/* ============================================
   CORE.CSS - Foundation Styles
   Variables, Reset, Layout, Typography, Utilities
   ============================================ */

/* -------------------------------------------
   CSS VARIABLES
   ------------------------------------------- */
:root {
    /* Verboom huisstijl kleuren */
    --verboom-red: #E30613;
    --verboom-red-hover: #C10511;
    --verboom-red-light: #FFE8EA;
    --verboom-red-dark: #A00410;
    
    /* Grijs palette */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* Functionele kleuren */
    --success: #10B981;
    --success-hover: #059669;
    --success-light: #D1FAE5;
    
    --warning: #F59E0B;
    --warning-hover: #D97706;
    --warning-light: #FEF3C7;
    
    --danger: #EF4444;
    --danger-hover: #DC2626;
    --danger-light: #FEE2E2;
    
    --info: #3B82F6;
    --info-hover: #2563EB;
    --info-light: #DBEAFE;
    
    /* Achtergronden */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F7FA;
    --bg-tertiary: #F9FAFB;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
    --font-mono: Monaco, Courier, monospace;
    
    /* Spacing scale */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;       /* 32px */
    --spacing-2xl: 3rem;      /* 48px */
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 10px;
    --radius-2xl: 12px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* -------------------------------------------
   RESET & BASE
   ------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--bg-secondary);
    
    /* Flexbox voor sticky footer */
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    
    overflow-x: hidden;
}

/* Main content neemt beschikbare ruimte */
main,
.main-content {
    flex: 1;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover:not(.btn) {
    color: var(--verboom-red);
}

/* -------------------------------------------
   TYPOGRAPHY
   ------------------------------------------- */
h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--verboom-red);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
}

/* -------------------------------------------
   LAYOUT CONTAINERS
   ------------------------------------------- */

/* Standaard container - voor forms en content pages */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Wide container - voor lijstpagina's met veel kolommen */
.container-wide {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem clamp(1rem, 3vw, 3rem);
}

/* Full width container - voor dashboards en analytics */
.container-full {
    width: 100%;
    margin: 0 auto;
    padding: 2rem clamp(1rem, 3vw, 3rem);
}

/* Responsive padding voor grote schermen */
@media (min-width: 1920px) {
    .container-wide,
    .container-full {
        padding: 2rem 4rem;
    }
}

/* -------------------------------------------
   GRID SYSTEMS
   ------------------------------------------- */

/* Card Grid - standaard responsive grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    column-gap: 1.5rem;
}

/* Vaste kolom varianten */
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Max kolommen voor formulieren */
.card-grid.max-2-cols {
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

/* Altijd 1 kolom */
.card-grid.single-col {
    grid-template-columns: 1fr;
}

/* Span utilities — voor kaarten die meerdere rijen/kolommen innemen */
.row-span-2 { grid-row: span 2; }
.row-span-3 { grid-row: span 3; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }

/* Form card grid - specifiek voor formulieren */
.form-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Stats grid - voor overzichtspagina's */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Responsive: tablet en kleiner */
@media (max-width: 1024px) {
    .card-grid.cols-2,
    .card-grid.cols-3,
    .card-grid.cols-4,
    .card-grid.max-2-cols,
    .form-card-grid {
        grid-template-columns: 1fr;
    }

    /* Spans hebben geen effect meer op 1 kolom */
    .row-span-2,
    .row-span-3 { grid-row: span 1; }
    .col-span-2,
    .col-span-3 { grid-column: span 1; }
}

/* -------------------------------------------
   SPACING UTILITIES
   ------------------------------------------- */
.m-0 { margin: 0; }
.m-1 { margin: 0.5rem; }
.m-2 { margin: 1rem; }
.m-3 { margin: 1.5rem; }
.m-4 { margin: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* -------------------------------------------
   DISPLAY & FLEX UTILITIES
   ------------------------------------------- */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.align-start { align-items: flex-start; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* -------------------------------------------
   TEXT UTILITIES
   ------------------------------------------- */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.fw-normal { font-weight: 400; }
.fw-medium { font-weight: 500; }
.fw-bold { font-weight: 600; }

.text-muted { color: var(--gray-500); }
.text-primary { color: var(--verboom-red); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }

.text-small { font-size: 0.875rem; }
.text-large { font-size: 1.125rem; }

/* -------------------------------------------
   WIDTH UTILITIES
   ------------------------------------------- */
.w-25 { width: 25%; }
.w-50 { width: 50%; }
.w-75 { width: 75%; }
.w-100 { width: 100%; }
.w-auto { width: auto; }

/* -------------------------------------------
   RESPONSIVE
   ------------------------------------------- */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}