/* ==========================================================================
   LAMBORATORY MODERN DESIGN SYSTEM
   Ultra-fast, responsive, accessible, dark/light theme, glassmorphic UI
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Color Tokens - Light Mode */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-glass: rgba(255, 255, 255, 0.85);
  --bg-elevated: #f1f5f9;
  --bg-subtle: #e2e8f0;
  --border-subtle: rgba(148, 163, 184, 0.25);
  --border-focus: #0ea5e9;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  /* Lamboratory Accent Palette */
  --accent-red: #ef4444;
  --accent-blue: #0ea5e9;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;

  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-glow: rgba(14, 165, 233, 0.25);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.1), 0 6px 12px -3px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.2);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container-max: 1160px;
}

[data-theme="dark"] {
  /* Color Tokens - Dark Mode */
  --bg-body: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-glass: rgba(15, 23, 42, 0.85);
  --bg-elevated: #1e293b;
  --bg-subtle: #273549;
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-focus: #38bdf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --primary: #38bdf8;
  --primary-hover: #7dd3fc;
  --primary-glow: rgba(56, 189, 248, 0.35);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 32px -4px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

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

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

/* Iconic Lamboratory Letter-Block Logo */
.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 0.75rem;
}

.logo-grid {
  display: inline-flex;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background-color: var(--bg-surface);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-link:hover .logo-grid {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.logo-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.55rem;
  height: 1.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: -0.02em;
  border-right: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  user-select: none;
}

.logo-letter:last-child {
  border-right: none;
}

/* Color patterns matching legacy Lambtheme with modern neon punch */
.logo-letter.c-red {
  color: var(--accent-red);
  background: rgba(239, 68, 68, 0.08);
}
.logo-letter.c-blue {
  color: var(--accent-blue);
  background: rgba(14, 165, 233, 0.08);
}
.logo-letter.c-green {
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.08);
}

.brand-link:hover .logo-letter.c-red {
  background: rgba(239, 68, 68, 0.22);
}
.brand-link:hover .logo-letter.c-blue {
  background: rgba(14, 165, 233, 0.22);
}
.brand-link:hover .logo-letter.c-green {
  background: rgba(16, 185, 129, 0.22);
}

/* Main Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.9rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
  background-color: var(--bg-elevated);
}

.nav-link.active {
  color: var(--primary);
}

/* Theme Switcher Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-muted);
  cursor: pointer;
  margin-left: 0.5rem;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-main);
  background: var(--bg-elevated);
  border-color: var(--border-focus);
}

.theme-icon-light,
.theme-icon-dark {
  width: 1.15rem;
  height: 1.15rem;
  stroke: currentColor;
}

[data-theme="dark"] .theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: block; }
[data-theme="light"] .theme-icon-dark { display: block; }
[data-theme="light"] .theme-icon-light { display: none; }

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
}

/* ==========================================================================
   HERO / BANNER SECTION
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 2rem;
  background: radial-gradient(circle at 10% 20%, rgba(14, 165, 233, 0.07) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.05) 0%, transparent 40%);
}

.hero-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-blue), var(--accent-green));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 48rem;
  margin-bottom: 1.75rem;
  line-height: 1.7;
}

.hero-description a {
  font-weight: 600;
  color: var(--text-main);
  border-bottom: 1.5px dotted var(--primary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(14, 165, 233, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background: var(--bg-elevated);
  color: var(--text-main);
  border-color: var(--border-focus);
}

/* ==========================================================================
   FEATURED PROJECTS SLIDER / CAROUSEL
   ========================================================================== */
.slider-section {
  padding: 2rem 0 3rem;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
}

.section-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.featured-slider {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.slider-track-container {
  overflow: hidden;
  position: relative;
  width: 100%;
}

.slider-track {
  display: flex;
  transition: transform var(--transition-normal);
  will-change: transform;
}

.slider-slide {
  min-width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2.5rem;
  padding: 2.5rem;
}

.slide-image-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-elevated);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
}

.slide-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.slider-slide:hover .slide-image-wrapper img {
  transform: scale(1.03);
}

.slide-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.slide-tag {
  align-self: flex-start;
  padding: 0.25rem 0.65rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.slide-title {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
}

.slide-title a {
  color: var(--text-main);
}

.slide-title a:hover {
  color: var(--primary);
}

.slide-excerpt {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.6;
}

/* Slider Controls */
.slider-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
}

.slider-dots {
  display: flex;
  gap: 0.5rem;
}

.dot-btn {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: var(--radius-full);
  background: var(--text-subtle);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
}

.dot-btn.active {
  background: var(--primary);
  width: 1.75rem;
}

.slider-nav-btns {
  display: flex;
  gap: 0.5rem;
}

.nav-arrow-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* ==========================================================================
   PROJECTS GRID & CARDS
   ========================================================================== */
.projects-section {
  padding: 2rem 0 3.5rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.filter-btn {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-main);
  border-color: var(--primary);
}

.filter-btn.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

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

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.project-card-image {
  aspect-ratio: 16 / 10;
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.project-card:hover .project-card-image img {
  transform: scale(1.05);
}

.project-card-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.2rem 0.6rem;
  background: rgba(15, 23, 42, 0.8);
  color: #fff;
  backdrop-filter: blur(4px);
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.project-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 0.75rem;
}

.project-card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.project-card-title a {
  color: var(--text-main);
}

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

.project-card-excerpt {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
  flex-grow: 1;
}

.project-card-footer {
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.project-card-link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   BLOG POSTS LISTING & CARDS
   ========================================================================== */
.blog-section {
  padding: 2.5rem 0 4rem;
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all var(--transition-fast);
}

.post-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.post-date {
  font-weight: 500;
}

.post-card-title {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.3;
}

.post-card-title a {
  color: var(--text-main);
}

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

.post-card-excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.category-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.category-tag:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ==========================================================================
   ARTICLE / DETAIL PAGE (POSTS & PROJECTS)
   ========================================================================== */
.article-container {
  max-width: 820px;
  margin: 2.5rem auto 4.5rem;
  padding: 0 1.5rem;
}

.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.article-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-content {
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content img {
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-subtle);
}

.article-content pre {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin: 1.5rem 0;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-elevated);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
}

.article-content blockquote {
  border-left: 3px solid var(--primary);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-style: italic;
}

/* Reactions Bar */
.reactions-bar {
  margin-top: 3.5rem;
  padding: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.reactions-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-muted);
}

.reaction-buttons {
  display: flex;
  gap: 0.75rem;
}

.reaction-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.reaction-btn:hover {
  transform: scale(1.06);
  border-color: var(--primary);
  background: rgba(14, 165, 233, 0.1);
}

.reaction-btn.reacted {
  background: rgba(14, 165, 233, 0.2);
  border-color: var(--primary);
  color: var(--primary);
}

/* ==========================================================================
   CONTACT FORM & PAGE
   ========================================================================== */
.contact-container {
  max-width: 680px;
  margin: 3rem auto 5rem;
  padding: 0 1.5rem;
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-surface);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* Honeypot field */
.form-hp {
  display: none !important;
}

.form-status {
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid #10b981;
}

.form-status.error {
  display: block;
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid #ef4444;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  text-align: center;
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  color: var(--text-muted);
  font-weight: 500;
}

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

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 840px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .slider-slide {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1.75rem;
  }

  .slider-controls {
    padding: 1rem 1.75rem;
  }

  .article-title {
    font-size: 2rem;
  }

  .mobile-menu-btn {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.5rem;
    flex-direction: column;
    align-items: stretch;
    box-shadow: var(--shadow-lg);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-link {
    padding: 0.75rem 1rem;
  }

  .theme-toggle-btn {
    align-self: flex-start;
    margin-top: 0.5rem;
    margin-left: 0;
  }
}