:root {
  --bg: #0a1019;
  --bg2: #11192a;
  --surface: rgba(17, 24, 39, 0.82);
  --surface-strong: #171f31;
  --surface-soft: rgba(255, 255, 255, 0.05);
  --panel-bg: rgba(17, 24, 39, 0.82);
  --panel-bg-soft: rgba(255, 255, 255, 0.05);
  --chip-bg: rgba(255, 255, 255, 0.045);
  --border: rgba(144, 168, 206, 0.18);
  --border-strong: rgba(144, 168, 206, 0.28);
  --accent: #59a6ff;
  --accent-2: #7bf0c8;
  --accent-3: #8e7cff;
  --text: #eef4ff;
  --text-dim: #9daccc;
  --danger: #ff6b6b;
  --success: #37c871;
  --warning: #ffb648;
  --gap: 16px;
  --cols: 4;
  --shadow: 0 22px 56px rgba(0, 0, 0, 0.28);
  --shadow-soft: 0 14px 30px rgba(0, 0, 0, 0.18);
  --shadow-card: 0 22px 56px rgba(0, 0, 0, 0.28);
  --ambient-1: rgba(89, 166, 255, 0.14);
  --ambient-2: rgba(123, 240, 200, 0.08);
  --grid-line: rgba(255, 255, 255, 0.03);
  --grid-opacity: 0.16;
  --control-bg: rgba(255, 255, 255, 0.035);
  --control-hover: rgba(255, 255, 255, 0.075);
  --control-active: rgba(255, 255, 255, 0.11);
  --control-border: var(--border);
  --card-bg: linear-gradient(180deg, var(--surface), var(--panel-bg-soft));
  --card-hover: linear-gradient(180deg, var(--surface-strong), var(--panel-bg-soft));
}

body.light {
  --bg: #f7f9fd;
  --bg2: #edf3fb;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --surface-soft: rgba(55, 84, 128, 0.06);
  --panel-bg: rgba(255, 255, 255, 0.92);
  --panel-bg-soft: rgba(245, 248, 252, 0.96);
  --chip-bg: rgba(243, 247, 253, 0.98);
  --border: rgba(103, 126, 168, 0.24);
  --border-strong: rgba(84, 117, 178, 0.42);
  --text: #152337;
  --text-dim: #52637c;
  --shadow: 0 20px 44px rgba(70, 98, 143, 0.14);
  --shadow-soft: 0 10px 24px rgba(62, 88, 129, 0.11);
  --shadow-card: 0 18px 42px rgba(62, 88, 129, 0.15);
  --ambient-1: rgba(89, 166, 255, 0.1);
  --ambient-2: rgba(123, 240, 200, 0.05);
  --grid-line: rgba(88, 113, 151, 0.028);
  --grid-opacity: 0.045;
}

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

[hidden] {
  display: none !important;
}

html {
  width: 100%;
  max-width: 100%;
  background: var(--bg);
  scrollbar-width: thin;
  scrollbar-color: rgba(144, 168, 206, 0.22) transparent;
  overflow-x: hidden;
}

body {
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: dark;
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--ambient-1), transparent 24%),
    radial-gradient(circle at top right, var(--ambient-2), transparent 20%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  transition: background 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 38%, transparent 88%);
  pointer-events: none;
  opacity: var(--grid-opacity);
  z-index: 0;
}

body.light {
  color-scheme: light;
  background:
    radial-gradient(circle at top left, var(--ambient-1), transparent 28%),
    radial-gradient(circle at top right, var(--ambient-2), transparent 22%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 55%, var(--surface) 100%);
}

body.light::before {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: none;
  opacity: var(--grid-opacity);
}

a {
  color: inherit;
  transition: color 0.15s ease;
}

/* Landing Layout & Shell */
.landing-page {
  width: 100%;
  max-width: 100%;
  display: grid;
  place-items: center;
  padding-inline: 14px;
}

.landing-page::before {
  opacity: 0.15;
}

.landing-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  max-width: 1120px;
  margin-inline: auto;
  padding: clamp(20px, 4vw, 32px) 0 clamp(40px, 6vw, 56px);
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

/* Landing Panel (Card Sections) */
.landing-panel {
  padding: clamp(22px, 2.8vw, 32px);
  border-radius: 30px;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02)),
    var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.landing-section-head {
  max-width: 58ch;
  margin-bottom: 18px;
}

.landing-kicker {
  margin-bottom: 10px;
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.landing-section-head h2 {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.038em;
}

.landing-section-head p {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
}

/* Grids & Common Cards */
.landing-feature-grid,
.landing-steps,
.landing-local-grid,
.landing-split-grid,
.landing-usecases,
.landing-faq-grid {
  display: grid;
  gap: 14px;
}

.landing-feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.landing-feature-card,
.landing-step,
.landing-split-card,
.landing-usecase,
.landing-cta-panel {
  position: relative;
  overflow: hidden;
  padding: 18px 18px 16px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02)),
    rgba(10, 16, 25, 0.34);
}

.landing-feature-card h3,
.landing-step h3,
.landing-split-card h3,
.landing-usecase h3,
.landing-cta-panel h2 {
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.landing-feature-card p,
.landing-step p,
.landing-split-card p,
.landing-usecase p,
.landing-cta-text {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.68;
}

/* Actions & Buttons */
.landing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  color: #11192a;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow:
    0 12px 32px rgba(89, 166, 255, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.landing-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow:
    0 16px 36px rgba(89, 166, 255, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.landing-btn:active {
  transform: translateY(0);
  filter: brightness(0.95);
  box-shadow:
    0 8px 24px rgba(89, 166, 255, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.landing-btn:focus-visible {
  outline: 3px solid var(--accent-3);
  outline-offset: 2px;
}

.landing-actions-status {
  margin-top: 24px;
  padding: 16px 20px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  max-width: 480px;
}

.landing-status-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--warning);
  margin-bottom: 6px;
}

body.light .landing-status-badge {
  color: #d97706; /* darker amber/yellow for light theme readability */
}

.landing-status-text {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* Workflow Steps */
.landing-steps {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.landing-step {
  display: grid;
  gap: 10px;
}

.landing-step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: rgba(89, 166, 255, 0.14);
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
}

/* Specific Section Layouts */
.landing-panel-split {
  display: grid;
  gap: 18px;
}

.landing-split-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.landing-local-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.landing-usecases {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.landing-usecase {
  font-weight: 700;
  text-align: center;
  padding: 14px;
}

/* FAQ Grid */
.landing-faq-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.landing-faq-item {
  padding: 18px 18px 16px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02)),
    rgba(10, 16, 25, 0.34);
}

.landing-faq-item h3 {
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.landing-faq-item p {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 13.5px;
  line-height: 1.68;
}

/* CTA Panel */
.landing-cta-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.landing-cta-panel .landing-actions {
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  margin-top: 0;
}

/* Trust Section Content */
.landing-trust-content {
  display: grid;
  gap: 16px;
  max-width: 72ch;
}

.landing-trust-content p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.landing-trust-content strong {
  color: var(--text);
  font-weight: 700;
}

/* Footer Section */
.landing-footer {
  width: min(1120px, 100%);
  margin: 18px auto 42px;
  padding: 0 4px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.7;
}

.landing-footer-line {
  margin: 0;
}

.landing-footer-email {
  display: inline-flex;
  margin-top: 4px;
  margin-right: 16px;
  color: var(--text-dim);
  text-decoration: none;
}

.landing-footer-email:hover {
  color: var(--text);
}

.landing-footer-email:focus-visible {
  outline: 2px solid rgba(123, 240, 200, 0.8);
  outline-offset: 4px;
}

/* Theme Switcher Header Component */
.landing-header {
  width: min(1120px, 100%);
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 4px;
}

.landing-logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--control-bg);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--border-strong);
  background: var(--control-hover);
}

/* Light Theme overrides */
body.light .landing-page::before {
  opacity: 0.03;
}

body.light .landing-hero {
  border-color: var(--border);
  background:
    radial-gradient(circle at top right, var(--ambient-1), transparent 34%),
    linear-gradient(180deg, var(--panel-bg), var(--panel-bg-soft));
  box-shadow: var(--shadow-card);
  backdrop-filter: none;
}

body.light .landing-panel {
  border-color: var(--border);
  background: linear-gradient(180deg, var(--panel-bg), var(--panel-bg-soft));
  box-shadow: var(--shadow-card);
  backdrop-filter: none;
}

body.light .landing-mark {
  border-color: var(--border);
  background: linear-gradient(180deg, var(--surface-strong), var(--panel-bg-soft));
  box-shadow:
    0 18px 32px rgba(73, 99, 141, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.76);
}

body.light .landing-feature-card,
body.light .landing-step,
body.light .landing-split-card,
body.light .landing-usecase,
body.light .landing-faq-item,
body.light .landing-cta-panel {
  border-color: var(--border);
  background: var(--chip-bg);
  box-shadow: var(--shadow-soft);
}

body.light .landing-step-number {
  background: var(--surface-soft);
  color: var(--accent);
}

body.light .landing-status {
  background: var(--surface-strong);
  color: var(--text);
}

body.light .landing-text,
body.light .landing-section-head p {
  color: var(--text-dim);
}

body.light .landing-btn {
  box-shadow:
    0 12px 32px rgba(89, 166, 255, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

/* Animations */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Responsive Overrides (width < 980px) */
@media (max-width: 980px) {
  .landing-hero {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .landing-values {
    grid-template-columns: 1fr;
  }

  .landing-feature-grid,
  .landing-steps,
  .landing-usecases,
  .landing-local-grid,
  .landing-split-grid,
  .landing-faq-grid {
    grid-template-columns: 1fr;
  }

  .landing-value p,
  .landing-positioning p {
    max-width: 100%;
  }
}

/* Responsive Overrides (width < 720px) */
@media (max-width: 720px) {
  .landing-shell {
    width: min(1120px, calc(100% - 20px));
    padding-top: 16px;
  }

  .landing-hero,
  .landing-panel {
    padding: 18px;
    border-radius: 24px;
  }
}

/* Responsive Overrides (width < 640px) */
@media (max-width: 640px) {
  .landing-shell {
    width: min(1120px, calc(100% - 14px));
  }

  .landing-hero {
    min-height: auto;
    gap: 12px;
    padding: 20px;
  }

  .landing-lead {
    display: none;
  }

  .landing-text {
    margin-top: 10px;
  }

  .landing-actions {
    margin-top: 16px;
    gap: 8px;
    width: 100%;
  }

  .landing-actions .landing-btn {
    width: 100%;
  }

  .landing-status {
    max-width: 100%;
    margin-top: 12px;
    min-height: 32px;
    padding: 7px 12px;
    font-size: 11px;
  }

  .landing-visual {
    min-height: 150px;
  }

  .landing-mark {
    width: 100%;
    padding: 12px 16px;
    border-radius: 20px;
  }
}