/* ============================================
   FlashLeap — Shared Styles
   ============================================ */

:root {
  --accent: #007AFF;
  --accent-hover: #0062CC;
  --accent-light: rgba(0, 122, 255, 0.08);
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F7;
  --bg-card: #FFFFFF;
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1100px;
  --nav-height: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #0A84FF;
    --accent-hover: #409CFF;
    --accent-light: rgba(10, 132, 255, 0.12);
    --bg-primary: #000000;
    --bg-secondary: #1C1C1E;
    --bg-card: #1C1C1E;
    --text-primary: #F5F5F7;
    --text-secondary: #A1A1A6;
    --text-tertiary: #86868B;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.4);
  }
}

/* ---- Reset & Base ---- */

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
    'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---- Layout ---- */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section--alt {
  background: var(--bg-secondary);
}

/* ---- Navigation ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  .nav {
    background: rgba(0, 0, 0, 0.8);
  }
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav__brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav__links a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 980px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1.2;
  white-space: nowrap;
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

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

.btn--primary:hover {
  background: var(--accent-hover);
  color: #FFFFFF;
  transform: scale(1.02);
}

.btn--secondary {
  background: var(--accent-light);
  color: var(--accent);
}

.btn--secondary:hover {
  background: var(--accent);
  color: #FFFFFF;
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
  padding: 12px 16px;
}

/* ---- Hero ---- */

.hero {
  padding-top: calc(var(--nav-height) + 80px);
  padding-bottom: 80px;
  text-align: center;
}

.hero__icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  margin: 0 auto 32px;
  box-shadow: var(--shadow-lg);
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero__title span {
  background: linear-gradient(135deg, var(--accent), #5856D6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--bg-secondary);
  border-radius: 980px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero__badge svg {
  width: 18px;
  height: 18px;
  fill: var(--text-tertiary);
}

/* ---- Features ---- */

.features__header {
  text-align: center;
  margin-bottom: 56px;
}

.features__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.features__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.feature-card__icon--blue { background: rgba(0, 122, 255, 0.12); }
.feature-card__icon--purple { background: rgba(88, 86, 214, 0.12); }
.feature-card__icon--orange { background: rgba(255, 149, 0, 0.12); }
.feature-card__icon--green { background: rgba(52, 199, 89, 0.12); }

.feature-card__title {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---- Screenshots ---- */

.screenshots__header {
  text-align: center;
  margin-bottom: 48px;
}

.screenshots__label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 12px;
}

.screenshots__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.screenshots__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.screenshot-placeholder {
  aspect-ratio: 9 / 19.5;
  background: var(--bg-secondary);
  border: 2px dashed var(--border);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  padding: 20px;
}

.screenshots__grid img {
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

/* ---- CTA Section ---- */

.cta {
  text-align: center;
}

.cta__title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Footer ---- */

.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* ---- Action Page (Email Handler) ---- */

.action-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.action-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 48px 40px;
  max-width: 440px;
  width: 100%;
  text-align: center;
}

.action-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin: 0 auto 24px;
}

.action-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.action-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 28px;
  line-height: 1.6;
}

.action-card__input {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
  margin-bottom: 12px;
  font-family: inherit;
}

.action-card__input:focus {
  border-color: var(--accent);
}

.action-card .btn {
  width: 100%;
  padding: 14px;
  margin-top: 4px;
}

.action-card__status {
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-top: 20px;
  font-size: 0.92rem;
  font-weight: 500;
}

.action-card__status--success {
  background: rgba(52, 199, 89, 0.1);
  color: #34C759;
}

.action-card__status--error {
  background: rgba(255, 59, 48, 0.1);
  color: #FF3B30;
}

.action-card__status--loading {
  background: var(--accent-light);
  color: var(--accent);
}

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 20px auto;
}

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

/* ---- Legal Pages ---- */

.legal {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 80px;
  max-width: 720px;
  margin: 0 auto;
}

.legal h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.legal .legal__date {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: 36px;
}

.legal h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 36px;
  margin-bottom: 12px;
}

.legal p,
.legal li {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.legal ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

/* ---- 404 Page ---- */

.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.error-page__code {
  font-size: 6rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent), #5856D6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}

.error-page__title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.error-page__desc {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .section { padding: 56px 0; }

  .hero {
    padding-top: calc(var(--nav-height) + 48px);
    padding-bottom: 56px;
  }

  .hero__icon {
    width: 88px;
    height: 88px;
    border-radius: 20px;
    margin-bottom: 24px;
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .screenshots__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .nav__links .nav__link--desktop {
    display: none;
  }

  .action-card {
    padding: 36px 24px;
  }
}

@media (max-width: 480px) {
  .screenshots__grid {
    grid-template-columns: 1fr;
    max-width: 260px;
    margin: 0 auto;
  }
}