* {
    box-sizing: border-box;
}

:root {
    --bg-dark: #121417;
    --card-bg: #1c1f24;
    --card-border: #2a2e35;
    --accent-neon: #ccff00;
    --accent-orange: #ff5500;
    --text-main: #f0f3f6;
    --text-muted: #8b949e;
    --success-green: #00e676;
    --danger-red: #ff3366;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    margin: 0;
    padding: 12px;
    color: var(--text-main);
}

header {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--card-bg);
    padding: 18px 24px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    border-left: 5px solid var(--accent-neon);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    margin-bottom: 25px;
}

.logo {
    margin: 0;
    font-size: 28px;
    color: var(--accent-neon);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-style: italic;
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    font-weight: 600;
}

.btn-logout {
    color: var(--danger-red);
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: opacity 0.2s;
}

.btn-logout:hover {
    opacity: 0.8;
}

.card {
    background: var(--card-bg);
    padding: 24px;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.login-card {
    text-align: center;
    max-width: 450px;
    margin: 60px auto;
    border-top: 4px solid var(--accent-neon);
}

.login-card h2 {
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-neon);
}

/* Knoppen & Interactie */
.btn, button {
    display: block;
    width: 100%;
    text-align: center;
    background: var(--accent-neon);
    color: #000;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    box-sizing: border-box;
    transition: transform 0.1s, filter 0.2s;
}

.btn:hover, button:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn:active, button:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--accent-neon);
    color: #000;
}

.btn-google {
    background: #4285f4;
    color: #ffffff;
}

.btn-success, .btn.green {
    background: var(--success-green);
    color: #000;
}

.btn-secondary {
    background: #2a2e35;
    color: var(--text-main);
    padding: 10px 16px;
    font-size: 13px;
    border-radius: 6px;
    margin-top: 10px;
    border: 1px solid var(--card-border);
}

.btn-small {
    display: inline-block;
    background: #2a2e35;
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    border: 1px solid var(--card-border);
}

.btn-edit {
    background: var(--accent-orange);
    color: #fff;
    border: none;
}

.btn-delete {
    background: rgba(255, 51, 102, 0.15);
    color: var(--danger-red);
    border: 1px solid var(--danger-red);
    padding: 8px 12px;
    width: auto;
}

/* Dashboard & Schema Grids */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.dashboard-header h2 {
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 0;
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.day-card {
    border-top: 3px solid var(--accent-neon);
}

.day-card h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--accent-neon);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px;
}

.day-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px;
}

.day-card-header h3 {
    border-bottom: none;
    margin: 0;
    padding: 0;
}

/* Oefeningenlijst */
.exercise-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.exercise-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border);
}

.exercise-list li:last-child {
    border-bottom: none;
}

.exercise-list input[type="checkbox"] {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: var(--accent-neon);
}
/* Oefeningenlijst Basis */
.exercise-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.exercise-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    margin-bottom: 8px;
    border-radius: 6px;
    background: var(--bg-dark);
    border: 1px solid var(--card-border);
    transition: all 0.2s ease-in-out;
}

.exercise-list input[type="checkbox"] {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: var(--success-green);
}

.ex-details {
    font-size: 15px;
    display: flex;
    flex-direction: column;
}

.ex-details strong {
    color: #fff;
}

.ex-details small {
    color: var(--accent-orange);
    font-weight: 700;
}

/* DUITELIJKE VOLTOOIDE STIJL (Geen subtiele streep meer) */
.exercise-list li.completed {
    background: rgba(0, 230, 118, 0.12); /* Zachte groene achtergrond */
    border: 1px solid var(--success-green); /* Felle groene rand */
    box-shadow: 0 0 10px rgba(0, 230, 118, 0.2); /* Neon gloeidraad */
    position: relative;
}

.exercise-list li.completed .ex-details strong {
    color: var(--success-green); /* Tekst wordt felgroen */
    text-decoration: none; /* Verwijdert de subtiele streep */
}

.exercise-list li.completed .ex-details small {
    color: rgba(255, 255, 255, 0.7);
}

/* Badge 'VOLTOOIKT' rechts toevoegen */
.exercise-list li.completed::after {
    content: "✓ VOLTOOID";
    margin-left: auto;
    font-size: 11px;
    font-weight: 900;
    color: var(--success-green);
    letter-spacing: 1px;
    background: rgba(0, 230, 118, 0.2);
    padding: 4px 8px;
    border-radius: 4px;
}
.ex-details {
    font-size: 15px;
}

.ex-details strong {
    color: #fff;
}

.ex-details small {
    color: var(--accent-orange);
    font-weight: 700;
}

.exercise-list li.completed span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.exercise-list li.completed small {
    color: var(--text-muted);
}

.rest-day {
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 1px;
}

/* Formulieren & Inputs */
.exercise-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.exercise-row input, input[type="text"] {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    background: var(--bg-dark);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    border-radius: 6px;
}

.exercise-row input:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-neon);
}

.copy-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.copy-select {
    background: var(--bg-dark);
    color: var(--text-main);
    border: 1px solid var(--card-border);
    padding: 6px;
    border-radius: 4px;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 15px 0;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    cursor: pointer;
    background: var(--bg-dark);
    padding: 12px;
    border-radius: 6px;
    border: 1px solid var(--card-border);
}

.radio-option input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-neon);
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-weight: 600;
}

.alert-error {
    background: rgba(255, 51, 102, 0.2);
    color: var(--danger-red);
    border: 1px solid var(--danger-red);
}

/* Desktop layout */
@media (min-width: 600px) {
    body {
        padding: 24px;
        max-width: 1200px;
        margin: 0 auto;
    }
    header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    .user-info {
        width: auto;
        gap: 20px;
    }
    .btn, button {
        width: auto;
        display: inline-block;
    }
    .exercise-row {
        flex-direction: row;
    }
    .exercise-row input {
        flex: 1;
    }
}.logo-link {
    text-decoration: none;
    display: inline-block;
}
/* Tabbladen Styling */
.day-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 10px;
    margin-bottom: 15px;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    background: var(--card-bg);
    color: var(--text-muted);
    border: 1px solid var(--card-border);
    padding: 10px 16px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    white-space: nowrap;
    width: auto; /* Overschrijft de globale button width */
}

.tab-btn:hover {
    color: var(--text-main);
    border-color: var(--accent-neon);
}

.tab-btn.active {
    background: var(--accent-neon);
    color: #000;
    border-color: var(--accent-neon);
}

/* Toon alleen het actieve dag-kaartje */
.tab-content {
    display: none;
}

.tab-content.active-content {
    display: block;
}