/* ===========================
   e-Web Board Landing Page
   Minimal, clean design
   =========================== */

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

:root {
  --color-text: #1a1a1a;
  --color-text-secondary: #555;
  --color-bg: #fff;
  --color-bg-alt: #f7f7f8;
  --color-border: #e0e0e0;
  --color-accent: #111;
  --color-accent-hover: #333;
  --font-sans: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --max-width: 960px;
  --radius: 6px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-nav {
  display: flex;
  gap: 24px;
}

.header-nav a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

.header-nav a:hover {
  color: var(--color-text);
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.hero-badge {
  display: inline-block;
  padding: 4px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
}

/* Sections */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  text-align: center;
}

.section-description {
  text-align: center;
  color: var(--color-text-secondary);
  margin-top: -32px;
  margin-bottom: 40px;
  font-size: 15px;
}

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

.feature-card {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  color: var(--color-text);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* Templates */
.template-item {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 64px;
}

.template-item:last-child {
  margin-bottom: 0;
}

.template-item-reverse {
  flex-direction: row-reverse;
}

.template-text {
  flex: 1;
}

.template-text h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.template-text p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.template-image {
  flex: 1.2;
}

.template-image img {
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

/* Tech Stack */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-badge {
  display: inline-block;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-secondary);
  background: var(--color-bg);
}

/* Quick Start */
.quickstart-steps {
  max-width: 640px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
}

.step:last-child {
  margin-bottom: 0;
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  margin-top: 2px;
}

.step-content {
  min-width: 0;
  overflow: hidden;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

pre {
  background: #1a1a1a;
  color: #e0e0e0;
  padding: 16px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  font-size: 13px;
  line-height: 1.6;
  font-family: var(--font-mono);
  white-space: pre;
  word-wrap: normal;
  max-width: 100%;
}

pre code {
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  display: block;
}

code {
  font-family: var(--font-mono);
  font-size: 13px;
}

p code {
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--color-border);
}

/* API */
.api-example {
  max-width: 640px;
  margin: 0 auto;
  overflow: hidden;
}

.api-example h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

/* CTA */
.cta {
  text-align: center;
  padding: 64px 0;
}

.cta h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  font-size: 15px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-inner {
  text-align: center;
}

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

.footer-inner a {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-license {
  margin-top: 4px;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 64px 0 56px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .template-item,
  .template-item-reverse {
    flex-direction: column;
    gap: 24px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 24px;
    margin-bottom: 32px;
  }

  .header-nav {
    gap: 16px;
  }

  .header-nav a {
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 240px;
    text-align: center;
  }
}