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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #0f0f1a;
    color: #e0e0e0;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1.gradient-text {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: #888;
    font-size: 0.9rem;
}

h2 {
    font-size: 1rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

.card {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.card-label {
    display: block;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: #888;
    margin-bottom: 8px;
}

.card-value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
}

.chart-section {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.chart-section canvas {
    width: 100%;
    height: 300px;
}

.chart-row {
    display: flex;
    gap: 16px;
    margin-bottom: 30px;
}

.chart-row .chart-section {
    flex: 1;
    margin-bottom: 0;
}

.chart-section.half {
    flex: 1;
}

.form-section {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
}

input {
    background: #0f0f1a;
    border: 1px solid #2a2a4a;
    color: #fff;
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 1rem;
    flex: 1;
    min-width: 150px;
    outline: none;
}

input::placeholder {
    color: #666;
}

input:focus {
    border-color: #7c3aed;
}

.btn-gradient {
    background: linear-gradient(135deg, #7c3aed, #00d4ff);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity 0.2s;
    font-weight: 600;
}

.btn-gradient:hover {
    opacity: 0.9;
}

.entries-section, .settings-section {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

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

th, td {
    text-align: left;
    padding: 12px 10px;
    border-bottom: 1px solid #2a2a4a;
}

th {
    text-transform: uppercase;
    font-size: 0.75rem;
    color: #888;
}

.delete-btn {
    background: #ff4757;
    color: #fff;
    border: none;
    padding: 5px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
}

.delete-btn:hover {
    opacity: 0.8;
}

.settings-section label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.8rem;
    color: #888;
    flex: 1;
    min-width: 150px;
}

.settings-section input {
    min-width: unset;
    width: 100%;
}

@media (max-width: 600px) {
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .chart-row {
        flex-direction: column;
        gap: 12px;
    }
    .vitals-row {
        flex-direction: column;
        gap: 8px;
    }
    .weekly-summary {
        flex-wrap: wrap;
        gap: 8px;
    }
    .summary-item {
        min-width: calc(50% - 4px);
    }
}

/* Health Section */
.health-section {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.health-actions {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.vitals-row {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.vital-card {
    flex: 1;
    min-width: 120px;
    background: #16162a;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.vital-icon {
    font-size: 1.6rem;
    line-height: 1;
}

.vital-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.vital-label {
    font-size: 0.7rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.vital-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #e0e0e0;
}

.vital-score .vital-value {
    font-size: 1.4rem;
}

.vital-workouts .vital-value,
.vital-calories .vital-value {
    font-size: 0.95rem;
}

.weekly-summary {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 14px 16px;
    background: #16162a;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
}

.summary-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.summary-label {
    font-size: 0.65rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}

.summary-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #e0e0e0;
}

.health-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 25px;
}

.health-stats .card {
    background: #0f0f1a;
    border: 1px solid #2a2a4a;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
}

.health-stats .card-label {
    display: block;
    text-transform: uppercase;
    font-size: 0.7rem;
    color: #888;
    margin-bottom: 6px;
}

.health-stats .card-value {
    display: block;
    font-size: 1.3rem;
    font-weight: bold;
    color: #fff;
}

.health-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
}

.health-charts .chart-section {
    margin-bottom: 0;
}

.health-charts .chart-section h3 {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 12px;
}

.health-charts .chart-section canvas {
    height: 200px !important;
}

.ai-analysis-section {
    text-align: center;
}

.ai-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.btn-secondary {
    background: linear-gradient(135deg, #2a2a4a, #1a1a2e);
    border: 1px solid #2a2a4a;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #3a3a5a, #2a2a3e);
}

.loading-spinner {
    color: #00d4ff;
    margin: 20px 0;
    font-size: 0.9rem;
}

.ai-analysis-card {
    background: #0f0f1a;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 20px;
    margin-top: 15px;
    text-align: left;
    line-height: 1.7;
    color: #e0e0e0;
    max-height: 500px;
    overflow-y: auto;
}

.ai-analysis-card h1, .ai-analysis-card h2, .ai-analysis-card h3 {
    color: #00d4ff;
    margin-top: 15px;
    margin-bottom: 8px;
}

.ai-analysis-card strong {
    color: #7c3aed;
}

.ai-analysis-card ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

.ai-analysis-card li {
    margin-bottom: 5px;
}

#aiAnalyzeBtn:disabled, #aiWeeklyBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: #1a1a2e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 25px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #888;
    cursor: pointer;
}

.close-btn:hover {
    color: #fff;
}

.weekly-report {
    text-align: left;
}

.weekly-report h4 {
    color: #00d4ff;
    margin: 15px 0 8px 0;
    font-size: 0.95rem;
}

.weekly-report .stat-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #2a2a4a;
}

.weekly-report .insight {
    background: #0f0f1a;
    padding: 12px;
    border-radius: 8px;
    margin: 10px 0;
    border-left: 3px solid #7c3aed;
}

@media (max-width: 700px) {
    .health-charts {
        grid-template-columns: 1fr;
    }
    .health-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}