/* ============================================
   Scoop — Design System
   ============================================ */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: #eef2ff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-red: #ef4444;
  --color-green: #10b981;
  --color-green-bg: #ecfdf5;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
}

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); font-size: 1rem; line-height: 1.6; color: var(--color-text); background: var(--color-bg); }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }

/* Layout */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-align: center;
}

.section__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--space-md);
}

/* ── Button ─────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--color-primary);
  color: #fff;
}

.btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn--sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn--lg { padding: 1.125rem 2.5rem; font-size: 1.125rem; white-space: nowrap; }
.btn--full { width: 100%; }

.spinner { width: 18px; height: 18px; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Nav ────────────────────────────────── */

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.nav--scrolled { border-bottom-color: var(--color-border); }

.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }

.nav__logo { display: flex; align-items: center; gap: var(--space-sm); font-weight: 700; font-size: 1.125rem; }
.nav__emoji { font-size: 1.375rem; line-height: 1; }

.nav__links { display: flex; align-items: center; gap: var(--space-xl); font-size: 0.9375rem; color: var(--color-text-secondary); }
.nav__links a:hover { color: var(--color-text); }

/* ── Hero + Signup Form ─────────────────── */

.hero {
  padding: 140px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg) 100%);
}

.hero__badge {
  display: inline-block;
  font-size: 0.8125rem; font-weight: 600;
  color: var(--color-primary);
  background: white; border: 1px solid var(--color-border);
  padding: 0.375rem 1rem; border-radius: 100px;
  margin-bottom: var(--space-xl);
}

.hero__title {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800; letter-spacing: -0.04em; line-height: 1.1;
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-top: var(--space-lg);
  max-width: 560px; margin-left: auto; margin-right: auto;
  line-height: 1.6;
}

/* Hero inline CTA */
.hero__form {
  display: flex;
  gap: var(--space-md);
  max-width: 720px;
  margin: var(--space-2xl) auto 0;
}

.hero__input {
  flex: 1;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  padding: 1.125rem 1.25rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.hero__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.hero__input::placeholder { color: var(--color-text-muted); }

.hero__note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Setup section */
.setup { padding: var(--space-4xl) 0; }

/* Signup form card */
.signup-form {
  max-width: 640px;
  margin: var(--space-2xl) auto 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-xl);
  text-align: left;
}

.signup-form__fields {
  display: grid;
  gap: var(--space-lg);
}

.signup-form__field--full { grid-column: 1 / -1; }

.signup-form__label {
  display: block;
  font-size: 0.875rem; font-weight: 600;
  margin-bottom: var(--space-sm);
}

.signup-form__hint { font-weight: 400; color: var(--color-text-muted); }

.signup-form__input,
.signup-form__textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.signup-form__input:focus,
.signup-form__textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.signup-form__input::placeholder,
.signup-form__textarea::placeholder { color: var(--color-text-muted); }

.signup-form__textarea { resize: vertical; min-height: 140px; line-height: 1.8; }

.signup-form .btn { margin-top: var(--space-lg); }

.signup-form__note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  text-align: center;
}

.signup-form__error {
  font-size: 0.8125rem;
  color: var(--color-red);
  margin-top: var(--space-xs);
}

/* Success state */
.signup-success {
  max-width: 480px;
  margin: var(--space-3xl) auto 0;
  text-align: center;
}

.signup-success__icon { font-size: 3rem; margin-bottom: var(--space-lg); }

.signup-success h2 {
  font-size: 1.5rem; font-weight: 800;
  margin-bottom: var(--space-sm);
}

.signup-success p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ── Steps ──────────────────────────────── */

.steps { padding: var(--space-4xl) 0; background: var(--color-bg-alt); }

.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
}

.steps__item { text-align: center; }

.steps__number {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-primary-light);
  font-size: 1.5rem; border-radius: 50%;
  margin: 0 auto var(--space-lg);
}

.steps__item h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: var(--space-sm); }
.steps__item p { font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.6; }

/* ── FAQ ────────────────────────────────── */

.faq { padding: var(--space-4xl) 0; }

.faq__grid { max-width: 700px; margin: var(--space-3xl) auto 0; }

.faq__item { border-bottom: 1px solid var(--color-border); padding: var(--space-lg) 0; }

.faq__item summary {
  font-size: 1rem; font-weight: 600; cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}

.faq__item summary::after { content: '+'; font-size: 1.25rem; font-weight: 300; color: var(--color-text-muted); transition: transform 0.2s; }
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__item summary::-webkit-details-marker { display: none; }

.faq__item p { font-size: 0.9375rem; color: var(--color-text-secondary); line-height: 1.7; margin-top: var(--space-md); }

/* ── Footer ─────────────────────────────── */

.footer { padding: var(--space-2xl) 0; border-top: 1px solid var(--color-border); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; }
.footer__brand { font-size: 1rem; }
.footer__copy { font-size: 0.8125rem; color: var(--color-text-muted); }

/* ── Responsive ─────────────────────────── */

@media (max-width: 768px) {
  .nav__links a:not(.btn) { display: none; }

  .hero { padding: 120px 0 60px; }
  .hero__subtitle { font-size: 1rem; }
  .hero__form { flex-direction: column; }

  .signup-form { padding: var(--space-xl); }

  .steps__grid { grid-template-columns: 1fr; gap: var(--space-xl); }

  .footer__inner { flex-direction: column; gap: var(--space-md); text-align: center; }

  .steps, .setup, .faq { padding: var(--space-3xl) 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-md); }
  .hero { padding: 100px 0 48px; }
  .hero__title { font-size: 1.75rem; }
  .hero__badge { font-size: 0.75rem; }
  .signup-form { padding: var(--space-lg); }
  .nav__inner { height: 56px; }
  .faq__item summary { font-size: 0.9375rem; }
  .faq__item p { font-size: 0.875rem; }
}