/* Kleurplaat — basisstijl */
:root {
    --kleur-achtergrond: #f5f5f5;
    --kleur-kaart: #fff;
    --kleur-tekst: #333;
    --kleur-accent: #4A90D9;
    --kleur-grijze-lijn: #ccc;
    --radius: 8px;
    --space-xs: 0.3rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--kleur-achtergrond);
    color: var(--kleur-tekst);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

header {
    background: var(--kleur-kaart);
    padding: var(--space-md) var(--space-xl);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 { font-size: 1.5rem; }

nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    align-items: center;
}

nav a, nav button {
    margin: 0;
    text-decoration: none;
    color: var(--kleur-tekst);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    transition: background 0.2s;
    background: transparent;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
}

nav a:hover, nav a.active, nav button:hover {
    background: var(--kleur-accent);
    color: #fff;
}

main {
    max-width: 1200px;
    margin: var(--space-xl) auto;
    padding: 0 var(--space-md);
    width: 100%;
}

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

h2 {
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--kleur-grijze-lijn);
}

h3 { font-size: 1.1rem; margin-bottom: var(--space-sm); }

h4 { font-size: 1rem; margin-bottom: var(--space-sm); color: #555; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.grid .card {
    background: var(--kleur-kaart);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    display: flex;
    flex-direction: column;
}

.grid .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.grid .card img, .grid .card svg {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: #fafafa;
}

.grid .card .info {
    padding: var(--space-sm);
    font-size: 0.9rem;
    flex: 1;
}

.btn-delete {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    background: #f44336;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.2rem 0.4rem;
    cursor: pointer;
    font-size: 0.9rem;
    opacity: 0.7;
    transition: opacity 0.2s;
    z-index: 2;
}

.btn-delete:hover { opacity: 1; }

#categorie-filter { margin-bottom: var(--space-md); }

#categorie-checkboxen {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

#categorie-checkboxen label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.7rem;
    background: var(--kleur-kaart);
    border-radius: var(--radius);
    cursor: pointer;
    user-select: none;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    min-height: 44px;
}

#categorie-checkboxen input[type="checkbox"] {
    accent-color: var(--kleur-accent);
    width: 18px;
    height: 18px;
}

#kleurscherm {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
}

#btn-terug {
    align-self: flex-start;
    padding: 0.6rem 1.2rem;
    background: var(--kleur-achtergrond);
    border: 1px solid var(--kleur-grijze-lijn);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
    min-height: 44px;
}

#btn-terug:hover { background: var(--kleur-grijze-lijn); }

.voortgang-indicator {
    font-size: 1rem;
    font-weight: bold;
    color: var(--kleur-accent);
    padding: 0.4rem 1rem;
    background: var(--kleur-kaart);
    border-radius: var(--radius);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

#svg-container {
    background: var(--kleur-kaart);
    border-radius: var(--radius);
    padding: var(--space-md);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    max-width: 100%;
    width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#svg-container svg {
    max-width: 100%;
    max-height: 70vh;
    height: auto;
    width: auto;
    display: block;
}

#palette {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    padding: var(--space-md);
    background: var(--kleur-kaart);
    border-radius: var(--radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    max-width: 100%;
    width: 100%;
}

#palette .palette-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: var(--radius);
    border: 2px solid transparent;
    transition: border-color 0.2s, background 0.2s;
    min-width: 56px;
    min-height: 70px;
    justify-content: center;
}

#palette .palette-item:hover { border-color: var(--kleur-grijze-lijn); }

#palette .palette-item.selected {
    border-color: var(--kleur-accent);
    background: rgba(74, 144, 217, 0.1);
}

#palette .palette-item .nummer { font-size: 0.85rem; font-weight: bold; }

#palette .palette-item .kleurvlak {
    width: 44px;
    height: 44px;
    border-radius: 4px;
    border: 1px solid var(--kleur-grijze-lijn);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-5px); }
    40% { transform: translateX(5px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}

@keyframes pulse {
    0%, 100% { fill: inherit; }
    50% { fill: #f44336; }
}

.shake {
    animation: shake 0.4s ease-in-out, pulse 0.4s ease-in-out;
}

.leeg {
    grid-column: 1 / -1;
    text-align: center;
    color: #999;
    padding: var(--space-xl);
    font-style: italic;
}

form {
    background: var(--kleur-kaart);
    padding: var(--space-md);
    border-radius: var(--radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: var(--space-md);
}

form label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: 0.95rem;
}

form input, form select, form button {
    padding: 0.6rem;
    border: 1px solid var(--kleur-grijze-lijn);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    width: 100%;
    max-width: 100%;
}

form input[type="file"] { padding: 0.3rem; }

form button {
    background: var(--kleur-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
    width: auto;
    padding: 0.6rem 1.2rem;
    min-height: 44px;
    margin-top: var(--space-sm);
}

form button:hover { background: #3a7bc8; }

.params {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-md);
    margin: var(--space-md) 0;
}

.params label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.9rem;
    margin-bottom: 0;
}

.login-form { max-width: 360px; margin: 0 auto; }

.login-form label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin-bottom: var(--space-md);
}

.login-form button { width: 100%; }

.error {
    color: #f44336;
    margin-top: var(--space-sm);
    font-size: 0.9rem;
}

.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin: var(--space-md) 0;
}

.preview-grid > div { min-width: 0; }

.preview-grid img, .preview-grid svg {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--kleur-grijze-lijn);
    border-radius: var(--radius);
    display: block;
}

#preview-palette {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    padding: var(--space-md);
    background: var(--kleur-achtergrond);
    border-radius: var(--radius);
    margin: var(--space-md) 0;
}

#preview-palette .palette-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 0.3rem;
    border-radius: var(--radius);
    border: 2px solid transparent;
}

#preview-palette .palette-item .nummer { font-size: 0.8rem; font-weight: bold; }

#preview-palette .palette-item .kleurvlak {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    border: 1px solid var(--kleur-grijze-lijn);
}

.preview-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--kleur-grijze-lijn);
}

.preview-actions input[type="text"] { flex: 1 1 200px; min-width: 0; }

.preview-actions button {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
    min-height: 44px;
}

#btn-toevoegen { background: #4CAF50; color: #fff; }
#btn-opnieuw { background: #FF9800; color: #fff; }
#btn-annuleren { background: #f44336; color: #fff; }

#preview-categorieen {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    flex: 1 1 100%;
    justify-content: center;
    padding: var(--space-sm) 0;
}

#preview-categorieen label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.9rem;
    padding: 0.3rem 0.6rem;
    background: var(--kleur-achtergrond);
    border-radius: var(--radius);
    cursor: pointer;
    user-select: none;
}

.list { list-style: none; }

.list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    background: var(--kleur-kaart);
    margin-bottom: var(--space-sm);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    gap: var(--space-sm);
}

.list li button {
    padding: 0.4rem 0.8rem;
    background: #f44336;
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-family: inherit;
    min-height: 36px;
}

.hidden { display: none !important; }

/* --- Responsive: tablet (≤ 900px) --- */
@media (max-width: 900px) {
    main { margin-top: var(--space-md); }
    .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--space-sm); }
    .preview-grid { grid-template-columns: 1fr; }
    #svg-container svg { max-height: 60vh; }
}

/* --- Responsive: mobiel (≤ 600px) --- */
@media (max-width: 600px) {
    :root {
        --space-md: 0.75rem;
        --space-lg: 1rem;
        --space-xl: 1.25rem;
    }

    header {
        padding: var(--space-sm) var(--space-md);
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-xs);
    }

    header h1 { font-size: 1.2rem; text-align: center; }

    nav { justify-content: center; gap: 2px; }

    nav a, nav button {
        padding: 0.4rem 0.7rem;
        font-size: 0.9rem;
        flex: 1 1 auto;
        text-align: center;
    }

    main { padding: 0 var(--space-sm); margin-top: var(--space-md); }

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

    h2 { font-size: 1.15rem; }
    h3 { font-size: 1rem; }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: var(--space-sm);
    }

    .grid .card img, .grid .card svg { aspect-ratio: 1 / 1; }

    .grid .card .info { font-size: 0.8rem; padding: var(--space-xs) var(--space-sm); }

    .btn-delete { padding: 0.3rem 0.5rem; font-size: 1rem; }

    #categorie-checkboxen {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xs);
    }

    #categorie-checkboxen label {
        padding: 0.4rem 0.5rem;
        font-size: 0.85rem;
        min-height: 40px;
    }

    #kleurscherm { gap: var(--space-sm); }

    #btn-terug { width: 100%; text-align: center; font-size: 0.95rem; }

    .voortgang-indicator { font-size: 0.9rem; padding: 0.3rem 0.6rem; max-width: 100%; }

    #svg-container { padding: var(--space-sm); }

    #svg-container svg { max-height: 55vh; }

    #palette { padding: var(--space-sm); gap: 4px; }

    #palette .palette-item { min-width: 44px; min-height: 56px; padding: 0.2rem; }

    #palette .palette-item .kleurvlak { width: 32px; height: 32px; }

    #palette .palette-item .nummer { font-size: 0.75rem; }

    form { padding: var(--space-sm); }

    form input, form select { font-size: 16px; }

    form button { width: 100%; padding: 0.7rem; }

    .params { grid-template-columns: 1fr 1fr; gap: var(--space-sm); }

    .params label { font-size: 0.8rem; }

    .params input, .params select { font-size: 16px; padding: 0.5rem; }

    .preview-actions { flex-direction: column; align-items: stretch; }

    .preview-actions input[type="text"] { flex: 1 1 auto; width: 100%; }

    .preview-actions button { width: 100%; }

    #preview-categorieen { justify-content: flex-start; }

    .list li { flex-wrap: wrap; padding: var(--space-sm); }

    .list li button { flex: 1 1 auto; }
}

/* --- Zeer smal (≤ 380px) --- */
@media (max-width: 380px) {
    .grid { grid-template-columns: 1fr 1fr; }
    #categorie-checkboxen { grid-template-columns: 1fr; }
    .params { grid-template-columns: 1fr; }
    #palette .palette-item { min-width: 40px; }
    #palette .palette-item .kleurvlak { width: 28px; height: 28px; }
}

/* --- Zoom-controles (Fase 5.3) --- */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: var(--space-sm);
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--kleur-kaart);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.zoom-controls button {
    width: 36px;
    height: 36px;
    border: 1px solid var(--kleur-grijze-lijn);
    background: var(--kleur-achtergrond);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, border-color 0.2s;
}

.zoom-controls button:hover {
    background: var(--kleur-accent);
    color: #fff;
    border-color: var(--kleur-accent);
}

.zoom-controls button:active {
    transform: scale(0.95);
}

#zoom-niveau {
    min-width: 50px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--kleur-tekst);
}

#btn-zoom-reset {
    width: auto;
    padding: 0 0.8rem;
    font-size: 0.9rem;
    font-weight: normal;
}

/* SVG-container met scroll bij zoom */
#svg-container {
    overflow: auto;
    max-height: 65vh;
    position: relative;
}

#svg-container svg {
    transition: transform 0.1s ease-out;
    transform-origin: center center;
}

/* Responsive: zoom-controles op mobiel */
@media (max-width: 600px) {
    .toolbar {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .zoom-controls {
        width: 100%;
        justify-content: center;
    }

    .zoom-controls button {
        width: 44px;
        height: 44px;
    }

    #btn-zoom-reset {
        padding: 0 1rem;
    }

    #svg-container {
        max-height: 50vh;
    }
}