:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-card: #1a1a1a;
    --bg-hover: #252525;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent-red: #e53935;
    --accent-red-dark: #c62828;
    --accent-red-light: #ff6f60;
    --accent-white: #ffffff;
    --accent-gray: #333333;
    --success: #4caf50;
    --warning: #ff9800;
    --border: #2a2a2a;
    --shadow: rgba(0, 0, 0, 0.5);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    padding: 1.5rem;
    border-bottom: 3px solid var(--accent-red);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-red-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.athlete-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
}

.athlete-name {
    font-weight: 600;
    color: var(--text-primary);
}

.program-badge {
    background: var(--accent-red);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation */
.nav {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.nav::-webkit-scrollbar {
    display: none;
}

.nav-btn {
    background: transparent;
    border: 2px solid var(--accent-gray);
    color: var(--text-secondary);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.nav-btn:hover {
    border-color: var(--accent-red);
    color: var(--text-primary);
}

.nav-btn.active {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: white;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

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

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

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px var(--shadow);
}

.card h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Goal Card */
.goal-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.goal-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.goal-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.goal-value {
    font-size: 1.75rem;
    font-weight: 800;
}

.goal-value.current {
    color: var(--accent-red-light);
}

.goal-value.target {
    color: var(--text-secondary);
}

.goal-progress {
    flex: 1;
    min-width: 150px;
}

.progress-bar {
    height: 12px;
    background: var(--bg-hover);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-red) 0%, var(--accent-red-light) 100%);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
    display: block;
}

.lift-goals {
    display: grid;
    gap: 1rem;
}

.lift-goal {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    align-items: center;
    gap: 1rem;
}

.lift-name {
    font-weight: 600;
    color: var(--text-secondary);
}

.mini-progress {
    height: 8px;
    background: var(--bg-hover);
    border-radius: 4px;
    overflow: hidden;
}

.mini-fill {
    height: 100%;
    background: var(--accent-red);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.lift-numbers {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: monospace;
}

/* Phase Card */
.phase-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.phase-badge {
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-red-dark) 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.week-info {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.week-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.week-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-red-light);
    line-height: 1;
}

.week-total {
    color: var(--text-muted);
    font-size: 1.2rem;
}

.compliance-tracker {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
}

.compliance-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.75rem;
}

.compliance-days {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.day {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.day.completed {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.day.pending {
    background: var(--warning);
    color: black;
    border-color: var(--warning);
}

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

/* PR Card */
.pr-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.pr-item {
    background: var(--bg-hover);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent-red);
}

.pr-item.recent {
    border-left-color: var(--accent-gray);
}

.pr-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.75rem;
}

.pr-lifts {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.pr-lift {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pr-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.pr-value {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

/* Weight Card */
.weight-display {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.weight-current {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.weight-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-red-light);
    line-height: 1;
}

.weight-unit {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.weight-change {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 1rem;
    color: var(--text-secondary);
}

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

.weight-start {
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Chart Card */
.chart-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.chart-tab {
    background: var(--bg-hover);
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.chart-tab:hover {
    background: var(--accent-gray);
    color: var(--text-primary);
}

.chart-tab.active {
    background: var(--accent-red);
    color: white;
}

canvas {
    max-height: 300px;
}

/* Sessions Card */
.sessions-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.session-item {
    background: var(--bg-hover);
    padding: 1rem;
    border-radius: var(--radius-sm);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 1rem;
    align-items: center;
}

.session-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
}

.session-day {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.session-num {
    font-size: 1.25rem;
    font-weight: 700;
}

.session-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.session-type {
    font-weight: 600;
    color: var(--text-primary);
}

.session-lifts {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.session-rpe {
    background: var(--accent-red);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Form Styles */
.workout-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-hover);
    border: 2px solid var(--accent-gray);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-red);
}

.form-group input[type="range"] {
    padding: 0.5rem 0;
}

.rpe-display {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-red-light);
}

.lifts-input {
    background: var(--bg-hover);
    padding: 1rem;
    border-radius: var(--radius-sm);
}

.lift-input-row {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.lift-input-row:last-child {
    margin-bottom: 0;
}

.lift-input-row label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    background: var(--accent-red);
    color: white;
    border: none;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: var(--accent-red-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(229, 57, 53, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-hover);
    border: 2px solid var(--accent-gray);
}

.btn-secondary:hover {
    background: var(--accent-gray);
    border-color: var(--accent-red);
}

.btn-danger {
    background: transparent;
    border: 2px solid var(--accent-red);
    color: var(--accent-red);
}

.btn-danger:hover {
    background: var(--accent-red);
    color: white;
}

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

/* Photos Tab */
.photo-upload {
    margin-bottom: 1.5rem;
}

.photo-upload input {
    display: none;
}

.upload-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bg-hover);
    border: 2px dashed var(--accent-gray);
    border-radius: var(--radius);
    padding: 2rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-btn:hover {
    border-color: var(--accent-red);
    background: var(--accent-gray);
}

.upload-icon {
    font-size: 2.5rem;
}

.photo-timeline {
    margin-bottom: 1.5rem;
}

.timeline-slider {
    background: var(--bg-hover);
    padding: 1rem;
    border-radius: var(--radius-sm);
}

.timeline-slider input[type="range"] {
    width: 100%;
    margin-bottom: 0.5rem;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.photo-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.photo-before,
.photo-after {
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.photo-label {
    display: block;
    background: var(--accent-gray);
    padding: 0.5rem;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.photo-placeholder {
    aspect-ratio: 3/4;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.5rem;
}

/* Program Tab */
.program-overview {
    margin-bottom: 2rem;
}

.phase-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 1rem 0;
}

.phase-timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gray);
    z-index: 0;
}

.phase-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
    background: var(--bg-card);
    padding: 0 0.5rem;
}

.phase-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-gray);
    border: 3px solid var(--bg-card);
}

.phase-item.active .phase-dot {
    background: var(--accent-red);
    box-shadow: 0 0 10px var(--accent-red);
}

.phase-item.completed .phase-dot {
    background: var(--success);
}

.phase-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.phase-item.active .phase-name {
    color: var(--text-primary);
}

.phase-weeks {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.week-schedule {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.schedule-day {
    display: grid;
    grid-template-columns: 100px 1fr 80px;
    gap: 1rem;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
}

.day-name {
    font-weight: 600;
    color: var(--text-secondary);
}

.day-workout {
    color: var(--text-primary);
}

.day-status {
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.day-status.completed {
    color: var(--success);
    font-weight: 600;
}

.day-status.pending {
    color: var(--warning);
    font-weight: 600;
}

/* Data Tab */
.data-actions {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.data-action {
    background: var(--bg-hover);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
}

.data-action h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.data-action p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.data-action.danger {
    border: 1px solid var(--accent-red);
}

.data-preview {
    background: var(--bg-hover);
    padding: 1rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

.data-preview pre {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }
    
    .athlete-info {
        align-items: center;
    }
    
    .goal-stats {
        flex-direction: column;
        text-align: center;
    }
    
    .lift-goal {
        grid-template-columns: 60px 1fr auto;
        gap: 0.5rem;
    }
    
    .pr-grid {
        grid-template-columns: 1fr;
    }
    
    .photo-comparison {
        grid-template-columns: 1fr;
    }
    
    .schedule-day {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }
    
    .day-status {
        text-align: left;
    }
    
    .phase-timeline {
        flex-direction: column;
        gap: 1rem;
    }
    
    .phase-timeline::before {
        display: none;
    }
    
    .phase-item {
        flex-direction: row;
        width: 100%;
        justify-content: flex-start;
        gap: 1rem;
    }
    
    .weight-display {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .weight-start {
        margin-left: 0;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-red);
}