/* AI Shorts Optimizer — design system */

:root {
  --bg: #08090b;
  --surface: #0e1013;
  --surface-2: #131519;
  --border: #202329;
  --border-strong: #2c2f36;
  --text: #eceef1;
  --text-dim: #9a9ea7;
  --text-faint: #63676f;
  --accent: #6ee7b7;
  --accent-strong: #34d399;
  --accent-contrast: #05130d;
  --danger: #f87171;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.03) inset;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
}

a { color: inherit; }

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

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 9, 11, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text);
}
.brand-mark {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  display: inline-block;
}
.brand-ai { color: var(--text-dim); font-weight: 500; }

.nav nav { display: flex; align-items: center; gap: 1.6rem; }
.nav nav a {
  text-decoration: none;
  color: var(--text-dim);
  font-size: 0.92rem;
  transition: color 0.15s ease;
}
.nav nav a:hover { color: var(--text); }
.nav-cta {
  color: var(--accent-contrast) !important;
  background: var(--accent);
  padding: 0.5rem 0.95rem;
  border-radius: 8px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent-strong); }

@media (max-width: 720px) {
  .nav nav a:not(.nav-cta) { display: none; }
}

/* Hero */
.hero {
  padding: 5.5rem 1.5rem 3.5rem;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}
.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.12;
  margin: 0 0 1.1rem;
  letter-spacing: -0.02em;
}
.hero-sub {
  color: var(--text-dim);
  font-size: 1.08rem;
  max-width: 560px;
  margin: 0 auto 2rem;
}
.hero-actions {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-note {
  margin-top: 1.1rem;
  font-size: 0.82rem;
  color: var(--text-faint);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: var(--radius);
  padding: 0.7rem 1.3rem;
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
  font-family: inherit;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn-primary:hover { background: var(--accent-strong); }
.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--text-dim); }
.btn-large { padding: 0.85rem 1.8rem; font-size: 1rem; }

.btn-copy {
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  border-radius: 7px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
}
.btn-copy:hover { border-color: var(--accent); color: var(--accent); }

/* Sections */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
}
.section-inner h2 {
  font-size: 1.7rem;
  margin: 0 0 2.2rem;
  letter-spacing: -0.01em;
}

/* Analyzer */
.analyzer { border-bottom: 1px solid var(--border); background: var(--surface); }
.analyzer-inner { max-width: 880px; margin: 0 auto; padding: 3.5rem 1.5rem; }

.analyzer-form {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}
.field-full { grid-column: 1 / -1; }
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}
.field .optional {
  font-weight: 400;
  color: var(--text-faint);
}

.field input,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text);
  padding: 0.65rem 0.8rem;
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.15s ease;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }
.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  outline: none;
}
.field textarea { resize: vertical; min-height: 180px; line-height: 1.5; }

.field-script-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.char-count { font-size: 0.78rem; color: var(--text-faint); }

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.4rem;
}
.form-error {
  color: var(--danger);
  font-size: 0.86rem;
  margin: 0;
  min-height: 1.2em;
}

/* Analyzing state */
.analyzing {
  text-align: center;
  padding: 3rem 1rem;
}
.hidden { display: none !important; }
.spinner {
  width: 34px;
  height: 34px;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  border: 3px solid var(--border-strong);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.analyzing-step {
  color: var(--text-dim);
  font-size: 0.95rem;
  transition: opacity 0.2s ease;
}

/* Results */
.results { margin-top: 2rem; display: flex; flex-direction: column; gap: 1.5rem; }
.result-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  animation: fadein 0.35s ease both;
}
@keyframes fadein {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.result-card h3 {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.summary-headline { font-size: 1.15rem; margin: 0 0 0.6rem; }
.summary-score {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.summary-score-label { color: var(--text-dim); font-size: 0.85rem; margin-left: 0.4rem; }
.summary-note {
  color: var(--text-faint);
  font-size: 0.82rem;
  margin-top: 0.9rem;
  border-top: 1px solid var(--border);
  padding-top: 0.9rem;
}

.scores-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
@media (max-width: 560px) {
  .scores-grid { grid-template-columns: repeat(2, 1fr); }
}
.score-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
}
.score-value { font-size: 1.5rem; font-weight: 700; }
.score-bar {
  height: 4px;
  background: var(--border-strong);
  border-radius: 2px;
  margin: 0.5rem 0 0.4rem;
  overflow: hidden;
}
.score-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.5s ease;
}
.score-label { font-size: 0.78rem; color: var(--text-dim); }

.subblock { margin-bottom: 1.1rem; }
.subblock:last-child { margin-bottom: 0; }
.subblock-label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  margin: 0 0 0.35rem;
}
.subblock-text { margin: 0; color: var(--text); }
.issue-list { margin: 0; padding-left: 1.1rem; color: var(--text-dim); }

.alt-list { display: flex; flex-direction: column; gap: 0.5rem; }
.alt-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
}

.retention-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}
.retention-row:last-child { border-bottom: none; }
.retention-time { color: var(--accent); font-weight: 600; font-size: 0.88rem; }
.retention-friction { color: var(--danger); font-size: 0.85rem; margin-top: 0.3rem; }

.script-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 640px) {
  .script-compare { grid-template-columns: 1fr; }
}
.script-col {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
}
.script-col-title {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.script-col-before .script-col-title { color: var(--text-faint); }
.script-col-after .script-col-title { color: var(--accent); }
.script-col p { white-space: pre-wrap; margin: 0; font-size: 0.9rem; }

.titles-list, .hashtags-list, .recommendations-list { display: flex; flex-direction: column; gap: 0.55rem; }
.title-item, .rec-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
}
.title-style {
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  display: block;
  margin-bottom: 0.15rem;
}
.hashtags-wrap { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.hashtag-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.84rem;
  color: var(--accent);
}

.priority-tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  flex-shrink: 0;
}
.priority-alta { background: rgba(248, 113, 113, 0.15); color: #fca5a5; }
.priority-media { background: rgba(251, 191, 36, 0.15); color: #fcd34d; }
.priority-baja { background: rgba(110, 231, 183, 0.15); color: var(--accent); }

/* How it works / features / faq */
.how-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
@media (max-width: 760px) { .how-steps { grid-template-columns: 1fr; } }
.how-steps li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.9rem;
}
.how-steps h3 { margin: 0 0 0.4rem; font-size: 1.02rem; }
.how-steps p { margin: 0; color: var(--text-dim); font-size: 0.92rem; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
@media (max-width: 760px) { .features-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
}
.feature-card h3 { margin: 0 0 0.5rem; font-size: 0.98rem; }
.feature-card p { margin: 0; color: var(--text-dim); font-size: 0.88rem; }

.faq-list { display: flex; flex-direction: column; gap: 0.7rem; max-width: 720px; }
.faq-list details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
}
.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
}
.faq-list p { color: var(--text-dim); margin: 0.7rem 0 0; font-size: 0.9rem; }

.site-footer { border-top: 1px solid var(--border); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 2rem 1.5rem;
  color: var(--text-faint);
  font-size: 0.85rem;
}
.footer-inner nav { display: flex; gap: 1.2rem; }
.footer-inner a { text-decoration: none; color: var(--text-faint); }
.footer-inner a:hover { color: var(--text); }

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-size: 0.86rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Legal pages */
.legal {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}
.legal h1 { font-size: 1.8rem; margin-bottom: 1.5rem; }
.legal h2 { font-size: 1.1rem; margin-top: 2rem; }
.legal p, .legal li { color: var(--text-dim); font-size: 0.94rem; }
.legal a.back { display: inline-block; margin-bottom: 2rem; color: var(--accent); text-decoration: none; }