:root {
    --neon-orange: #FF6B35;
    --neon-orange-light: #FF8C5A;
    --neon-orange-dark: #E55A2B;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-card: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #4A5568;
    --border-color: #E2E8F0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg-primary: #0A0A0A;
    --bg-secondary: #1A1A1A;
    --bg-card: #1F1F1F;
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --border-color: #2D3748;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

body.body-tracker-page {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

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

/* Header Section */
.tracker-header {
    margin-bottom: 2rem;
    text-align: center;
}

.tracker-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--neon-orange), var(--neon-orange-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.tracker-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Overview Cards */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(255, 107, 53, 0.1);
    color: var(--neon-orange);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.2rem 0;
}

.stat-change {
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-change.positive { color: #10B981; }
.stat-change.negative { color: #EF4444; }
.stat-change.neutral { color: var(--text-secondary); }

/* Tabs */
.tracker-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    padding-bottom: 5px;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.tab-btn:hover {
    border-color: var(--neon-orange);
    color: var(--neon-orange);
}

.tab-btn.active {
    background: var(--neon-orange);
    color: white;
    border-color: var(--neon-orange);
}

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

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Log Form */
.log-form-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.form-section-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 0.8rem;
    padding-right: 3rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--neon-orange);
}

.unit-label {
    position: absolute;
    right: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
}

.photo-upload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.photo-upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.photo-upload-box:hover {
    border-color: var(--neon-orange);
    background: rgba(255, 107, 53, 0.05);
}

.photo-upload-box i {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.photo-upload-box span {
    color: var(--text-secondary);
    font-weight: 600;
}

.photo-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.btn-primary {
    background: var(--neon-orange);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    width: 100%;
    transition: background 0.3s ease;
}

.btn-primary:hover {
    background: var(--neon-orange-dark);
}

/* Charts Section */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.chart-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

/* Photo Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.gallery-date {
    padding: 0.8rem;
    background: var(--bg-secondary);
    font-weight: 600;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.gallery-photos {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2px;
}

.gallery-photos img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    cursor: pointer;
}

/* History Table */
.history-table-container {
    background: var(--bg-card);
    border-radius: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

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

.history-table th,
.history-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-secondary);
}

.history-table tr:hover {
    background: var(--bg-secondary);
}

.action-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 5px;
    transition: color 0.2s;
}

.action-btn:hover {
    color: var(--neon-orange);
}

.action-btn.delete:hover {
    color: #EF4444;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--border-color);
}

/* Responsive */
@media (max-width: 768px) {
    .tracker-header h1 {
        font-size: 2rem;
    }

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

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

    .photo-upload-grid {
        grid-template-columns: 1fr;
    }
}