:root {
    /* Brand Colors - Light Theme */
    --primary: #ea580c;
    --primary-hover: #c2410c;
    --primary-pulse: rgba(234, 88, 12, 0.4);

    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #f1f5f9;
    --bg-hover: #e2e8f0;

    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-glass: 0 4px 30px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    /* Dark Theme (Default per spec) */
    --primary: #f97316;
    --primary-hover: #ea580c;
    --primary-pulse: rgba(249, 115, 22, 0.3);

    --bg-main: #1a1a2e;
    /* From Spec */
    --bg-card: #23233b;
    --bg-sidebar: #151525;
    --bg-hover: #2d2d4a;

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #313155;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-glass: 0 4px 30px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
}

.text-danger {
    color: var(--danger);
}

.justify-center {
    justify-content: center !important;
}

.hidden {
    display: none !important;
}

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ------------------------
   Sidebar
   ------------------------ */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: background-color 0.3s, border-color 0.3s;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    color: var(--primary);
    font-size: 1.25rem;
}

.logo h1 {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}

.nav-links {
    list-style: none;
    padding: 0 0.75rem;
    flex: 1;
}

.nav-links li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-links li:hover {
    background-color: var(--bg-hover);
    color: var(--text-main);
}

.nav-links li.active {
    background-color: var(--primary-pulse);
    color: var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
}

/* ------------------------
   Main Content Layout
   ------------------------ */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* Timer Bar */
.active-timer-bar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    z-index: 5;
    box-shadow: var(--shadow-sm);
}

.timer-controls {
    display: flex;
    flex: 1;
    gap: 1rem;
    max-width: 800px;
}

.timer-controls select {
    width: 250px;
}

.timer-controls input {
    flex: 1;
}

.timer-display {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#current-time-display {
    font-family: 'Fira Code', monospace, sans-serif;
    /* Fallback for monospaced figures */
    font-size: 1.75rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.5px;
}

/* Dynamic Views */
#views-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* ------------------------
   Dashboard Components
   ------------------------ */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.card {
    background-color: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    margin-top: 1rem;
}

.pie-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.pie-legend {
    margin-top: 1rem;
    width: 100%;
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.5rem;
}

.alerts-container {
    margin-bottom: 1.5rem;
}

.alert-banner {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning);
    padding: 1rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-main);
}

/* ------------------------
   Tables & Lists
   ------------------------ */
.table-container {
    overflow-x: auto;
    padding: 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tbody tr {
    transition: background-color 0.2s;
}

.data-table tbody tr:hover {
    background-color: var(--bg-hover);
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.unbilled {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge.billed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.entries-tools {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* ------------------------
   UI Elements
   ------------------------ */
.input-field {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s;
    outline: none;
}

.input-field:focus {
    border-color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.primary-btn:not(:disabled):hover {
    background-color: var(--primary-hover);
}

.pulse-ready {
    animation: pulseActive 2s infinite;
}

.timer-running .pulse-ready {
    background-color: var(--danger);
    animation: none;
}

@keyframes pulseActive {
    0% {
        box-shadow: 0 0 0 0 var(--primary-pulse);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(0, 0, 0, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
    }
}

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

.secondary-btn:not(:disabled):hover {
    background-color: var(--border);
}

.outline-btn {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.outline-btn:not(:disabled):hover {
    background-color: var(--bg-hover);
}

.danger-btn {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.danger-btn:not(:disabled):hover {
    background-color: var(--danger);
    color: white;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

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

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-sm {
    max-width: 350px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--text-muted);
}

.form-row {
    display: flex;
    gap: 1rem;
}

.half {
    flex: 1;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* Color Picker */
.color-picker {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s;
}

.color-swatch:hover {
    transform: scale(1.1);
}

.color-swatch.selected {
    border-color: var(--text-main);
    transform: scale(1.1);
}


/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
}

.danger-zone {
    border-color: rgba(239, 68, 68, 0.3);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-main);
    color: var(--bg-main);
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    font-weight: 500;
    box-shadow: var(--shadow-glass);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Print Styles */
@media print {

    .sidebar,
    .active-timer-bar,
    .header-action button,
    .entries-tools,
    .sidebar-footer {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .app-container {
        height: auto;
        overflow: visible;
    }

    .content-area,
    #views-container,
    .view {
        overflow: visible;
        height: auto;
    }

    .card {
        border: 1px solid #ccc !important;
        box-shadow: none !important;
        break-inside: avoid;
    }

    /* Print only Dashboard summary */
    #view-dashboard {
        display: block !important;
    }

    #view-projects,
    #view-entries,
    #view-settings {
        display: none !important;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
        flex-direction: row;
        align-items: center;
        padding: 0.5rem;
    }

    .logo h1 {
        display: none;
    }

    .nav-links {
        display: flex;
        padding: 0;
        margin-bottom: 0;
    }

    .nav-links li {
        margin-bottom: 0;
        padding: 0.5rem;
        flex: 1;
        justify-content: center;
    }

    .nav-links li span {
        display: none;
    }

    .active-timer-bar {
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
    }

    .timer-controls {
        max-width: none;
        flex-direction: column;
    }

    .timer-controls select {
        width: 100%;
    }

    .timer-display {
        justify-content: space-between;
    }

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

    .entries-tools {
        flex-direction: column;
    }
}