/* ===================================================
   PromptTune – styles.css
   Aesthetic: Editorial minimalism meets indie developer
   Font: DM Serif Display + DM Mono
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

/* ── Tokens ─────────────────────────────────────── */
:root {
  --bg:           #f7f5f0;
  --surface:      #ffffff;
  --surface-alt:  #f0ede8;
  --border:       #e2ddd6;
  --text:         #1a1714;
  --text-2:       #5c5650;
  --text-3:       #9c958e;
  --accent:       #2d4a3e;
  --accent-light: #e8f0ed;
  --accent-2:     #c4793a;
  --accent-2-light: #fdf0e6;
  --radius:       10px;
  --radius-lg:    16px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:       0 4px 16px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.04);
  --shadow-lg:    0 16px 40px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.05);
  --transition:   0.18s ease;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
  --max-w:        1160px;
  --header-h:     64px;
}

[data-theme="dark"] {
  --bg:           #111010;
  --surface:      #1c1b1a;
  --surface-alt:  #242322;
  --border:       #2e2c2a;
  --text:         #f0ede8;
  --text-2:       #a09890;
  --text-3:       #665f58;
  --accent:       #5a9e84;
  --accent-light: #1a2e28;
  --accent-2:     #d98b50;
  --accent-2-light: #2a1d10;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.3);
  --shadow:       0 4px 16px rgba(0,0,0,.4);
  --shadow-lg:    0 16px 40px rgba(0,0,0,.5);
}

/* ── Reset ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: inherit; }
textarea, input, select { font-family: inherit; }
ul, ol { list-style: none; }

/* ── Layout ──────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 20px;
}
.section { padding-block: 80px; }
.section--alt { background: var(--surface-alt); }
.section--surface { background: var(--surface); }

/* ── Header ──────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(247,245,240,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}
[data-theme="dark"] .site-header {
  background: rgba(17,16,16,0.88);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover { text-decoration: none; opacity: 0.85; }
.logo-icon {
  width: 30px;
  height: 30px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-family: var(--font-mono);
  font-weight: 500;
  flex-shrink: 0;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.site-nav a {
  color: var(--text-2);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}
.site-nav a:hover {
  background: var(--surface-alt);
  color: var(--text);
  text-decoration: none;
}
.site-nav a.active { color: var(--accent); }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--text-2);
  font-size: 15px;
  transition: background var(--transition), border-color var(--transition);
  line-height: 1;
}
.theme-toggle:hover {
  background: var(--surface-alt);
  color: var(--text);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--text-2);
  font-size: 18px;
  line-height: 1;
}

/* ── Hero ────────────────────────────────────────── */
.hero {
  background: var(--surface);
  padding-top: 56px;
  padding-bottom: 0;
  border-bottom: 1px solid var(--border);
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid currentColor;
  border-radius: 99px;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 18px;
  max-width: 18ch;
}
.hero__title em {
  font-style: italic;
  color: var(--accent);
}
.hero__sub {
  font-size: 1.1rem;
  color: var(--text-2);
  max-width: 44ch;
  line-height: 1.7;
  margin-bottom: 28px;
}
.hero__stats {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.hero__stat {
  display: flex;
  flex-direction: column;
}
.hero__stat-val {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text);
}
.hero__stat-label {
  font-size: 0.8rem;
  color: var(--text-3);
}

/* ── Tool Card ───────────────────────────────────── */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: -1px;
}
.tool-card__header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.tool-card__title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Mode tabs */
.mode-tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-alt);
  border-radius: 8px;
  padding: 3px;
  flex-wrap: wrap;
}
.mode-tab {
  background: none;
  border: none;
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.mode-tab:hover { color: var(--text); }
.mode-tab.active {
  background: var(--surface);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.tool-card__body { padding: 24px; display: flex; flex-direction: column; gap: 20px; }

/* Textarea */
.prompt-section { display: flex; flex-direction: column; gap: 8px; }
.prompt-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.char-count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-3);
}
.prompt-textarea {
  width: 100%;
  min-height: 130px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--text);
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  line-height: 1.6;
}
.prompt-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,74,62,0.12);
}
[data-theme="dark"] .prompt-textarea:focus {
  box-shadow: 0 0 0 3px rgba(90,158,132,0.18);
}

/* Example prompts */
.example-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.example-chip {
  background: none;
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 4px 10px;
  font-size: 0.78rem;
  color: var(--text-2);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  white-space: nowrap;
}
.example-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* Buttons row */
.tool-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1.5px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: #1e3329;
  border-color: #1e3329;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(45,74,62,0.3);
}
.btn-secondary {
  background: var(--surface);
  color: var(--text-2);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--surface-alt);
  color: var(--text);
  border-color: var(--text-3);
}
.btn-ghost {
  background: none;
  color: var(--text-3);
  border-color: transparent;
  padding: 10px 12px;
}
.btn-ghost:hover { color: var(--text); background: var(--surface-alt); }

/* Output area */
.output-section { display: none; flex-direction: column; gap: 10px; }
.output-section.visible { display: flex; }
.output-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.output-box {
  background: var(--accent-light);
  border: 1.5px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 100px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  transition: background var(--transition), border-color var(--transition);
}
.output-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── Toast ───────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text);
  color: var(--bg);
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.22s, transform 0.22s;
  pointer-events: none;
  z-index: 999;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ── Cookie Banner ───────────────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  z-index: 200;
  box-shadow: 0 -4px 20px rgba(0,0,0,.08);
}
.cookie-banner p {
  font-size: 0.88rem;
  color: var(--text-2);
  flex: 1;
  min-width: 200px;
}
.cookie-banner p a { color: var(--accent); }
.cookie-banner .btn { flex-shrink: 0; padding: 8px 16px; font-size: 0.85rem; }

/* ── How it Works ────────────────────────────────── */
.how-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.how-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}
.how-step:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.how-step__num {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--border);
  line-height: 1;
  margin-bottom: 12px;
  transition: color var(--transition);
}
.how-step:hover .how-step__num { color: var(--accent-light); }
.how-step__title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
}
.how-step__desc {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ── Use Cases ───────────────────────────────────── */
.usecases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 48px;
}
.usecase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.usecase-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.usecase-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}
.usecase-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 6px;
}
.usecase-desc {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.5;
}

/* ── Benefits ────────────────────────────────────── */
.benefits-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 48px;
}
.benefit {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.benefit-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}
.benefit-text h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.benefit-text p { font-size: 0.85rem; color: var(--text-2); line-height: 1.5; }

/* ── FAQ ─────────────────────────────────────────── */
.faq-list {
  max-width: 720px;
  margin: 48px auto 0;
}
.faq-item {
  border-top: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: color var(--transition);
}
.faq-q:hover { color: var(--accent); }
.faq-q span.icon {
  color: var(--text-3);
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-q span.icon { transform: rotate(45deg); color: var(--accent); }
.faq-a {
  display: none;
  padding-bottom: 20px;
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
}
.faq-item.open .faq-a { display: block; }
.faq-a a { color: var(--accent); }

/* ── Section headings ────────────────────────────── */
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 52ch;
  line-height: 1.65;
}
.text-center { text-align: center; }
.text-center .section-sub { margin-inline: auto; }

/* ── Ad placeholders ─────────────────────────────── */
.ad-slot {
  background: repeating-linear-gradient(
    -45deg,
    var(--surface-alt),
    var(--surface-alt) 4px,
    var(--bg) 4px,
    var(--bg) 12px
  );
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-align: center;
}
.ad-slot--banner { height: 90px; margin-block: 40px; }
.ad-slot--rect { height: 250px; margin-block: 24px; }

/* ── Footer ──────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-block: 48px 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-top: 12px;
  max-width: 32ch;
  line-height: 1.6;
}
.footer-col h5 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  font-family: var(--font-mono);
  margin-bottom: 14px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a {
  font-size: 0.9rem;
  color: var(--text-2);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-3);
}

/* ── Inner page hero ─────────────────────────────── */
.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding-block: 56px;
}
.page-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  margin-bottom: 14px;
}
.page-hero__sub {
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 48ch;
  line-height: 1.65;
}

/* ── Prose content ───────────────────────────────── */
.prose {
  max-width: 720px;
  margin-inline: auto;
}
.prose h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--text);
}
.prose h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 10px;
}
.prose p {
  font-size: 0.98rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 16px;
}
.prose p:last-child { margin-bottom: 0; }
.prose ul {
  list-style: disc;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}
.prose ul li { font-size: 0.98rem; color: var(--text-2); line-height: 1.65; }
.prose a { color: var(--accent); }
.prose hr { border: none; border-top: 1px solid var(--border); margin-block: 40px; }

/* ── Contact form ────────────────────────────────── */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 560px;
  margin: 48px auto 0;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
}
.form-group input,
.form-group textarea {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,74,62,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ── Privacy / Terms ─────────────────────────────── */
.legal-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 4px;
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 768px) {
  .site-nav { display: none; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--border); padding: 12px 20px 20px; gap: 2px; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; border-radius: 8px; }
  .nav-toggle { display: flex; }
  .hero { padding-top: 40px; }
  .hero__stats { gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding-block: 56px; }
}
@media (max-width: 480px) {
  .mode-tabs { gap: 2px; }
  .mode-tab { padding: 5px 9px; font-size: 0.77rem; }
  .tool-actions { flex-direction: column; }
  .tool-actions .btn { justify-content: center; }
  .output-actions { flex-direction: column; }
  .output-actions .btn { justify-content: center; }
}

/* ── Spinner ─────────────────────────────────────── */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ── Fade in ─────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.4s ease both; }
.fade-up-2 { animation: fadeUp 0.4s ease 0.1s both; }
.fade-up-3 { animation: fadeUp 0.4s ease 0.2s both; }

/* ── Utility ─────────────────────────────────────── */
.visually-hidden { position: absolute; width: 1px; height: 1px; clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap; }
.mt-0 { margin-top: 0 !important; }