/* ==========================================================================
   GLOBAL.CSS — CollabDays Belgium 2026
   Editorial-technical: black, cyan highlighter, IBM Plex
   WCAG 2.1 AA compliant
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Sans+Condensed:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

/* 1. Fonts & Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Primary — Near-black */
    --color-primary-hsl: 0, 0%, 8%;
    --color-primary: hsl(var(--color-primary-hsl));
    --color-primary-hover: hsl(0, 0%, 3%);

    /* Secondary — Electric cyan highlighter (#0fa2c2) */
    --color-secondary-hsl: 190, 86%, 41%;
    --color-secondary: hsl(var(--color-secondary-hsl));
    --color-secondary-hover: hsl(190, 86%, 36%);

    /* Accent — Deep teal (#063a46) */
    --color-accent-hsl: 192, 84%, 14%;
    --color-accent: hsl(var(--color-accent-hsl));
    --color-accent-hover: hsl(192, 84%, 10%);

    /* Backgrounds & Surfaces */
    --color-bg: hsl(40, 20%, 99%);
    --color-surface: hsl(0, 0%, 100%);
    --color-surface-alt: hsl(40, 15%, 96%);
    --color-surface-dark: hsl(0, 0%, 8%);
    --color-border: hsl(0, 0%, 88%);

    /* Text */
    --color-text: hsl(0, 0%, 8%);
    --color-text-muted: hsl(0, 0%, 38%);
    --color-text-inverse: hsl(0, 0%, 100%);
    --color-text-on-primary: hsl(0, 0%, 100%);
    --color-text-on-secondary: hsl(0, 0%, 8%);
    --color-text-on-surface-dark: hsl(40, 20%, 96%);

    /* Status */
    --color-success: hsl(142, 65%, 32%);
    --color-error: hsl(0, 72%, 45%);
    --color-overlay: hsla(0, 0%, 8%, 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(2.75rem, 6vw, 5rem);
    --text-h1: clamp(2rem, 4vw, 3rem);
    --text-h2: clamp(1.5rem, 3vw, 2.25rem);
    --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 — minimal */
    --shadow-sm: 0 1px 2px hsla(0, 0%, 0%, 0.06);
    --shadow-md: 0 4px 12px hsla(0, 0%, 0%, 0.08);
    --shadow-lg: 0 16px 40px hsla(0, 0%, 0%, 0.12);

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;
}

/* 2. Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }

/* 3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.01em;
    color: var(--color-text);
}
h1 { font-size: var(--text-h1); line-height: 1.15; }
h2 { font-size: var(--text-h2); font-weight: 600; line-height: 1.2; }
h3 { font-size: var(--text-h3); font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; }

p { line-height: 1.6; }
p + p { margin-top: var(--space-md); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    background: linear-gradient(transparent 60%, hsla(var(--color-secondary-hsl), 0.8) 60%);
}

code, kbd, samp, pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.overline {
    font-family: var(--font-mono);
    font-size: var(--text-small);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
}

.display { font-size: var(--text-display); font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; }

.highlight {
    background: linear-gradient(transparent 60%, var(--color-secondary) 60%);
    padding: 0 0.15em;
}

/* 4. Accessibility
   -------------------------------------------------------------------------- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    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-secondary);
    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: 100%;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--space-md);
}

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

.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%;
}
@media (min-width: 768px) {
    .gjs-row { flex-wrap: nowrap; }
    .gjs-cell { flex-basis: 0; }
}

/* 6. Components
   -------------------------------------------------------------------------- */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    height: 44px;
    padding: 0 var(--space-lg);
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 600;
    line-height: 1;
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast);
    white-space: nowrap;
}
.btn:hover { background-image: none; }
.btn:active { transform: translateY(1px); }

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

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

.btn-small {
    height: 36px;
    padding: 0 var(--space-md);
    font-size: var(--text-small);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px hsla(var(--color-secondary-hsl), 0.4);
}

/* Inputs */
label {
    display: block;
    font-size: var(--text-small);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

input, select, textarea {
    width: 100%;
    min-height: 44px;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--color-surface);
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
textarea { min-height: 120px; padding-top: var(--space-md); resize: vertical; }

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(var(--color-secondary-hsl), 0.35);
}

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

/* Cards */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-text);
}

/* Tags / pills (track labels) */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background-color: var(--color-surface-alt);
    color: var(--color-text);
    border-radius: var(--radius-full);
}

/* Ticker band */
.ticker-band {
    height: 6px;
    background-color: var(--color-secondary);
    width: 100%;
}

/* 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); }
.text-mono { font-family: var(--font-mono); }

.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); }

/* Section color classes — always pair bg + text */
.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: var(--color-secondary); text-decoration: none; }
.section-dark a:not(.btn):hover { background: none; opacity: 0.85; }
.section-dark .btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-text-on-secondary);
    border-color: var(--color-secondary);
}
.section-dark .btn-primary:hover {
    background-color: var(--color-secondary-hover);
    color: var(--color-text-on-secondary);
    border-color: var(--color-secondary-hover);
}
.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-dark .card {
    background-color: hsl(0, 0%, 12%);
    border-color: hsl(0, 0%, 20%);
    color: var(--color-text-on-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: var(--color-secondary); text-decoration: none; }
.section-primary .btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-text-on-secondary);
    border-color: var(--color-secondary);
}
.section-primary .btn-primary:hover {
    background-color: var(--color-secondary-hover);
    color: var(--color-text-on-secondary);
    border-color: var(--color-secondary-hover);
}
.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-text-on-primary);
    color: var(--color-primary);
}

.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: none; }
.section-secondary .btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-on-primary);
    border-color: var(--color-primary);
}
.section-secondary .btn-primary:hover {
    background-color: var(--color-primary-hover);
    color: var(--color-text-on-primary);
    border-color: var(--color-primary-hover);
}
.section-secondary .btn-outline {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.section-secondary .btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}

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

/* 8. Responsive
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
    .container { padding-inline: var(--space-xl); }
}
@media (max-width: 767px) {
    .section { padding-block: var(--space-xl); }
    .container { padding-inline: var(--space-md); }
    h1 { font-size: clamp(1.75rem, 7vw, 2.25rem); }
}