/* ========================
   VARIABLES
   ======================== */
:root {
  /* Colors */
  --color-background: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #23272f;
  --color-primary: #2563eb;
  --color-primary-hover: #1e40af;
  --color-success: #22c55e;
  --color-warning: #facc15;
  --color-danger: #ef4444;
  --color-neutral-100: #f5f7fa;
  --color-neutral-200: #e4e8ed;
  --color-neutral-300: #cfd7df;
  --color-neutral-400: #a8b1bb;
  --color-neutral-500: #6b7280;
  --color-neutral-900: #23272f;

  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', Arial, sans-serif;
  --font-mono: 'Fira Mono', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --line-height-tight: 1.15;
  --line-height-normal: 1.6;
  --line-length: 65ch;

  /* Spacing (0, 4, 8, 12, 16, 24, 32, 48, 64, 96) */
  --space-0: 0px;
  --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, Shadow, Transition */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(35, 39, 47, 0.04);
  --shadow-md: 0 4px 12px rgba(35, 39, 47, 0.10);
  --transition-fast: 0.15s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ========================
   RESET AND NORMALIZE
   ======================== */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
*, *::before, *::after {
  box-sizing: inherit;
}
body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, figure {
  margin: 0;
  padding: 0;
}
ul, ol {
  list-style: none;
}
img, svg, video, canvas, audio, iframe, embed, object {
  display: block;
  max-width: 100%;
  height: auto;
}
input, button, textarea, select {
  font: inherit;
  margin: 0;
  border: none;
  background: none;
  color: inherit;
  outline: none;
}
a {
  text-decoration: none;
  color: inherit;
}
button, [type="button"], [type="submit"], [role="button"] {
  cursor: pointer;
}
[hidden] { display: none !important; }

/* ========================
   BASE STYLES
   ======================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-background);
  line-height: var(--line-height-normal);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-top: var(--space-8);
  margin-bottom: var(--space-2);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

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

a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
  outline: none;
}
a:hover,
a:active {
  color: var(--color-primary-hover);
}
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ========================
   UTILITIES
   ======================== */
.container {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  width: 100%;
}
.flex {
  display: flex;
}
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.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;
  border: 0 !important;
  white-space: nowrap !important;
}

/* ========================
   COMPONENTS
   ======================== */
.button {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: none;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}
.button:hover, .button:focus-visible {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.button:disabled, .button[aria-disabled="true"] {
  opacity: 0.6;
  background: var(--color-neutral-300);
  color: var(--color-neutral-500);
  cursor: not-allowed;
  box-shadow: none;
}

input, textarea, select {
  width: 100%;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-neutral-300);
  margin-bottom: var(--space-4);
  transition: border-color var(--transition-fast);
}
input:focus-visible, textarea:focus-visible, select:focus-visible {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}
input:disabled, textarea:disabled, select:disabled {
  background: var(--color-neutral-200);
  color: var(--color-neutral-400);
  cursor: not-allowed;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  transition: box-shadow var(--transition-fast);
}
.card:hover, .card:focus-within {
  box-shadow: 0 8px 20px rgba(35,39,47,0.14);
}

/* ========================
   HEADER & FOOTER STYLES
   ======================== */
.site-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 40;
}
.site-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  display: flex;
  align-items: center;
  color: var(--color-primary);
  padding: var(--space-2) 0;
}
.logo-icon {
  margin-right: var(--space-2);
  font-size: var(--font-size-xl);
}
.main-menu {
  display: flex;
  gap: var(--space-6);
  font-size: var(--font-size-base);
}
.main-menu li {
  margin: 0;
}
.menu-toggle {
  background: none;
  border: none;
  padding: var(--space-2);
  display: none;
  align-items: center;
  justify-content: center;
}
.menu-bars {
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  display: block;
  position: relative;
  border-radius: 3px;
}
.menu-bars::before, .menu-bars::after {
  content: "";
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px;
  position: absolute;
  left: 0;
  transition: transform var(--transition-fast);
}
.menu-bars::before {
  top: -8px;
}
.menu-bars::after {
  top: 8px;
}
@media (max-width: 800px) {
  .main-menu {
    display: none;
    flex-direction: column;
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    position: absolute;
    top: 62px;
    right: 0;
    width: 210px;
    padding: var(--space-4);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    z-index: 41;
  }
  .main-menu.active {
    display: flex;
  }
  .menu-toggle {
    display: flex;
  }
}

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-neutral-200);
  margin-top: var(--space-16);
  padding: var(--space-8) 0 var(--space-12) 0;
}
.footer-content {
  flex-wrap: wrap;
  gap: var(--space-8);
}
.footer-brand {
  min-width: 170px;
  font-size: var(--font-size-base);
  color: var(--color-primary);
}
.footer-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}
.copyright {
  font-size: var(--font-size-xs);
  color: var(--color-neutral-400);
  margin-top: var(--space-2);
}
.footer-nav ul, .footer-legal ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.footer-nav a,.footer-legal a {
  color: var(--color-neutral-500);
  font-size: var(--font-size-sm);
}
.footer-nav a:hover,.footer-legal a:hover {
  color: var(--color-primary-hover);
}
.footer-legal {
  min-width: 160px;
}
@media (max-width: 650px) {
  .footer-content {
    flex-direction: column;
    gap: var(--space-6);
  }
}

/* ========================
   COOKIE CONSENT BANNER
   ======================== */
.cookie-consent {
  position: fixed;
  bottom: 0;
  width: 100vw;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 -2px 20px rgba(35,39,47,0.09);
  z-index: 100;
  padding: var(--space-4) 0;
  font-size: var(--font-size-sm);
  display: none;
}
.cookie-consent.visible {
  display: block;
}
.cookie-container {
  max-width: 960px;
  margin: 0 auto;
  gap: var(--space-6);
}
.cookie-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.button-secondary {
  background: var(--color-neutral-200);
  color: var(--color-primary);
}
.button-secondary:hover, .button-secondary:focus-visible {
  background: var(--color-primary);
  color: #fff;
}
@media (max-width: 480px) {
  .cookie-container {
    flex-direction: column;
    gap: var(--space-2);
  }
}

/* ========================
   ACCESSIBILITY & MOTION
   ======================== */
: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;
    scroll-behavior: auto !important;
  }
}