/* ==========================================================================
   GLOBAL.CSS — CollabDays Netherlands 2027
   Impressive, modern, clean — WCAG 2.1 AA compliant
   ========================================================================== */

/* 1. Fonts & Custom Properties
   -------------------------------------------------------------------------- */
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Sans+Condensed:wght@600;700&family=IBM+Plex+Mono:wght@400&display=swap");

:root {
  /* Primary */
  --color-primary-hsl: 196, 47%, 52%;
  --color-primary: hsl(var(--color-primary-hsl));
  --color-primary-hover: hsl(196, 47%, 47%);

  /* Secondary */
  --color-secondary-hsl: 196, 49%, 18%;
  --color-secondary: hsl(var(--color-secondary-hsl));
  --color-secondary-hover: hsl(196, 49%, 13%);

  /* Backgrounds & Surfaces */
  --color-bg: hsl(195, 25%, 98%);
  --color-surface: hsl(0, 0%, 100%);
  --color-surface-alt: hsl(195, 30%, 95%);
  --color-surface-dark: hsl(196, 42%, 16%);
  --color-border: hsl(195, 18%, 84%);

  /* Text */
  --color-text: hsl(196, 35%, 14%);
  --color-text-muted: hsl(196, 18%, 34%);
  --color-text-inverse: hsl(0, 0%, 100%);
  --color-text-on-primary: hsl(196, 35%, 14%);
  --color-text-on-secondary: hsl(0, 0%, 100%);
  --color-text-on-surface-dark: hsl(0, 0%, 100%);

  /* Status */
  --color-success: hsl(155, 60%, 32%);
  --color-error: hsl(2, 72%, 48%);
  --color-overlay: hsla(196, 49%, 10%, 0.8);

  /* Typography */
  --font-heading: "IBM Plex Sans Condensed", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --text-display: clamp(2.5rem, 5vw, 4rem);
  --text-h1: clamp(2rem, 4vw, 3rem);
  --text-h2: clamp(1.5rem, 3vw, 2rem);
  --text-h3: clamp(1.125rem, 2vw, 1.5rem);
  --text-body: 1rem;
  --text-small: 0.875rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 6px 18px hsla(196, 35%, 14%, 0.08);
  --shadow-md: 0 12px 30px hsla(196, 35%, 14%, 0.12);
  --shadow-lg: 0 24px 48px hsla(196, 35%, 14%, 0.18);

  /* Transitions */
  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;

  /* Layout */
  --container-width: 1200px;
}

/* 2. Reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote {
  margin: 0;
}

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

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

button {
  border: 0;
  background: none;
  cursor: pointer;
}

ul,
ol {
  padding-left: 1.25rem;
}

body {
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* 3. Typography
   -------------------------------------------------------------------------- */
h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-family: var(--font-heading);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: var(--text-h1);
  font-weight: 700;
}

h2 {
  font-size: var(--text-h2);
  font-weight: 600;
}

h3 {
  font-size: var(--text-h3);
  font-weight: 600;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
}

p,
li {
  color: var(--color-text);
}

p {
  max-width: 70ch;
}

small {
  font-size: var(--text-small);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

/* 4. Accessibility (skip link, focus, sr-only, reduced motion)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-sm);
}

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

.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;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 5. Layout & GrapesJS Grid
   -------------------------------------------------------------------------- */
.container {
  width: min(100% - 2rem, var(--container-width));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-xl);
}

.gjs-row {
  display: flex;
  justify-content: flex-start;
  align-items: stretch;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.gjs-cell {
  min-height: 50px;
  flex-grow: 1;
  flex-basis: 100%;
}

.stack > * + * {
  margin-top: var(--space-md);
}

/* ==========================================================================
   SECTION COLOR UTILITIES
   Sets background, text, links, and button variants for full coverage
   ========================================================================== */
.section-dark {
  background-color: var(--color-surface-dark);
  color: var(--color-text-on-surface-dark);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6,
.section-dark p,
.section-dark span,
.section-dark li {
  color: inherit;
}

.section-dark a:not(.btn) {
  color: inherit;
  text-decoration: underline;
}

.section-dark a:not(.btn):hover {
  opacity: 0.85;
}

.section-dark .btn-primary {
  background-color: var(--color-text-on-surface-dark);
  color: var(--color-surface-dark);
}

.section-dark .btn-primary:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-surface-dark);
}

.section-dark .btn-outline {
  border-color: var(--color-text-on-surface-dark);
  color: var(--color-text-on-surface-dark);
}

.section-dark .btn-outline:hover {
  background-color: var(--color-text-on-surface-dark);
  color: var(--color-surface-dark);
}

.section-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}

.section-primary h1,
.section-primary h2,
.section-primary h3,
.section-primary h4,
.section-primary h5,
.section-primary h6,
.section-primary p,
.section-primary span,
.section-primary li {
  color: inherit;
}

.section-primary a:not(.btn) {
  color: inherit;
  text-decoration: underline;
}

.section-primary .btn-primary {
  background-color: var(--color-text-on-primary);
  color: var(--color-primary);
}

.section-primary .btn-primary:hover {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.section-primary .btn-outline {
  border-color: var(--color-text-on-primary);
  color: var(--color-text-on-primary);
}

.section-primary .btn-outline:hover {
  background-color: var(--color-secondary-hover);
  color: var(--color-text-inverse);
}

.section-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-on-secondary);
}

.section-secondary h1,
.section-secondary h2,
.section-secondary h3,
.section-secondary h4,
.section-secondary h5,
.section-secondary h6,
.section-secondary p,
.section-secondary span,
.section-secondary li {
  color: inherit;
}

.section-secondary a:not(.btn) {
  color: inherit;
  text-decoration: underline;
}

.section-secondary .btn-primary {
  background-color: var(--color-text-on-secondary);
  color: var(--color-secondary);
}

.section-secondary .btn-primary:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-secondary);
}

.section-secondary .btn-outline {
  border-color: var(--color-text-on-secondary);
  color: var(--color-text-on-secondary);
}

.section-secondary .btn-outline:hover {
  background-color: var(--color-text-on-secondary);
  color: var(--color-secondary);
}

.section-light {
  background-color: var(--color-surface-alt);
  color: var(--color-text);
}

/* 6. Components (buttons, inputs, cards)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-lg);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px hsla(var(--color-primary-hsl), 0.3);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.btn-outline:hover {
  background-color: var(--color-secondary-hover);
  color: var(--color-text-inverse);
}

.btn-small {
  min-height: 36px;
  padding-inline: var(--space-md);
  font-size: var(--text-small);
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

label {
  display: inline-block;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
  font-weight: 500;
}

input,
textarea,
select {
  width: 100%;
  min-height: 44px;
  padding: 0.75rem 0.875rem;
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px hsla(var(--color-primary-hsl), 0.18);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: var(--color-error);
}

.form-help,
.form-error {
  margin-top: var(--space-xs);
  font-size: var(--text-small);
}

.form-help {
  color: var(--color-text-muted);
}

.form-error {
  color: var(--color-error);
}

/* 7. Utilities
   -------------------------------------------------------------------------- */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-primary {
  color: var(--color-primary);
}

.text-muted {
  color: var(--color-text-muted);
}

.mt-md {
  margin-top: var(--space-md);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}

/* 8. Responsive
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
  .container {
    width: min(100% - 4rem, var(--container-width));
  }

  .section {
    padding-block: var(--space-2xl);
  }

  .gjs-row {
    flex-wrap: nowrap;
  }

  .gjs-cell {
    flex-basis: 0;
  }
}

@media (max-width: 767px) {
  h1,
  h2,
  h3,
  h4 {
    text-wrap: pretty;
  }

  .btn {
    width: 100%;
  }
}