:root {
    --primary: #0057AD;
    --primary-light: #41A0FF;

    --blue-dark: #003B78;
    --blue-deep: #002952;

    --white: #F8FAFC;
    --black: #101820;

    --grey-100: #F1F5F9;
    --grey-200: #E2E8F0;
    --grey-500: #64748B;
    --grey-700: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    /* Achtergrond is nu blue-deep */
    background-color: var(--blue-deep);
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

header {
    width: 100%;
    /* Header iets donkerder dan pagina-bg voor mooi contrast */
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--blue-dark);
    padding: 1.5rem 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
}

header h1 {
    font-size: 1.25rem;
    color: var(--white);
    letter-spacing: -0.5px;
}

header p {
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-top: 0.25rem;
}

.container {
    width: 100%;
    max-width: 470px;
    padding: 1rem;
}

/* Feed & Cards */
.feed {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    /* Kaartjes gebruiken blue-dark */
    background: var(--blue-dark);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.card img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.card-content {
    padding: 1rem;
}

.card-content p {
    font-size: 0.95rem;
    color: var(--grey-100);
    line-height: 1.4;
}

.card-content .date {
    display: block;
    font-size: 0.75rem;
    color: var(--primary-light);
    margin-top: 0.5rem;
    text-transform: uppercase;
}

/* Empty State */
.empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--grey-500);
}

/* Admin Form */
.admin-card {
    background: var(--blue-dark);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.form-group {
    margin-bottom: 1.2rem;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--grey-200);
    margin-bottom: 0.5rem;
}

input[type="file"], textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--blue-deep);
    border-radius: 6px;
    background-color: var(--blue-deep);
    color: var(--white);
    font-family: inherit;
}

input[type="file"]::file-selector-button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    margin-right: 0.5rem;
    cursor: pointer;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

textarea::placeholder {
    color: var(--grey-500);
}

button {
    width: 100%;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    padding: 0.8rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

button:hover {
    background-color: var(--primary-light);
}

button:active {
    transform: scale(0.98);
}