/* Structural — Common components
 * Header, footer, buttons, cards — shared across all pages.
 */

/* === Container === */
.container {
  width: 100%;
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container-wide {
  width: 100%;
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background: rgba(250, 250, 249, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-normal) var(--ease-out);
}

.site-header.scrolled {
  border-bottom-color: var(--border-subtle);
}

.site-header__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: var(--fs-20);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-tight);
  transition: opacity var(--dur-fast) var(--ease-out);
}

.site-header__logo:hover {
  opacity: 0.7;
}

.site-header__logo-mark {
  width: 20px;
  height: 20px;
  color: var(--text-primary);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-header__nav-link {
  font-size: var(--fs-14);
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease-out);
}

.site-header__nav-link:hover {
  color: var(--text-primary);
}

/* === Footer === */
.site-footer {
  margin-top: var(--space-10);
  padding: var(--space-7) 0 var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

.site-footer__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.site-footer__copyright {
  font-size: var(--fs-13);
  color: var(--text-tertiary);
}

.site-footer__links {
  display: flex;
  gap: var(--space-5);
}

.site-footer__link {
  font-size: var(--fs-13);
  color: var(--text-tertiary);
  transition: color var(--dur-fast) var(--ease-out);
}

.site-footer__link:hover {
  color: var(--text-primary);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-size: var(--fs-14);
  font-weight: var(--fw-medium);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--text-primary);
  color: var(--text-inverse);
  border-color: var(--text-primary);
}

.btn--primary:hover {
  background: #000;
}

.btn--secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn--secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--text-tertiary);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn--ghost:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.btn--lg {
  padding: 14px 24px;
  font-size: var(--fs-16);
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: 6px 12px;
  font-size: var(--fs-13);
}

/* === Chip (suggestion pill) === */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: var(--fs-14);
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition:
    color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.chip:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
  background: var(--bg-tertiary);
  transform: translateY(-1px);
}

/* === Score Ring === */
.score-ring {
  --size: 44px;
  --progress: 0.8;
  width: var(--size);
  height: var(--size);
  position: relative;
}

.score-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-ring__bg {
  fill: none;
  stroke: var(--border-subtle);
  stroke-width: 3;
}

.score-ring__fg {
  fill: none;
  stroke: var(--score-high);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--dur-slow) var(--ease-out-expo);
}

.score-ring__label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  font-feature-settings: "tnum";
}

/* === Skeleton === */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--border-subtle) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === Domain tag === */
.domain-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--fs-12);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  letter-spacing: var(--ls-wide);
}

/* === Toast === */
.toast {
  position: fixed;
  top: calc(var(--header-height) + var(--space-3));
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  padding: 10px 18px;
  background: var(--text-primary);
  color: var(--text-inverse);
  font-size: var(--fs-14);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition:
    opacity var(--dur-normal) var(--ease-out),
    transform var(--dur-normal) var(--ease-out-expo);
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === Animations === */
.fade-in {
  animation: fadeIn var(--dur-slow) var(--ease-out) both;
}

.fade-in-up {
  animation: fadeInUp var(--dur-slow) var(--ease-out-expo) both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-focus-ring); }
  50% { box-shadow: 0 0 0 8px var(--accent-focus-ring); }
}