/* ================================================================
   ARDS Responsive Website — Stylesheet
   Light theme (default) + automatic dark mode via prefers-color-scheme
   ================================================================ */

/* ---------- Design tokens : LIGHT (default) ---------- */
:root {
  --color-primary: #0284c7;
  --color-primary-dark: #0369a1;
  --color-secondary: #0d9488;
  --color-accent: #8b5cf6;

  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-surface-raised: #ffffff;
  --color-border: #e2e8f0;

  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-soft: #64748b;

  --color-primary-soft: rgba(2, 132, 199, 0.10);
  --color-success: #059669;
  --color-danger: #e11d48;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition-fast: 0.18s ease;
  --transition-base: 0.28s ease;
  --transition-slow: 0.5s cubic-bezier(0.22, 1, 0.36, 1);

  --container-max: 1200px;
  --header-h: 72px;
}

/* ---------- Automatic DARK mode ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b1220;
    --color-surface: #101a2c;
    --color-surface-raised: #16233a;
    --color-border: #26344d;
    --color-text: #f1f5f9;
    --color-text-muted: #a9b7ca;
    --color-text-soft: #8ea0b8;
    --color-primary-soft: rgba(56, 189, 248, 0.12);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.55);
  }
}

/* Manual override hook (html[data-theme="dark"]) */
html[data-theme='dark'] {
  --color-bg: #0b1220;
  --color-surface: #101a2c;
  --color-surface-raised: #16233a;
  --color-border: #26344d;
  --color-text: #f1f5f9;
  --color-text-muted: #a9b7ca;
  --color-text-soft: #8ea0b8;
  --color-primary-soft: rgba(56, 189, 248, 0.12);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; color: var(--color-text); }

::selection { background: var(--color-primary); color: #ffffff; }

/* ---------- Typography ---------- */
.heading-xl { font-size: clamp(2.4rem, 5.5vw, 3.8rem); font-weight: 800; line-height: 1.12; letter-spacing: -0.025em; }
.heading-lg { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; line-height: 1.18; letter-spacing: -0.02em; }
.heading-md { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; line-height: 1.25; }
.heading-sm { font-size: 1.25rem; font-weight: 700; line-height: 1.35; }
.text-lg { font-size: 1.15rem; }
.text-md { font-size: 1rem; }
.text-sm { font-size: 0.875rem; }
.text-muted { color: var(--color-text-muted); }
.gradient-text {
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-md);
  font-size: 0.95rem; font-weight: 600; line-height: 1;
  transition: all var(--transition-fast); white-space: nowrap;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary { background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); color: #ffffff; box-shadow: var(--shadow-md); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); color: #ffffff; }
.btn-secondary { background: var(--color-surface-raised); color: var(--color-text); border: 1px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-lg { padding: 15px 30px; font-size: 1rem; }
.btn-xl { padding: 17px 36px; font-size: 1.05rem; border-radius: var(--radius-lg); }
.btn-full { width: 100%; }
.btn:focus-visible { outline: 3px solid var(--color-primary-soft); outline-offset: 2px; }

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }

.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; color: var(--color-text); }
.logo:hover { color: var(--color-text); }
.logo-icon {
  width: 38px; height: 38px; border-radius: 11px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: grid; place-items: center; box-shadow: var(--shadow-md);
}
.logo-icon svg { width: 24px; height: 24px; }
.logo-text span { color: var(--color-primary); }

/* Desktop nav */
.nav-desktop { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 9px 14px; border-radius: var(--radius-sm);
  color: var(--color-text-muted); font-weight: 600; font-size: 0.93rem;
}
.nav-link:hover { color: var(--color-text); background: var(--color-surface); }
.nav-link.active { color: var(--color-primary); background: var(--color-primary-soft); }

.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px; border-radius: var(--radius-sm);
  color: var(--color-text-muted); font-weight: 600; font-size: 0.93rem;
  transition: all var(--transition-fast);
}
.nav-dropdown-toggle:hover { color: var(--color-text); background: var(--color-surface); }
.nav-dropdown-toggle .chevron { width: 15px; height: 15px; transition: transform var(--transition-fast); }
.nav-dropdown:hover .chevron, .nav-dropdown:focus-within .chevron, .nav-dropdown.active .chevron { transform: rotate(180deg); }

.nav-dropdown-menu {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 250px;
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all var(--transition-fast);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.active .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-menu a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--color-text-muted); font-size: 0.9rem; font-weight: 500;
}
.nav-dropdown-menu a:hover { background: var(--color-surface); color: var(--color-primary); }
.nav-dropdown-menu .icon { width: 17px; height: 17px; flex-shrink: 0; }

.header-actions { display: flex; align-items: center; gap: 12px; }

/* Hamburger (hidden on desktop) */
.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 42px; height: 42px; padding: 9px; border-radius: var(--radius-sm); }
.hamburger span { display: block; height: 2.5px; width: 100%; border-radius: 2px; background: var(--color-text); transition: all var(--transition-fast); }
.hamburger:hover { background: var(--color-surface); }
.hamburger.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Mobile menu (hidden on desktop) */
.mobile-menu {
  position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; z-index: 999;
  background: var(--color-bg);
  padding: 16px 24px 32px; overflow-y: auto;
  transform: translateX(100%); visibility: hidden;
  transition: transform var(--transition-base), visibility var(--transition-base);
}
.mobile-menu.open { transform: translateX(0); visibility: visible; }
.mobile-nav-link {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 12px; font-size: 1.05rem; font-weight: 600;
  color: var(--color-text); border-bottom: 1px solid var(--color-border);
}
.mobile-nav-link .icon { width: 20px; height: 20px; color: var(--color-primary); }
.mobile-nav-link:active, .mobile-nav-link.active { color: var(--color-primary); }
.mobile-menu-actions { margin-top: 28px; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: calc(var(--header-h) + 72px) 0 96px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg-gradient {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--color-primary-soft) 0%, transparent 55%);
}
.hero-grid-pattern {
  position: absolute; inset: 0; opacity: 0.5;
  background-image: linear-gradient(var(--color-border) 1px, transparent 1px), linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 75%);
}
.hero-orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.35; animation: orbFloat 9s ease-in-out infinite; }
.hero-orb-1 { width: 320px; height: 320px; background: var(--color-primary); top: -80px; right: 8%; }
.hero-orb-2 { width: 260px; height: 260px; background: var(--color-secondary); bottom: 6%; left: 4%; animation-delay: -3s; }
.hero-orb-3 { width: 200px; height: 200px; background: var(--color-accent); top: 38%; right: 32%; animation-delay: -6s; opacity: 0.22; }
@keyframes orbFloat { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-26px) scale(1.06); } }

.hero-content { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: var(--radius-full);
  background: var(--color-primary-soft); color: var(--color-primary);
  font-size: 0.83rem; font-weight: 700; letter-spacing: 0.02em;
  margin-bottom: 22px; border: 1px solid var(--color-primary-soft);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-primary); animation: pulseDot 2s infinite; }
@keyframes pulseDot { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(0.8); } }
.hero-title { margin-bottom: 22px; }
.hero-description { font-size: 1.13rem; color: var(--color-text-muted); max-width: 540px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-card-main {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: 28px; box-shadow: var(--shadow-lg);
}
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 22px; }
.hero-stat {
  text-align: center; padding: 16px 8px; border-radius: var(--radius-md);
  background: var(--color-surface); border: 1px solid var(--color-border);
}
.hero-stat-value { font-size: 1.65rem; font-weight: 800; color: var(--color-primary); line-height: 1.1; }
.hero-stat-label { font-size: 0.78rem; font-weight: 600; color: var(--color-text-soft); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 4px; }
.hero-chart-placeholder {
  height: 150px; border-radius: var(--radius-md);
  background: var(--color-surface); border: 1px solid var(--color-border);
  display: grid; place-items: center;
}
.hero-chart-placeholder svg { width: 54px; height: 54px; opacity: 0.6; }
.hero-float-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 8px; }
.hero-float-icon svg { width: 22px; height: 22px; }
.hero-float-card {
  position: absolute; z-index: 2;
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 14px 16px; box-shadow: var(--shadow-lg);
  animation: floatCard 5s ease-in-out infinite;
}
.hero-float-card-1 { top: 12%; right: -18px; }
.hero-float-card-2 { bottom: -22px; left: -14px; animation-delay: -2.5s; }
@keyframes floatCard { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.hero-float-text { font-size: 0.88rem; font-weight: 700; color: var(--color-text); }
.hero-float-sub { font-size: 0.75rem; color: var(--color-text-soft); }
.hero-visual { position: relative; }

/* ---------- Highlights ---------- */
.highlights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.highlight-card {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 32px 28px; box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}
.highlight-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-primary-soft); }
.highlight-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--color-text); }
.highlight-card p { font-size: 0.93rem; color: var(--color-text-muted); }
.highlight-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 20px; }
.highlight-icon svg { width: 26px; height: 26px; }

/* ---------- CTA ---------- */
.cta-section { padding: 72px 0; }
.cta-inner {
  position: relative; overflow: hidden; border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #0369a1, #0d9488);
  padding: 72px 48px; text-align: center;
}
.cta-inner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(255,255,255,0.14), transparent 45%), radial-gradient(circle at 85% 80%, rgba(255,255,255,0.1), transparent 40%);
}
.cta-content { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-title { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 800; color: #ffffff; margin-bottom: 14px; }
.cta-text { font-size: 1.05rem; color: rgba(255,255,255,0.88); margin-bottom: 32px; }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }

/* ---------- Inner page hero (About / Services / Blog / Contact) ---------- */
.about-hero {
  padding: calc(var(--header-h) + 64px) 0 56px;
  background: linear-gradient(180deg, var(--color-primary-soft), transparent);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}
.about-hero .heading-lg { margin-bottom: 14px; }
.about-hero .text-lg { color: var(--color-text-muted); max-width: 640px; margin: 0 auto; }

/* ---------- Mission ---------- */
.mission-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }
.mission-visual {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-xl); padding: 8px; box-shadow: var(--shadow-lg);
}
.mission-visual-inner {
  background: var(--color-surface-raised); border-radius: calc(var(--radius-xl) - 8px);
  padding: 56px 36px; text-align: center;
}
.mission-visual-inner svg { width: 72px; height: 72px; margin: 0 auto 20px; color: var(--color-primary); }
.mission-visual-inner h3 { font-size: 1.3rem; font-weight: 700; color: var(--color-text); }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 28px 20px; text-align: center; box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}
.team-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.team-avatar {
  width: 76px; height: 76px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff; display: grid; place-items: center;
  font-size: 1.35rem; font-weight: 800; letter-spacing: 0.02em;
}
.team-name { font-size: 1.02rem; font-weight: 700; color: var(--color-text); }
.team-role { font-size: 0.82rem; font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.05em; margin: 4px 0 12px; }
.team-bio { font-size: 0.86rem; color: var(--color-text-muted); line-height: 1.55; }

/* ---------- Values ---------- */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.value-card {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 32px 28px; box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.value-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px; }
.value-icon svg { width: 26px; height: 26px; }
.value-card p { font-size: 0.93rem; color: var(--color-text-muted); }

/* ---------- Features (Services) ---------- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 32px 28px; box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex; flex-direction: column;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-primary-soft); }
.feature-icon-wrap { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 20px; }
.feature-icon-wrap svg { width: 27px; height: 27px; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--color-text); }
.feature-card p { font-size: 0.93rem; color: var(--color-text-muted); margin-bottom: 18px; flex-grow: 1; }
.feature-link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.9rem; font-weight: 700; color: var(--color-primary); }
.feature-link svg { width: 15px; height: 15px; transition: transform var(--transition-fast); }
.feature-link:hover svg { transform: translateX(4px); }

/* ---------- Blog ---------- */
.blog-layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.blog-card {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: all var(--transition-base); display: flex; flex-direction: column;
}
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.blog-thumb {
  position: relative; height: 170px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: grid; place-items: center;
}
.blog-thumb svg { width: 56px; height: 56px; color: rgba(255,255,255,0.85); }
.blog-category {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 12px; border-radius: var(--radius-full);
  background: rgba(255,255,255,0.92); color: #0369a1;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
}
.blog-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex-grow: 1; }
.blog-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 12px; }
.blog-meta span { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 600; color: var(--color-text-soft); }
.blog-meta svg { width: 14px; height: 14px; }
.blog-body h3 { font-size: 1.08rem; font-weight: 700; line-height: 1.4; color: var(--color-text); margin-bottom: 10px; }
.blog-body > p { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 18px; flex-grow: 1; }
.blog-read-more { display: inline-flex; align-items: center; gap: 6px; font-size: 0.88rem; font-weight: 700; color: var(--color-primary); margin-top: auto; }
.blog-read-more:hover { gap: 9px; }

/* ---------- Blog sidebar ---------- */
.sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: calc(var(--header-h) + 24px); }
.sidebar-widget {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm);
}
.sidebar-widget h4 { font-size: 0.95rem; font-weight: 700; color: var(--color-text); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }
.sidebar-search { display: flex; gap: 8px; }
.sidebar-search input {
  flex: 1; min-width: 0; padding: 10px 14px;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-bg); font-size: 0.88rem;
  transition: border-color var(--transition-fast);
}
.sidebar-search input:focus { outline: none; border-color: var(--color-primary); }
.sidebar-search button {
  width: 42px; flex-shrink: 0; border-radius: var(--radius-sm);
  background: var(--color-primary); color: #ffffff; display: grid; place-items: center;
  transition: background var(--transition-fast);
}
.sidebar-search button:hover { background: var(--color-primary-dark); }
.sidebar-categories { display: flex; flex-direction: column; gap: 4px; }
.sidebar-categories a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 10px; border-radius: var(--radius-sm);
  color: var(--color-text-muted); font-size: 0.9rem; font-weight: 600;
}
.sidebar-categories a:hover { background: var(--color-surface); color: var(--color-primary); }
.sidebar-categories a span {
  min-width: 26px; text-align: center; padding: 1px 8px;
  border-radius: var(--radius-full); background: var(--color-primary-soft);
  color: var(--color-primary); font-size: 0.75rem; font-weight: 700;
}
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.sidebar-tags a {
  padding: 6px 13px; border-radius: var(--radius-full);
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-text-muted); font-size: 0.8rem; font-weight: 600;
}
.sidebar-tags a:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-info-card {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow-sm);
}
.contact-info-icon {
  width: 46px; height: 46px; flex-shrink: 0; border-radius: 13px;
  background: var(--color-primary-soft); color: var(--color-primary);
  display: grid; place-items: center;
}
.contact-info-icon svg { width: 22px; height: 22px; }
.contact-info-text h4 { font-size: 0.98rem; font-weight: 700; color: var(--color-text); margin-bottom: 4px; }
.contact-info-text p { font-size: 0.88rem; color: var(--color-text-muted); line-height: 1.55; }
.social-links { display: flex; gap: 10px; }
.social-link {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-text-muted); display: grid; place-items: center;
}
.social-link svg { width: 17px; height: 17px; }
.social-link:hover { background: var(--color-primary); border-color: var(--color-primary); color: #ffffff; transform: translateY(-2px); }
.map-container { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border); }
.map-placeholder {
  height: 220px; display: grid; place-items: center; text-align: center;
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-surface));
  color: var(--color-text-muted);
}
.map-placeholder svg { width: 44px; height: 44px; margin: 0 auto 10px; color: var(--color-primary); }

/* ---------- Forms ---------- */
.contact-form {
  background: var(--color-surface-raised); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: 36px 32px; box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--color-text); margin-bottom: 7px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 12px 16px;
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-bg); font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-textarea { min-height: 140px; resize: vertical; }
.form-select { cursor: pointer; }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--color-text-soft); }

.form-status { padding: 13px 16px; border-radius: var(--radius-md); font-size: 0.88rem; font-weight: 600; margin-bottom: 18px; }
.form-status-success { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.35); color: var(--color-success); }
.form-status-error { background: rgba(244,63,94,0.1); border: 1px solid rgba(244,63,94,0.35); color: var(--color-danger); }

/* ---------- Footer ---------- */
.footer { background: #0b1220; color: #cbd5e1; padding: 72px 0 0; margin-top: 40px; }
html[data-theme='dark'] .footer { border-top: 1px solid var(--color-border); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 56px; }
.footer-brand .logo { color: #ffffff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.65; color: #94a3b8; }
.footer-brand input::placeholder { color: #64748b; }
.footer-brand form input:focus { outline: none; border-color: var(--color-primary); }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: #ffffff; margin-bottom: 18px; }
.footer-col a { display: block; padding: 6px 0; color: #94a3b8; font-size: 0.9rem; }
.footer-col a:hover { color: #ffffff; transform: translateX(3px); }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px;
  padding: 24px 0; border-top: 1px solid #1e293b;
}
.footer-bottom p { font-size: 0.83rem; color: #64748b; }
.footer-bottom-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-bottom-links a { font-size: 0.83rem; color: #94a3b8; }
.footer-bottom-links a:hover { color: #ffffff; }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; bottom: 26px; right: 26px; z-index: 900;
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff; display: grid; place-items: center; box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: all var(--transition-base);
}
.back-to-top svg { width: 20px; height: 20px; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-orb, .hero-float-card { animation: none; }
}

/* ================================================================
   RESPONSIVE — Tablet (<= 1024px)
   ================================================================ */
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .hero-content { gap: 40px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid, .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .blog-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-widget { flex: 1 1 260px; }
  
  /* Improved header for tablet */
  .header-inner { padding: 0 20px; }
  .nav-desktop { gap: 2px; }
  .nav-link { padding: 8px 10px; font-size: 0.88rem; }
  .nav-dropdown-toggle { padding: 8px 10px; font-size: 0.88rem; }
}

/* ================================================================
   RESPONSIVE — Mobile (<= 768px)
   ================================================================ */
@media (max-width: 768px) {
  /* Header & Navigation */
  .nav-desktop, .header-actions .btn { display: none; }
  .hamburger { display: flex; }
  .header-inner { padding: 0 16px; gap: 12px; }
  .logo { font-size: 1.15rem; }
  .logo-icon { width: 34px; height: 34px; }
  
  /* Mobile Menu */
  .mobile-menu {
    padding: 12px 16px 24px;
    transform: translateX(100%);
  }
  .mobile-nav-link {
    padding: 14px 10px;
    font-size: 1rem;
    min-height: 50px;
  }
  .mobile-menu-actions { margin-top: 20px; }
  
  /* Container & Spacing */
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .section-sm { padding: 36px 0; }
  
  /* Hero Section */
  .hero { padding: calc(var(--header-h) + 32px) 0 56px; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-badge { font-size: 0.75rem; padding: 6px 12px; margin-bottom: 16px; }
  .hero-title { margin-bottom: 16px; }
  .hero-description { font-size: 1rem; margin-bottom: 24px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  
  /* Hero Cards */
  .hero-card-main { padding: 20px; }
  .hero-stats { grid-template-columns: 1fr; gap: 10px; margin-bottom: 16px; }
  .hero-stat { padding: 12px; }
  .hero-stat-value { font-size: 1.4rem; }
  .hero-chart-placeholder { height: 120px; }
  .hero-float-card-1 { right: 8px; top: -12px; padding: 12px; }
  .hero-float-card-2 { left: 8px; bottom: -12px; padding: 12px; }
  .hero-float-icon { width: 36px; height: 36px; }
  
  /* Grid Layouts */
  .highlights-grid, .features-grid, .values-grid { grid-template-columns: 1fr; gap: 20px; }
  .team-grid { grid-template-columns: 1fr; gap: 20px; }
  .mission-layout { grid-template-columns: 1fr; gap: 32px; }
  .blog-grid { grid-template-columns: 1fr; gap: 20px; }
  .contact-layout { grid-template-columns: 1fr; gap: 24px; }
  
  /* Cards */
  .highlight-card, .feature-card, .value-card { padding: 24px 20px; }
  .highlight-icon, .value-icon, .feature-icon-wrap { width: 48px; height: 48px; margin-bottom: 16px; }
  .highlight-icon svg, .value-icon svg, .feature-icon-wrap svg { width: 24px; height: 24px; }
  
  /* CTA Section */
  .cta-inner { padding: 40px 20px; }
  .cta-title { font-size: 1.5rem; }
  .cta-text { font-size: 0.95rem; margin-bottom: 24px; }
  .cta-actions { flex-direction: column; gap: 12px; }
  .cta-actions .btn { width: 100%; }
  
  /* Forms */
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 24px 18px; }
  .form-group { margin-bottom: 16px; }
  .form-input, .form-select, .form-textarea { padding: 10px 14px; font-size: 0.9rem; }
  
  /* About Page */
  .about-hero { padding: calc(var(--header-h) + 40px) 0 40px; }
  .about-hero .heading-lg { font-size: 1.75rem; }
  .about-hero .text-lg { font-size: 1rem; }
  .mission-visual-inner { padding: 40px 24px; }
  .mission-visual-inner svg { width: 56px; height: 56px; }
  
  /* Team Cards */
  .team-card { padding: 24px 18px; }
  .team-avatar { width: 64px; height: 64px; font-size: 1.2rem; }
  
  /* Blog */
  .blog-layout { grid-template-columns: 1fr; gap: 24px; }
  .sidebar { position: static; flex-direction: column; }
  .sidebar-widget { width: 100%; }
  .blog-thumb { height: 140px; }
  .blog-body { padding: 18px 20px 22px; }
  
  /* Contact */
  .contact-info-card { padding: 18px; }
  .contact-info-icon { width: 40px; height: 40px; }
  .map-placeholder { height: 180px; }
  
  /* Footer */
  .footer { padding: 48px 0 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-brand form { max-width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 16px; }
  .footer-bottom-links { justify-content: center; }
  
  /* Touch-friendly buttons */
  .btn { min-height: 44px; }
  .btn-sm { min-height: 38px; }
  
  /* Typography */
  .heading-lg { font-size: 1.6rem; }
  .heading-xl { font-size: 1.9rem; }
  
  /* Ensure no horizontal overflow */
  * { max-width: 100%; }
  
  /* Better spacing */
  .highlight-card, .feature-card, .blog-card, .team-card { margin-bottom: 0; }
}

/* ---------- Small phones (<= 420px) ---------- */
@media (max-width: 420px) {
  /* Container */
  .container { padding: 0 14px; }
  
  /* Header */
  .header-inner { padding: 0 12px; }
  .logo { font-size: 1.05rem; }
  .logo-icon { width: 32px; height: 32px; }
  .hamburger { width: 38px; height: 38px; }
  
  /* Hero */
  .hero { padding: calc(var(--header-h) + 28px) 0 48px; }
  .hero-title { font-size: 1.7rem; }
  .hero-description { font-size: 0.95rem; }
  .hero-card-main { padding: 16px; }
  .hero-stats { grid-template-columns: 1fr; gap: 8px; }
  .hero-stat { padding: 10px; }
  .hero-stat-value { font-size: 1.3rem; }
  .hero-chart-placeholder { height: 100px; }
  
  /* Cards */
  .highlight-card, .feature-card, .value-card { padding: 20px 16px; }
  .highlight-icon, .value-icon, .feature-icon-wrap { width: 44px; height: 44px; }
  
  /* Buttons */
  .btn-xl { width: 100%; padding: 14px 24px; }
  .btn-lg { width: 100%; padding: 12px 24px; }
  
  /* Forms */
  .contact-form { padding: 20px 16px; }
  
  /* CTA */
  .cta-inner { padding: 32px 16px; }
  .cta-title { font-size: 1.4rem; }
  
  /* Footer */
  .footer { padding: 40px 0 0; }
  .footer-grid { gap: 20px; }
  
  /* Typography */
  .heading-lg { font-size: 1.45rem; }
  .heading-xl { font-size: 1.7rem; }
  .heading-md { font-size: 1.3rem; }
}

/* ---------- Very small phones (<= 360px) ---------- */
@media (max-width: 360px) {
  /* Container */
  .container { padding: 0 12px; }
  
  /* Header */
  .logo { font-size: 1rem; }
  .logo-icon { width: 30px; height: 30px; }
  
  /* Hero */
  .hero-title { font-size: 1.5rem; }
  .hero-description { font-size: 0.9rem; }
  
  /* Cards */
  .highlight-card, .feature-card, .value-card { padding: 18px 14px; }
  
  /* Typography */
  .heading-lg { font-size: 1.35rem; }
  .heading-xl { font-size: 1.55rem; }
  .heading-md { font-size: 1.2rem; }
  
  /* Mobile menu */
  .mobile-nav-link { padding: 12px 8px; font-size: 0.95rem; }
}