/* ==========================================================================
   kutomoto.com — Official Web Landing Page Stylesheet
   Professional Forms Filling Automation System for Windows OS
   Copyrights reserved to 90Studio
   ========================================================================== */

:root {
  --bg-dark: #070b14;
  --bg-hero: #0b1120;
  --bg-card-dark: #111827;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --primary: #1f6feb;
  --primary-hover: #1158c7;
  --primary-soft: rgba(31, 111, 235, 0.12);
  --primary-glow: rgba(31, 111, 235, 0.35);
  --accent: #10b981;
  --accent-hover: #059669;
  --accent-soft: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  --text-light-muted: #94a3b8;
  --border-light: #e2e8f0;
  --border-dark: #1e293b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 20px 40px rgba(7, 11, 20, 0.25);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-light);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ==========================================================================
   1. STICKY NAVIGATION BAR
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.25s ease;
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--text-light);
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #1f6feb 0%, #3b82f6 100%);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(31, 111, 235, 0.45);
}

.brand-domain {
  font-size: 0.75rem;
  font-weight: 600;
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  letter-spacing: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-link {
  color: #cbd5e1;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #1d4ed8 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(31, 111, 235, 0.5);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #059669 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, #047857 100%);
  transform: translateY(-1px);
}

.btn-outline-light {
  background: rgba(255, 255, 255, 0.06);
  color: #f8fafc;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.9rem 1.75rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.2rem;
}

/* ==========================================================================
   2. HERO SECTION (#home)
   ========================================================================== */
.hero-section {
  background: radial-gradient(circle at 20% 20%, rgba(31, 111, 235, 0.22) 0%, transparent 45%),
              radial-gradient(circle at 80% 70%, rgba(16, 185, 129, 0.14) 0%, transparent 45%),
              linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-hero) 100%);
  color: var(--text-light);
  padding: 4.5rem 1.5rem 5rem;
  border-bottom: 1px solid var(--border-dark);
  position: relative;
  overflow: hidden;
}

.hero-container {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pill-primary {
  background: rgba(31, 111, 235, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.4);
}

.pill-success {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.pill-neutral {
  background: rgba(148, 163, 184, 0.15);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.25rem;
}

.hero-title .text-gradient {
  background: linear-gradient(90deg, #60a5fa 0%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: #cbd5e1;
  margin-bottom: 2rem;
  max-width: 620px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.hero-portable-note {
  font-size: 0.85rem;
  color: var(--text-light-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hero-portable-note code {
  font-family: var(--font-mono);
  color: #93c5fd;
  background: rgba(30, 41, 59, 0.8);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

/* Hero App Preview Card */
.hero-preview-window {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

.window-titlebar {
  background: #1e293b;
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #334155;
}

.window-dots {
  display: flex;
  gap: 0.45rem;
}

.win-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.win-dot.red { background: #ef4444; }
.win-dot.yellow { background: #f59e0b; }
.win-dot.green { background: #10b981; }

.window-caption {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #cbd5e1;
}

.window-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preview-target-bar {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.preview-canvas-mock {
  background: #090d16;
  border: 1px dashed #3b82f6;
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.mock-field-box {
  background: rgba(31, 111, 235, 0.14);
  border: 1.5px solid #3b82f6;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
}

.mock-seq {
  background: var(--primary);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  margin-right: 0.6rem;
}

.mock-val {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #34d399;
}

.preview-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #34d399;
}

/* Metrics Strip */
.metrics-strip {
  max-width: 1240px;
  margin: 3.5rem auto 0;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.metric-item h3 {
  font-size: 2.1rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.5px;
}

.metric-item p {
  font-size: 0.9rem;
  color: var(--text-light-muted);
  margin-top: 0.2rem;
}

/* ==========================================================================
   3. COMMON SECTION LAYOUT
   ========================================================================== */
.section {
  padding: 5rem 1.5rem;
}

.section-alt {
  background-color: var(--bg-white);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.container {
  max-width: 1240px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.6px;
  line-height: 1.25;
  margin-bottom: 0.85rem;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
}

/* ==========================================================================
   4. FEATURES SECTION (#features)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin-bottom: 3.5rem;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #93c5fd;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.65rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.86rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature-list li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 800;
}

/* Compatibility Banner */
.compat-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--text-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin-bottom: 3.5rem;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2rem;
  align-items: center;
}

.compat-chips {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.compat-chip {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
}

/* Interactive Demo Showcase Box inside Features */
.interactive-showcase {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.showcase-tabs {
  background: #f1f5f9;
  border-bottom: 1px solid var(--border-light);
  padding: 0.75rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.tab-btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.designer-grid {
  display: grid;
  grid-template-columns: 1fr 330px;
  min-height: 480px;
}

.canvas-stage {
  background: #0f172a;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: auto;
}

#vfd-canvas {
  background: #ffffff;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  cursor: crosshair;
  max-width: 100%;
}

.designer-inspector {
  padding: 1.5rem;
  background: #f8fafc;
  border-left: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.55rem 0.75rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--bg-white);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.15);
}

.code-drawer {
  background: #0d1117;
  color: #e2e8f0;
  padding: 1rem 1.5rem;
  border-top: 1px solid #1e293b;
}

.code-drawer pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  max-height: 220px;
  overflow-y: auto;
  white-space: pre;
  color: #93c5fd;
  margin-top: 0.5rem;
}

/* Simulator Layout */
.sim-grid {
  display: grid;
  grid-template-columns: 1fr 350px;
}

.sim-stage {
  padding: 2rem;
}

.sim-console {
  background: #0f172a;
  color: #f8fafc;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sim-log-box {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  height: 310px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.sim-input-active {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.25) !important;
  background-color: #eff6ff !important;
}

/* ==========================================================================
   5. DOWNLOAD SECTION (#download)
   ========================================================================== */
.portable-hero-card {
  background: linear-gradient(135deg, #0b1120 0%, #172554 100%);
  color: #ffffff;
  border: 2px solid #3b82f6;
  border-radius: var(--radius-xl);
  padding: 2.75rem;
  box-shadow: var(--shadow-xl);
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.portable-contents-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
  margin: 1.5rem 0;
}

.portable-item {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.portable-item code {
  font-family: var(--font-mono);
  color: #93c5fd;
  font-weight: 600;
}

.portable-download-box {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.checksum-bar {
  background: #090d16;
  border: 1px solid #334155;
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #94a3b8;
  word-break: break-all;
  text-align: left;
}

.download-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.dl-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.dl-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.dl-card p {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.step-card {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: relative;
}

.step-number {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.85rem;
}

/* ==========================================================================
   6. ABOUT SECTION (#about)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 3.5rem;
}

.about-story h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.about-story p {
  color: var(--text-secondary);
  margin-bottom: 1.15rem;
  font-size: 1rem;
}

.milestone-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.milestone-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: 1rem;
}

.milestone-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.15rem 1.5rem;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.94rem;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ==========================================================================
   7. CONTACT US SECTION (#contact)
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2.5rem;
}

.contact-info-panel {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.contact-channel-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
}

.contact-channel {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.channel-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid rgba(59, 130, 246, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-form-panel {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-alert {
  display: none;
  margin-top: 1.25rem;
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  color: #065f46;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

.contact-alert.visible {
  display: block;
}

/* ==========================================================================
   8. FOOTER
   ========================================================================== */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-light-muted);
  padding: 4rem 1.5rem 2.5rem;
  border-top: 1px solid var(--border-dark);
}

.footer-grid {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-dark);
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: 1240px;
  margin: 1.75rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-container,
  .portable-hero-card,
  .about-grid,
  .contact-grid,
  .compat-banner {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .download-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .designer-grid,
  .sim-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #0b1120;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border-dark);
  }
  .nav-menu.open {
    display: flex;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid,
  .download-cards-grid,
  .steps-grid,
  .portable-contents-list,
  .compat-chips,
  .form-row-2,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}