* {
    box-sizing: border-box;
}

:root {
    --bg-body: #f6f7f9;
    --text-main: #202430;
    --bg-header: #1f2937;
    --text-header: #ffffff;
    --text-header-link: #e5e7eb;
    --bg-card: #ffffff;
    --border-input: #d0d7de;
    --border-table: #e5e7eb;
    --btn-primary: #2563eb;
    --btn-danger: #b91c1c;
    --total-text: #1f2937;
    --flash-success-bg: #dcfce7;
    --flash-success-text: #166534;
    --flash-error-bg: #fee2e2;
    --flash-error-text: #991b1b;
}

html[data-theme="dark"] {
    --bg-body: #0f172a;
    --text-main: #e5e7eb;
    --bg-header: #020617;
    --text-header: #e5e7eb;
    --text-header-link: #cbd5e1;
    --bg-card: #111827;
    --border-input: #334155;
    --border-table: #334155;
    --btn-primary: #3b82f6;
    --btn-danger: #dc2626;
    --total-text: #f8fafc;
    --flash-success-bg: #14532d;
    --flash-success-text: #bbf7d0;
    --flash-error-bg: #7f1d1d;
    --flash-error-text: #fecaca;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
}

header {
    background: var(--bg-header);
    color: var(--text-header);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

header a {
    color: var(--text-header-link);
    margin-left: 1rem;
    text-decoration: none;
}

main {
    max-width: 1200px;
    margin: 1rem auto;
    padding: 0 1rem 2rem;
}

.card {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0.75rem;
    align-items: end;
}

label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.92rem;
}

input,
select,
button {
    padding: 0.45rem 0.55rem;
    border: 1px solid var(--border-input);
    border-radius: 7px;
}

input,
select {
    background: var(--bg-card);
    color: var(--text-main);
}

button {
    cursor: pointer;
    background: var(--btn-primary);
    color: white;
    border: none;
}

button.danger {
    background: var(--btn-danger);
}

.theme-toggle {
    padding: 0.45rem 0.7rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    border-bottom: 1px solid var(--border-table);
    text-align: left;
    padding: 0.55rem;
    vertical-align: top;
}

.action-row {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.board-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.85rem;
}

.board-tile {
    border: 1px solid var(--border-table);
    border-radius: 10px;
    padding: 0.8rem;
    background: var(--bg-card);
}

.board-tile.board-idle {
    border: 2px solid #16a34a;
}

.board-tile.board-active {
    border: 2px solid #dc2626;
}

.board-meta h3 {
    margin: 0 0 0.35rem;
}

.board-meta p {
    margin: 0.2rem 0;
}

.board-actions {
    margin-top: 0.55rem;
}

.board-actions form {
    width: 100%;
}

.start-rental-form {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.start-rental-form select {
    width: 100%;
}

.start-row {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 0.45rem;
    align-items: center;
}

.start-row input {
    width: 100%;
}

.control-buttons {
    margin-top: 0.55rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.45rem;
}

.control-buttons form,
.control-buttons button {
    width: 100%;
}

@media (max-width: 1100px) {
    .board-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .board-grid {
        grid-template-columns: 1fr;
    }
}

.scan-add-form {
    display: flex;
    gap: 0.45rem;
    flex-wrap: wrap;
    align-items: center;
}

.scan-controls {
    display: flex;
    gap: 0.6rem;
    align-items: end;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
}

.card h3 {
    margin: 0.3rem 0 0.5rem;
}

.total-amount {
    font-weight: 700;
    color: var(--total-text);
}

.scan-add-form input,
.scan-add-form select {
    min-width: 120px;
}

.flash-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
}

.flash {
    border-radius: 8px;
    padding: 0.55rem 0.7rem;
    margin-bottom: 0.5rem;
}

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

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

.venue-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
}

.venue-big-number {
    margin: 0.3rem 0 0;
    font-size: 2rem;
    font-weight: 700;
}

.venue-module-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.venue-module {
    display: block;
    border: 1px solid var(--border-table);
    border-radius: 10px;
    padding: 0.85rem;
    text-decoration: none;
    color: var(--text-main);
    background: var(--bg-card);
}

.venue-module h3 {
    margin: 0 0 0.35rem;
}

.venue-module p {
    margin: 0;
}

@media (max-width: 900px) {
    .venue-summary-grid {
        grid-template-columns: 1fr;
    }

    .venue-module-grid {
        grid-template-columns: 1fr;
    }
}