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

:root {
  --blue: #1a73e8;
  --blue-dark: #1557b0;
  --blue-light: #e8f0fe;
  --blue-faint: #f0f6ff;
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f4;
  --gray-200: #dadce0;
  --text: #202124;
  --text-secondary: #5f6368;
  --text-tertiary: #80868b;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: 6px;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
}

.nav-pill:hover {
  background: var(--gray-100);
  color: var(--text);
}

.nav-pill.active {
  background: var(--blue-light);
  color: var(--blue);
}

.nav-pill.ghost {
  border: 1px solid var(--gray-200);
  background: transparent;
}

.nav-pill.ghost:hover {
  background: var(--gray-50);
  border-color: var(--gray-200);
}

/* ─── Hero ─── */
.hero {
  padding: 180px 0 100px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2px;
  margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--text);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 540px;
  margin: 0 auto 48px;
}

.install-pill {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  border-radius: 100px;
  background: var(--blue);
  color: var(--white);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
  user-select: none;
  margin-bottom: 40px;
  box-shadow: 0 2px 12px rgba(26, 115, 232, 0.25);
}

.install-pill:hover {
  background: var(--blue-dark);
  box-shadow: 0 4px 20px rgba(26, 115, 232, 0.35);
  transform: translateY(-1px);
}

.install-pill:active {
  transform: translateY(0);
}

.install-icon {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  opacity: 0.8;
}

.install-text {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
}

.install-copy {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
}

.install-copy.copied {
  opacity: 1;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-pill {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 100px;
  background: var(--gray-50);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1px;
}

/* ─── Sections ─── */
.section {
  padding: 120px 0;
}

.section--gray {
  background: var(--gray-50);
}

.section--blue {
  background: var(--blue-light);
}

.section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 17px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 520px;
  margin: 0 auto 64px;
  line-height: 1.6;
}

/* ─── Problem / Pain Cards ─── */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.pain-card {
  background: var(--white);
  border-radius: 16px;
  padding: 36px 32px;
  text-align: left;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.pain-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: var(--blue-light);
  border-radius: 14px;
}

.pain-icon svg {
  width: 22px;
  height: 22px;
}

.pain-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.pain-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── Features ─── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px 48px;
}

.feature-item {
  text-align: left;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: var(--blue-light);
  border-radius: 14px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feature-desc code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ─── How It Works (Flow) ─── */
.flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.flow-pill {
  padding: 14px 28px;
  border-radius: 100px;
  background: var(--gray-50);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.flow-pill.primary {
  background: var(--blue);
  color: var(--white);
}

.flow-arrow {
  display: flex;
  align-items: center;
  padding-top: 14px;
  color: var(--text-tertiary);
  font-size: 18px;
}

.flow-label {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 140px;
  line-height: 1.5;
}

.flow-note {
  text-align: center;
  font-size: 15px;
  color: var(--text-secondary);
  font-style: italic;
}

/* ─── Architecture Diagram ─── */
.arch-diagram {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.arch-input,
.arch-output {
  text-align: center;
}

.arch-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 20px 40px;
  border-radius: 12px;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
}

.arch-box--input {
  border-color: var(--text-tertiary);
}

.arch-box--output {
  border-color: var(--blue);
  background: var(--blue-light);
}

.arch-box-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.arch-box-detail {
  font-size: 13px;
  color: var(--text-secondary);
}

.arch-arrow-down {
  font-size: 20px;
  color: var(--text-tertiary);
  padding: 12px 0;
}

.arch-layers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  width: 100%;
}

.arch-layer {
  background: var(--gray-50);
  border-radius: 14px;
  overflow: hidden;
}

.arch-layer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
}

.arch-layer-num {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.arch-layer-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.arch-layer-body {
  padding: 20px;
}

.arch-tech {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.arch-layer-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── SigNoz Integration ─── */
.integration-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.integration-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.integration-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.integration-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-light);
  border-radius: 14px;
  flex-shrink: 0;
}

.integration-icon svg {
  width: 22px;
  height: 22px;
}

.integration-label {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.integration-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.integration-detail {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
}

.detail-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: -1px;
  line-height: 1;
}

.detail-text {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ─── CLI Showcase ─── */
.cli-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.terminal {
  background: #1e1e2e;
  border-radius: 16px;
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  gap: 7px;
  padding: 16px 20px;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #45475a;
}

.terminal-dot:nth-child(1) { background: #f38ba8; }
.terminal-dot:nth-child(2) { background: #f9e2af; }
.terminal-dot:nth-child(3) { background: #a6e3a1; }

.terminal-code {
  padding: 0 24px 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: #cdd6f4;
  min-height: 280px;
  white-space: pre;
  overflow-x: auto;
}

.terminal-code .prompt {
  color: #89b4fa;
}

.terminal-code .output {
  color: #6c7086;
}

.terminal-code .success {
  color: #a6e3a1;
}

.terminal-code .highlight {
  color: #f9e2af;
}

.commands-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cmd-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-radius: 12px;
  cursor: default;
  transition: background 0.15s ease;
}

.cmd-item:hover {
  background: var(--gray-100);
}

.cmd-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.cmd-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ─── Numbers ─── */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 48px 32px;
  margin-bottom: 64px;
}

.number-card {
  text-align: center;
}

.number-value {
  display: block;
  font-size: 48px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 8px;
}

.number-unit {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.number-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.tech-stack {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tech-pill {
  padding: 8px 18px;
  border-radius: 100px;
  background: var(--gray-50);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
}

/* ─── Install Section ─── */
.paths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

.path-card {
  background: var(--white);
  border-radius: 16px;
  padding: 36px 32px;
  text-align: center;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

.path-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.path-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.path-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--gray-50);
  display: inline-block;
}

.install-note {
  text-align: center;
  font-size: 14px;
  color: var(--text-tertiary);
}

/* ─── Footer ─── */
.footer {
  padding: 32px 0;
  background: var(--white);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--blue);
}

.footer-text {
  font-size: 14px;
  color: var(--text-tertiary);
}

.footer-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ─── Animations ─── */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .pain-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 32px;
  }

  .arch-layers {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .cli-layout {
    grid-template-columns: 1fr;
  }

  .flow {
    gap: 8px;
  }

  .flow-arrow {
    display: none;
  }

  .flow-step {
    flex: 0 0 calc(33% - 8px);
  }

  .flow-pill {
    font-size: 13px;
    padding: 12px 20px;
  }

  .numbers-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 24px;
  }

  .paths-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 80px 0;
  }

  .hero {
    padding: 140px 0 80px;
  }

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

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

  .arch-box {
    padding: 16px 24px;
  }

  .arch-box-label {
    font-size: 14px;
  }

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

  .flow-step {
    flex: 0 0 100%;
  }

  .numbers-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cmd-desc {
    display: none;
  }
}