:root {
  /* Colors */
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-primary: #1d4ed8; /* deep travel-inspired blue */
  --color-primary-soft: #e0ebff;
  --color-primary-dark: #1e40af;
  --color-accent: #f97316; /* vibrant, energetic accent */
  --color-success: #16a34a;
  --color-warning: #facc15;
  --color-danger: #dc2626;

  /* Neutral grays */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --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 */

  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --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 */
  --space-24: 6rem;    /* 96px */

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

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.14);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 240ms ease-out;

  /* Layout */
  --container-max: 1120px;
}

/*
 * RESET / NORMALIZE
 * Modern baseline for consistent rendering
 */

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

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  padding: 0;
}

a {
  color: inherit;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

blockquote,
figure {
  margin: 0;
}

/*
 * BASE STYLES
 * Clean, trustworthy e-commerce foundation
 */

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--text-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--text-2xl);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--text-lg);
}

h6 {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

strong {
  font-weight: 600;
}

small {
  font-size: var(--text-sm);
}

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

a:hover {
  color: var(--color-primary-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: var(--space-6) 0;
}

/*
 * ACCESSIBILITY
 */

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/*
 * UTILITIES
 * Layout helpers & reusable patterns
 */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Flex helpers */

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

/* Grid helpers */

.grid {
  display: grid;
}

.grid-center {
  display: grid;
  place-items: center;
}

.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
}

/* Spacing utilities (minimal set) */

.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-sm {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.section-lg {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* Screen reader only */

.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;
}

/*
 * COMPONENTS
 * Buttons, form controls, cards
 */

.button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    border-color var(--transition-base);
}

.button--primary,
.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.button--accent,
.btn--accent {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.button--ghost,
.btn--ghost {
  background-color: transparent;

  border-color: var(--gray-300);
  box-shadow: none;
}

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

.button--accent:hover,
.btn--accent:hover {
  background-color: #ea580c;
}

.button--ghost:hover,
.btn--ghost:hover {
  background-color: var(--gray-50);
}

.button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.button:disabled,
.btn:disabled,
.button[aria-disabled="true"],
.btn[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none;
  transform: none;
}

/* Inputs and form controls */

.input,
select,
textarea,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="search"],
input[type="url"] {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: #ffffff;
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  color: var(--color-text);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.input:focus-visible,
select:focus-visible,
textarea:focus-visible,
input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="password"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="number"]:focus-visible,
input[type="search"]:focus-visible,
input[type="url"]:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft), var(--shadow-sm);
}

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

label {
  display: inline-block;
  margin-bottom: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

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

.form-helper {
  margin-top: 0.25rem;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: 0.25rem;
  font-size: var(--text-xs);
  color: var(--color-danger);
}

/* Card component: used for product tiles, info blocks, etc. */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
  border: 1px solid rgba(15, 23, 42, 0.03);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.18);
  transform: translateY(-3px);
}

.card-header {
  margin-bottom: var(--space-3);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.card-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.card-actions {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* Badges / pills (e.g., stock status, shipping info) */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.badge--success {
  background-color: rgba(22, 163, 74, 0.08);
  color: #166534;
  border-color: rgba(22, 163, 74, 0.2);
}

.badge--warning {
  background-color: rgba(250, 204, 21, 0.08);
  color: #854d0e;
  border-color: rgba(250, 204, 21, 0.2);
}

.badge--danger {
  background-color: rgba(220, 38, 38, 0.08);
  color: #b91c1c;
  border-color: rgba(220, 38, 38, 0.2);
}

/* Subtle top bar style for trust signals (delivery, support, returns, etc.) */

.topbar {
  background: linear-gradient(90deg, #020617, #0b1f3a);
  color: #e5e7eb;
  font-size: var(--text-xs);
  padding: 0.5rem 0;
}

.topbar a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

/*
 * END BASE
 */