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

:root {
    --color-tax: #2d2d2d;
    --color-tax-light: #808080;
    --color-net: #4a9c4a;
    --color-net-light: #c8e6c8;
    --color-background: #1a1a1a;
    --color-surface: #242424;
    --color-text: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-handle: #3b82f6;
    --color-border: #404040;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.4;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Modal styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: var(--color-surface);
    border-radius: 12px;
    padding: 24px;
    max-width: 400px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h2 {
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    opacity: 0.7;
}

.close-btn:hover {
    opacity: 1;
}

/* Warning modal */
.warning-modal h2 {
    color: #f59e0b;
    margin-bottom: 16px;
}

.warning-text {
    margin-bottom: 24px;
}

.warning-text p {
    margin-bottom: 12px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Settings modal */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.setting-group select,
.setting-group input[type="number"] {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    padding: 12px;
    font-size: 16px;
    width: 100%;
}

.setting-group select:focus,
.setting-group input:focus {
    outline: none;
    border-color: var(--color-handle);
}

.toggle-group {
    display: flex;
    gap: 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.toggle-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background-color: var(--color-background);
    color: var(--color-text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.toggle-btn.active {
    background-color: var(--color-handle);
    color: var(--color-text);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    flex-direction: row;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--color-net);
}

.checkbox-label span {
    color: var(--color-text);
    font-size: 16px;
}

/* Buttons */
.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background-color: var(--color-net);
    color: var(--color-text);
    width: 100%;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* App layout */
#app {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.app-header h1 {
    font-size: 18px;
    font-weight: 600;
}

/* Summary bar */
.summary-bar {
    display: flex;
    height: 70px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 8px;
}

.summary-portion {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 8px 12px;
    min-width: 80px;
    transition: width 0.3s ease;
}

.tax-portion {
    background-color: var(--color-tax);
}

.net-portion {
    background-color: var(--color-net);
}

.summary-portion .amount {
    font-size: 16px;
    font-weight: 600;
    white-space: nowrap;
}

.summary-portion .percentage {
    font-size: 14px;
    opacity: 0.9;
}

/* Grid container */
.grid-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    touch-action: none;
}

/* Background grid */
.background-grid {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    /* height is set dynamically by JS to reserve space for employer tax */
    display: flex;
    flex-direction: column-reverse;
}

.bg-bracket {
    display: flex;
    position: relative;
    border-top: 1px solid var(--color-border);
}

.bg-bracket:first-child {
    border-top: none;
}

.bg-bracket-tax {
    background-color: var(--color-tax-light);
    display: flex;
    align-items: flex-end;
    padding: 4px 8px;
}

.bg-bracket-net {
    background-color: var(--color-net-light);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: 4px 8px;
}

.bg-bracket-rate {
    font-size: 12px;
    color: #333;
    font-weight: 500;
}

.bg-bracket-limit {
    font-size: 12px;
    color: #333;
    font-weight: 500;
}

/* Foreground grid */
.foreground-grid {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column-reverse;
    pointer-events: none;
}

.fg-section {
    display: flex;
    position: relative;
    width: 100%;
}

.fg-section-full {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4px;
    min-height: 30px;
    position: relative;
}

.fg-contributions {
    background-color: var(--color-tax);
}

.fg-relief {
    background-color: var(--color-net);
}

.fg-bracket {
    display: flex;
    width: 100%;
}

.fg-bracket-tax {
    background-color: var(--color-tax);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4px;
    position: relative;
}

.fg-bracket-net {
    background-color: var(--color-net);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4px;
}

/* Center text (label + amount in single line) */
.fg-section-center {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    white-space: nowrap;
}

/* Corner text (percentage in lower left) */
.fg-section-corner {
    position: absolute;
    bottom: 4px;
    left: 8px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.8);
}

/* Employer tax section */
.fg-employer-tax {
    background-color: var(--color-tax);
    border-bottom: 2px dashed var(--color-border);
}

/* Employer tax grid (above handle) */
.employer-tax-grid {
    position: absolute;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
    pointer-events: none;
}

/* Override min-height for elements inside employer tax grid */
.employer-tax-grid .fg-section,
.employer-tax-grid .fg-section-full {
    min-height: 0;
}

/* Income handle */
.income-handle {
    position: absolute;
    left: 0;
    right: 0;
    height: 40px;
    transform: translateY(50%);
    z-index: 100;
    cursor: grab;
    touch-action: none;
}

.income-handle:active {
    cursor: grabbing;
}

.handle-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--color-handle);
    transform: translateY(-50%);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.5);
}

.handle-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--color-handle);
    color: var(--color-text);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.5);
}

/* Responsive adjustments */
@media (max-width: 400px) {
    .summary-portion .amount {
        font-size: 14px;
    }

    .summary-portion .percentage {
        font-size: 12px;
    }

    .handle-label {
        font-size: 12px;
        padding: 5px 12px;
    }

    .fg-section-amount {
        font-size: 11px;
    }

    .fg-section-percent {
        font-size: 10px;
    }
}

/* Text is always shown, even in small sections */