/* ============================================
   BoardFlow — Global Styles
   ============================================ */

body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  background-color: var(--canvas);
  background-image:
    radial-gradient(at 18% 22%, var(--mesh-blob-1) 0px, transparent 45%),
    radial-gradient(at 82% 18%, var(--mesh-blob-2) 0px, transparent 45%),
    radial-gradient(at 68% 78%, var(--mesh-blob-3) 0px, transparent 45%),
    radial-gradient(at 12% 88%, var(--mesh-blob-4) 0px, transparent 45%);
  background-attachment: fixed;
  background-size: 100% 100%;
  animation: mesh-drift 24s ease-in-out infinite alternate;
}

@keyframes mesh-drift {
  0%   { background-position: 0% 0%, 100% 0%, 50% 100%, 0% 100%; }
  50%  { background-position: 20% 25%, 75% 15%, 60% 70%, 15% 80%; }
  100% { background-position: 35% 10%, 60% 35%, 45% 65%, 25% 90%; }
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---- Pages ---- */

.page {
  display: none;
  flex: 1;
  overflow: hidden;
}

.page.active {
  display: flex;
  flex-direction: column;
  animation: pageIn 0.2s ease;
}

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

/* ---- Skip Link ---- */

.skip-link {
  position: fixed;
  top: -100%;
  left: 8px;
  z-index: 9999;
  background: var(--primary);
  color: var(--ink-inverse);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 8px;
}

/* ---- Buttons: 3 Unified Variants ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font: var(--text-button);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-5);
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  min-height: 40px;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.btn-primary {
  background: var(--primary);
  color: var(--primary-on);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2) inset,
    0 4px 12px color-mix(in srgb, var(--primary) 25%, transparent);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.25) inset,
    0 8px 20px color-mix(in srgb, var(--primary) 30%, transparent);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: var(--primary-active);
  transform: scale(0.97);
}

.btn-primary:focus-visible {
  box-shadow: var(--focus-ring), 0 4px 12px color-mix(in srgb, var(--primary) 25%, transparent);
}

/* Secondary (glass) */
.btn-secondary {
  background: var(--glass-2);
  color: var(--ink);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
}

.btn-secondary:hover {
  background: var(--glass-3);
  border-color: var(--glass-border-strong);
  transform: translateY(-1px);
}

.btn-secondary:focus-visible {
  box-shadow: var(--focus-ring);
}

/* Ghost (subtle) */
.btn-ghost {
  background: transparent;
  color: var(--ink-secondary);
}

.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--ink);
}

.btn-ghost:focus-visible {
  box-shadow: var(--focus-ring);
}

/* Danger (destructive action) */
.btn-danger {
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  color: var(--danger);
  border: 1px solid transparent;
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-danger:focus-visible {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 40%, transparent);
}

/* Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: 13px;
  min-height: 32px;
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: 16px;
  min-height: 48px;
}

.btn-block {
  width: 100%;
}

/* Icon button (circular) */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--ink-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover {
  background: var(--surface-hover);
  color: var(--ink);
}

.btn-icon:focus-visible {
  box-shadow: var(--focus-ring);
}

.btn-icon:active {
  transform: scale(0.9);
}

/* ---- Forms ---- */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-secondary);
}

input[type='text'],
input[type='email'],
input[type='password'],
input[type='url'],
input[type='search'],
input[type='number'],
select,
textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

input::placeholder {
  color: var(--ink-faint);
}

textarea {
  border-radius: var(--radius-sm);
  resize: vertical;
  min-height: 80px;
}

/* ---- Cards ---- */

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  padding: var(--space-6);
}

.card-elevated {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-card);
  padding: var(--space-6);
  box-shadow: var(--shadow-soft);
}

/* ---- Badge ---- */

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
}

/* ---- Loading Spinner ---- */

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--hairline);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Toast Container ---- */

.toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

/* ---- Utility ---- */

.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;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.hidden { display: none !important; }

/* ---- Auth Layout ---- */

.auth-page {
  align-items: center;
  justify-content: center;
  background: var(--canvas-soft);
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: var(--space-xl);
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xxl);
  box-shadow: var(--shadow-elevated);
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.auth-logo h1 {
  font-size: var(--text-heading-1);
  font-weight: var(--weight-bold);
  color: var(--ink);
  margin: 0 0 4px;
}

.auth-logo p {
  font-size: var(--text-body-sm);
  color: var(--ink-secondary);
  margin: 0;
}