/* ================================
   ASNA Tropicals - Design System
   Modern, Elegant, Boutique Aquatics
   ================================ */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ================================
   CSS Variables (Design Tokens)
   ================================ */

:root {
  /* Colors - Light Mode */
  --color-primary: #005F73;
  --color-secondary: #0A9396;
  --color-accent: #EE9B00;
  --color-background: #F8F9FA;
  --color-surface: #FFFFFF;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #64748B;
  --color-border: #E2E8F0;
  --color-success: #22C55E;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  /* Informational / medium stock */
  --color-info: #06b6d4;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */
  --text-6xl: 3.75rem;     /* 60px */

  /* Spacing */
  --space-1: 0.25rem;      /* 4px */
  --space-2: 0.5rem;       /* 8px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --color-primary: #0A9396;
  --color-secondary: #005F73;
  --color-accent: #FFB703;
  --color-background: #0F172A;
  --color-surface: #1E293B;
  --color-text-primary: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-border: #334155;
  /* Dark mode info color */
  --color-info: #38bdf8;
}

/* ================================
   Base Resets
   ================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

/* ================================
   Container & Layout
   ================================ */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: var(--container-lg);
}

.container-wide {
  max-width: var(--container-2xl);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background-color: #D88A00;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

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

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* ================================
   Forms
   ================================ */

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 95, 115, 0.1);
}

/* ================================
   Accessibility - Focus Styles
   ================================ */

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Remove focus outline for mouse users */
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

/* Skip to main content link (for screen readers and keyboard users) */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  font-weight: 600;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-to-content:focus {
  top: 0;
}

/* Screen reader only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus indicator for custom interactive elements */
.focusable:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  color: var(--color-text-primary);
}

/* ================================
   Utilities
   ================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ================================
   Responsive Breakpoints
   ================================ */

/* Tablet and up */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
}

/* Mobile */
@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* Desktop medium and up - 2 columns */
@media (min-width: 769px) {
  .grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop large and up - 3 columns */
@media (min-width: 1024px) {
  .grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ================================
   Cart Icon (site-wide)
   ================================ */

.cart-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.cart-btn:hover,
.cart-btn-active {
  background-color: var(--color-primary);
  color: white;
}

.cart-count-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* ================================
   Fish Card Cart Buttons
   ================================ */

.fish-card-actions {
  padding: 0 var(--space-4) var(--space-4);
}

.btn-card-cart,
.btn-card-notify {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-card-cart {
  background-color: var(--color-primary);
  color: white;
}

.btn-card-cart:hover {
  background-color: var(--color-secondary);
  transform: translateY(-1px);
}

.btn-card-cart.added {
  background-color: var(--color-success);
}

.btn-card-notify {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
}

.btn-card-notify:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Notify Me inline form */
.notify-form-inline {
  margin-top: var(--space-2);
  padding: var(--space-3);
  background: var(--color-background);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.notify-form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.notify-form-row {
  display: flex;
  gap: var(--space-2);
}

.notify-email-input {
  flex: 1;
  min-width: 0;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.btn-notify-submit {
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.notify-form-msg {
  font-size: var(--text-xs);
  margin-top: var(--space-2);
}

/* ================================
   Detail Page: Cart Row + Qty Stepper
   ================================ */

.detail-cart-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.qty-stepper {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.qty-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 44px;
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
}

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

.qty-input {
  width: 52px;
  height: 44px;
  text-align: center;
  border: none;
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  font-size: var(--text-base);
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.qty-input::-webkit-inner-spin-button,
.qty-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.qty-input[type=number] { -moz-appearance: textfield; }

.btn-accent {
  background-color: var(--color-accent);
  color: white;
}

.btn-accent:hover {
  background-color: #D88A00;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background-color: var(--color-success) !important;
}

.detail-notify-form {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-background);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

/* ================================
   Checkout Page
   ================================ */

.checkout-page {
  padding: var(--space-12) 0 var(--space-20);
}

.checkout-empty {
  text-align: center;
  padding: var(--space-20) 0;
}

.checkout-empty-icon {
  margin-bottom: var(--space-6);
}

.checkout-empty h2 {
  margin-bottom: var(--space-3);
}

.checkout-empty p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .checkout-grid {
    grid-template-columns: 1fr 400px;
    align-items: start;
  }
}

/* Form sections */
.checkout-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-border);
}

.checkout-section-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
  color: var(--color-text-primary);
}

.checkout-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 95, 115, 0.12);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group select:invalid {
  border-color: var(--color-danger);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.required {
  color: var(--color-danger);
}

.field-error {
  font-size: var(--text-sm);
  color: var(--color-danger);
  margin-top: var(--space-2);
}

/* DOA Policy box */
.checkout-section-policy .policy-box {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.checkout-section-policy .policy-box h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.checkout-section-policy .policy-box ul {
  margin-left: var(--space-5);
  margin-bottom: var(--space-3);
}

.checkout-section-policy .policy-box li {
  margin-bottom: var(--space-1);
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.checkbox-custom { display: none; }

/* Submit */
.btn-full { width: 100%; }

.form-error-banner {
  padding: var(--space-4);
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-md);
  color: var(--color-danger);
  margin-bottom: var(--space-4);
}

[data-theme="dark"] .form-error-banner {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
}

.submit-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-3);
}

/* Summary Card */
.checkout-summary-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  position: sticky;
  top: 100px;
}

.checkout-summary-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.summary-items {
  margin-bottom: var(--space-5);
}

.summary-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.summary-item:last-child { border-bottom: none; }

.summary-item-img {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  object-fit: cover;
  flex-shrink: 0;
}

.summary-item-img-placeholder {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-background);
  flex-shrink: 0;
}

.summary-item-info {
  flex: 1;
  min-width: 0;
}

.summary-item-name {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.summary-item-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.summary-item-price {
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
}

/* Summary qty stepper */
.summary-qty-stepper {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.qty-mini-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.qty-mini-btn:hover { background: var(--color-background); }

.summary-qty {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  font-size: var(--text-sm);
  font-weight: 600;
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  padding: 0 4px;
}

.summary-remove-btn {
  background: none;
  border: none;
  font-size: var(--text-xs);
  color: var(--color-danger);
  cursor: pointer;
  padding: 2px 4px;
}

.summary-remove-btn:hover { text-decoration: underline; }

/* Shipping rows */
.summary-shipping-section {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.shipping-tier-tag {
  display: none;
  padding: 2px 8px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 700;
  margin-left: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.summary-total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-lg);
  font-weight: 700;
  padding-top: var(--space-3);
  border-top: 2px solid var(--color-border);
  margin-top: var(--space-2);
}

.shipping-tiers-info {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.shipping-tiers-heading {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.shipping-tier-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  padding: var(--space-1) 0;
}

.edit-cart-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
}

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

/* ================================
   Order Status Page
   ================================ */

.order-status-page {
  padding: var(--space-12) 0 var(--space-20);
}

.os-loading {
  text-align: center;
  padding: var(--space-20) 0;
  color: var(--color-text-secondary);
}

.os-not-found {
  text-align: center;
  padding: var(--space-20) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.os-not-found h2 { margin: 0; }
.os-not-found p  { color: var(--color-text-secondary); max-width: 420px; }

.os-card {
  max-width: 780px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* Banner */
.os-banner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-8);
  background: var(--color-background);
  border-bottom: 4px solid var(--color-primary);
}

.os-banner-icon {
  flex-shrink: 0;
}

.os-invoice-num {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

.os-status-label {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.os-status-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Expiry warning */
.os-expiry-warn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  background: #FEF3C7;
  color: #92400E;
  font-size: var(--text-sm);
  font-weight: 500;
}

[data-theme="dark"] .os-expiry-warn {
  background: rgba(245, 158, 11, 0.15);
  color: #FDE68A;
}

/* Body */
.os-body {
  padding: var(--space-6) var(--space-8);
}

.os-section {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.os-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.os-section-title {
  font-size: var(--text-base);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}

/* Timeline */
.os-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.os-timeline-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  position: relative;
}

.os-timeline-step:last-child { padding-bottom: 0; }

.os-timeline-step:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 20px;
  width: 2px;
  height: calc(100% - 8px);
  background: var(--color-border);
}

.os-timeline-step.active:not(:last-child)::before {
  background: var(--color-primary);
}

.os-timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
  margin-top: 2px;
  z-index: 1;
}

.os-timeline-step.active .os-timeline-dot {
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.os-timeline-step.current .os-timeline-dot {
  background: white;
  box-shadow: 0 0 0 3px var(--color-primary);
}

.os-timeline-label {
  font-size: var(--text-base);
  font-weight: 600;
}

.os-timeline-date {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* Payment */
.os-payment-box {
  background: var(--color-background);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.os-payment-intro {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
}

.os-pay-method {
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.os-pay-method:last-child { border-bottom: none; }

.os-pay-method h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.os-pay-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-border);
}

.os-pay-row:last-child { border-bottom: none; }
.os-pay-row span { color: var(--color-text-secondary); }
.os-pay-row strong { font-weight: 700; }

/* Items */
.os-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.os-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.os-item-img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.os-item-img-placeholder {
  width: 60px;
  height: 60px;
  background: var(--color-background);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.os-item-info { flex: 1; }

.os-item-name {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.os-item-qty {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.os-item-total {
  font-size: var(--text-base);
  font-weight: 700;
  flex-shrink: 0;
}

/* Address */
.os-address {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  white-space: pre-line;
}

/* Totals */
.os-totals {
  background: var(--color-background);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
}

.os-total-row {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
}

.os-total-final {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  border-top: 2px solid var(--color-border);
  margin-top: var(--space-2);
  padding-top: var(--space-3);
}

/* Notes */
.os-notes-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Footer note */
.os-footer-note {
  padding: var(--space-6) var(--space-8);
  background: var(--color-background);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.os-footer-note p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

/* spin animation used for submit loading */
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ================================
   Site Header
   ================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

[data-theme="dark"] .site-header {
  background-color: rgba(30, 41, 59, 0.95);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  gap: var(--space-6);
}

.header-brand { flex-shrink: 0; }

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-primary);
  transition: opacity var(--transition-fast);
}

.brand-link:hover { opacity: 0.8; }
.brand-icon { width: 32px; height: 32px; }

.brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover { color: var(--color-primary); }
.nav-link.active { color: var(--color-primary); }

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.social-icons { display: flex; gap: var(--space-3); }

.social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--color-primary);
  background-color: var(--color-background);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-background);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-primary);
  color: white;
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
}

/* ================================
   Page Header (teal gradient bar)
   ================================ */

.page-header {
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 800;
  color: white;
  margin-bottom: var(--space-4);
}

.page-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

/* ================================
   Site Footer
   ================================ */

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-20);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-heading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.footer-tagline {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-style: italic;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.footer-location {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  width: fit-content;
}

.footer-link:hover { color: var(--color-primary); }

.footer-social {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.footer-social-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  width: fit-content;
}

.footer-social-link:hover {
  color: var(--color-primary);
  transform: translateX(4px);
}

.footer-social-link svg { flex-shrink: 0; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-copyright {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-legal-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-legal-link:hover { color: var(--color-primary); }

.footer-divider {
  color: var(--color-border);
  font-size: var(--text-sm);
}

/* ================================
   Responsive — Mobile
   ================================ */

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-2);
    z-index: 999;
  }

  .main-nav.active { display: flex; }

  .nav-link {
    width: 100%;
    padding: var(--space-3);
    text-align: center;
  }

  .mobile-menu-toggle { display: flex; }
  .social-icons { display: none; }

  .page-title { font-size: var(--text-4xl); }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}


/* ================================
   Animations
   ================================ */

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-base);
}

.slide-up {
  animation: slideUp var(--transition-slow);
}

/* ================================
   Dark Mode Transition
   ================================ */

* {
  transition: background-color var(--transition-base),
              border-color var(--transition-base);
}

/* ================================
   Fish Detail Page Sections
   ================================ */

.info-section {
  margin-bottom: 2rem;
}

.info-section:last-child {
  margin-bottom: 0;
}

.section-heading {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.description-text {
  margin-bottom: 0.75rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.description-text:last-child {
  margin-bottom: 0;
}

.care-guide-item {
  margin-bottom: 0.5rem;
  padding-left: 1rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.care-guide-item:last-child {
  margin-bottom: 0;
}