Brandbook: Color System, Typography, Spacing)
   ----------------------------------------------------------------------------- */

:root {
  /* Colors */
  --color-bg-primary: #0E0E0E;
  --color-bg-surface: #161616;
  --color-bg-elevated: #1C1C1C;
  --color-accent: #E87C2E;
  --color-accent-hover: #F08C3E;
  --color-accent-subtle: rgba(232, 124, 46, 0.12);
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E8EAED;
  --color-text-muted: #888888;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  --color-error: #e05252;

  /* Typography */
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  /* Border radius */
  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 8px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease-out;

  /* Layout */
  --max-width: 780px;
  --nav-height: 64px;
}

/* -----------------------------------------------------------------------------
   1.5 ACCESSIBILITY UTILITIES (Brandbook: Accessibility > .visually-hidden)
   ----------------------------------------------------------------------------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* -----------------------------------------------------------------------------
   2. NAV (minimal — Brandbook: Component Patterns > Navigation)
   ----------------------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}

.nav__inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo img {
  height: 28px;
  width: auto;
}

.nav__product {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-2);
}

.nav__back {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav__back:hover {
  color: var(--color-text-primary);
}

/* -----------------------------------------------------------------------------
   3. MAIN / HERO
   ----------------------------------------------------------------------------- */

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.hero {
  text-align: center;
  max-width: 600px;
}

.hero__label {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 48px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-2);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 16px;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .hero__title {
    font-size: 32px;
  }
}

/* -----------------------------------------------------------------------------
   4. FORM (single input + generate button)
   ----------------------------------------------------------------------------- */

.generator-form {
  width: 100%;
  display: flex;
  gap: var(--space-2);
}

.generator-form__input {
  flex: 1;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px var(--space-3);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.generator-form__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(232, 124, 46, 0.25);
}

.generator-form__input:invalid:not(:placeholder-shown) {
  border-color: var(--color-error);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: filter var(--transition-fast), background var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #0E0E0E;
}

.btn--primary:hover:not(:disabled) {
  filter: brightness(1.08);
}

.btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: none;
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn--ghost:hover {
  background-color: var(--color-accent-subtle);
}

@media (max-width: 600px) {
  .generator-form {
    flex-direction: column;
  }
}

/* -----------------------------------------------------------------------------
   5. LOADING STATE
   Pattern follows Brandbook: Progress / Enrichment Modal — amber-arc spinner
   plus cycling status text. Rendered inline (not a modal) since this is a
   single-purpose page with no other content to obscure.
   ----------------------------------------------------------------------------- */

.status {
  display: none;
  width: 100%;
  max-width: 420px;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
}

.status.is-active {
  display: flex;
}

.status__spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(232, 124, 46, 0.2);
  border-top-color: var(--color-accent);
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.status__text {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.status__hint {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-muted);
}

@media (prefers-reduced-motion: reduce) {
  .status__spinner {
    animation: none;
    border-top-color: var(--color-accent);
  }
}

/* -----------------------------------------------------------------------------
   6. ERROR STATE
   ----------------------------------------------------------------------------- */

.error-banner {
  display: none;
  width: 100%;
  background: rgba(224, 82, 82, 0.08);
  border: 1px solid rgba(224, 82, 82, 0.25);
  color: var(--color-error);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: 14px;
  text-align: center;
}

.error-banner.is-active {
  display: block;
}

/* -----------------------------------------------------------------------------
   7. RESULT
   ----------------------------------------------------------------------------- */

.result {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.result.is-active {
  display: flex;
}

.result__image-wrap {
  width: 100%;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
}

.result__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  display: block;
}

.result__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.result__caption {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 480px;
}

/* -----------------------------------------------------------------------------
   8. FOOTER (minimal — Brandbook: Voice and Microcopy > Footer)
   ----------------------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
  padding: var(--space-4);
  text-align: center;
}

.footer__tagline {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer__tagline a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__tagline a:hover {
  color: var(--color-accent);
}