/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0a0e1a;
    --bg-card: #111827;
    --bg-card-alt: #0d1525;
    --primary: #ef4444;
    --primary-light: #f87171;
    --accent: #1e3a5f;
    --accent-blue: #3b82f6;
    --accent-blue-dim: #1d4ed8;
    --text: #e8edf5;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --success: #22c55e;
    --success-dim: #16a34a;
    --warning: #f59e0b;
    --border: #1e293b;
    --glow-red: rgba(239, 68, 68, 0.15);
    --glow-blue: rgba(59, 130, 246, 0.1);
    --glow-green: rgba(34, 197, 94, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--bg);
    background-image: radial-gradient(ellipse at top, rgba(59,130,246,0.06) 0%, transparent 60%);
    color: var(--text);
    direction: rtl;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.screen {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* === Setup Screen === */
.setup-container {
    max-width: 480px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.logo {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-top: 20px;
}

.logo-img {
    display: block;
    max-width: 380px;
    width: 92%;
    height: auto;
    margin: 16px auto 0;
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1rem;
}

.form-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.form-section h2 {
    font-size: 1.1rem;
    margin-bottom: 14px;
    color: var(--accent-blue);
}

.hint {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-group {
    flex: 1;
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
#activity-level {
    width: 100%;
    padding: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
#activity-level:focus {
    border-color: var(--primary);
}

/* Food preference chips */
.food-prefs,
.equipment-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 8px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.chip.selected {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.favorites-section .chip.selected {
    background: #f39c12;
    border-color: #f39c12;
}

.favorites-section h2 {
    color: #f39c12 !important;
}

.chip:active {
    transform: scale(0.95);
}

.btn-primary {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
}

.btn-primary:active {
    background: var(--primary-light);
}

/* === Main Screen === */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: linear-gradient(180deg, #0d1525 0%, var(--bg-card) 100%);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
}

/* Daily header */
.daily-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--accent) 60%, rgba(59,130,246,0.15) 100%);
    border-bottom: 1px solid var(--border);
}

.date-display {
    font-size: 1rem;
    color: var(--text-muted);
}

.calories-summary {
    text-align: left;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.cal-target {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-light);
}

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

/* Tabs */
.tabs {
    display: flex;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 53px;
    z-index: 99;
}

.tab {
    flex: 1;
    padding: 14px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-panel {
    display: none;
    padding: 16px;
    padding-bottom: 80px;
}

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

/* === Meals === */
.meal-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    border-right: 4px solid var(--accent-blue);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.meal-card.meal-favorite {
    border-right-color: var(--warning);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.06) 100%);
}

.meal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.meal-type {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-light);
}

.meal-calories {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: var(--bg);
    padding: 4px 10px;
    border-radius: 12px;
}

.meal-items {
    list-style: none;
}

.meal-items li {
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.meal-items li:last-child {
    border-bottom: none;
}

.meal-item-name {
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
}

.meal-item-emoji {
    font-size: 1.15rem;
    flex-shrink: 0;
}

.meal-item-amount {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.btn-swap {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background: var(--bg);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-swap:active {
    border-color: var(--primary);
    color: var(--primary);
}

/* Macros bar */
.macros-summary {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.macro-pill {
    flex: 1;
    text-align: center;
    padding: 10px 6px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
}

.macro-value {
    font-size: 1.1rem;
    font-weight: 700;
}

.macro-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.macro-protein .macro-value { color: #ef4444; }
.macro-carbs .macro-value { color: #f59e0b; }
.macro-fat .macro-value { color: #3b82f6; }

/* === Workout === */
.workout-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.workout-header h2 {
    font-size: 1.15rem;
    color: var(--primary-light);
}

.workout-progress {
    background: var(--bg-card);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.exercise-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 10px;
    transition: all 0.2s;
    border-right: 4px solid var(--accent-blue-dim);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.exercise-card.done {
    opacity: 0.5;
    border-right-color: var(--success);
}

.exercise-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.exercise-name {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.exercise-muscles {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.exercise-checkbox {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s;
}

.exercise-checkbox.checked {
    background: var(--success);
    border-color: var(--success);
}

.exercise-checkbox.checked::after {
    content: '\2713';
    color: #fff;
    font-size: 14px;
    font-weight: 700;
}

.exercise-details {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.exercise-detail-value {
    color: var(--text);
    font-weight: 600;
}

.exercise-desc {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.5;
    display: none;
}

.exercise-card.expanded .exercise-desc {
    display: block;
}

.btn-show-desc {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.8rem;
    cursor: pointer;
    margin-top: 6px;
    padding: 0;
}

/* Rest timer */
.rest-timer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 2px solid var(--primary);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 200;
}

.timer-display {
    font-size: 2rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    color: var(--primary-light);
}

.btn-timer {
    padding: 10px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

/* === Progress === */
.weight-input-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
}

.weight-input-section h2 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--primary-light);
}

.weight-input-row {
    display: flex;
    gap: 10px;
}

.weight-input-row input {
    flex: 1;
    padding: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    outline: none;
}

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

.btn-small {
    padding: 12px 20px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.progress-stats {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.stat-card {
    flex: 1;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px 10px;
    text-align: center;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.chart-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
}

.chart-container h3 {
    font-size: 1rem;
    color: var(--primary-light);
    margin-bottom: 12px;
}

#weight-chart {
    width: 100%;
    height: 200px;
}

/* === Food Log === */
.food-log-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border);
}

.food-log-section h2 {
    font-size: 1.1rem;
    color: #2ecc71;
    margin-bottom: 12px;
}

.food-search-wrapper {
    position: relative;
    margin-bottom: 8px;
}

#food-search {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    outline: none;
}

#food-search:focus {
    border-color: #2ecc71;
}

.food-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    max-height: 250px;
    overflow-y: auto;
    z-index: 150;
}

.search-result-item {
    padding: 10px 16px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.search-result-item:hover,
.search-result-item:active {
    background: rgba(46, 204, 113, 0.1);
}

.search-result-name {
    font-size: 0.9rem;
}

.search-result-cal {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-custom-food {
    width: 100%;
    padding: 10px;
    background: none;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    margin-bottom: 8px;
}

.btn-custom-food:active {
    border-color: #2ecc71;
    color: #2ecc71;
}

.custom-food-form {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 12px;
    margin-bottom: 12px;
}

.custom-food-form input {
    width: 100%;
    padding: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    margin-bottom: 8px;
}

.custom-food-form input:focus {
    border-color: #2ecc71;
}

.custom-food-row {
    display: flex;
    gap: 8px;
}

.custom-food-row input {
    flex: 1;
    min-width: 0;
}

/* Food log list */
.food-log-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    border-right: 3px solid #2ecc71;
}

.food-log-info {
    flex: 1;
}

.food-log-name {
    font-size: 0.9rem;
    font-weight: 600;
}

.food-log-details {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.food-log-delete {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
}

.food-log-delete:active {
    color: var(--primary);
}

/* Daily summary bar */
.daily-summary-bar {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-top: 16px;
    border: 1px solid var(--border);
    position: sticky;
    bottom: 8px;
    z-index: 50;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.summary-item {
    text-align: center;
    flex: 1;
}

.summary-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.summary-value {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
}

.summary-of {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.summary-deficit .summary-value {
    color: #2ecc71;
}

.summary-deficit .summary-value.over-budget {
    color: #e74c3c;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: var(--bg);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: #2ecc71;
    border-radius: 3px;
    transition: width 0.3s, background 0.3s;
    width: 0%;
}

.progress-bar-fill.over {
    background: #e74c3c;
}

.food-log-empty {
    text-align: center;
    padding: 16px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* === Measurements === */
.measurements-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 16px;
    border-right: 4px solid #9b59b6;
}

.measurements-section h2 {
    font-size: 1rem;
    color: #bb6bd9;
    margin-bottom: 4px;
}

.measurements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.measure-item label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.measure-item input {
    width: 100%;
    padding: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    outline: none;
}

.measure-item input:focus {
    border-color: #9b59b6;
}

.btn-full {
    width: 100%;
    margin-top: 4px;
}

.measurements-diff {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.measure-diff-card {
    flex: 1;
    min-width: calc(50% - 4px);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 10px;
    text-align: center;
}

.measure-diff-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.measure-diff-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-light);
}

.measure-diff-change {
    font-size: 0.75rem;
    font-weight: 600;
}

.measure-diff-change.positive { color: var(--success); }
.measure-diff-change.negative { color: var(--warning); }

/* === Exercise Log (Progressive Overload) === */
.exercise-log {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.exercise-log-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.exercise-log-row input {
    width: 60px;
    padding: 6px 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.85rem;
    text-align: center;
    outline: none;
}

.exercise-log-row input:focus {
    border-color: var(--primary);
}

.exercise-log-row label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.exercise-prev {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.exercise-prev .improved {
    color: var(--success);
    font-weight: 600;
}

.btn-save-log {
    padding: 5px 12px;
    background: var(--accent);
    color: var(--text);
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
}

/* === Info Screen === */
.top-bar-buttons {
    display: flex;
    gap: 4px;
}

.info-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    z-index: 500;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.info-content {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px 16px 60px;
    position: relative;
}

.info-close {
    position: sticky;
    top: 8px;
    float: left;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.5rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.info-content h1 {
    text-align: center;
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 24px;
    padding-top: 8px;
}

.info-section {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
}

.info-section h2 {
    color: var(--primary-light);
    font-size: 1.05rem;
    margin-bottom: 10px;
}

.info-section p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.info-section p:last-child {
    margin-bottom: 0;
}

.info-section strong {
    color: var(--text);
}

.info-section ul, .info-section ol {
    padding-right: 20px;
    margin: 8px 0;
}

.info-section li {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.info-formula {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 12px;
    margin: 10px 0;
    font-size: 0.85rem;
    direction: ltr;
    text-align: left;
}

.info-formula p {
    margin-bottom: 4px;
    color: var(--text);
    font-size: 0.85rem;
}

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

.meal-card, .exercise-card {
    animation: fadeIn 0.3s ease;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }