:root {
    --color-bg: #f4f6f9;
    --color-surface: #ffffff;
    --color-border: #e3e7ee;
    --color-text-primary: #1b2333;
    --color-text-secondary: #6b7385;
    --color-primary: #2f6fed;
    --color-primary-dark: #1f52c0;
    --color-success: #1f9d55;
    --color-success-bg: #e7f8ee;
    --color-error: #d64545;
    --color-error-bg: #fdeaea;
    --color-warning: #b98900;
    --color-warning-bg: #fbf1d9;
    --sidebar-width: 240px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 2px 10px rgba(20, 28, 46, 0.06);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text-primary);
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* Login page */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1f52c0 0%, #2f6fed 45%, #6ea0ff 100%);
    padding: 24px;
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 50px rgba(15, 26, 60, 0.25);
}

.login-brand {
    text-align: center;
    margin-bottom: 28px;
}

.login-brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.login-brand h1 {
    font-size: 20px;
    margin: 0 0 4px;
}

.login-subtitle {
    color: var(--color-text-secondary);
    margin: 0;
    font-size: 14px;
}

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

.login-form label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-top: 10px;
}

.login-form input {
    padding: 11px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 15px;
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.15);
}

.primary-button {
    margin-top: 20px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    transition: background 0.15s ease;
}

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

.secondary-button {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
}

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

/* App shell */

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: #151d33;
    color: #fff;
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 8px 24px;
    font-weight: 700;
    font-size: 16px;
}

.sidebar-brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--color-primary);
    font-size: 15px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
}

.sidebar-link {
    padding: 11px 12px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: #c3cadd;
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}

.sidebar-link.is-active {
    background: var(--color-primary);
    color: #fff;
}

.sidebar-logout-form {
    margin-top: auto;
}

.sidebar-logout-button {
    width: 100%;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #c3cadd;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
}

.sidebar-logout-button:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}

.main-content {
    flex-grow: 1;
    padding: 28px 36px 48px;
    max-width: 1200px;
}

.main-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 20px;
}

.main-header h1 {
    font-size: 22px;
    margin: 0;
}

.logged-in-as {
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* Flash & inline form messages */

.flash-message {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    font-size: 14px;
    font-weight: 500;
}

.flash-message--success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.flash-message--error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.modal-form-error,
.modal-form-success {
    font-size: 13px;
    font-weight: 600;
    min-height: 18px;
    margin-top: 4px;
}

.modal-form-error {
    color: var(--color-error);
}

.modal-form-success {
    color: var(--color-success);
}

/* Summary cards */

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.summary-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.summary-card--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
}

.summary-card-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 600;
}

.summary-card--primary .summary-card-label {
    color: rgba(255, 255, 255, 0.8);
}

.summary-card-value {
    font-size: 24px;
    font-weight: 700;
}

/* Goal progress */

.goal-progress-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: var(--shadow-card);
    margin-bottom: 28px;
}

.goal-progress-header {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
}

.goal-progress-bar {
    height: 12px;
    border-radius: 999px;
    background: var(--color-bg);
    overflow: hidden;
}

.goal-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), #6ea0ff);
    border-radius: 999px;
    transition: width 0.3s ease;
}

.goal-progress-percent {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 600;
}

/* Export actions */

.export-actions-section {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.export-action-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    flex-shrink: 0;
}

.export-action-button.is-generating {
    opacity: 0.65;
    pointer-events: none;
}

/* Donations table */

.donations-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 20px 24px 8px;
}

.donations-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.donations-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.donations-filters input,
.donations-filters select {
    padding: 9px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 14px;
}

.donations-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.donations-table th {
    text-align: left;
    color: var(--color-text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}

.donations-table td {
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
}

.donations-table-empty {
    text-align: center;
    color: var(--color-text-secondary);
    padding: 32px 0;
}

.donations-table-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.table-action-button {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.table-action-button:hover {
    background: var(--color-bg);
}

.table-action-button--danger {
    color: var(--color-error);
    border-color: rgba(214, 69, 69, 0.3);
}

.table-action-button--danger:hover {
    background: var(--color-error-bg);
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}

.status-badge--cash {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.status-badge--bank_transfer {
    background: #e6effe;
    color: var(--color-primary-dark);
}

.status-badge--pending {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Modal */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 20, 35, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

.modal-overlay[hidden] {
    display: none;
}

.modal-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 24px 60px rgba(15, 20, 35, 0.3);
}

.modal-card h2 {
    margin: 0 0 18px;
    font-size: 18px;
}

.modal-card form {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.modal-card label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-top: 10px;
}

.modal-card input,
.modal-card select {
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 14px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* Settings page */

.settings-section {
    display: flex;
}

.settings-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 24px 28px;
    width: 100%;
    max-width: 480px;
}

.settings-card h2 {
    margin: 0 0 8px;
    font-size: 18px;
}

.settings-card-description {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin: 0 0 18px;
}

.settings-form {
    display: flex;
    flex-direction: column;
}

.settings-form label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.settings-form input {
    padding: 11px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 15px;
}

@media (max-width: 720px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        flex-direction: row;
        align-items: center;
        padding: 12px 16px;
    }

    .sidebar-nav {
        flex-direction: row;
    }

    .sidebar-logout-form {
        margin-top: 0;
        margin-left: auto;
    }

    .sidebar-brand {
        padding-bottom: 0;
    }

    .main-content {
        padding: 20px;
    }
}