/*
 * demo.css — hand-written fallback CSS for the ReportGen demo UI.
 *
 * PURPOSE OF THIS FILE
 * --------------------
 * This is the development / CI fallback CSS.  It does NOT require a Tailwind
 * build and is committed to the repository so `pytest tests/saas/` passes
 * without any build tools installed locally.
 *
 * In a Docker build the Tailwind v4 standalone CLI overwrites this file:
 *   /tmp/tw -i reportgen/saas/static/demo.src.css \
 *           -o reportgen/saas/static/demo.css --minify
 *
 * Design tokens match docs/visual-language.md and the demo builtin template.
 */

/* =========================================================
   Design tokens
   ========================================================= */
:root {
  --color-teal-deep:    #0F4C5C;
  --color-teal:         #005F6B;
  --color-coral:        #FF8C66;
  --color-mint:         #9ED2B8;
  --color-bg:           #F4F7F6;
  --color-surface:      #FFFFFF;
  --color-text:         #1A2E2E;
  --color-text-soft:    #4A6565;
  --color-border:       #D1DDD9;

  /* Fonts: system-stack first so the page renders offline and without CDN.
     Instrument Serif / Source Sans 3 load from builtin template assets if
     the browser has them cached from prior PDF downloads. */
  --font-heading:  Georgia, "Instrument Serif", serif;
  --font-body:     system-ui, -apple-system, "Source Sans 3", sans-serif;
  --font-mono:     "JetBrains Mono", "Fira Code", ui-monospace, monospace;

  --radius-sm:  0.75rem;
  --radius-md:  1rem;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  min-height: 100vh;
}

/* =========================================================
   Layout helpers
   ========================================================= */
.container {
  max-width: 62rem;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: 4rem;
}

@media (min-width: 640px) {
  .section { padding-block: 6rem; }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
  padding-block: 5rem 4rem;
  text-align: center;
}

@media (min-width: 640px) {
  .hero { padding-block: 8rem 6rem; }
}

/* Radial gradient bloom — single faint teal ellipse */
.gradient-bloom {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 70% 50% at 50% 30%,
    rgba(15, 76, 92, 0.08) 0%,
    transparent 70%);
}

/* SVG noise texture overlay (data URI, no external request) */
.noise-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-teal-deep);
  opacity: 0.6;
  margin-bottom: 1.25rem;
}

.hero-headline {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-teal-deep);
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-soft);
  max-width: 38rem;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

/* =========================================================
   Buttons
   ========================================================= */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.btn-primary {
  background: var(--color-teal-deep);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-teal);
  box-shadow: 0 2px 8px rgba(15, 76, 92, 0.25);
}

.btn-secondary {
  background: transparent;
  color: var(--color-teal-deep);
  border-color: var(--color-teal-deep);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-teal-deep);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-coral);
  outline-offset: 3px;
}

/* =========================================================
   Feature cards
   ========================================================= */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-teal-deep);
  margin-bottom: 0.75rem;
  text-align: center;
}

.section-sub {
  color: var(--color-text-soft);
  text-align: center;
  max-width: 38rem;
  margin-inline: auto;
  margin-bottom: 3rem;
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.card:hover {
  border-color: var(--color-teal-deep);
  box-shadow: 0 2px 12px rgba(15, 76, 92, 0.08);
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-teal-deep);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--color-text-soft);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.card code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

/* =========================================================
   Demo form
   ========================================================= */
.try-it {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

#demo-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 48rem;
  margin-inline: auto;
}

.field-row {
  display: grid;
  gap: 1rem;
}

@media (min-width: 480px) {
  .field-row { grid-template-columns: 1fr 1fr; }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.char-count {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-soft);
}

.char-count.over-limit {
  color: #c0392b;
  font-weight: 600;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field textarea {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  resize: vertical;
  min-height: 14rem;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-teal-deep);
  box-shadow: 0 0 0 3px rgba(15, 76, 92, 0.12);
}

/* Submit button with CSS-only spinner */
.submit-btn {
  align-self: flex-start;
  position: relative;
}

.btn-spinner {
  display: none;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.submit-btn.is-loading .btn-label { opacity: 0.6; }
.submit-btn.is-loading .btn-spinner { display: inline-block; }

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

/* Error banner */
.error-banner {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  color: #991b1b;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
}

/* PDF result area */
#result {
  max-width: 48rem;
  margin-inline: auto;
  margin-top: 2rem;
}

.result-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  justify-content: flex-end;
}

.pdf-preview {
  width: 100%;
  height: 60vh;
  min-height: 400px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

/* =========================================================
   Code examples
   ========================================================= */
.code-examples .container {
  max-width: 52rem;
}

.code-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.code-block summary {
  padding: 0.875rem 1.25rem;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-teal-deep);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
}

.code-block summary::-webkit-details-marker { display: none; }

.code-block summary::before {
  content: "▶";
  font-size: 0.625rem;
  transition: transform 0.15s;
  opacity: 0.6;
}

.code-block[open] summary::before { transform: rotate(90deg); }

.code-block pre {
  margin: 0;
  padding: 1.25rem;
  background: #0d1117;
  overflow-x: auto;
  border-top: 1px solid var(--color-border);
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: #e2e8f0;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 2rem;
  background: var(--color-bg);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-soft);
}

.footer-inner a {
  color: var(--color-teal-deep);
  text-decoration: none;
}

.footer-inner a:hover { text-decoration: underline; }

.rate-note {
  margin-left: auto;
}

/* =========================================================
   Accessibility helpers
   ========================================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}