/**
 * FeedMeSafe — Style Sheet
 * ------------------------
 * Mobile-first, medical-grade aesthetic.
 * Styled with antd-mobile v5 design tokens.
 * Dark mode via prefers-color-scheme.
 * High contrast mode via prefers-contrast.
 * Print layout for wallet card output.
 */

/* ============================
   CSS Custom Properties — antd-mobile Design Tokens
   ============================ */
:root:root {
  /* Brand colours */
  --color-primary: var(--adm-color-primary, #1677ff);
  --color-primary-dark: #0958d9;
  --color-primary-light: #e6f4ff;

  /* Severity colours */
  --color-high: var(--adm-color-danger, #ff3141);
  --color-high-bg: #fff1f0;
  --color-moderate: var(--adm-color-warning, #ff8f1f);
  --color-moderate-bg: #fff7e6;
  --color-low: #faad14;
  --color-low-bg: #fffbe6;

  /* Surfaces & text */
  --color-bg: var(--adm-color-background, #ffffff);
  --color-surface: var(--adm-color-box, #f5f5f5);
  --color-surface-alt: #e8e8e8;
  --color-text: var(--adm-color-text, #333333);
  --color-text-secondary: var(--adm-color-text-secondary, #666666);
  --color-text-muted: var(--adm-color-weak, #999999);
  --color-border: var(--adm-color-border, #eeeeee);
  --color-light: var(--adm-color-light, #cccccc);
  --color-error: var(--adm-color-danger, #ff3141);
  --color-error-bg: #fff1f0;
  --color-success: var(--adm-color-success, #00b578);
  --color-success-bg: #f6ffed;

  /* Typography — antd-mobile scale */
  --font-family: var(--adm-font-family, -apple-system, blinkmacsystemfont, 'Helvetica Neue', Helvetica, Segoe UI, Arial, Roboto, 'PingFang SC', 'miui', 'Hiragino Sans GB', 'Microsoft Yahei', sans-serif);
  --font-size-1: 10px;
  --font-size-2: 11px;
  --font-size-3: 12px;
  --font-size-4: 13px;
  --font-size-5: 14px;
  --font-size-6: 15px;
  --font-size-7: 16px;
  --font-size-8: 17px;
  --font-size-9: 18px;
  --font-size-10: 20px;
  --font-size-main: var(--adm-font-size-main, 14px);

  /* Alias to original naming for readability */
  --font-size-xs: var(--font-size-3, 12px);
  --font-size-sm: var(--font-size-5, 14px);
  --font-size-base: var(--font-size-7, 16px);
  --font-size-lg: var(--font-size-9, 18px);
  --font-size-xl: var(--font-size-10, 20px);
  --font-size-2xl: 24px;

  /* Spacing — antd-mobile 4/8/12/16/24 convention */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;

  /* Touch targets */
  --touch-min: 36px;

  /* Borders & radius — antd-mobile */
  --radius-sm: var(--adm-radius-small, 4px);
  --radius-md: var(--adm-radius-middle, 8px);
  --radius-lg: var(--adm-radius-large, 12px);

  /* Shadows — subtle antd-mobile feel */
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);

  /* Transitions — antd-mobile pattern */
  --transition-fast: 200ms ease;
  --transition-normal: 250ms ease;
}

/* ============================
   Dark Mode — antd-mobile tokens
   ============================ */
@media (prefers-color-scheme: dark) {
  :root:root {
    --adm-color-background: #1a1a1a;
    --adm-color-box: #0f0f0f;
    --adm-color-border: #333333;
    --adm-color-text: #ffffffd9;
    --adm-color-text-secondary: #ffffffa6;
    --adm-color-weak: #ffffff73;
    --adm-color-light: #ffffff4d;

    --color-bg: var(--adm-color-background, #1a1a1a);
    --color-surface: var(--adm-color-box, #0f0f0f);
    --color-surface-alt: #2a2a2a;
    --color-text: var(--adm-color-text, rgba(255, 255, 255, 0.85));
    --color-text-secondary: var(--adm-color-text-secondary, rgba(255, 255, 255, 0.65));
    --color-text-muted: var(--adm-color-weak, rgba(255, 255, 255, 0.45));
    --color-border: var(--adm-color-border, #333333);
    --color-light: var(--adm-color-light, rgba(255, 255, 255, 0.3));
    --color-primary-light: #111d2c;
    --color-error-bg: #2a1215;
    --color-success-bg: #162312;
    --color-high-bg: #2a1215;
    --color-moderate-bg: #2b1d0e;
    --color-low-bg: #2b2510;
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
  }
}

/* ============================
   High Contrast Mode
   ============================ */
@media (prefers-contrast: high) {
  :root {
    --color-text: #000000;
    --color-text-secondary: #333333;
    --color-border: #000000;
    --color-high: #b71c1c;
    --color-moderate: #e65100;
    --color-low: #f57f17;
  }

  .card {
    border: 2px solid var(--color-border);
  }

  .btn-primary {
    border: 2px solid var(--color-primary-dark);
  }

  .allergen-item {
    border: 2px solid var(--color-border);
  }
}

/* ============================
   Reset & Base
   ============================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================
   Views
   ============================ */
.view {
  min-height: 100vh;
  min-height: 100dvh;
}

/* ============================
   Header
   ============================ */
.app-header {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  padding-top: calc(var(--space-xl) + env(safe-area-inset-top, 0px));
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--adm-color-white, #ffffff);
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: -0.3px;
}

.tagline {
  font-size: var(--font-size-5);
  opacity: 0.85;
  margin-top: var(--space-xs);
}

/* ============================
   Creator Main
   ============================ */
.creator-main {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
  padding-bottom: 80px;
}

/* ============================
   Cards — antd-mobile style
   ============================ */
.card {
  background: var(--color-bg);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.card h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.hint {
  font-size: var(--font-size-3);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ============================
   Input Groups — antd-mobile Input style
   ============================ */
.input-group {
  margin-bottom: var(--space-md);
}

.input-group label {
  display: block;
  font-size: var(--font-size-5);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
}

.input-group input {
  width: 100%;
  min-height: var(--touch-min);
  padding: var(--space-sm) 0;
  border: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: 0;
  font-size: var(--font-size-main);
  font-family: var(--font-family);
  background: transparent;
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
}

.input-group input:focus {
  border-bottom-color: var(--color-primary);
}

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

/* ============================
   Allergen Grid
   ============================ */
.allergen-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 400px) {
  .allergen-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================
   Allergen Items (checkboxes) — antd-mobile style
   ============================ */
.allergen-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  cursor: pointer;
  min-height: var(--touch-min);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  -webkit-user-select: none;
  user-select: none;
  position: relative;
}

.allergen-item:hover {
  background: var(--color-surface);
}

.allergen-item:active {
  background: var(--color-primary-light);
  transform: scale(0.98);
}

/* Severity indicator strip on the left */
.allergen-item[data-severity="high"] {
  border-left: 3px solid var(--color-high);
}
.allergen-item[data-severity="moderate"] {
  border-left: 3px solid var(--color-moderate);
}
.allergen-item[data-severity="low"] {
  border-left: 3px solid var(--color-low);
}

.allergen-item.selected {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.allergen-item input[type="checkbox"] {
  /* Custom checkbox replaced by visual feedback via .selected */
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.allergen-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.allergen-name {
  font-size: var(--font-size-5);
  font-weight: 500;
  line-height: 1.3;
}

.allergen-desc {
  font-size: var(--font-size-3);
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* antd-mobile style checkbox — 22px square, smooth transition */
.allergen-check {
  margin-left: auto;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.allergen-item.selected .allergen-check {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--adm-color-white, #ffffff);
  font-size: var(--font-size-5);
  font-weight: 700;
  transform: scale(1.05);
}

/* ============================
   Expiry Selector
   ============================ */
.expiry-selector {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.expiry-btn {
  flex: 1;
  min-width: 70px;
  min-height: 32px;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-5);
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.expiry-btn.selected {
  background: var(--color-primary);
  color: var(--adm-color-white, #ffffff);
  border-color: var(--color-primary);
}

/* ============================
   Buttons — antd-mobile Button style
   ============================ */
.btn-primary {
  display: block;
  width: 100%;
  min-height: 36px;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: var(--adm-color-white, #ffffff);
  font-size: var(--font-size-7);
  font-weight: 500;
  font-family: var(--font-family);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
}

.btn-primary:active:not(:disabled) {
  background: var(--color-primary-dark);
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  display: inline-block;
  min-height: 32px;
  padding: var(--space-xs) var(--space-lg);
  background: transparent;
  color: var(--color-primary);
  font-size: var(--font-size-main);
  font-weight: 500;
  font-family: var(--font-family);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--color-primary-light);
}

/* ============================
   Error Messages
   ============================ */
.error-msg {
  color: var(--color-error);
  font-size: var(--font-size-5);
  margin-top: var(--space-sm);
  min-height: 20px;
}

/* ============================
   QR Result Card
   ============================ */
.qr-card {
  text-align: center;
}

.qr-container {
  display: inline-block;
  padding: var(--space-md);
  background: var(--adm-color-white, #ffffff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin: var(--space-md) 0;
}

.qr-container img,
.qr-container canvas {
  display: block;
}

.qr-url {
  word-break: break-all;
  font-size: var(--font-size-3);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  margin: var(--space-sm) 0;
}

.countdown-section {
  margin: var(--space-md) 0;
  font-size: var(--font-size-main);
}

.countdown-label {
  color: var(--color-text-secondary);
}

.countdown-timer {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  font-size: var(--font-size-lg);
}

/* ============================
   Scan View — Full-screen, no scroll
   ============================ */
.scan-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--space-lg);
  padding-top: calc(var(--space-lg) + env(safe-area-inset-top, 0px));
  padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
  background: var(--color-bg);
}

.scan-state {
  width: 100%;
  max-width: 500px;
  text-align: center;
}

/* Loading spinner */
.spinner {
  width: 36px;
  height: 36px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  animation: spin 0.8s linear infinite;
}

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

/* Scan header */
.scan-header {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-high);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.3px;
}

/* Allergen list in scan view */
.scan-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.scan-allergen {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  text-align: left;
  min-height: 52px;
  transition: transform var(--transition-fast);
}

.scan-allergen[data-severity="high"] {
  background: var(--color-high-bg);
  border-left: 4px solid var(--color-high);
}

.scan-allergen[data-severity="moderate"] {
  background: var(--color-moderate-bg);
  border-left: 4px solid var(--color-moderate);
}

.scan-allergen[data-severity="low"] {
  background: var(--color-low-bg);
  border-left: 4px solid var(--color-low);
}

.scan-allergen-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.scan-allergen-name {
  flex: 1;
  font-size: var(--font-size-main);
  font-weight: 600;
  color: var(--color-text);
}

/* Severity tags — antd-mobile pill-shaped badges */
.scan-allergen-badge {
  font-size: var(--font-size-3);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
  line-height: 1.4;
  transition: transform var(--transition-fast);
}

.scan-allergen-badge[data-severity="high"] {
  background: var(--color-high);
  color: var(--adm-color-white, #ffffff);
}

.scan-allergen-badge[data-severity="moderate"] {
  background: var(--color-moderate);
  color: var(--adm-color-white, #ffffff);
}

.scan-allergen-badge[data-severity="low"] {
  background: var(--color-low);
  color: #000000;
}

/* Warnings in scan view */
.scan-warnings {
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-error-bg);
  border-radius: var(--radius-md);
}

.scan-warning {
  font-size: var(--font-size-main);
  font-weight: 600;
  color: var(--color-high);
  margin-bottom: var(--space-xs);
}

.scan-warning:last-child {
  margin-bottom: 0;
}

/* Emergency contact in scan view */
.scan-contact {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
}

.scan-contact-icon {
  font-size: 22px;
}

.scan-contact-label {
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* Timer in scan view */
.scan-timer {
  margin-top: var(--space-md);
  font-size: var(--font-size-5);
  color: var(--color-text-muted);
}

.scan-countdown {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Expired / Not Found states */
.scan-expired-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-error);
  margin-bottom: var(--space-md);
}

.scan-expired-text {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.scan-notfound-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* ============================
   Footer
   ============================ */
.app-footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
  font-size: var(--font-size-3);
  color: var(--color-text-muted);
}

/* ============================
   Print Styles — Wallet Card
   ============================ */
@media print {
  body {
    background: #ffffff;
    color: #000000;
  }

  .app-header,
  .app-footer,
  #generate-btn,
  #copy-url-btn,
  .countdown-section,
  .actions-card,
  #passphrase-heading,
  .input-group,
  .expiry-selector,
  .creator-main section:not(.qr-card) {
    display: none !important;
  }

  .creator-main {
    max-width: 100%;
    padding: 0;
  }

  .qr-card {
    display: block !important;
    border: 2px solid #000000;
    page-break-inside: avoid;
    padding: 12mm;
  }

  .qr-container {
    border: 2px solid #000000;
  }

  .qr-container canvas {
    width: 80mm !important;
    height: 80mm !important;
  }

  /* Scan view print */
  .scan-container {
    min-height: auto;
    padding: 12mm;
  }

  .scan-allergen {
    border: 1px solid #000000;
  }

  .scan-warnings {
    border: 2px solid #000000;
  }

  .scan-contact {
    border: 2px solid #000000;
    background: #f5f5f5;
  }
}

/* ============================
   Utility: safe area padding for notched devices
   ============================ */
@supports (padding: env(safe-area-inset-bottom)) {
  .creator-main {
    padding-bottom: calc(80px + env(safe-area-inset-bottom));
  }
}