/* osbxl HP - Custom Styles */
/* Tailwind CDN handles most styling; this file adds project-specific overrides */

:root {
  --color-primary:   #2563EB;
  --color-accent:    #10B981;
  --color-cta:       #F59E0B;
  --color-surface:   #F8FAFC;
  --color-text:      #1E293B;
  --color-text-light:#64748B;
  --sidebar-width:   260px;
  --topbar-height:   64px;
}

/* Layout */
body {
  font-family: 'Inter', 'Hiragino Sans', 'Meiryo', sans-serif;
  color: var(--color-text);
  background-color: var(--color-surface);
  margin: 0;
  padding: 0;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  z-index: 100;
  background: white;
  border-bottom: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
}

.sidebar {
  position: fixed;
  top: var(--topbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: white;
  border-right: 1px solid #E2E8F0;
  overflow-y: auto;
  padding: 1.5rem 0;
  z-index: 90;
  transition: transform 0.3s ease;
}

.main-content {
  margin-top: var(--topbar-height);
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: calc(100vh - var(--topbar-height));
}

/* Mobile: sidebar hidden by default */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
  }
  .main-content {
    margin-left: 0;
  }
}

/* Sidebar menu */
.sidebar-menu-group {
  margin-bottom: 1.5rem;
}

.sidebar-menu-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  padding: 0 1.5rem;
  margin-bottom: 0.5rem;
}

.sidebar-menu-item {
  display: block;
  padding: 0.5rem 1.5rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s;
  border-left: 3px solid transparent;
}

.sidebar-menu-item:hover {
  background: var(--color-primary-50, #EFF6FF);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.sidebar-menu-item.active {
  background: var(--color-primary-50, #EFF6FF);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

/* CTA banner in sidebar */
.sidebar-cta {
  margin: 1.5rem 1rem;
  padding: 1rem;
  background: linear-gradient(135deg, var(--color-primary), #1D4ED8);
  border-radius: 0.75rem;
  color: white;
  text-align: center;
}

.sidebar-cta h4 {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.sidebar-cta p {
  font-size: 0.75rem;
  opacity: 0.9;
  margin-bottom: 0.75rem;
}

.sidebar-cta a {
  display: inline-block;
  background: var(--color-cta);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 0.375rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
}

.sidebar-cta a:hover {
  background: #D97706;
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
  margin-right: 1rem;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s, opacity 0.3s;
}

@media (max-width: 1023px) {
  .hamburger {
    display: flex;
  }
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 80;
}

.sidebar-overlay.active {
  display: block;
}

/* Buttons */
.btn-primary {
  background: var(--color-primary);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.15s;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: #1D4ED8;
}

.btn-cta {
  background: var(--color-cta);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.15s;
  border: none;
  cursor: pointer;
}

.btn-cta:hover {
  background: #D97706;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid var(--color-primary);
  transition: all 0.15s;
  cursor: pointer;
}

.btn-outline:hover {
  background: var(--color-primary);
  color: white;
}

/* Cards */
.card {
  background: white;
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  border: 1px solid #E2E8F0;
}

/* Hero section */
.hero {
  background: linear-gradient(135deg, #EFF6FF 0%, #ECFDF5 100%);
  border-radius: 1rem;
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.feature-card {
  background: white;
  border-radius: 0.75rem;
  padding: 1.5rem;
  border: 1px solid #E2E8F0;
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Form styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.375rem;
}

.form-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid #CBD5E1;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid #CBD5E1;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  background: white;
  box-sizing: border-box;
}

/* Logo */
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-accent);
}

/* Download platform cards */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.platform-card {
  background: white;
  border: 2px solid #E2E8F0;
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.platform-card:hover,
.platform-card.selected {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.platform-card .platform-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.platform-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.platform-card p {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* Testimonial */
.testimonial-card {
  background: white;
  border-radius: 0.75rem;
  padding: 1.5rem;
  border: 1px solid #E2E8F0;
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  font-size: 3rem;
  color: var(--color-primary-200, #BFDBFE);
  font-family: serif;
  line-height: 1;
}

.testimonial-text {
  padding-left: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.testimonial-author {
  padding-left: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-light);
  font-weight: 600;
}

/* API reference */
.api-nav {
  background: white;
  border: 1px solid #E2E8F0;
  border-radius: 0.5rem;
  padding: 1rem;
}

.api-category {
  margin-bottom: 0.75rem;
}

.api-category-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  margin-bottom: 0.375rem;
}

.api-func-link {
  display: block;
  padding: 0.25rem 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 0.25rem;
}

.api-func-link:hover {
  background: var(--color-primary-50, #EFF6FF);
  color: var(--color-primary);
}