.app-shell {
    min-height: calc(100vh - 96px);
    width: 100%;
    max-width: 1200px;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(22px);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.app-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
}

.app-header h1 {
    font-size: 2.4rem;
    margin: 0 0 8px 0;
    letter-spacing: -0.03em;
}

.month-picker {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.month-picker label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-muted);
}

#month-select {
    background: var(--color-bg-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 1rem;
    cursor: pointer;
    transition: border-color var(--transition), transform var(--transition);
}

#month-select:focus {
    outline: none;
    border-color: var(--color-accent);
    transform: translateY(-1px);
}

.summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.summary-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.summary-card::after {
    content: "";
    position: absolute;
    inset: 0;
    opacity: 0;
    background: radial-gradient(circle at top right, rgba(79, 70, 229, 0.3), transparent);
    transition: opacity var(--transition);
}

.summary-card:hover::after {
    opacity: 1;
}

.summary-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--color-muted);
}

.summary-value {
    font-size: 1.8rem;
    font-weight: 600;
}

#income-summary .summary-value {
    color: var(--color-income);
}

#expense-summary .summary-value {
    color: var(--color-expense);
}

#balance-summary .summary-value {
    color: var(--color-text);
}

#net-balance.negative {
    color: var(--color-expense);
}

.panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.panel {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-height: 340px;
}

.panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.panel-header h2 {
    margin: 0;
    font-size: 1.4rem;
}

.panel-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.panel-actions .btn {
    white-space: nowrap;
}

.categories {
    display: grid;
    gap: 20px;
}

.chart-wrapper {
    margin-top: 16px;
}

.chart-card {
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(148, 163, 184, 0.16);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chart-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.chart-card-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.chart-card-body {
    display: grid;
    gap: 16px;
    align-items: center;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.chart-canvas {
    position: relative;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-canvas svg {
    width: 100%;
    max-width: 260px;
    height: auto;
}

.chart-empty {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 16px;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.chart-wrapper.is-empty .chart-empty,
.chart-canvas .chart-empty:not([hidden]) {
    display: flex;
}

.chart-legend {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chart-legend-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

.chart-legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.35);
}

.chart-legend-label {
    font-weight: 500;
    color: var(--color-text);
}

.chart-legend-value {
    font-variant-numeric: tabular-nums;
    color: var(--color-text);
}

.chart-legend-percent {
    font-variant-numeric: tabular-nums;
    color: var(--color-muted);
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    .chart-card-body {
        grid-template-columns: 1fr;
    }
}

.category-card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-md);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.04);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.category-heading {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.category-title {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.category-name {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.category-total {
    display: inline-block;
    margin-top: 4px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.12);
    color: var(--color-text);
    font-size: 0.85rem;
}

.category-actions {
    display: flex;
    gap: 8px;
}

.toggle-details-btn {
    font-size: 0.85rem;
    text-transform: none;
}

.category-details {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.category-card.is-collapsed .category-details {
    display: none;
}

.category-name-input {
    background: rgba(15, 23, 42, 0.82);
    border: 1px solid rgba(79, 70, 229, 0.35);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 600;
    padding: 6px 10px;
    min-width: 160px;
}

.category-name-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.25);
}

.entry-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.entry-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    background: rgba(148, 163, 184, 0.08);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    flex-wrap: wrap;
    gap: 12px;
}

.entry-item.placeholder {
    justify-content: center;
    color: var(--color-muted);
    background: rgba(148, 163, 184, 0.06);
}

.entry-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1 1 160px;
}

.entry-label {
    font-weight: 500;
}

.entry-meta {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.entry-amount {
    font-size: 1rem;
    color: var(--color-text);
}

.entry-actions {
    display: flex;
    gap: 8px;
}

.entry-form {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 150px auto;
}

.input-group input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(15, 23, 42, 0.82);
    color: var(--color-text);
    font-size: 0.95rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.entry-amount-input {
    width: 120px;
    max-width: 140px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(79, 70, 229, 0.35);
    background: rgba(15, 23, 42, 0.82);
    color: var(--color-text);
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
}

.entry-amount-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.25);
}

.entry-amount-input.has-error {
    border-color: rgba(220, 38, 38, 0.9);
    box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.3);
}

@media (max-width: 1024px) {
    .app-shell {
        padding: 28px;
    }
}

@media (max-width: 768px) {
    .period-controls {
        align-items: flex-start;
        flex-direction: column;
    }

    .picker {
        width: 100%;
    }

    .picker-inline {
        width: 100%;
    }

    .picker-inline select {
        flex: 1 1 180px;
        min-width: 0;
    }

    .picker-inline .link-chip,
    .picker-inline .profile-btn,
    .picker-inline [data-action="logout"] {
        flex: 1 1 180px;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .panels {
        grid-template-columns: 1fr;
    }

    .entry-form {
        grid-template-columns: 1fr;
    }

    .entry-form .btn {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .entry-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .entry-meta {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .app-shell {
        padding: 22px;
        border-radius: 18px;
    }

    .app-header h1 {
        font-size: 2rem;
    }

    .summary {
        grid-template-columns: 1fr;
    }

    .picker-inline {
        flex-direction: column;
        align-items: stretch;
    }

    .picker-inline select,
    .picker-inline .link-chip,
    .picker-inline .profile-btn,
    .picker-inline [data-action="logout"] {
        width: 100%;
        flex: none;
    }

    .category-card {
        padding: 18px;
    }
}

.empty-state {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    min-height: 160px;
    border-radius: var(--radius-md);
    border: 1px dashed rgba(148, 163, 184, 0.3);
    background: rgba(15, 23, 42, 0.4);
    text-align: center;
    padding: 24px;
}

.empty-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.empty-hint {
    margin: 0;
    font-size: 0.85rem;
    opacity: 0.8;
}