/* FlexPaste-Solo Web Landing Page & Docs Stylesheet (M3 Design System) */

:root {
  --md-sys-color-primary: #006A6A;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #CCE7E7;
  --md-sys-color-on-primary-container: #002020;

  --md-sys-color-secondary: #4A6363;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #CCE8E8;
  --md-sys-color-on-secondary-container: #051F1F;

  --md-sys-color-surface: #F4FAF9;
  --md-sys-color-surface-dim: #D5DBDA;
  --md-sys-color-surface-container-low: #FFFFFF;
  --md-sys-color-surface-container: #EAEFEF;
  --md-sys-color-surface-container-high: #E4E9E9;
  --md-sys-color-surface-container-highest: #DDE4E3;
  --md-sys-color-on-surface: #161D1D;
  --md-sys-color-on-surface-variant: #3F4948;
  --md-sys-color-outline: #6F7978;
  --md-sys-color-outline-variant: #BEC9C8;

  --md-font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --md-shape-corner-small: 8px;
  --md-shape-corner-medium: 12px;
  --md-shape-corner-large: 16px;
  --md-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.1), 0px 1px 2px 0px rgba(0, 0, 0, 0.15);
  --md-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.12), 0px 1px 2px 0px rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-primary: #80D5D4;
    --md-sys-color-on-primary: #003737;
    --md-sys-color-primary-container: #004F4F;
    --md-sys-color-on-primary-container: #9CF1F0;

    --md-sys-color-secondary: #B0CCCB;
    --md-sys-color-on-secondary: #1B3535;
    --md-sys-color-secondary-container: #324B4B;
    --md-sys-color-on-secondary-container: #CCE8E7;

    --md-sys-color-surface: #0E1414;
    --md-sys-color-surface-dim: #0E1414;
    --md-sys-color-surface-container-low: #171D1D;
    --md-sys-color-surface-container: #1B2121;
    --md-sys-color-surface-container-high: #252B2B;
    --md-sys-color-surface-container-highest: #303636;
    --md-sys-color-on-surface: #DEE4E3;
    --md-sys-color-on-surface-variant: #BEC9C8;
    --md-sys-color-outline: #889392;
    --md-sys-color-outline-variant: #3F4948;

    --md-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.4), 0px 1px 2px 0px rgba(0, 0, 0, 0.6);
    --md-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.4), 0px 1px 2px 0px rgba(0, 0, 0, 0.6);
  }
}

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

body {
  font-family: var(--md-font-family);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  text-decoration: underline;
}

/* Header & Nav */
header.site-header {
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--md-elevation-1);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
}

.brand-icon {
  width: 36px;
  height: 36px;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--md-sys-color-primary);
  letter-spacing: -0.5px;
}

nav.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

@media (max-width: 600px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }

  nav.site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--md-sys-color-primary);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  background-color: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 20px;
  padding: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  transition: all 0.2s;
}

.lang-btn.active {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

/* Main Container */
main.site-content {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 40px 24px;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 40px 0 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  width: 96px;
  height: 96px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  color: var(--md-sys-color-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero-tagline {
  font-size: 18px;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 700px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  border: none;
}

.btn-primary {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--md-elevation-1);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.btn-secondary:hover {
  filter: brightness(0.95);
  text-decoration: none;
}

/* Features Grid */
.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--md-sys-color-on-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.feature-card {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-corner-large);
  padding: 28px;
  box-shadow: var(--md-elevation-1);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--md-sys-color-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
}

/* Document / Detail Pages */
.doc-container {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-corner-large);
  padding: 40px;
  box-shadow: var(--md-elevation-1);
}

.doc-container h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--md-sys-color-primary);
  margin-bottom: 24px;
  border-bottom: 2px solid var(--md-sys-color-primary-container);
  padding-bottom: 12px;
}

.doc-container h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin: 32px 0 16px;
}

.doc-container p, .doc-container li {
  font-size: 15px;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 12px;
}

.doc-container ul, .doc-container ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.doc-container code {
  background-color: var(--md-sys-color-surface-container-highest);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 14px;
}

/* Footer */
footer.site-footer {
  background-color: var(--md-sys-color-surface-container);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding: 24px;
  text-align: center;
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: auto;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 20px;
}