/* ===================================================
   VARIABLES
   =================================================== */
:root {
  /* Colors */
  --color-background: #f8fafc;
  --color-text: #1a202c;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #22c55e;
  --color-warning: #f59e42;
  --color-danger: #ef4444;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-600: #4b5563;
  --color-neutral-800: #1f2937;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', Arial, sans-serif;
  --font-mono: 'Fira Mono', monospace;
  --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: 2rem;     /* 32px */
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-loose: 1.8;

  /* Spacing (scale: 0–96px) */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 8px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.20);

  /* Transition Durations */
  --duration-fast: 120ms;
  --duration-base: 240ms;
  --duration-slow: 400ms;
}

/* ===================================================
   RESET / NORMALIZE
   =================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  scroll-behavior: smooth;
}

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

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

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

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

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

/* ===================================================
   BASE STYLES
   =================================================== */

body {
  letter-spacing: 0.01em;
  background-color: var(--color-background);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-tight);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
h2 {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-tight);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
h4 {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--space-2);
}
h5 {
  font-size: var(--font-size-base);
  font-weight: 500;
}
h6 {
  font-size: var(--font-size-sm);
  font-weight: 500;
}
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  margin-top: 0;
}
p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-loose);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-base) cubic-bezier(.4,0,.2,1);
}
a:hover, a:focus-visible {
  color: var(--color-primary-hover);
  outline: none;
}
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===================================================
   UTILITIES
   =================================================== */

.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.flex {
  display: flex;
}
.flex-row {
  flex-direction: row;
}
.flex-col {
  flex-direction: column;
}
.flex-center {
  justify-content: center;
  align-items: center;
}
.grid {
  display: grid;
}
.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}

.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
   =================================================== */

.button, button, [type="button"], [type="submit"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--duration-base), box-shadow var(--duration-base);
}
.button:hover,
button:hover, [type="button"]:hover, [type="submit"]:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}
.button:focus-visible,
button:focus-visible, [type="button"]:focus-visible, [type="submit"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.button:disabled,
button:disabled, [type="button"]:disabled, [type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--color-neutral-200);
  color: var(--color-neutral-400);
}

input, textarea, select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--duration-base);
  font-size: var(--font-size-base);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.11);
}
input:disabled, textarea:disabled, select:disabled {
  background: var(--color-neutral-100);
  color: var(--color-neutral-400);
  cursor: not-allowed;
}

.card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

/* ===================================================
   HEADER & FOOTER STYLES (Shared)
   =================================================== */

.main-header {
  background: #fff;
  border-bottom: 1px solid var(--color-neutral-200);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.site-logo {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
}
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: var(--space-4);
}
.menu-bar {
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--duration-base);
}
.nav-menu {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}
.nav-menu a {
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  padding: 6px 12px;
  color: var(--color-neutral-800);
  border-radius: var(--radius-sm);
  transition: background var(--duration-base);
}
.nav-menu a:hover, .nav-menu a:focus-visible {
  background: var(--color-neutral-100);
  color: var(--color-primary);
}

/* Responsive nav menu for mobile */
@media (max-width: 700px) {
  .nav-menu {
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: var(--space-4) 0;
    box-shadow: 0 8px 24px rgba(16,24,40,0.1);
    display: none;
    z-index: 51;
  }
  .nav-menu.active {
    display: flex;
  }
  .mobile-menu-toggle {
    display: flex;
  }
}

.main-footer {
  background: var(--color-neutral-100);
  border-top: 1px solid var(--color-neutral-200);
  padding: var(--space-8) 0 var(--space-4) 0;
  margin-top: var(--space-16);
}
.footer-flex {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
}
.footer-brand {
  font-size: var(--font-size-xl);
  font-weight: 900;
  color: var(--color-primary);
}
.footer-nav ul, .footer-legal ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-nav a, .footer-legal a {
  color: var(--color-neutral-800);
  text-decoration: none;
  font-size: var(--font-size-base);
  transition: color var(--duration-base);
}
.footer-nav a:hover, .footer-legal a:hover {
  color: var(--color-primary);
}
.footer-copyright {
  margin-top: var(--space-4);
  font-size: var(--font-size-sm);
  text-align: center;
  color: var(--color-neutral-600);
}

@media (max-width: 800px) {
  .footer-flex {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
  }
}

/* ===================================================
   COOKIE CONSENT BANNER (Shared)
   =================================================== */

.cookie-consent-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  background: var(--color-neutral-800);
  color: #fff;
  padding: var(--space-4);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 -4px 24px rgba(31,41,55,0.06);
  opacity: 1;
  pointer-events: auto;
  transition: opacity var(--duration-base);
}
.cookie-consent-banner[hidden] {
  opacity: 0;
  pointer-events: none;
}
.cookie-consent-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}
.cookie-btn {
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  padding: 8px 20px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
}
.cookie-reject {
  background: var(--color-neutral-400);
  color: #1a202c;
}
.cookie-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================================================
   ACCESSIBILITY
   =================================================== */

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

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