/* =========================
   Variables
   ========================= */
:root {
  /* Color Palette */
  --color-background: #f9fafb;
  --color-surface: #ffffff;
  --color-text: #1a202c;
  --color-primary: #3366ff;
  --color-primary-hover: #254eda;
  --color-success: #22c55e;
  --color-warning: #fbbf24;
  --color-danger: #ef4444;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', Arial, sans-serif;
  --font-heading: 'Inter', 'Segoe UI', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-loose: 1.7;

  /* Spacing Scale (0-96px) */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* Radii, Shadow, Transitions */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(16,30,54,0.06);
  --shadow-md: 0 4px 12px rgba(16,30,54,0.10);
  --shadow-lg: 0 8px 24px rgba(16,30,54,0.12);
  --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================
   Reset / Normalize
   ========================= */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  background: var(--color-background);
}
*, *::before, *::after {
  box-sizing: inherit;
}
body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}
ul, ol {
  list-style: none;
}
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
input, button, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}
button, input[type="submit"] {
  cursor: pointer;
  background: none;
}
iframe {
  border: 0;
}

/* =========================
   Base Styles
   ========================= */
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-background);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--line-height-tight);
}
h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-6);
}
h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}
h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}
h4, h5, h6 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-2);
}
p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-normal);
}
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-normal);
}
a:hover, a:active {
  color: var(--color-primary-hover);
}
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* =========================
   Utilities
   ========================= */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}
.flex {
  display: flex;
}
.flex-center {
  align-items: center;
  justify-content: center;
}
.flex-col {
  flex-direction: column;
}
.grid {
  display: grid;
}
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* =========================
   Components
   ========================= */
.button,
button,
input[type="submit"] {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-md);
  font-weight: 500;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  border: none;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.button:hover,
button:hover,
input[type="submit"]:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}
.button:focus-visible,
button:focus-visible,
input[type="submit"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.button:disabled,
button:disabled,
input[type="submit"][disabled] {
  background: var(--color-gray-300);
  color: var(--color-gray-600);
  cursor: not-allowed;
  box-shadow: none;
}
input, textarea, select {
  display: block;
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(51,102,255,0.12);
  outline: none;
}
input:disabled, textarea:disabled, select:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
  cursor: not-allowed;
}
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

/* =========================
   Header & Footer styles
   ========================= */
.site-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0; left: 0; right: 0;
  z-index: 10;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
}
.nav-menu {
  display: flex;
  gap: var(--space-6);
}
.nav-menu li a {
  font-weight: 500;
  color: var(--color-gray-700);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.nav-menu li a:hover,
.nav-menu li a:focus {
  background: var(--color-primary);
  color: #fff;
}
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  margin-left: var(--space-4);
}
.menu-bar {
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  display: block;
}

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-gray-200);
  margin-top: 0;
  position: relative;
  z-index: 1;
  padding-bottom: 68px;
}
.footer-main {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-10);
  padding: var(--space-10) 0 var(--space-4) 0;
}
.footer-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-nav a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}
.footer-nav a:hover {
  text-decoration: underline;
  color: var(--color-primary-hover);
}
.footer-legal ul {
  display: flex;
  flex-direction: row;
  gap: var(--space-6);
  margin-bottom: var(--space-2);
}
.footer-legal a {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  text-decoration: none;
}
.footer-legal a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}
.copyright {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* Cookie Consent Banner */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  width: 100%;
  z-index: 1000;
  background: var(--color-gray-900);
  color: #fff;
  box-shadow: 0 -2px 12px rgba(16,30,54,0.14);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: var(--font-size-sm);
  padding: var(--space-3) var(--space-2);
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1);
}
.cookie-banner[aria-hidden="true"] {
  transform: translateY(120%);
  pointer-events: none;
}
.cookie-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: flex-start;
}
.cookie-actions {
  display: flex;
  gap: var(--space-3);
}
#cookie-accept.button {
  background: var(--color-success);
  color: #fff;
}
#cookie-accept.button:hover {
  background: #16a34a;
}
#cookie-decline {
  background: none;
  color: var(--color-gray-50);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-6);
  font-weight: 500;
  transition: color 0.2s, border 0.2s, background 0.2s;
}
#cookie-decline:hover {
  background: var(--color-gray-600);
  color: #fff;
  border-color: var(--color-danger);
}

/* Responsive adjustments for header/footer/cookie */
@media (max-width: 900px) {
  .footer-main {
    flex-direction: column;
    gap: var(--space-6);
    align-items: stretch;
  }
}
@media (max-width: 680px) {
  .nav-menu {
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    box-shadow: var(--shadow-md);
    padding: var(--space-6) var(--space-4);
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-wrapper {
    position: relative;
  }
  .site-header {
    box-shadow: var(--shadow-md);
  }
}
@media (max-width: 480px) {
  .site-logo,
  .footer-brand {
    font-size: var(--font-size-lg);
  }
}

/* =========================
   Accessibility
   ========================= */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}