/* ===== Design Tokens ===== */
:root {
    --color-booked: #4CAF50;
    --color-booked-text: #fff;
    --color-own: #388E3C;
    --color-open: #ffffff;
    --color-open-border: #ddd;
    --color-forfeited: #def01f;
    --color-primary: #1976D2;
    --color-primary-hover: #1565C0;
    --color-danger: #D32F2F;
    --color-success: #2E7D32;
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-text: #212121;
    --color-text-secondary: #666;
    --color-border: #e0e0e0;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius: 8px;
    --radius-sm: 4px;
    --spacing: 16px;
    --spacing-sm: 8px;
    --spacing-xs: 4px;
}

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

body {
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-text-size-adjust: 100%;
}

/* ===== Header & Navigation ===== */
.app-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-bar {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing);
    max-width: 800px;
    margin: 0 auto;
    gap: var(--spacing);
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-img {
    height: 32px;
    width: auto;
}

.logo-img-large {
    height: 96px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: var(--spacing);
    flex: 1;
    justify-content: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

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

.nav-link.active {
    color: var(--color-primary);
    background: rgba(25, 118, 210, 0.08);
}

.nav-link-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    color: var(--color-text-secondary);
}

/* ===== Container ===== */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing);
}

/* ===== Page Header ===== */
.page-header {
    margin-bottom: var(--spacing);
}

.page-header h1 {
    font-size: 22px;
    font-weight: 700;
}

/* ===== Session Table ===== */
.session-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.session-table thead {
    background: var(--color-bg);
}

.session-table th {
    padding: var(--spacing-sm);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    text-align: center;
}

.session-table th.date-col {
    text-align: left;
    width: 70px;
}

.session-table td {
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.date-cell {
    padding: var(--spacing-sm);
    text-align: left !important;
    white-space: nowrap;
}

.date-day {
    display: block;
    font-size: 11px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.date-full {
    font-weight: 600;
    font-size: 13px;
}

/* Spot Cells */
.spot-cell {
    padding: var(--spacing-sm) var(--spacing-xs);
    min-height: 44px;
    min-width: 44px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: opacity 0.15s;
    vertical-align: middle;
    user-select: none;
    -webkit-user-select: none;
}

.spot-cell:active {
    opacity: 0.7;
}

td.spot-booked {
    background: var(--color-booked);
    color: var(--color-booked-text);
    cursor: default;
}

td.spot-own {
    background: var(--color-own);
    color: var(--color-booked-text);
}

.spot-clickable {
    cursor: pointer;
}

td.spot-open {
    background: var(--color-open);
    border: 1px dashed var(--color-open-border);
}

td.spot-forfeited {
    background: var(--color-forfeited);
    border: 1px dashed var(--color-open-border);
}

td.spot-open:hover, td.spot-forfeited:hover {
    background: #E3F2FD;
}

.spot-plus {
    color: var(--color-open-border);
    font-size: 18px;
    font-weight: 300;
}

.spot-open:hover .spot-plus {
    color: var(--color-primary);
}

/* Beer column */
.session-table th.beer-col {
    width: 54px;
    color: var(--color-text-secondary);
}

td.spot-beer {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-size: 14px;
    border-left: 2px solid var(--color-border);
}

td.spot-beer:hover {
    background: #FFF8E1;
    color: var(--color-text);
}

/* Error row */
.error-row td {
    padding: var(--spacing-sm);
    border: none;
}

/* ===== Table Controls ===== */
.table-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background 0.15s, transform 0.1s;
    line-height: 1.4;
}

.btn:active {
    transform: scale(0.97);
}

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

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 15px;
    transition: border-color 0.15s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

/* ===== Login ===== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    padding: var(--spacing);
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 32px 24px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.login-logo {
    text-align: center;
    margin-bottom: 24px;
}

.login-title {
    text-align: center;
    font-size: 20px;
    margin-bottom: 24px;
}

/* ===== Alerts ===== */
.alert {
    padding: 10px var(--spacing);
    border-radius: var(--radius);
    margin-bottom: var(--spacing);
    font-size: 14px;
}

.alert-error {
    background: #FFEBEE;
    color: var(--color-danger);
    border: 1px solid #FFCDD2;
}

.alert-success {
    background: #E8F5E9;
    color: var(--color-success);
    border: 1px solid #C8E6C9;
}

/* ===== Cards ===== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: var(--spacing);
    margin-bottom: var(--spacing);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.card h2 {
    font-size: 17px;
    margin-bottom: var(--spacing);
}

/* ===== Ledger ===== */
.ledger-section {
    margin-bottom: 24px;
}

.ledger-section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.ledger-section-header h2 {
    font-size: 17px;
    margin-bottom: 0;
    flex: 1;
}

.ledger-section h2 {
    font-size: 17px;
    margin-bottom: var(--spacing-sm);
}

.ledger-actions-cell {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.payment-email {
    font-size: 12px;
    color: var(--color-text-secondary);
    word-break: break-all;
}

.btn-paypal {
    background: #009cde;
    color: #fff;
    border: none;
}

.btn-paypal:hover {
    background: #007ab5;
    color: #fff;
}

.inline-heading {
    display: inline;
    font-size: 17px;
}

.ledger-table,
.ledger-detail-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.ledger-table th,
.ledger-table td,
.ledger-detail-table th,
.ledger-detail-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
}

.ledger-table thead th,
.ledger-detail-table thead th {
    border-top: none;
    background: var(--color-bg);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

.amount {
    font-weight: 600;
    white-space: nowrap;
}

.ledger-details-container {
    padding: 0;
}

.entry-paid {
    opacity: 0.6;
}

.ledger-table-paid {
    opacity: 0.7;
}

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-admin {
    background: #E3F2FD;
    color: var(--color-primary);
}

.badge-paid {
    background: #E8F5E9;
    color: var(--color-success);
}

.badge-unpaid {
    background: #FFF3E0;
    color: #E65100;
}

/* ===== Users Table ===== */
.users-table {
    width: 100%;
    border-collapse: collapse;
}

.users-table th,
.users-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
}

.users-table thead th {
    border-top: none;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: var(--spacing) var(--spacing);
    color: var(--color-text-secondary);
    font-size: 13px;
    font-style: italic;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    color: var(--color-text-secondary);
    padding: 24px;
    font-style: italic;
}

/* ===== Desktop Enhancements ===== */
@media (min-width: 768px) {
    body {
        font-size: 16px;
    }

    .container {
        padding: 24px;
    }

    .session-table th,
    .session-table td {
        padding: 12px;
    }

    .spot-cell {
        font-size: 14px;
        padding: 12px 8px;
    }

    .date-cell {
        width: 90px;
    }

    .form-inline {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr auto;
        gap: var(--spacing);
        align-items: end;
    }

    .form-inline .form-group {
        margin-bottom: 0;
    }

    .form-inline .btn {
        height: 42px;
    }
}

/* ===== Mobile Card View ===== */

/*
 * The existing spot colour classes are scoped to `td` elements (e.g. `td.spot-booked`).
 * Cards use `div` elements for spots, so we add equivalent `div` selectors here.
 * All other base styles (.spot-cell, .spot-clickable, .spot-plus) apply to any element.
 */
div.spot-booked {
    background: var(--color-booked);
    color: var(--color-booked-text);
    cursor: default;
}

div.spot-own {
    background: var(--color-own);
    color: var(--color-booked-text);
}

div.spot-open {
    background: var(--color-open);
    border: 1px dashed var(--color-open-border);
}

div.spot-forfeited {
    background: var(--color-forfeited);
    border: 1px dashed var(--color-open-border);
}

div.spot-open:hover,
div.spot-forfeited:hover {
    background: #E3F2FD;
}

/* Card-level spot adjustments */
.session-card .spot-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    text-align: center;
    width: 100%;
    min-height: 52px;
}

.session-card .card-header {
    font-size: 0.9rem;
    padding: 8px 12px;
}

/* Beer payer trigger in card header */
.beer-payer-cell {
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    user-select: none;
    -webkit-user-select: none;
}

.beer-payer-cell:hover {
    color: var(--color-text);
}

/* ===== Buttons (extended) ===== */
.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
    border-radius: var(--radius-sm);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover {
    background: #b71c1c;
}

/* ===== Editable Table Cells ===== */
.editable-cell {
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.editable-cell:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.cell-input,
.cell-select {
    width: 100%;
    padding: 4px 6px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13px;
    outline: none;
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.15);
}

.cell-error {
    display: block;
    color: var(--color-danger);
    font-size: 11px;
    margin-top: 2px;
}

/* ===== Inline Cell Edit Form ===== */
.cell-edit-form {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cell-edit-actions {
    display: flex;
    gap: 4px;
}

.btn-cell-save,
.btn-cell-cancel {
    padding: 2px 8px;
    font-size: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    line-height: 1.4;
}

.btn-cell-save {
    background: var(--color-success);
    border-color: var(--color-success);
    color: #fff;
}

.btn-cell-save:hover {
    background: #1b5e20;
}

.btn-cell-cancel {
    background: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text-secondary);
}

.btn-cell-cancel:hover {
    background: var(--color-bg);
}

/* ===== HTMX Loading States ===== */
.htmx-request {
    opacity: 0.6;
    transition: opacity 0.2s;
}

.htmx-swapping {
    opacity: 0.5;
}