:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-blue: #38bdf8;
    --accent-green: #34d399;
    --accent-orange: #fb923c;
    --accent-purple: #c084fc;
    --accent-pink: #f472b6;
    --accent-yellow: #facc15;
    --gradient-header: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --shadow-glow: 0 10px 30px -10px rgba(56, 189, 248, 0.2);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    padding: 24px;
    min-height: 100vh;
}

.app-container {
    max-width: 1320px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header Styling */
.main-header {
    background: var(--gradient-header);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    box-shadow: var(--shadow-glow);
}

.header-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.main-header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.main-header h1 span {
    color: var(--accent-blue);
}

.main-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-top: 6px;
}

.header-stats {
    display: flex;
    gap: 16px;
}

.stat-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    min-width: 170px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-blue);
}

.stat-card.primary {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(52, 211, 153, 0.1) 100%);
    border-color: rgba(56, 189, 248, 0.4);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
}

.stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: #ffffff;
    margin: 4px 0;
}

.stat-value small {
    font-size: 0.9rem;
    color: var(--accent-blue);
}

.stat-sub {
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: 500;
}

/* Tabs Styling */
.nav-tabs {
    display: flex;
    gap: 12px;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    background: var(--accent-blue);
    color: #0f172a;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.4);
}

/* Content Area */
.tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 24px;
}

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

.card-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: #ffffff;
}

/* Grids */
.grid-2col {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 24px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th, td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.table-input {
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 10px;
    border-radius: 6px;
    width: 90px;
    font-size: 0.9rem;
    font-weight: 600;
}

.table-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.category-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent-blue);
    color: #0f172a;
    border: none;
}

.btn-primary:hover {
    background: #0284c7;
    color: #ffffff;
}

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

.btn-secondary:hover {
    color: var(--text-main);
    border-color: var(--text-muted);
}

/* Chart Canvas */
.chart-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}

.category-legend {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 16px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* Menu Tab */
.day-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.day-selector select {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
}

.menu-display {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.meal-box {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
}

.meal-box:hover {
    border-color: var(--accent-blue);
}

.meal-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--accent-blue);
    font-weight: 700;
    margin-bottom: 8px;
}

.meal-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 10px;
}

.meal-ingredients {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.recipe-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
}

.recipe-card h4 {
    color: var(--accent-green);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

/* Todolist */
.progress-bar-container {
    background: rgba(15, 23, 42, 0.8);
    height: 10px;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    transition: width 0.4s ease;
}

.todolist-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 14px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.todo-item:hover {
    background: rgba(15, 23, 42, 0.8);
}

.todo-item.completed span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-green);
}

/* Footer */
.main-footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-2col {
        grid-template-columns: 1fr;
    }
    .main-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .menu-display {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .header-stats {
        flex-direction: column;
        width: 100%;
    }
    .menu-display {
        grid-template-columns: 1fr;
    }
}