/* kazahana official website - shared styles */

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0085FF;
  --bg: #FFFFFF;
  --surface: #F8F9FA;
  --text: #1A1A1A;
  --text-secondary: #666666;
  --border: #E4E4E4;
  --accent: #FF8FAB;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans JP", "Noto Sans KR", "Noto Sans SC", "Noto Sans TC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1A1A2E;
    --surface: #252540;
    --text: #E8E8E8;
    --text-secondary: #AAAAAA;
    --border: #2E2E42;
  }
}

:root[data-theme="dark"] {
  --bg: #1A1A2E;
  --surface: #252540;
  --text: #E8E8E8;
  --text-secondary: #AAAAAA;
  --border: #2E2E42;
}

:root[data-theme="light"] {
  --bg: #FFFFFF;
  --surface: #F8F9FA;
  --text: #1A1A1A;
  --text-secondary: #666666;
  --border: #E4E4E4;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.material-symbols-rounded {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.header-logo:hover {
  text-decoration: none;
}

.header-logo img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.header-logo span {
  font-size: 18px;
  font-weight: 700;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-select {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

.lang-select:focus {
  border-color: var(--primary);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.theme-toggle:hover {
  border-color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0085FF 0%, #0066CC 50%, #004C99 100%);
  color: #FFFFFF;
  text-align: center;
  padding: 80px 24px;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  margin-bottom: 28px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero p {
  font-size: 17px;
  line-height: 1.7;
  opacity: 0.92;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn-hero:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  text-decoration: none;
}

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

.btn-hero-disabled {
  background: rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.7);
  cursor: default;
  pointer-events: none;
}

.btn-hero .material-symbols-rounded {
  font-size: 20px;
}

.hero-note {
  font-size: 13px;
  opacity: 0.75;
}

.hero-note a {
  color: #FFFFFF;
  text-decoration: underline;
}

/* ===== Section (generic) ===== */
.section {
  padding: 80px 24px;
}

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

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.section-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 48px;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.2s;
}

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

.feature-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* ===== Capabilities ===== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.capability-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: box-shadow 0.2s;
}

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

.capability-item:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.capability-item .material-symbols-rounded {
  font-size: 24px;
  color: var(--primary);
  flex-shrink: 0;
}

.capability-item span:last-child {
  font-size: 14px;
  line-height: 1.4;
}

/* ===== Screenshots ===== */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.screenshot-item {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.screenshot-item img {
  width: 100%;
  display: block;
}

.screenshot-placeholder {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 80px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 15px;
}

.screenshot-label {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 10px;
}

/* ===== Download ===== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.download-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.download-card .material-symbols-rounded {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 12px;
  display: block;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-card .download-info {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--primary);
  color: #FFFFFF;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
}

.btn-download .material-symbols-rounded {
  color: #0070DD;
  transition: color 0.15s;
  line-height: 1;
}

.btn-download:hover {
  background: #0070DD;
  transform: translateY(-1px);
  text-decoration: none;
  color: #FFFFFF;
}

.btn-download:hover .material-symbols-rounded {
  color: #FFFFFF;
}

.btn-download-disabled {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--border);
  color: var(--text-secondary);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: default;
  pointer-events: none;
}

.download-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
}

.download-note a {
  color: var(--primary);
}

/* ===== Support ===== */
.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.support-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.support-card .support-emoji {
  font-size: 36px;
  margin-bottom: 12px;
  display: block;
}

.support-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.support-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.btn-support {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.btn-support:hover {
  background: var(--primary);
  color: #FFFFFF;
  text-decoration: none;
}

.contact-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

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

.contact-box .material-symbols-rounded {
  font-size: 28px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-box h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.contact-box p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Footer ===== */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.footer-links {
  font-size: 12px;
  color: var(--text-secondary);
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--primary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    padding: 56px 20px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 15px;
  }

  .btn-hero {
    padding: 12px 22px;
    font-size: 14px;
  }

  .section {
    padding: 56px 20px;
  }

  .section-title {
    font-size: 22px;
  }

  .features-grid,
  .screenshots-grid,
  .download-grid,
  .support-grid {
    grid-template-columns: 1fr;
  }

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

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