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

html {
  height: 100%;
  color-scheme: light dark;
  scroll-behavior: smooth;
}

html[data-theme="light"] {
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

:root {
  --font-hand: 'Caveat', cursive;
  --bg: #f2f0ec;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #3b4cf5;
  --accent-bg: rgba(59, 76, 245, 0.15);
  --surface: #ffffff;
  --nav-border: rgba(0, 0, 0, 0.06);
}

:root[data-theme="dark"] {
  --bg: #0e0e0e;
  --fg: #ececec;
  --muted: #999999;
  --accent: #6b7cff;
  --accent-bg: rgba(107, 124, 255, 0.15);
  --surface: #1a1a1a;
  --nav-border: rgba(255, 255, 255, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0e0e0e;
    --fg: #ececec;
    --muted: #999999;
    --accent: #6b7cff;
    --accent-bg: rgba(107, 124, 255, 0.15);
    --surface: #1a1a1a;
    --nav-border: rgba(255, 255, 255, 0.08);
  }

  :root:not([data-theme]) .sun-icon {
    opacity: 0;
    transform: rotate(-180deg);
  }

  :root:not([data-theme]) .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
  }
}

body {
  min-height: 100vh;
  font-family: var(--font-hand);
  background: var(--bg);
  color: var(--fg);
  transition: background-color 0.35s ease, color 0.35s ease;
  font-size: 20px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 48px;
  border-bottom: 1px solid var(--nav-border);
}

.nav-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--fg);
  line-height: 1;
}

.nav-logo-name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-logo-sub {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
  transition: opacity 0.2s;
}

.nav-link:hover {
  opacity: 0.6;
}

.nav-github-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1.5px solid var(--fg);
  border-radius: 30px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
  transition: all 0.2s ease;
  line-height: 1;
}

.nav-github-badge:hover {
  background: var(--fg);
  color: var(--bg);
}

.nav-github-badge:hover .star-count-badge {
  background: var(--bg);
  color: var(--fg);
}

.nav-github-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.star-count-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--nav-border);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  transition: all 0.2s ease;
}

.star-icon {
  color: #e3b341;
  width: 13px !important;
  height: 13px !important;
}

.hero {
  padding: 80px 48px 60px;
  max-width: 900px;
  position: relative;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero-highlight {
  display: inline;
  background: var(--accent-bg);
  padding: 0 8px;
  border: 2px solid var(--accent);
  position: relative;
}

.hero-subtitle {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 400;
  color: var(--muted);
  margin-top: 28px;
  max-width: 540px;
}

.hero-subtitle em {
  font-style: italic;
  color: var(--fg);
}

.dot {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
}

.dot-1 {
  left: 38px;
  top: 55%;
}

.dot-2 {
  right: 80px;
  top: 62%;
}

.sections {
  padding: 0 48px 60px;
  max-width: 900px;
}

.section-block {
  margin-bottom: 56px;
}

.section-text {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1.55;
  color: var(--muted);
  max-width: 600px;
}

.section-text strong {
  color: var(--fg);
  font-weight: 600;
}

.app-row {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-bottom: 48px;
}

.app-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
  flex-shrink: 0;
}

:root[data-theme="dark"] .app-icon {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

.app-name {
  font-size: 1.6rem;
  font-weight: 700;
}

.app-tagline {
  font-size: 1.1rem;
  color: var(--muted);
  font-weight: 400;
}

.download-section {
  margin-bottom: 56px;
}

.download-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.download-heading {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 500;
  color: var(--fg);
}

.os-tabs {
  display: inline-flex;
  background: var(--nav-border);
  padding: 4px;
  border-radius: 30px;
  gap: 4px;
}

.os-tab-btn {
  font-family: inherit;
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 6px 16px;
  border-radius: 24px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.os-tab-btn:hover {
  color: var(--fg);
}

.os-tab-btn.active {
  background: var(--fg);
  color: var(--bg);
}

.os-panel {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.os-panel.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.download-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.download-btn {
  font-family: inherit;
  background: var(--fg);
  color: var(--bg);
  border: 2px solid var(--fg);
  border-radius: 14px;
  padding: 14px 28px;
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all 0.2s ease;
}

.download-btn:hover {
  background: transparent;
  color: var(--fg);
}

.download-btn:active {
  transform: scale(0.97);
}

.download-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.download-btn .btn-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 4px;
}

.download-subtext {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.download-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--nav-border);
}

.download-stats {
  font-size: 0.95rem;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.all-releases-link {
  font-size: 0.95rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s;
}

.all-releases-link:hover {
  opacity: 0.7;
}

.download-note {
  font-size: 1rem;
  color: var(--muted);
  font-weight: 400;
}

.extra-section {
  margin-bottom: 48px;
}

.extra-text {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  line-height: 1.6;
  color: var(--muted);
  max-width: 600px;
}

.extra-text a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s;
}

.extra-text a:hover {
  opacity: 0.7;
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 48px;
  border-top: 1px solid var(--nav-border);
}

.footer-left {
  display: flex;
  align-items: center;
}

.theme-toggle {
  font-family: inherit;
  background: transparent;
  border: none;
  color: var(--fg);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: opacity 0.2s ease;
  padding: 8px;
}

.theme-toggle:hover {
  opacity: 0.7;
}

.icon-container {
  position: relative;
  width: 24px;
  height: 24px;
}

.sun-icon,
.moon-icon {
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

:root[data-theme="light"] .sun-icon {
  opacity: 1;
  transform: rotate(0deg);
}

:root[data-theme="light"] .moon-icon {
  opacity: 0;
  transform: rotate(180deg);
}

:root[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: rotate(-180deg);
}

:root[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: rotate(0deg);
}

.clock-display {
  font-size: 0.85rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  opacity: 0.5;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  color: var(--fg);
}

.footer-social a:hover {
  opacity: 1;
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-links {
  display: flex;
  align-items: center;
}

.made-by-text {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--fg);
  margin-right: 6px;
}

.link-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.link-label:hover {
  opacity: 0.7;
}

/* Suggestion Section */
.suggestion-section {
  margin-top: 60px;
  margin-bottom: 60px;
  padding: 32px 40px;
  background: var(--surface);
  border: 1px solid var(--nav-border);
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.suggestion-title {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 8px;
}

.suggestion-desc {
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 24px;
}

.suggestion-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.suggestion-input {
  flex: 1;
  min-width: 200px;
  padding: 14px 20px;
  font-family: inherit;
  font-size: 1.15rem;
  background: transparent;
  border: 2px solid var(--nav-border);
  border-radius: 12px;
  color: var(--fg);
  transition: border-color 0.2s ease;
}

.suggestion-input:focus {
  outline: none;
  border-color: var(--accent);
}

.suggestion-btn {
  font-family: inherit;
  background: var(--fg);
  color: var(--bg);
  border: 2px solid var(--fg);
  border-radius: 12px;
  padding: 14px 28px;
  cursor: pointer;
  font-size: 1.15rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.suggestion-btn:hover {
  background: transparent;
  color: var(--fg);
}

.suggestion-btn:active {
  transform: scale(0.97);
}

.suggestion-message {
  margin-top: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  display: none;
}
.suggestion-message.success {
  color: #2e8b57;
  display: block;
}
.suggestion-message.error {
  color: #d13b3b;
  display: block;
}

@media (max-width: 768px) {
  .nav {
    padding: 20px 24px;
  }

  .hero {
    padding: 50px 24px 40px;
  }

  .sections {
    padding: 0 24px 40px;
  }

  .footer {
    padding: 20px 24px;
  }

  .dot-1 {
    left: 16px;
  }

  .dot-2 {
    right: 24px;
  }
}

@media (max-width: 480px) {
  .nav {
    padding: 16px 20px;
  }

  .hero {
    padding: 36px 20px 28px;
  }

  .sections {
    padding: 0 20px 28px;
  }

  .footer {
    padding: 16px 20px;
    flex-direction: column;
    gap: 20px;
  }

  .hero-title {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
  }

  .download-buttons {
    flex-direction: column;
  }

  .download-btn {
    width: 100%;
    justify-content: center;
  }

  .app-row {
    flex-direction: column;
    text-align: center;
    gap: 14px;
  }

  .dot {
    display: none;
  }
}