/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
  /* Colours */
  --color-primary: #0284C7;
  --color-accent: #EA580C;
  --color-accent-hover: #C2410C;
  --color-text-dark: #334155;
  --color-bg-neutral: #F8FAFC;
  --color-surface-neutral: #E2E8F0;
  --color-white: #FFFFFF;
  --color-error: #EF4444;
  --color-success: #10B981;
  --color-disabled-bg: #CBD5E1;
    --color-disabled-text: #94A3B8;
  --color-blue-light: #F0F9FF;
  --color-gray-border: #94A3B8;
  --color-blue-focus: #BFDBFE;

  /* Typography */
  --font-heading: 'Nunito', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --font-size-h1: 2rem;
  --font-size-h2: 1.5rem;
  --font-size-h3: 1.25rem;
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;

  --line-height-body: 1.6;
  --line-height-heading: 1.25;

  /* Spacing */
    --spacing-xs: 0.25rem;
  --spacing-btn-y: 0.75rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-section: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;

  /* Layout */
  --max-width: 1200px;
  --padding-x: 1rem;
}

@media (min-width: 768px) {
  :root {
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    --padding-x: 2rem;
  }
}

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

body, h1, h2, h3, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

img, picture {
  max-width: 100%;
  display: block;
  height: auto;
}

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

/* ==========================================================================
   Base Typography
   ========================================================================== */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-dark);
  background-color: var(--color-bg-neutral);
}

h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  color: var(--color-text-dark);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover, a:focus {
  text-decoration: underline;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--padding-x);
  padding-right: var(--padding-x);
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-btn-y) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn:focus-visible {
  outline: 2px solid var(--color-text-dark);
  outline-offset: 2px;
}

.btn:disabled {
  background-color: var(--color-disabled-bg);
  color: var(--color-disabled-text);
  cursor: not-allowed;
  border-color: transparent;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  text-decoration: none;
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-blue-light);
  text-decoration: none;
}

/* ==========================================================================
   Form Fields
   ========================================================================== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-small);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-dark);
}

.form-control {
  width: 100%;
  padding: var(--spacing-btn-y);
  border: 1px solid var(--color-gray-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  color: var(--color-text-dark);
  transition: border-color 0.2s;
}

.form-control::placeholder {
  color: var(--color-gray-border);
}

.form-control:focus {
  outline: 2px solid var(--color-blue-focus);
  border-color: var(--color-primary);
}

.form-control.is-invalid {
  border-color: var(--color-error);
}

.form-control.is-valid {
  border-color: var(--color-success);
}

/* ==========================================================================
   HOMEPAGE SPECIFIC STYLES
   ========================================================================== */

/* Header */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-surface-neutral);
  padding: var(--spacing-md) 0;
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
  text-align: center;
}

.logo a {
  font-family: var(--font-heading);
  font-size: var(--font-size-h3);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.logo a:hover {
  text-decoration: none;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
}

.main-nav a {
  color: var(--color-text-dark);
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Utilities */
.text-center { text-align: center; }
.bg-white { background-color: var(--color-white); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Hero Section */
.hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.hero-content {
  flex: 1;
}

.hero-image {
  flex: 1;
}

.hero-image img {
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
}

@media (min-width: 768px) {
  .hero-inner {
    flex-direction: row;
    align-items: center;
  }
}

/* Section Header */
.section-header {
  max-width: 800px;
  margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Card */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-surface-neutral);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.card h3 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-dark);
}

/* Footer */
.site-footer {
  background-color: var(--color-text-dark);
  color: var(--color-bg-neutral);
  padding: var(--spacing-xl) 0;
}

/* ==========================================================================
   INTERNAL PAGES SPECIFIC STYLES
   ========================================================================== */

/* Page Header */
.page-header {
  padding-top: var(--spacing-section);
  padding-bottom: calc(var(--spacing-section) / 2);
}

/* Content Grid */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

@media (min-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.content-image img {
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* Typography Utilities */
.w-100 {
  width: 100%;
}
.mt-lg {
  margin-top: var(--spacing-lg);
}

.numbered-list, .bullet-list {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.numbered-list {
  list-style-type: decimal;
}

.bullet-list {
  list-style-type: disc;
}

.numbered-list li, .bullet-list li {
  margin-bottom: var(--spacing-sm);
}

/* ==========================================================================
   MOBILE NAVIGATION
   ========================================================================== */
.mobile-menu-btn {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-surface-neutral);
  color: var(--color-text-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  margin-top: var(--spacing-sm);
}

.main-nav {
  display: none;
  width: 100%;
}

.main-nav.is-open {
  display: block;
}

.main-nav ul {
  flex-direction: column;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
  
  .main-nav {
    display: block !important;
    width: auto;
  }
  
  .main-nav ul {
    flex-direction: row;
  }
}