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

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --font-family: 'Vazirmatn', sans-serif;
}

.dark-mode {
    --primary: #60a5fa;
    --primary-dark: #3b82f6;
    --secondary: #a78bfa;
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

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

/* Header */
.header {
    background-color: var(--bg-card);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon i {
    font-size: 1.5rem;
    color: var(--primary);
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.logo-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background-color: var(--bg-secondary);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.icon-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.badge {
    position: absolute;
    top: -5px;
    left: -5px;
    background-color: var(--primary);
    color: white;
    font-size: 0.75rem;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr 2fr;
    }
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2,
.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.card-body {
    padding: 1.5rem;
}

/* Controls Panel */
.section {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.section:last-child {
    border-bottom: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.range-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.target-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.range-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--border-color);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.2s;
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.range-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.2s;
}

.range-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
}

/* Target Input Styles - بهبود یافته */
.target-input-container {
    margin-top: 1rem;
}

.input-with-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.number-input-wrapper {
    text-align: center;
    position: relative;
}

.target-input {
    width: 140px;
    height: 70px;
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    color: var(--primary);
    padding: 0.5rem;
    transition: all 0.2s;
    font-family: var(--font-family);
    direction: ltr; /* برای نمایش صحیح اعداد */
}

.target-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    background-color: var(--bg-primary);
}

.target-input:hover {
    border-color: var(--gray-400);
}

/* مخفی کردن دکمه‌های بالا/پایین در input number */
.target-input::-webkit-inner-spin-button,
.target-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.target-input {
    -moz-appearance: textfield;
    appearance: textfield;
}

.target-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.circle-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.circle-btn:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.circle-btn:active {
    transform: scale(0.95);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    border: none;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

.btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--secondary);
    border: 2px solid rgba(139, 92, 246, 0.3);
}

.btn-outline:hover {
    background-color: rgba(139, 92, 246, 0.1);
    border-color: var(--secondary);
    transform: translateY(-1px);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

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

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-1px);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Stats */
.stats-section {
    border-top: 1px solid var(--border-color);
}

.stats-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.stats-title i {
    color: var(--primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.stat-item {
    background-color: var(--bg-secondary);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.2s;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.unique-stat {
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.2s;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.unique-stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.stat-unique-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-unique-value span:last-child {
    color: var(--text-secondary);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1rem;
}

@media (min-width: 640px) {
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .results-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.result-item {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.3s;
}

.result-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

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

.result-label {
    font-weight: 600;
    color: var(--text-primary);
}

.result-range {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.result-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
    margin-bottom: 1rem;
}

.result-progress {
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.result-progress-bar {
    height: 100%;
    background-color: var(--primary);
    border-radius: 3px;
    transition: width 0.5s;
}

.result-footer {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state i {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Validation Summary */
.validation-summary {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-top: 1.5rem;
    transition: all 0.3s;
}

.dark-mode .validation-summary {
    background: linear-gradient(135deg, rgba(52, 211, 153, 0.1) 0%, rgba(52, 211, 153, 0.05) 100%);
    border-color: rgba(52, 211, 153, 0.2);
}

.validation-summary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.validation-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

@media (max-width: 768px) {
    .validation-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
}

.validation-icon {
    font-size: 1.5rem;
    color: var(--success);
}

.validation-text h4 {
    font-weight: 600;
    color: var(--success);
    margin-bottom: 0.25rem;
}

.validation-text p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.validation-equation {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--success);
    text-align: left;
    font-family: 'Vazirmatn', 'Courier New', monospace;
    background-color: rgba(16, 185, 129, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid rgba(16, 185, 129, 0.2);
    direction: ltr; /* این خط اضافه شد */
    text-align: center; /* این خط اضافه شد */
}
}

@media (max-width: 768px) {
    .validation-equation {
        text-align: center;
        font-size: 1rem;
        direction: ltr;
        word-break: break-all;
    }
}
}

@media (max-width: 768px) {
    .validation-equation {
        text-align: center;
        font-size: 1rem;
    }
}

/* Constraints Table */
.table-container {
    overflow-x: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

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

.constraints-table thead {
    background-color: var(--bg-secondary);
}

.constraints-table th {
    padding: 1rem;
    text-align: right;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.constraints-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: all 0.2s;
}

.constraints-table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.constraints-table td {
    padding: 1rem;
    color: var(--text-primary);
}

.min-badge, .max-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.875rem;
}

.min-badge {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.max-badge {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.range-visual {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.range-bar {
    flex: 1;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.range-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

.range-value {
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
}

.allowed-score {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .target-input {
        width: 120px;
        height: 60px;
        font-size: 2rem;
    }
    
    .circle-btn {
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
    
    .constraints-table {
        font-size: 0.875rem;
    }
    
    .constraints-table th,
    .constraints-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--bg-card);
    border-radius: 1rem;
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: all 0.2s;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: calc(80vh - 130px);
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

/* History Modal */
.history-item {
    background-color: var(--bg-secondary);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border-color);
}

.history-item:hover {
    background-color: var(--border-color);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.history-sum {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
}

.history-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.history-values {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.history-value-item {
    text-align: center;
}

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

.history-value {
    font-weight: 600;
    color: var(--text-primary);
}

.empty-history {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
}

.empty-history i {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Settings Modal */
.setting-item {
    margin-bottom: 1.5rem;
}

.setting-item label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.setting-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--border-color);
    border-radius: 3px;
    margin-bottom: 0.5rem;
    cursor: pointer;
}

.setting-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 3px solid var(--bg-card);
    cursor: pointer;
    transition: all 0.2s;
}

.setting-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.setting-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary);
    border: 3px solid var(--bg-card);
    cursor: pointer;
    transition: all 0.2s;
}

.setting-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
}

.setting-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.footer-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
    opacity: 0.75;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Focus styles for accessibility */
:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Responsive adjustments for small screens */
@media (max-width: 640px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo-section {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .header-controls {
        justify-content: center;
    }
    
    .content-grid {
        gap: 1rem;
    }
    
    .target-input {
        width: 100px;
        height: 50px;
        font-size: 1.75rem;
    }
    
    .circle-btn {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.dark-mode ::-webkit-scrollbar-track {
    background: var(--gray-800);
}

.dark-mode ::-webkit-scrollbar-thumb {
    background: var(--gray-600);
}

.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}