/**
 * Seto Digital Theme - Core Styles & Design Tokens
 * Philosophy: Neo-Minimalist, Zero-Gradient, High-Contrast, Bento Architecture
 * Standards: Anti-AI-Slop, Strict 1px Borders, Pure Performance
 */

/* ==========================================================================
   1. Design Tokens
   ========================================================================== */
:root {
  /* Color Palette (PRD Section 2.2) */
  --bg-primary: #0A0A0A;
  --bg-surface: #121212;
  --bg-surface-elevated: #161616;
  --bg-elevated: #1E1E1E;
  --bg-hover: #222222;

  --border-default: #262626;
  --border-muted: #1F1F1F;
  --border-highlight: #FF5500;
  --border-focus: #FFFFFF;

  --accent-primary: #FF5500;
  --accent-hover: #E04B00;
  --accent-subtle: rgba(255, 85, 0, 0.12);
  --accent-solid-text: #FFFFFF;

  --text-primary: #FFFFFF;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  --text-inverse: #0A0A0A;

  --whatsapp-green: #25D366;
  --whatsapp-hover: #1EBE5D;
  --whatsapp-subtle: rgba(37, 211, 102, 0.12);

  --status-success: #22C55E;
  --status-warning: #EAB308;
  --status-error: #EF4444;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing Scale */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Structural Radii (Deliberate Violation: No rounded-2xl blobs) */
  --radius-none: 0px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 9999px;

  /* Layout Widths */
  --container-max: 1200px;
  --container-sm: 800px;
  --header-height: 72px;

  /* Transitions (Snappy & Mechanical, No sluggish duration-300 on everything) */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   2. Layout & Containers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-sm {
  width: 100%;
  max-width: var(--container-sm);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  border-bottom: 1px solid var(--border-default);
}

.section-sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-header {
  margin-bottom: var(--space-12);
}

.section-header.text-center {
  text-align: center;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: var(--space-3);
  padding: 0.25rem 0.625rem;
  background-color: var(--accent-subtle);
  border: 1px solid rgba(255, 85, 0, 0.25);
  border-radius: var(--radius-sm);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 640px;
}

.text-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   3. Buttons & Interactive Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

/* Safety Orange Primary Button (Zero-Gradient) */
.btn-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  border-color: var(--accent-primary);
}

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

/* Secondary Button */
.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover {
  background-color: var(--bg-elevated);
  border-color: #3F3F46;
  color: #FFFFFF;
}

/* High-Contrast Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-outline:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-primary);
}

/* High-Conversion WhatsApp Button */
.btn-whatsapp {
  background-color: var(--whatsapp-green);
  color: #FFFFFF;
  border-color: var(--whatsapp-green);
}

.btn-whatsapp:hover {
  background-color: var(--whatsapp-hover);
  border-color: var(--whatsapp-hover);
  color: #FFFFFF;
}

.btn-sm {
  font-size: 0.8125rem;
  padding: 0.5rem 0.875rem;
}

.btn-lg {
  font-size: 1rem;
  padding: 0.875rem 1.75rem;
}

.btn-block {
  width: 100%;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  line-height: 1;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
}

.badge-accent {
  background-color: var(--accent-subtle);
  border-color: rgba(255, 85, 0, 0.3);
  color: var(--accent-primary);
}

.badge-success {
  background-color: var(--whatsapp-subtle);
  border-color: rgba(37, 211, 102, 0.3);
  color: var(--whatsapp-green);
}

/* ==========================================================================
   4. Bento Grid Utilities
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
}

.bento-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.bento-card:hover {
  border-color: #3F3F46;
  background-color: var(--bg-surface-elevated);
}

.bento-card-featured {
  border-color: var(--border-highlight);
  background-color: #141110;
}

.bento-card-featured:hover {
  border-color: var(--accent-primary);
}

/* Column Spans */
.col-12 { grid-column: span 12; }
.col-8  { grid-column: span 8; }
.col-7  { grid-column: span 7; }
.col-6  { grid-column: span 6; }
.col-5  { grid-column: span 5; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }

@media (max-width: 991px) {
  .col-8, .col-7, .col-6, .col-5, .col-4, .col-3 {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .col-8, .col-7, .col-6, .col-5, .col-4, .col-3 {
    grid-column: span 12;
  }
  .bento-card {
    padding: var(--space-6);
  }
}

/* ==========================================================================
   5. Site Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-default);
  z-index: 1000;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header.scrolled {
  border-bottom-color: #333333;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.brand-dot {
  color: var(--accent-primary);
}

.header-nav {
  display: flex;
  align-items: center;
}

.primary-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
}

.primary-menu > li {
  position: relative;
}

.primary-menu a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.primary-menu a:hover,
.primary-menu .current-menu-item > a {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

.mobile-nav-toggle:hover {
  background-color: var(--bg-elevated);
}

.mobile-nav-toggle .icon-close {
  display: none;
}

.mobile-nav-toggle.is-active .icon-menu {
  display: none;
}

.mobile-nav-toggle.is-active .icon-close {
  display: inline-flex;
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-default);
  padding: var(--space-6);
  overflow-y: auto;
  z-index: 999;
}

.mobile-drawer.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.mobile-menu a:hover,
.mobile-menu .current-menu-item > a {
  color: var(--text-primary);
  background-color: var(--bg-surface);
  border-color: var(--border-default);
}

@media (max-width: 991px) {
  .header-nav {
    display: none;
  }
  .mobile-nav-toggle {
    display: inline-flex;
  }
  .header-actions .btn-whatsapp span.btn-label {
    display: none;
  }
}

/* ==========================================================================
   6. Site Footer (Semantic 4 Columns)
   ========================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-default);
  padding-top: var(--space-16);
  padding-bottom: var(--space-10);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.25fr 1.25fr 1.5fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-col-brand .brand-wrap {
  margin-bottom: var(--space-4);
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.footer-trust-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-trust-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 0.35rem 0.6rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
}

.footer-heading {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  margin-bottom: var(--space-5);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: 0;
  margin: 0;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: translateX(2px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.footer-contact-item svg {
  margin-top: 3px;
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.footer-legal-links a {
  color: var(--text-muted);
}

.footer-legal-links a:hover {
  color: var(--text-primary);
}

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 580px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   7. Floating WhatsApp Widget
   ========================================================================== */
.floating-whatsapp {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background-color: var(--whatsapp-green);
  color: #FFFFFF;
  padding: 0.75rem 1.125rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 990;
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.floating-whatsapp:hover {
  background-color: var(--whatsapp-hover);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.floating-whatsapp .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #FFFFFF;
  border-radius: 50%;
  animation: wa-pulse 1.8s infinite;
}

@keyframes wa-pulse {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.5; }
  100% { transform: scale(0.95); opacity: 1; }
}

@media (max-width: 640px) {
  .floating-whatsapp span.wa-text {
    display: none;
  }
  .floating-whatsapp {
    padding: 0.875rem;
    border-radius: 50%;
  }
}

/* ==========================================================================
   8. Blog & Article Content Styling
   ========================================================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 991px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

.post-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.post-card:hover {
  border-color: #3F3F46;
  transform: translateY(-2px);
}

.post-card-thumb {
  width: 100%;
  height: 200px;
  background-color: var(--bg-surface-elevated);
  overflow: hidden;
  border-bottom: 1px solid var(--border-default);
}

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.post-card:hover .post-card-thumb img {
  transform: scale(1.03);
}

.post-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1 0 auto;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.post-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.post-card-title a:hover {
  color: var(--accent-primary);
}

.post-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-5);
  flex-grow: 1;
}

.post-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-primary);
}

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

/* Single Post Layout */
.article-header {
  margin-bottom: var(--space-10);
  border-bottom: 1px solid var(--border-default);
  padding-bottom: var(--space-8);
}

.article-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-top: var(--space-4);
  margin-bottom: var(--space-4);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.article-featured-image {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-10);
}

.entry-content {
  font-size: 1.125rem;
  line-height: 1.75;
  color: #D4D4D8;
}

.entry-content p {
  margin-bottom: var(--space-6);
}

.entry-content h2 {
  font-size: 1.75rem;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

.entry-content h3 {
  font-size: 1.375rem;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.entry-content ul,
.entry-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.entry-content ul {
  list-style: square;
}

.entry-content ol {
  list-style: decimal;
}

.entry-content li {
  margin-bottom: var(--space-2);
}

.entry-content blockquote {
  border-left: 3px solid var(--accent-primary);
  background-color: var(--bg-surface);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-8) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-primary);
}

.entry-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--bg-surface-elevated);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  color: #F97316;
}

/* In-Article CTA Banner */
.article-cta-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  margin: var(--space-12) 0;
  text-align: center;
}

.article-cta-box h3 {
  color: var(--text-primary);
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.article-cta-box p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   9. Pagination
   ========================================================================== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}

.pagination .nav-links {
  display: flex;
  gap: var(--space-2);
}

.pagination a,
.pagination .current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-default);
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

.pagination .current,
.pagination a:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #FFFFFF;
}

/* ==========================================================================
   10. 404 Error Template
   ========================================================================== */
.error-404-wrap {
  text-align: center;
  padding: var(--space-24) 0;
}

.error-code {
  font-family: var(--font-mono);
  font-size: clamp(5rem, 12vw, 9rem);
  font-weight: 900;
  line-height: 1;
  color: var(--accent-primary);
  letter-spacing: -0.05em;
  margin-bottom: var(--space-4);
}

.error-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.error-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-8);
}

.error-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}