/* ==========================================================================
   Aarhus Kommune — Opkraevningsoverblik Mockup
   CSS Custom Properties + BEM naming + WCAG 2.1 AA
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:wght@400;500;600;700;800&display=swap');

:root {
    --color-primary: #003C50;
    --color-primary-light: #F5F5F0;
    --color-success: #0B6E4F;
    --color-success-bg: #E8F5E9;
    --color-warning: #B8860B;
    --color-warning-bg: #FFF8E1;
    --color-danger: #C62828;
    --color-danger-bg: #FFEBEE;
    --color-muted: #546E7A;
    --color-muted-bg: #ECEFF1;
    --color-text: #222;
    --color-text-secondary: #666;
    --color-text-light: #888;
    --color-border: #ddd;
    --color-bg: #F5F5F0;
    --color-white: #fff;
    --font-family: 'Source Sans 3', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --max-width: 960px;
    --radius: 10px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --focus-ring: 0 0 0 3px rgba(0, 60, 80, 0.4);
}

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

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 1000;
    padding: 12px 24px;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 0 0 var(--radius) var(--radius);
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
}

/* Focus indicators */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    box-shadow: var(--focus-ring);
    outline: none;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
    background: var(--color-primary);
    color: var(--color-white);
}

.header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.header__logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--color-primary);
    font-size: 18px;
    flex-shrink: 0;
}

.header__kommune {
    font-size: 12px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    opacity: 0.7;
    margin-bottom: 2px;
}

.header__title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.header__user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.header__user-name {
    opacity: 0.8;
}

.header__logout {
    color: var(--color-white);
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 14px;
    font-family: inherit;
}

.header__logout:hover {
    opacity: 0.8;
}

/* ==========================================================================
   Main content
   ========================================================================== */

.main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 28px 24px 60px;
    width: 100%;
    flex: 1;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 20px 24px;
    margin-top: auto;
}

.footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    font-size: 14px;
    opacity: 0.7;
}

/* ==========================================================================
   Status Banner
   ========================================================================== */

.status-banner {
    border: 2px solid;
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 28px;
}

.status-banner__icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    flex-shrink: 0;
}

.status-banner__content {
    flex: 1;
}

.status-banner__label {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.status-banner__desc {
    font-size: 15px;
    color: #333;
}

.status-banner__amount {
    text-align: right;
    flex-shrink: 0;
}

.status-banner__amount-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 2px;
}

.status-banner__amount-value {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* ==========================================================================
   Tabs
   ========================================================================== */

.tabs__list {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
}

.tabs__tab {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 400;
    color: var(--color-text-secondary);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    margin-bottom: -2px;
    transition: all 0.15s;
    font-family: inherit;
}

.tabs__tab--active {
    font-weight: 700;
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tabs__tab:hover {
    color: var(--color-primary);
}

.tabs__panel--hidden {
    display: none;
}

/* ==========================================================================
   Filter Bar
   ========================================================================== */

.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar__btn {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    border: 2px solid #ccc;
    background: var(--color-white);
    color: #333;
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.15s;
    font-family: inherit;
}

.filter-bar__btn:hover {
    border-color: var(--color-primary);
}

.filter-bar__btn--active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white);
}

/* ==========================================================================
   Charge List & Cards
   ========================================================================== */

.charge-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.charge-list__empty {
    text-align: center;
    padding: 40px;
    color: var(--color-text-secondary);
}

.charge-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 18px 22px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow);
    border-left: 4px solid;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.15s;
    cursor: pointer;
}

.charge-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.charge-card__info {
    flex: 1;
}

.charge-card__type {
    font-weight: 600;
    font-size: 16px;
    color: var(--color-text);
    margin-bottom: 4px;
}

.charge-card__meta {
    font-size: 13px;
    color: var(--color-text-light);
}

.charge-card__amount {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-right: 12px;
    white-space: nowrap;
}

/* ==========================================================================
   Charge Badge
   ========================================================================== */

.charge-badge {
    padding: 5px 14px;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    display: inline-block;
}

.charge-badge--large {
    padding: 8px 20px;
    font-size: 15px;
}

/* ==========================================================================
   History
   ========================================================================== */

.history {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}

.history__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 4px;
}

.history__subtitle {
    font-size: 14px;
    color: var(--color-text-light);
    margin: 0 0 24px;
}

.history__chart {
    margin-bottom: 24px;
    height: 320px;
}

.history__arrears {
    margin-top: 24px;
    border-top: 1px solid #eee;
    padding-top: 20px;
}

.history__arrears-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 12px;
}

.history__arrears-list {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.arrears-badge {
    background: var(--color-danger-bg);
    border: 1px solid #FFCDD2;
    border-radius: 8px;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.arrears-badge__year {
    font-weight: 600;
    color: var(--color-danger);
}

.arrears-badge__amount {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.history__no-arrears {
    color: var(--color-success);
    font-weight: 500;
}

.history__table-toggle {
    margin-top: 24px;
}

.history__table-toggle summary {
    font-size: 14px;
    color: var(--color-primary);
    cursor: pointer;
    font-weight: 500;
}

/* ==========================================================================
   History Table
   ========================================================================== */

.history-table {
    width: 100%;
    margin-top: 12px;
    border-collapse: collapse;
    font-size: 14px;
}

.history-table thead tr {
    border-bottom: 2px solid var(--color-border);
}

.history-table th {
    text-align: left;
    padding: 8px 12px;
    color: #444;
    font-weight: 600;
}

.history-table td {
    padding: 8px 12px;
}

.history-table tbody tr {
    border-bottom: 1px solid #eee;
}

/* ==========================================================================
   Charge Detail
   ========================================================================== */

.charge-detail {
    max-width: 640px;
}

.charge-detail__back {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    background: none;
    border: none;
    font-family: inherit;
}

.charge-detail__back:hover {
    text-decoration: underline;
}

.charge-detail__card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
    border-left: 4px solid;
}

.charge-detail__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.charge-detail__title {
    font-size: 24px;
    font-weight: 700;
}

.charge-detail__info {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.charge-detail__row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.charge-detail__row:last-child {
    border-bottom: none;
}

.charge-detail__row dt {
    color: var(--color-text-secondary);
    font-weight: 500;
}

.charge-detail__row dd {
    font-weight: 600;
}

.charge-detail__amount {
    font-size: 20px;
    color: var(--color-text);
}

/* ==========================================================================
   Login
   ========================================================================== */

.login {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: 40px 24px;
}

.login__card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow);
    max-width: 420px;
    width: 100%;
}

.login__title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login__subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.login__form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login__hint {
    margin-top: 24px;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.login__hint summary {
    cursor: pointer;
    color: var(--color-primary);
    font-weight: 500;
}

.login__test-users {
    list-style: none;
    margin: 8px 0;
}

.login__test-users li {
    padding: 4px 0;
}

.login__test-users code {
    background: #f0f0f0;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

/* ==========================================================================
   Form elements
   ========================================================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.form-input {
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.15s;
}

.form-input:focus {
    border-color: var(--color-primary);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-family: inherit;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    transition: opacity 0.15s;
}

.btn:hover {
    opacity: 0.9;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn--full {
    width: 100%;
}

/* ==========================================================================
   Utility classes
   ========================================================================== */

.text-right { text-align: right; }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .header__inner {
        flex-wrap: wrap;
    }

    .header__user {
        width: 100%;
        justify-content: flex-end;
        margin-top: 8px;
    }

    .status-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        padding: 20px;
    }

    .status-banner__amount {
        text-align: center;
    }

    .charge-card {
        flex-wrap: wrap;
    }

    .charge-card__amount {
        margin-right: 0;
    }

    .charge-detail__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .main {
        padding: 16px;
    }

    .tabs__tab {
        padding: 10px 16px;
        font-size: 14px;
    }

    .filter-bar__btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .status-banner__label {
        font-size: 18px;
    }

    .status-banner__amount-value {
        font-size: 22px;
    }

    .login__card {
        padding: 24px;
    }
}