@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ==========================================================================
   MeetJson - Dieter Rams / Braun Design System
   "Weniger, aber besser" (Less, but better)
   ========================================================================== */

:root {
  /* Light Theme */
  --bg: #ffffff;
  --bg-subtle: #f7f7f6;
  --bg-card: #ffffff;
  --bg-terminal: #18181a;
  --fg: #1c1c1e;
  --fg-muted: #6c6c70;
  --accent: #f5a623; /* Braun Iconic Amber / Yellow */
  --accent-hover: #e09415;
  --accent-subtle: rgba(245, 166, 35, 0.12);
  --border: #e5e5e7;
  --border-strong: #d1d1d6;
  --success: #10b981;
  --danger: #ef4444;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;
  
  --container-max: 1040px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

/* System Dark Preference fallback */
@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    --bg: #1c1c1e;
    --bg-subtle: #141416;
    --bg-card: #252528;
    --bg-terminal: #111113;
    --fg: #f5f5f7;
    --fg-muted: #9c9ca4;
    --accent: #f5a623;
    --accent-hover: #ffba42;
    --accent-subtle: rgba(245, 166, 35, 0.15);
    --border: #323236;
    --border-strong: #45454b;
  }
}

/* Explicit Dark Theme Class */
:root.dark {
  --bg: #1c1c1e;
  --bg-subtle: #141416;
  --bg-card: #252528;
  --bg-terminal: #111113;
  --fg: #f5f5f7;
  --fg-muted: #9c9ca4;
  --accent: #f5a623;
  --accent-hover: #ffba42;
  --accent-subtle: rgba(245, 166, 35, 0.15);
  --border: #323236;
  --border-strong: #45454b;
}

/* Explicit Light Theme Class */
:root.light {
  --bg: #ffffff;
  --bg-subtle: #f7f7f6;
  --bg-card: #ffffff;
  --bg-terminal: #18181a;
  --fg: #1c1c1e;
  --fg-muted: #6c6c70;
  --accent: #f5a623;
  --accent-hover: #e09415;
  --accent-subtle: rgba(245, 166, 35, 0.12);
  --border: #e5e5e7;
  --border-strong: #d1d1d6;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

h1 {
  font-size: 2.75rem;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

p strong {
  color: var(--fg);
  font-weight: 600;
}

code, kbd, pre, samp {
  font-family: var(--font-mono);
}

.text-accent {
  color: var(--accent);
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition), border-color var(--transition);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-logo-img {
  height: 32px;
  width: auto;
  display: block;
}

/* Logo theme switching */
:root.dark .brand-logo-light,
:root:not(.light) .brand-logo-light {
  display: none !important;
}
:root.dark .brand-logo-dark,
:root:not(.light) .brand-logo-dark {
  display: block !important;
}

:root.light .brand-logo-dark {
  display: none !important;
}
:root.light .brand-logo-light {
  display: block !important;
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  background-color: var(--bg-subtle);
  color: var(--fg-muted);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--fg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--fg);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 17px;
  height: 17px;
  stroke: currentColor;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
  font-family: var(--font-sans);
}

.btn-primary {
  background-color: var(--accent);
  color: #121212;
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: var(--bg-card);
  color: var(--fg);
  border-color: var(--border);
}

.btn-outline:hover {
  border-color: var(--border-strong);
  background-color: var(--bg-subtle);
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--fg);
  transition: transform var(--transition), opacity var(--transition);
}

/* Hero Section */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid rgba(245, 166, 35, 0.3);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 20px;
  font-weight: 700;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--fg-muted);
  line-height: 1.6;
  max-width: 680px;
  margin-bottom: 36px;
}

/* Install Box - Theme Adaptive */
.install-box {
  width: 100%;
  max-width: 580px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 36px;
  transition: all var(--transition);
}

.install-box:hover {
  border-color: var(--border-strong);
}

.install-code {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--fg);
  overflow-x: auto;
  white-space: nowrap;
}

.install-prompt {
  color: var(--accent);
  font-weight: 700;
  user-select: none;
}

.install-copy-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.install-copy-btn:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #121212;
}

.install-copy-btn.copied {
  background-color: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

/* Agent Support Row */
.agent-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.agent-row-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
}

.agent-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.agent-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  transition: border-color var(--transition);
}

.agent-chip:hover {
  border-color: var(--border-strong);
}

.agent-chip img, .agent-chip svg {
  height: 16px;
  width: auto;
  max-width: 44px;
  object-fit: contain;
  vertical-align: middle;
}

/* Agent chip icon theme switching */
:root.dark .agent-icon-light,
:root:not(.light) .agent-icon-light {
  display: none !important;
}
:root.dark .agent-icon-dark,
:root:not(.light) .agent-icon-dark {
  display: inline-block !important;
  filter: brightness(0) invert(0.96);
}

:root.light .agent-icon-dark {
  display: none !important;
}
:root.light .agent-icon-light {
  display: inline-block !important;
  filter: none;
}

/* Section Common Styling */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}

.section-header {
  margin-bottom: 40px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  display: block;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 10px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--fg-muted);
  max-width: 640px;
}

/* Dieter Rams 4-Pillar Grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.pillar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition);
}

.pillar-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
}

.pillar-title {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.pillar-desc {
  font-size: 13.5px;
  color: var(--fg-muted);
  line-height: 1.55;
  margin-bottom: 0;
}

/* Interactive Playground Section */
.playground-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.playground-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-subtle);
  flex-wrap: wrap;
  gap: 12px;
}

.playground-tabs {
  display: flex;
  gap: 6px;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-muted);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

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

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

.playground-presets {
  display: flex;
  align-items: center;
  gap: 8px;
}

.preset-label {
  font-size: 12px;
  color: var(--fg-muted);
  font-weight: 500;
}

.preset-buttons {
  display: flex;
  gap: 6px;
}

.preset-btn {
  background-color: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.playground-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 280px;
}

.playground-pane {
  display: flex;
  flex-direction: column;
}

.playground-pane:first-child {
  border-right: 1px solid var(--border);
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

.saved-pill {
  color: var(--success);
  font-weight: 600;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.playground-textarea {
  flex: 1;
  width: 100%;
  min-height: 240px;
  background-color: var(--bg-card);
  color: var(--fg);
  border: none;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  outline: none;
}

.playground-output {
  flex: 1;
  padding: 16px;
  background-color: var(--bg-card);
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre-wrap;
  word-break: break-word;
}

/* CLI Commands Table / Grid */
.commands-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.command-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition);
}

.command-card:hover {
  border-color: var(--border-strong);
}

.command-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.command-code {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent);
  background-color: var(--bg-subtle);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.cmd-copy-btn {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.cmd-copy-btn:hover {
  color: var(--fg);
  border-color: var(--border-strong);
}

.command-desc {
  font-size: 13.5px;
  color: var(--fg-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}

.command-example {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-muted);
  background-color: var(--bg-subtle);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--accent);
}

/* ROI Calculator */
.calc-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.calc-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

.calc-val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

.calc-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  -webkit-appearance: none;
  accent-color: var(--accent);
}

.calc-results {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  text-align: center;
}

.calc-stat-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--fg-muted);
  margin-bottom: 4px;
}

.calc-stat-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  font-family: var(--font-mono);
}

.calc-stat-sub {
  font-size: 13px;
  color: var(--fg-muted);
}

/* Pricing Section */
.pricing-card {
  max-width: 520px;
  margin: 0 auto;
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent);
  color: #121212;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 12px;
  border-radius: 999px;
}

.pricing-title {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--fg);
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.pricing-sub {
  color: var(--fg-muted);
  font-size: 13px;
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--fg);
}

.pricing-features li svg {
  color: var(--success);
  flex-shrink: 0;
}

/* Footer */
.footer {
  margin-top: auto;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  background-color: var(--bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--fg-muted);
}

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

.footer-link {
  color: var(--fg-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--accent);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .commands-grid {
    grid-template-columns: 1fr;
  }
  .calc-card {
    grid-template-columns: 1fr;
  }
  .playground-split {
    grid-template-columns: 1fr;
  }
  .playground-pane:first-child {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: flex;
  }
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .install-box {
    flex-direction: column;
    align-items: stretch;
  }
}