/* =====================================================
   VARIABLES
   ===================================================== */
:root {
  /* Colors */
  --color-background: #fafbfc;
  --color-surface: #fff;
  --color-text: #1a1d1f;
  --color-primary: #247cff;
  --color-primary-hover: #125cd6;
  --color-success: #16b47b;
  --color-warning: #ffb300;
  --color-danger: #ef3d44;

  --color-gray-50: #f5f6fa;
  --color-gray-100: #ebedf0;
  --color-gray-200: #e0e3e7;
  --color-gray-300: #ccd1d7;
  --color-gray-400: #b5bac2;
  --color-gray-500: #8a919c;
  --color-gray-600: #6d7580;
  --color-gray-700: #525862;
  --color-gray-800: #363941;
  --color-gray-900: #23252a;

  /* 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: 1.5rem;     /* 24px */
  --font-size-2xl: 2rem;      /* 32px */
  --font-size-3xl: 2.5rem;    /* 40px */

  --line-height-tight: 1.2;
  --line-height-base: 1.5;
  --line-height-loose: 1.7;

  /* Spacing scale */
  --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-24: 96px;

  /* Radius */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(36, 44, 63, 0.05);
  --shadow-sm: 0 2px 8px rgba(36, 44, 63, 0.07);
  --shadow-md: 0 4px 16px rgba(36, 44, 63, 0.12);
  --shadow-lg: 0 8px 32px rgba(36, 44, 63, 0.16);

  /* Transition durations */
  --transition-fast: 0.12s;
  --transition-normal: 0.24s;
  --transition-slow: 0.4s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

code, pre {
  font-family: var(--font-mono);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: inherit;
  border: none;
  background: none;
  color: inherit;
}

/* Remove all outlines except when using keyboard navigation */
:focus:not(:focus-visible) {
  outline: none;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove tap highlight on mobile */
html {
  -webkit-tap-highlight-color: transparent;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition-duration: 0s !important;
    animation-duration: 0s !important;
  }
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-text);
  font-weight: 700;
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-8);
}
h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-6);
}
h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}
h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}
h5 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-2);
}
h6 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-loose);
  color: var(--color-text);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-normal);
}
a:hover,
a:focus-visible {
  color: var(--color-primary-hover);
  text-decoration: underline;
}
a:active {
  color: var(--color-primary-hover);
}

a[aria-current="page"] {
  font-weight: 600;
  text-underline-offset: 2px;
}

hr {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: var(--space-8) 0;
}

/* =====================================================
   UTILITIES
   ===================================================== */
.container {
  width: 100%;
  max-width: 1280px;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  margin-left: auto;
  margin-right: auto;
}

.flex {
  display: flex;
}
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.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;
}

/* Spacing helpers */
.mt-4 { margin-top: var(--space-4) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.pt-8 { padding-top: var(--space-8) !important; }
.pb-8 { padding-bottom: var(--space-8) !important; }

/* =====================================================
   COMPONENTS
   ===================================================== */
.button, button, [type="button"], [type="submit"], [type="reset"] {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
  font-family: var(--font-sans);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-xs);
  transition: background var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
  font-size: var(--font-size-base);
}
.button:hover,
.button:focus-visible,
button:hover,
button:focus-visible,
[type="button"]:hover,
[type="button"]:focus-visible,
[type="submit"]:hover,
[type="submit"]:focus-visible,
[type="reset"]:hover,
[type="reset"]:focus-visible {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-sm);
}
.button:disabled,
button:disabled,
[type="button"]:disabled,
[type="submit"]:disabled,
[type="reset"]:disabled {
  background: var(--color-gray-300);
  color: var(--color-gray-600);
  cursor: not-allowed;
  box-shadow: none;
}

input,
select,
textarea {
  display: block;
  width: 100%;
  font-size: var(--font-size-base);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-300);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: none;
  transition: border-color var(--transition-normal), box-shadow var(--transition-fast);
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(36, 124, 255, 0.08);
}
input:disabled,
select:disabled,
textarea:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-500);
}
input[type="checkbox"],
input[type="radio"] {
  display: inline-block;
  width: auto;
  padding: 0;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-8);
  transition: box-shadow var(--transition-fast);
}
.card:hover,
.card:focus-within {
  box-shadow: var(--shadow-lg);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  .card {
    padding: var(--space-6);
  }
}
@media (max-width: 600px) {
  .container {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }
  .card {
    padding: var(--space-4);
  }
}

/* =====================================================
   HEADER & FOOTER STYLES (shared across pages)
   ===================================================== */
/* Header Styles */
.trs-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.trs-header__container { min-height: 68px; }
.trs-header__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--color-primary);
}
.trs-header__nav-list {
  display: flex;
  gap: var(--space-6);
}
.trs-header__nav-list a {
  font-weight: 500;
  color: var(--color-text);
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.trs-header__nav-list a:hover,
.trs-header__nav-list a:focus-visible { background: var(--color-gray-50); }

.trs-header__icon-user {
  display: inline-block;
  vertical-align: middle;
  width: 18px;
  height: 18px;
  background: url('../icons/user.svg') no-repeat center/contain;
  margin-right: 4px;
}
/* Menu btn for mobile */
.trs-header__menu-btn {
  background: transparent;
  border: none;
  display: none;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  margin-left: var(--space-4);
}
.trs-header__menu-icon {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  position: relative;
}
.trs-header__menu-icon::before,
.trs-header__menu-icon::after {
  content: '';
  display: block;
  position: absolute;
  width: 28px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  left: 0;
  transition: transform 0.24s;
}
.trs-header__menu-icon::before { top: -10px; }
.trs-header__menu-icon::after  { top: 10px; }
/* mobile menu hidden/shown */
.trs-header__mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4) 0;
}
.trs-header__mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
  margin: 0 auto;
  max-width: 90vw;
}
@media (max-width: 900px) {
  .trs-header__nav-list { display: none; }
  .trs-header__menu-btn { display: inline-flex; }
}
@media (max-width: 900px) {
  .trs-header__mobile-menu[hidden] { display: none; }
  .trs-header__mobile-menu:not([hidden]) { display: block; }
}

/* Footer Styles */
.trs-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-gray-100);
  padding: var(--space-8) 0 var(--space-12) 0;
  margin-top: var(--space-12);
  position: relative;
  z-index: 1;
}
.trs-footer__container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  justify-content: space-between;
  align-items: flex-start;
}
.trs-footer__main { display: flex; flex-direction: column; gap: var(--space-3); }
.trs-footer__logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
}
.trs-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin: 0; padding: 0;
}
.trs-footer__nav a { color: var(--color-gray-700); font-weight: 500; }
.trs-footer__nav a:hover,
.trs-footer__nav a:focus-visible { color: var(--color-primary); }
.trs-footer__legal ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0; padding: 0;
  font-size: var(--font-size-sm);
}
.trs-footer__legal a { color: var(--color-gray-600); }
.trs-footer__copyright {
  width: 100%;
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  text-align: center;
}
@media (max-width: 700px) {
  .trs-footer__container { flex-direction: column; gap: var(--space-6); align-items: stretch; }
  .trs-footer__main { align-items: flex-start; }
}

/* ========== Cookie Consent ========= */
.trs-cookie-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  padding: 16px 24px;
  background: var(--color-surface);
  box-shadow: 0 -4px 24px rgba(36, 44, 63, 0.09);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  z-index: 2000;
  gap: var(--space-4);
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: transform 0.24s, opacity 0.3s;
}
.trs-cookie-banner[hidden] {
  display: none;
  opacity: 0;
  pointer-events: none;
}
.trs-cookie-banner__actions {
  display: flex;
  gap: var(--space-3);
}
.trs-cookie-banner__btn {
  min-width: 90px;
  padding: var(--space-2) var(--space-6);
}
.trs-cookie-banner__btn--secondary {
  background: var(--color-gray-100);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.trs-cookie-banner__btn--secondary:hover, .trs-cookie-banner__btn--secondary:focus-visible {
  background: var(--color-gray-200);
  color: var(--color-primary-hover);
}

@media (max-width: 480px) {
  .trs-cookie-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    padding: var(--space-4) var(--space-2);
    gap: var(--space-3);
  }
  .trs-cookie-banner__actions { justify-content: flex-end; }
}