/* ===================================================================
   Variables
   =================================================================== */
:root {
  /* Color palette */
  --color-background: #f9fafd;
  --color-surface: #ffffff;
  --color-text: #232946;
  --color-primary: #3777ff;
  --color-success: #179b6b;
  --color-warning: #e3b234;
  --color-danger: #ed4f32;
  --color-neutral-100: #f4f6fb;
  --color-neutral-200: #e3e7ef;
  --color-neutral-300: #ccd3e1;
  --color-neutral-400: #a6afc7;
  --color-neutral-500: #6e768a;
  --color-neutral-700: #333a4f;
  --color-neutral-900: #15161b;

  /* Typography */
  --font-family-sans: 'Inter', 'Segoe UI', Arial, sans-serif;
  --font-family-serif: 'Merriweather', serif;
  --font-size-1: 0.875rem;   /* 14px */
  --font-size-2: 1rem;       /* 16px */
  --font-size-3: 1.25rem;    /* 20px */
  --font-size-4: 1.5rem;     /* 24px */
  --font-size-5: 2rem;       /* 32px */
  --line-height-tight: 1.25;
  --line-height-base: 1.6;
  --line-height-loose: 1.8;

  /* Spacing (0–96px, 0.25rem ~ 4px increments) */
  --space-0: 0px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-12: 64px;
  --space-16: 96px;

  /* Radius, shadows, transitions */
  --radius-xs: 2px;
  --radius-s: 4px;
  --radius-m: 8px;
  --radius-l: 16px;
  --shadow-xs: 0 1px 2px rgba(35,41,70,0.04);
  --shadow-m: 0 2px 8px rgba(35,41,70,0.08);
  --shadow-lg: 0 8px 32px rgba(35,41,70,0.14);
  --transition-fast: 120ms cubic-bezier(0.77,0,0.18,1);
  --transition-base: 200ms cubic-bezier(0.77,0,0.18,1);
  --transition-slow: 400ms cubic-bezier(0.77,0,0.18,1);
}

/* ===================================================================
   Reset & 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, figure, dl, dd {
  margin: 0;
}
ul[role='list'], ol[role='list'] {
  list-style: none;
}
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}
input, button, textarea, select {
  font: inherit;
}
button, [type='button'], [type='submit'] {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  cursor: pointer;
}
[tabindex="-1"]:focus {
  outline: none !important;
}

/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition: none !important;
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
  }
}

/* ===================================================================
   Base Styles
   =================================================================== */
body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-2);
  line-height: var(--line-height-base);
  background: var(--color-background);
  color: var(--color-text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
h1 {
  font-size: var(--font-size-5);
  margin-top: var(--space-6);
}
h2 {
  font-size: var(--font-size-4);
  margin-top: var(--space-5);
}
h3 {
  font-size: var(--font-size-3);
  margin-top: var(--space-4);
}
h4, h5, h6 {
  font-size: var(--font-size-2);
  margin-top: var(--space-4);
}
p, ul, ol, dl, blockquote {
  margin-bottom: var(--space-4);
}
ai, code, pre {
  font-family: 'JetBrains Mono', 'Fira Mono', monospace;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition-base);
}
a:hover, a:focus-visible {
  color: var(--color-neutral-900);
  outline: none;
}
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================================================================
   Utilities
   =================================================================== */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  max-width: 1100px;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.flex {
  display: flex;
}
.flex-center {
  align-items: center;
  justify-content: center;
}
.grid {
  display: grid;
}
.grid-gap {
  gap: var(--space-4);
}
.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;
}

/* Spacing utility classes */
.m-0    { margin: 0 !important; }
.mb-0   { margin-bottom: 0 !important; }
.mt-0   { margin-top: 0 !important; }
.p-0    { padding: 0 !important; }
.pb-0   { padding-bottom: 0 !important; }
.pt-0   { padding-top: 0 !important; }
.mt-4   { margin-top: var(--space-4) !important; }
.mb-4   { margin-bottom: var(--space-4) !important; }
.pt-4   { padding-top: var(--space-4) !important; }
.pb-4   { padding-bottom: var(--space-4) !important; }

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

/* Button styles */
.button,
button,
input[type="submit"],
input[type="button"] {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-m);
  font-size: var(--font-size-2);
  font-weight: 600;
  padding: var(--space-2) var(--space-5);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: background var(--transition-base),
              box-shadow var(--transition-fast),
              color var(--transition-fast);
}
.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background: var(--color-neutral-900);
  color: #fff;
}
.button:focus-visible,
button:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.button:disabled,
button:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled {
  opacity: 0.55;
  pointer-events: none;
  background: var(--color-neutral-300);
  color: var(--color-neutral-500);
}

/* Input styles */
input,
select,
textarea {
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-s);
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-2);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-primary);
  outline-offset: 0;
}
input:disabled,
select:disabled,
textarea:disabled {
  background: var(--color-neutral-200);
  color: var(--color-neutral-500);
  cursor: not-allowed;
}

/* Card component */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-m);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
  transition: box-shadow var(--transition-fast);
}
.card:hover, .card:focus-within {
  box-shadow: var(--shadow-lg);
}

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

/* Visually indicate focus, but respect reduced motion */
@media (prefers-reduced-motion: no-preference) {
  .button, button, input, select, textarea, a {
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
  }
}

/* ===================================================================
   Header & Footer styles
   =================================================================== */

/* Header styles */
.main-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
  position: sticky;
  top: 0;
  z-index: 99;
}
.header-row {
  min-height: 70px;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}
.site-logo {
  font-weight: 800;
  font-size: var(--font-size-4);
  text-decoration: none;
  color: var(--color-primary);
  letter-spacing: 1px;
}
.main-nav {
  position: relative;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius-s);
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin-left: var(--space-2);
}
.burger {
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-primary);
  box-shadow: 0 7px 0 0 var(--color-primary), 0 14px 0 0 var(--color-primary);
  border-radius: var(--radius-xs);
  transition: box-shadow var(--transition-base);
}
.nav-list {
  display: flex;
  gap: var(--space-5);
  padding-left: 0;
  margin: 0;
  align-items: center;
}
.nav-list a {
  font-size: var(--font-size-2);
  color: var(--color-neutral-900);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-s);
  transition: background var(--transition-fast);
}
.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--color-primary);
  color: #fff;
}

@media (max-width: 900px) {
  .header-row {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }
}
@media (max-width: 700px) {
  .nav-toggle {
    display: flex;
  }
  .nav-list {
    flex-direction: column;
    gap: var(--space-3);
    position: absolute;
    top: 100%;
    right: 0;
    left: auto;
    background: var(--color-surface);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-m);
    min-width: 220px;
    margin-top: var(--space-2);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity var(--transition-base), transform var(--transition-base);
    z-index: 10;
  }
  .main-nav.open .nav-list {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

/* Footer Styles */
.main-footer {
  background: var(--color-surface);
  padding: var(--space-8) 0 var(--space-4) 0;
  border-top: 1px solid var(--color-neutral-200);
}
.footer-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: flex-start;
  margin-bottom: var(--space-2);
}
.footer-brand {
  margin-bottom: var(--space-2);
}
.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.footer-list a {
  color: var(--color-primary);
  font-size: var(--font-size-1);
  text-decoration: underline;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-xs);
  transition: background var(--transition-fast);
}
.footer-list a:hover,
.footer-list a:focus-visible {
  background: var(--color-neutral-100);
  color: var(--color-neutral-900);
}
.copyright-row {
  text-align: center;
  color: var(--color-neutral-500);
  font-size: var(--font-size-1);
  margin-top: var(--space-5);
}
@media (min-width: 700px) {
  .footer-row {
    grid-template-columns: 1.5fr 3fr 2fr;
    gap: var(--space-12);
  }
}

/* Cookie Consent Styles */
.cookie-consent {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100vw;
  z-index: 110;
  background: rgba(255,255,255,0.98);
  border-top: 1px solid var(--color-neutral-200);
  box-shadow: 0 -1px 10px 2px rgba(35,41,70,0.08);
  padding: var(--space-3) 0;
  display: none;
}
.cookie-consent[aria-live="polite"] {
  display: block;
}
.cookie-consent-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  justify-content: space-between;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.cookie-actions {
  display: flex;
  gap: var(--space-2);
}
.cookie-message {
  color: var(--color-neutral-700);
  font-size: var(--font-size-1);

}
@media (max-width: 600px) {
  .cookie-consent-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }
}

.sr-only-focusable:active,
.sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
  border: 0 !important;
  background: #f4f6fb;
  color: #232946;
  padding: var(--space-2);
  z-index: 10000;
}