/* =========================================================
   Variables
   ========================================================= */
:root {
  /* Color Palette - tuned for a clean, trustworthy transport brand */
  --color-background: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-text-muted: #6b7280;

  --color-primary: #1d4ed8; /* strong, reliable blue */
  --color-primary-soft: #e0ecff;
  --color-primary-dark: #16379b;

  --color-success: #059669;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;

  --color-border-subtle: #e5e7eb;
  --color-border-strong: #cbd5e1;

  /* 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-family-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-family-heading: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;

  --font-size-xs: 0.75rem;  /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem;   /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem;  /* 20px */
  --font-size-2xl: 1.5rem;  /* 24px */
  --font-size-3xl: 1.875rem;/* 30px */
  --font-size-4xl: 2.25rem; /* 36px */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-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;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --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, 0.12);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
}

/* =========================================================
   Reset / Normalize
   ========================================================= */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

h1, h2, h3, h4, h5, h6,
p, figure, blockquote,
dl, dd {
  margin: 0;
}

ul[role='list'],
ol[role='list'] {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
}

/* =========================================================
   Base Styles
   ========================================================= */
body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 60vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--gray-900);
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
}

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

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

p:last-child {
  margin-bottom: 0;
}

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

a {
  color: var(--color-primary);
  transition: color var(--transition-base);
}

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

strong {
  font-weight: 600;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}

/* =========================================================
   Accessibility & Motion
   ========================================================= */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 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;
}

/* =========================================================
   Layout Utilities
   ========================================================= */
.container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

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

.section--muted {
  background-color: var(--gray-50);
}

/* Flex helpers */
.flex {
  display: flex;
}

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

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

.flex-row {
  flex-direction: row;
}

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

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: var(--space-4);
}

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

/* Grid helpers */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Text utilities */
.text-center {
  text-align: center;
}

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

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

/* Spacing utilities (commonly used values) */
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.pt-6 { padding-top: var(--space-6); }
.pb-6 { padding-bottom: var(--space-6); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }

/* Width helpers */
.w-full {
  width: 100%;
}

/* =========================================================
   Components
   ========================================================= */

/* Buttons - primary call-to-action for booking / contact */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

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

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

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

.btn[disabled],
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* Inputs & Forms - booking / enquiry forms */
.input,
textarea,
select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: #ffffff;
  color: var(--color-text);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft);
}

.input[aria-invalid='true'],
textarea[aria-invalid='true'],
select[aria-invalid='true'] {
  border-color: var(--color-danger);
}

label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
}

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

/* Card - for service blocks, workflow steps, testimonials */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-subtle);
}

.card--muted {
  background-color: #ffffff;
}

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

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-1);
}

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

/* Tag / badge - useful to label services (Airport Transfer, Business, etc.) */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  background-color: var(--gray-100);
  color: var(--gray-700);
}

.badge-primary {
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

/* Alert - for important service notices (e.g., delays, COVID info) */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  border: 1px solid transparent;
}

.alert-info {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.alert-success {
  background-color: #ecfdf5;
  border-color: var(--color-success);
  color: #065f46;
}

.alert-warning {
  background-color: #fffbeb;
  border-color: var(--color-warning);
  color: #92400e;
}

.alert-danger {
  background-color: #fef2f2;
  border-color: var(--color-danger);
  color: #991b1b;
}

/* Navigation & Header helpers (generic, to be extended per-page) */
.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--font-size-sm);
}

.site-nav a {
  color: var(--gray-700);
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-primary-dark);
}

.site-nav a.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  background-color: #ffffff;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Hero - for main landing page messaging */
.hero {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.hero-heading {
  font-size: clamp(2.25rem, 3vw + 1rem, 3rem);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 32rem;
}

/* Step list - for booking workflow explanation */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

.step {
  position: relative;
  padding-left: var(--space-8);
}

.step-number {
  position: absolute;
  left: 0;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: var(--font-size-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Testimonial card */
.testimonial {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-subtle);
}

.testimonial-quote {
  font-style: italic;
  color: var(--color-text);
}

.testimonial-meta {
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Contact highlight - for phone / email callouts */
.contact-highlight {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  font-size: var(--font-size-sm);
}

.contact-highlight a {
  font-weight: 600;
}

/* Tables - for fare examples / scenarios */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table th,
.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  text-align: left;
}

.table thead th {
  font-weight: 600;
  color: var(--gray-700);
  background-color: var(--gray-50);
}

.table-striped tbody tr:nth-child(even) {
  background-color: var(--gray-50);
}

/* Responsive helpers */
@media (max-width: 640px) {
  .site-header-inner {
    /*flex-direction: column;*/
    /*align-items: flex-start;*/
    /*gap: var(--space-3);*/
  }

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