/**
 * PayLink design system — single source of truth.
 * Claude-inspired: warm, minimal, clear hierarchy.
 * Use in dashboard (index.html) and server-rendered pages (payment, success, paid-already).
 */

:root {
  /* Surfaces */
  --color-bg: #f7f6f3;
  --color-surface: #ffffff;
  --color-border: #e8e6e3;
  /* Text */
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  /* Accent — warm clay */
  --color-primary: #b85c38;
  --color-primary-hover: #9c4d2e;
  --color-primary-active: #853f26;
  /* Semantic */
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;
  /* Typography */
  --font: 'DM Sans', system-ui, sans-serif;
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  /* Motion */
  --transition: 0.15s ease;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  margin: 0;
  min-height: 100vh;
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-md) 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), opacity var(--transition);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(184, 92, 56, 0.25);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn--primary:active:not(:disabled) {
  background: var(--color-primary-active);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover:not(:disabled) {
  background: #f5f4f2;
  border-color: #d4d2ce;
}

.btn--sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

.btn.is-loading {
  pointer-events: none;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn--secondary .spinner {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: var(--color-text);
}

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

/* Form */
label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  color: var(--color-text);
}

input {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: 1rem;
  font-family: var(--font);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input::placeholder {
  color: var(--color-text-muted);
}

input:hover {
  border-color: #d4d2ce;
}

input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(184, 92, 56, 0.12);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-actions {
  margin-top: var(--space-lg);
}

/* Typography helpers */
.subtitle {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.link:hover {
  text-decoration: underline;
}

.error {
  color: var(--color-error);
  font-size: 0.875rem;
}

.hidden {
  display: none !important;
}

/* Payment page specific (used by server-rendered /p/:id and success/paid-already) */
.page-center {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.card--narrow {
  max-width: 360px;
  width: 100%;
  text-align: center;
}

.amount-display {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 1rem 0;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.note-muted {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  text-transform: uppercase;
}

.badge--paid {
  color: var(--color-success);
  background: rgba(5, 150, 105, 0.1);
}

.badge--pending {
  color: var(--color-warning);
  background: rgba(217, 119, 6, 0.1);
}

.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.row > *:first-child {
  min-width: 0;
}