/* =========================================================
   BeachHub Design System (Official)
   Visual direction: light, clean, modern, iOS-like
   Scope: tokens + base components only
   ========================================================= */

:root {
  /* ---------- Typography ---------- */
  --bh-font-sans: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* ---------- Color: Brand ---------- */
  --bh-color-primary-50: #eff6ff;
  --bh-color-primary-100: #dbeafe;
  --bh-color-primary-200: #bfdbfe;
  --bh-color-primary-300: #93c5fd;
  --bh-color-primary-400: #60a5fa;
  --bh-color-primary-500: #0a84ff;
  --bh-color-primary-600: #0066d6;
  --bh-color-primary-700: #1d4ed8;

  --bh-color-secondary-500: #64748b;
  --bh-color-secondary-600: #475569;

  /* ---------- Color: Neutrals ---------- */
  --bh-gray-0: #ffffff;
  --bh-gray-25: #fcfdff;
  --bh-gray-50: #f8fafc;
  --bh-gray-100: #f1f5f9;
  --bh-gray-200: #e2e8f0;
  --bh-gray-300: #cbd5e1;
  --bh-gray-400: #94a3b8;
  --bh-gray-500: #64748b;
  --bh-gray-600: #475569;
  --bh-gray-700: #334155;
  --bh-gray-800: #1e293b;
  --bh-gray-900: #0f172a;

  /* ---------- Color: States ---------- */
  --bh-success-500: #16a34a;
  --bh-success-600: #15803d;
  --bh-success-bg: #ecfdf3;
  --bh-success-border: #bbf7d0;

  --bh-danger-500: #dc2626;
  --bh-danger-600: #b91c1c;
  --bh-danger-bg: #fef2f2;
  --bh-danger-border: #fecaca;

  --bh-warning-500: #d97706;
  --bh-warning-600: #b45309;
  --bh-warning-bg: #fffbeb;
  --bh-warning-border: #fde68a;

  /* ---------- Surfaces ---------- */
  --bh-bg-page: radial-gradient(circle at 10% -10%, #dbeafe 0%, transparent 42%), linear-gradient(180deg, #f7fbff 0%, #eef3fb 100%);
  --bh-bg-surface: rgba(255, 255, 255, 0.9);
  --bh-border-soft: rgba(15, 23, 42, 0.1);

  /* ---------- Radius ---------- */
  --bh-radius-xs: 8px;
  --bh-radius-sm: 12px;
  --bh-radius-md: 16px;
  --bh-radius-lg: 22px;
  --bh-radius-pill: 999px;

  /* ---------- Shadows ---------- */
  --bh-shadow-xs: 0 2px 8px rgba(15, 23, 42, 0.08);
  --bh-shadow-sm: 0 6px 16px rgba(15, 23, 42, 0.1);
  --bh-shadow-md: 0 10px 26px rgba(15, 23, 42, 0.12);
  --bh-shadow-lg: 0 16px 38px rgba(15, 23, 42, 0.16);

  /* ---------- Spacing (4px system) ---------- */
  --bh-space-1: 4px;
  --bh-space-2: 8px;
  --bh-space-3: 12px;
  --bh-space-4: 16px;
  --bh-space-5: 20px;
  --bh-space-6: 24px;
  --bh-space-7: 28px;
  --bh-space-8: 32px;
  --bh-space-10: 40px;
  --bh-space-12: 48px;

  /* ---------- Focus ---------- */
  --bh-focus-ring: 0 0 0 3px rgba(10, 132, 255, 0.22);
}

/* =========================================================
   Typography System
   ========================================================= */

html,
body {
  font-family: var(--bh-font-sans);
  color: var(--bh-gray-900);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  color: var(--bh-gray-900);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

h1 { font-size: clamp(30px, 5vw, 40px); font-weight: 800; }
h2 { font-size: clamp(26px, 4.3vw, 34px); font-weight: 800; }
h3 { font-size: clamp(22px, 3.8vw, 28px); font-weight: 700; }
h4 { font-size: clamp(19px, 3.1vw, 23px); font-weight: 700; }
h5 { font-size: clamp(17px, 2.6vw, 20px); font-weight: 700; }
h6 { font-size: clamp(15px, 2.3vw, 17px); font-weight: 700; }

.bh-text-sm { font-size: 14px; line-height: 1.45; }
.bh-text-md { font-size: 16px; line-height: 1.5; }
.bh-text-lg { font-size: 18px; line-height: 1.55; }
.bh-text-muted { color: var(--bh-gray-600); }

/* =========================================================
   Buttons
   ========================================================= */

.bh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bh-space-2);
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--bh-radius-sm);
  border: 1px solid transparent;
  font-family: var(--bh-font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: filter 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
  box-shadow: var(--bh-shadow-sm);
}

.bh-btn:hover { filter: brightness(1.03); }
.bh-btn:active { transform: scale(0.98); }
.bh-btn:focus-visible { outline: none; box-shadow: var(--bh-shadow-sm), var(--bh-focus-ring); }

.bh-btn-primary {
  background: linear-gradient(135deg, var(--bh-color-primary-500), var(--bh-color-primary-600));
  color: var(--bh-gray-0);
}

.bh-btn-secondary {
  background: var(--bh-gray-100);
  border-color: var(--bh-gray-300);
  color: var(--bh-gray-800);
}

.bh-btn-danger {
  background: var(--bh-danger-500);
  color: var(--bh-gray-0);
}

.bh-btn-ghost {
  background: transparent;
  border-color: var(--bh-gray-300);
  color: var(--bh-gray-700);
  box-shadow: none;
}

.bh-btn:disabled,
.bh-btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  filter: none;
  transform: none;
  box-shadow: none;
}

/* =========================================================
   Cards
   ========================================================= */

.bh-card {
  background: var(--bh-bg-surface);
  border: 1px solid var(--bh-border-soft);
  border-radius: var(--bh-radius-md);
  box-shadow: var(--bh-shadow-sm);
  padding: var(--bh-space-6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.bh-card-compact {
  padding: var(--bh-space-4);
  border-radius: var(--bh-radius-sm);
}

/* =========================================================
   Modals
   ========================================================= */

.bh-modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--bh-space-4);
  background: rgba(15, 23, 42, 0.46);
  z-index: 10000;
}

.bh-modal {
  width: 100%;
  max-width: 440px;
  background: var(--bh-gray-0);
  border: 1px solid var(--bh-border-soft);
  border-radius: var(--bh-radius-lg);
  box-shadow: var(--bh-shadow-lg);
  padding: var(--bh-space-6);
}

.bh-modal-title {
  margin-bottom: var(--bh-space-3);
}

.bh-modal-actions {
  display: flex;
  gap: var(--bh-space-3);
  margin-top: var(--bh-space-4);
}

.bh-modal-actions > .bh-btn {
  flex: 1;
}

/* =========================================================
   Badges
   ========================================================= */

.bh-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 24px;
  padding: 4px 10px;
  border-radius: var(--bh-radius-pill);
  border: 1px solid transparent;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.bh-badge-primary {
  background: var(--bh-color-primary-100);
  border-color: var(--bh-color-primary-200);
  color: var(--bh-color-primary-700);
}

.bh-badge-success {
  background: var(--bh-success-bg);
  border-color: var(--bh-success-border);
  color: var(--bh-success-600);
}

.bh-badge-danger {
  background: var(--bh-danger-bg);
  border-color: var(--bh-danger-border);
  color: var(--bh-danger-600);
}

.bh-badge-warning {
  background: var(--bh-warning-bg);
  border-color: var(--bh-warning-border);
  color: var(--bh-warning-600);
}

.bh-badge-neutral {
  background: var(--bh-gray-100);
  border-color: var(--bh-gray-300);
  color: var(--bh-gray-700);
}

/* =========================================================
   Inputs
   ========================================================= */

.bh-input,
.bh-select,
.bh-textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: var(--bh-radius-sm);
  border: 1px solid var(--bh-gray-300);
  background: rgba(255, 255, 255, 0.96);
  color: var(--bh-gray-900);
  font-family: var(--bh-font-sans);
  font-size: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.bh-textarea {
  min-height: 96px;
  resize: vertical;
}

.bh-input::placeholder,
.bh-textarea::placeholder {
  color: var(--bh-gray-400);
}

.bh-input:focus,
.bh-select:focus,
.bh-textarea:focus {
  outline: none;
  border-color: var(--bh-color-primary-500);
  box-shadow: var(--bh-focus-ring);
}

.bh-input[disabled],
.bh-select[disabled],
.bh-textarea[disabled] {
  background: var(--bh-gray-100);
  color: var(--bh-gray-500);
  cursor: not-allowed;
}