/* ═══════════════════════════════════════════════════════════════════
   Shield Design System — Components
   Reusable primitives built on top of tokens.css.
   Import order: tokens.css, then this file, then page-specific overrides.
   ═══════════════════════════════════════════════════════════════════ */

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

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

body {
  font-family: var(--font-body);
  color: var(--ink-900);
  background: var(--ink-50);
  line-height: var(--leading-normal);
  font-size: var(--text-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--ink-900);
}

a {
  color: var(--brand-600);
  text-decoration: none;
  transition: color var(--d-fast) var(--ease-out-quart);
}
a:hover { color: var(--brand-700); }

img, svg { max-width: 100%; display: block; }

/* ─── Focus rings (accessibility) ───────────────────────────────── */
:focus-visible {
  outline: none;
  box-shadow: var(--shadow-ring);
  border-radius: var(--r-sm);
}

/* Skip-link for keyboard users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  padding: 8px 16px;
  background: var(--brand-600);
  color: var(--white);
  border-radius: var(--r-sm);
  z-index: var(--z-toast);
  transition: top var(--d-mid) var(--ease-out-quart);
}
.skip-link:focus { top: 16px; }

/* ─── Layout ────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--s-6);
}
.container-narrow { max-width: var(--container-narrow); }
.container-auth   { max-width: var(--container-auth); }

/* ─── Section primitives ────────────────────────────────────────── */
.section { padding: var(--s-20) 0; }
.section-sm { padding: var(--s-16) 0; }
.section-header {
  text-align: center;
  margin-bottom: var(--s-16);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.section-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--brand-600);
  margin-bottom: var(--s-3);
}
.section-title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  margin-bottom: var(--s-4);
}
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--ink-600);
  line-height: var(--leading-normal);
}

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 13px 24px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  line-height: 1;
  letter-spacing: 0;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition:
    background var(--d-fast) var(--ease-out-quart),
    border-color var(--d-fast) var(--ease-out-quart),
    color var(--d-fast) var(--ease-out-quart),
    transform var(--d-fast) var(--ease-out-quart),
    box-shadow var(--d-mid) var(--ease-out-quart);
  user-select: none;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 16px 30px; font-size: var(--text-base); border-radius: var(--r-lg); }
.btn-sm { padding: 9px 16px; font-size: var(--text-xs); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
  color: var(--white);
  box-shadow: 0 6px 16px -6px rgba(0, 93, 172, 0.5);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
  transform: translateY(-1px);
  box-shadow: 0 10px 24px -8px rgba(0, 93, 172, 0.55);
  color: var(--white);
}

.btn-secondary {
  background: var(--brand-100);
  color: var(--brand-700);
  border-color: var(--brand-200);
}
.btn-secondary:hover {
  background: var(--brand-200);
  color: var(--brand-800);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-700);
  border-color: var(--ink-300);
}
.btn-ghost:hover {
  background: var(--ink-100);
  border-color: var(--ink-400);
  color: var(--ink-900);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
  color: var(--white);
}

.btn-white {
  background: var(--white);
  color: var(--brand-700);
}
.btn-white:hover {
  background: var(--brand-50);
  color: var(--brand-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-full { width: 100%; }

/* ─── Form fields ───────────────────────────────────────────────── */
.field {
  display: block;
  margin-bottom: var(--s-5);
}
.field:last-child { margin-bottom: 0; }

.field-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--ink-800);
  margin-bottom: var(--s-2);
}
.field-label-optional {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--text-xs);
  color: var(--ink-500);
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--white);
  border: 1.5px solid rgba(203, 213, 225, 0.4);
  border-radius: var(--r-md);
  transition: border-color var(--d-fast) var(--ease-out-quart), box-shadow var(--d-mid) var(--ease-out-quart);
}
.input-wrap:focus-within {
  border-color: var(--brand-600);
  box-shadow: var(--shadow-ring);
}
.input-wrap.error {
  border-color: var(--danger-600);
}
.input-wrap.error:focus-within { box-shadow: var(--shadow-ring-danger); }

.input-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: var(--s-4);
  color: var(--ink-500);
  flex-shrink: 0;
}

.input-wrap input,
.input-wrap select {
  flex: 1;
  min-width: 0;
  width: 100%;
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--ink-900);
  background: transparent;
  border: none;
  outline: none;
}
.input-wrap input::placeholder { color: var(--ink-400); }

.input-wrap .input-action {
  display: flex;
  align-items: center;
  padding: 0 var(--s-4);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink-500);
  transition: color var(--d-fast);
}
.input-wrap .input-action:hover { color: var(--brand-600); }

.field-error {
  display: none;
  margin-top: var(--s-2);
  font-size: var(--text-xs);
  color: var(--danger-600);
  font-weight: 500;
}
.field-error.show { display: block; }

/* ─── Checkbox ─────────────────────────────────────────────────── */
.checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: var(--text-sm);
  color: var(--ink-700);
  cursor: pointer;
  line-height: var(--leading-normal);
}
.checkbox-wrap input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--brand-600);
  cursor: pointer;
  flex-shrink: 0;
}
.checkbox-wrap a {
  color: var(--brand-600);
  font-weight: 500;
}

/* ─── Alerts ───────────────────────────────────────────────────── */
.alert {
  display: none;
  align-items: flex-start;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  margin-bottom: var(--s-5);
  border: 1px solid transparent;
}
.alert.show { display: flex; }
.alert svg { flex-shrink: 0; margin-top: 1px; }

.alert-error {
  background: var(--danger-100);
  border-color: rgba(220, 38, 38, 0.2);
  color: var(--danger-700);
}
.alert-success {
  background: var(--success-100);
  border-color: rgba(22, 163, 74, 0.2);
  color: var(--success-700);
}
.alert-info {
  background: var(--info-100);
  border-color: rgba(14, 165, 233, 0.2);
  color: #075985;
}

/* ─── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--white);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--s-8);
  border: none;
}
.card-interactive {
  transition: transform var(--d-mid) var(--ease-out-quart),
              box-shadow var(--d-mid) var(--ease-out-quart);
}
.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ─── Badges ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-1) var(--s-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--r-full);
  background: var(--brand-100);
  color: var(--brand-700);
}
.badge-outline-white {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success-600);
  animation: badge-pulse 2s var(--ease-in-out) infinite;
}
@keyframes badge-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.65; transform: scale(1.25); }
}

/* ─── Scroll-reveal (used with reveal.js) ───────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--d-very-slow) var(--ease-out-expo),
    transform var(--d-very-slow) var(--ease-out-expo);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal-delay="1"] { transition-delay: 80ms; }
[data-reveal-delay="2"] { transition-delay: 160ms; }
[data-reveal-delay="3"] { transition-delay: 240ms; }
[data-reveal-delay="4"] { transition-delay: 320ms; }
[data-reveal-delay="5"] { transition-delay: 400ms; }

/* ─── Spinner (loading button) ──────────────────────────────────── */
.spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Utility helpers ──────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.visually-hidden { display: none; }