:root {
    --bg: #0f1115;
    --kaart-bg: #1a1d24;
    --tekst: #e8e8ea;
    --dim: #9a9ea6;
    --accent: #4f8cff;
    --groen: #3ecf8e;
    --rood: #e5534b;
    --rand: #2a2e37;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--tekst);
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--rand);
}

header h1 { font-size: 1.2rem; margin: 0; }

nav { display: flex; align-items: center; gap: 8px; }

.tab {
    background: transparent;
    border: 1px solid var(--rand);
    color: var(--dim);
    padding: 6px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}

.tab.actief {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.uitloggen {
    color: var(--dim);
    text-decoration: none;
    font-size: 0.85rem;
    margin-left: 8px;
}

main {
    max-width: 720px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.kaart {
    background: var(--kaart-bg);
    border: 1px solid var(--rand);
    border-radius: 12px;
    padding: 18px 20px;
    line-height: 1.5;
}

.kaart b { color: var(--accent); }

#chat-sectie {
    background: var(--kaart-bg);
    border: 1px solid var(--rand);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

#chat-berichten {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 50vh;
    overflow-y: auto;
}

.bericht {
    padding: 10px 14px;
    border-radius: 10px;
    max-width: 85%;
    line-height: 1.4;
}

.bericht.gebruiker {
    background: var(--accent);
    color: white;
    align-self: flex-end;
}

.bericht.coach {
    background: #23262e;
    align-self: flex-start;
}

.bericht.laden { color: var(--dim); font-style: italic; }

.bevestig-knoppen {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.bevestig-knoppen button {
    flex: 1;
    padding: 8px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

.knop-ja { background: var(--groen); color: #062; }
.knop-nee { background: var(--rood); color: white; }

#chat-form {
    display: flex;
    gap: 8px;
}

#chat-invoer {
    flex: 1;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--rand);
    background: #12141a;
    color: var(--tekst);
    font-size: 1rem;
}

#chat-form button {
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    background: var(--accent);
    color: white;
    cursor: pointer;
}

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-card {
    background: var(--kaart-bg);
    border: 1px solid var(--rand);
    border-radius: 12px;
    padding: 32px;
    width: 300px;
    text-align: center;
}

.login-card h1 { font-size: 1.3rem; margin-bottom: 20px; }

.login-card form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.login-card input {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--rand);
    background: #12141a;
    color: var(--tekst);
    font-size: 1rem;
}

.login-card button {
    padding: 10px;
    border-radius: 8px;
    border: none;
    background: var(--accent);
    color: white;
    cursor: pointer;
    font-size: 1rem;
}

.fout { color: var(--rood); font-size: 0.85rem; }