/* ==========================================================================
   SentriWall Cyber Security — Design Tokens
   ========================================================================== */

:root {
  /* Fluid type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.15rem + 2.75vw, 3.75rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* 4px spacing system */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 160ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 980px;
  --content-wide: 1240px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

/* ==========================================================================
   Color System — Signal Blue (trust) + Verified Green (approval) + Alert Red
   ========================================================================== */

:root,
[data-theme='light'] {
  --color-bg: #f3f5f8;
  --color-surface: #ffffff;
  --color-surface-2: #f9fafb;
  --color-surface-offset: #eaeef3;
  --color-surface-offset-2: #dde3ea;
  --color-divider: #dfe4ea;
  --color-border: #cfd6de;

  --color-text: #0e1420;
  --color-text-muted: #4d5867;
  --color-text-faint: #96a0ac;
  --color-text-inverse: #f7f9fb;

  /* Primary — Signal Blue */
  --color-primary: #14548f;
  --color-primary-hover: #0f3f6b;
  --color-primary-active: #0b2e4f;
  --color-primary-highlight: #d7e4f0;

  /* Success / Approved — Verified Green */
  --color-success: #1c7a3e;
  --color-success-hover: #145f30;
  --color-success-active: #0f4a25;
  --color-success-highlight: #d3e9d9;

  /* Alert / Threat — Signal Red */
  --color-alert: #a83226;
  --color-alert-hover: #86271d;
  --color-alert-active: #691e16;
  --color-alert-highlight: #ecd6d2;

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 250 / 0.06);
  --shadow-md: 0 6px 20px oklch(0.2 0.02 250 / 0.08);
  --shadow-lg: 0 20px 48px oklch(0.2 0.02 250 / 0.14);
}

[data-theme='dark'] {
  --color-bg: #0a0e15;
  --color-surface: #10151e;
  --color-surface-2: #131924;
  --color-surface-offset: #171e2a;
  --color-surface-offset-2: #1d2532;
  --color-divider: #232b39;
  --color-border: #2a3342;

  --color-text: #e6ebf2;
  --color-text-muted: #9aa6b6;
  --color-text-faint: #5d6979;
  --color-text-inverse: #0e1420;

  --color-primary: #5b9bd8;
  --color-primary-hover: #7bb0e2;
  --color-primary-active: #3f7ab5;
  --color-primary-highlight: #1c3149;

  --color-success: #4bb571;
  --color-success-hover: #63c887;
  --color-success-active: #38935a;
  --color-success-highlight: #16321f;

  --color-alert: #d97564;
  --color-alert-hover: #e28d7e;
  --color-alert-active: #bb5847;
  --color-alert-highlight: #3a2019;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 6px 20px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a0e15;
    --color-surface: #10151e;
    --color-surface-2: #131924;
    --color-surface-offset: #171e2a;
    --color-surface-offset-2: #1d2532;
    --color-divider: #232b39;
    --color-border: #2a3342;
    --color-text: #e6ebf2;
    --color-text-muted: #9aa6b6;
    --color-text-faint: #5d6979;
    --color-text-inverse: #0e1420;
    --color-primary: #5b9bd8;
    --color-primary-hover: #7bb0e2;
    --color-primary-active: #3f7ab5;
    --color-primary-highlight: #1c3149;
    --color-success: #4bb571;
    --color-success-hover: #63c887;
    --color-success-active: #38935a;
    --color-success-highlight: #16321f;
    --color-alert: #d97564;
    --color-alert-hover: #e28d7e;
    --color-alert-active: #bb5847;
    --color-alert-highlight: #3a2019;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 6px 20px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.5);
  }
}

/* ==========================================================================
   Base typography & layout helpers
   ========================================================================== */

body {
  font-family: var(--font-body);
  background:
    radial-gradient(ellipse at top right, oklch(from var(--color-primary) l c h / 0.06), transparent 55%),
    var(--color-bg);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 650;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container--wide {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  font-weight: 600;
}

.section-heading {
  font-size: var(--text-xl);
  max-width: 46ch;
}

.section-lede {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 62ch;
  margin-top: var(--space-3);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  z-index: 200;
  font-size: var(--text-sm);
  font-weight: 600;
}
.skip-link:focus {
  top: var(--space-4);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  min-height: 44px;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--color-primary-active);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: oklch(from var(--color-text) l c h / 0.16);
}
.btn-ghost:hover {
  background: var(--color-surface-offset);
  border-color: oklch(from var(--color-text) l c h / 0.24);
}

.btn-block {
  width: 100%;
}

/* Green "Online Approved" trust button */
.btn-approved {
  background: var(--color-success);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-height: 40px;
  cursor: default;
}
.btn-approved:hover {
  background: var(--color-success-hover);
}
.btn-approved svg {
  flex-shrink: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}

.site-header .container--wide {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  text-decoration: none;
}
.logo svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.main-nav ul {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.main-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
}
.main-nav a:hover {
  color: var(--color-text);
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}
.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

@media (max-width: 860px) {
  .main-nav { display: none; }
}

/* ==========================================================================
   Hero — asymmetric grid, contact card top-right
   ========================================================================== */

.hero {
  padding-block: clamp(var(--space-10), 7vw, var(--space-20)) clamp(var(--space-12), 8vw, var(--space-20));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}

.hero-content h1 {
  font-size: var(--text-2xl);
  margin-top: var(--space-4);
}

.hero-content .accent {
  color: var(--color-primary);
}

.hero-content p.lede {
  margin-top: var(--space-5);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 54ch;
}

.trust-seal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.trust-seal__text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.hero-stat .num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  display: block;
}
.hero-stat .label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Contact card — pinned to the top-right of the page */
.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  position: sticky;
  top: calc(var(--space-16) + var(--space-4));
}

.contact-card__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.contact-card h2 {
  font-size: var(--text-lg);
}

.contact-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.contact-card__sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.form-field {
  margin-bottom: var(--space-4);
}
.form-field label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  font-size: var(--text-sm);
  min-height: 44px;
}
.form-field textarea {
  min-height: 88px;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
  text-align: center;
}

.form-error {
  display: none;
  font-size: var(--text-xs);
  color: var(--color-alert);
  background: var(--color-alert-highlight);
  border: 1px solid var(--color-alert);
  border-radius: var(--radius-sm, 6px);
  padding: var(--space-2) var(--space-3);
  margin-top: var(--space-2);
}

.form-error.is-visible {
  display: block;
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-6) var(--space-2);
}
.form-success.is-visible {
  display: block;
}
.form-success svg {
  margin: 0 auto var(--space-3);
  color: var(--color-success);
}
.form-success h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}
.form-success p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 auto;
}

.contact-form.is-hidden {
  display: none;
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .contact-card {
    position: static;
    order: -1;
  }
}

/* ==========================================================================
   Feature list (five bullet points) — vertical, numbered, no card grid
   ========================================================================== */

.features {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.features-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.feature-list {
  margin-top: var(--space-8);
}

.feature-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.feature-item:last-child {
  border-bottom: 1px solid var(--color-divider);
}

.feature-item .idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
  padding-top: var(--space-1);
}

.feature-item h3 {
  font-size: var(--text-lg);
  font-family: var(--font-body);
  font-weight: 700;
}

.feature-item p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-base);
}

@media (max-width: 900px) {
  .features-layout {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Trust / Approved section
   ========================================================================== */

.trust-banner {
  background: var(--color-surface-offset);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 6vw, var(--space-12));
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

.trust-copy .badge-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.trust-stats {
  display: flex;
  gap: var(--space-10);
}

.trust-stat .num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  display: block;
}
.trust-stat .label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

@media (max-width: 900px) {
  .trust-banner {
    grid-template-columns: 1fr;
  }
  .trust-stats {
    flex-wrap: wrap;
    row-gap: var(--space-6);
  }
}

/* ==========================================================================
   Resources / trusted links
   ========================================================================== */

.resources {
  border-top: 1px solid var(--color-divider);
}

.resources-grid {
  margin-top: var(--space-10);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3) var(--space-6);
}

.resource-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-decoration: none;
  line-height: 1.3;
}
.resource-link:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}
.resource-link svg {
  flex-shrink: 0;
  color: var(--color-text-faint);
  width: 14px;
  height: 14px;
}
.resource-link:hover svg {
  color: var(--color-primary);
}

@media (max-width: 1080px) {
  .resources-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 760px) {
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .resources-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   CTA banner
   ========================================================================== */

.cta-banner {
  background: linear-gradient(180deg, var(--color-primary-active), var(--color-primary));
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 7vw, var(--space-16));
  text-align: left;
  color: var(--color-text-inverse);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.cta-banner h2 {
  color: var(--color-text-inverse);
  font-size: var(--text-xl);
  max-width: 32ch;
}
.cta-banner p {
  color: oklch(from var(--color-text-inverse) l c h / 0.82);
  margin-top: var(--space-3);
  max-width: 48ch;
}
.cta-banner .btn-primary {
  background: var(--color-text-inverse);
  color: var(--color-primary-active);
}
.cta-banner .btn-primary:hover {
  background: oklch(from var(--color-text-inverse) l c h / 0.9);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-10);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  max-width: 40ch;
}

.footer-col h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer-col a:hover {
  color: var(--color-text);
}

.footer-bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

@media (max-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}