/* ================================================================
   PC BOTTLENECK CALCULATOR - COMPLETE CSS
   Professional Edition - No Emojis, Clean Design
   ================================================================ */

/* ===== CSS VARIABLES ===== */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-accent: #ec4899;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

body.dark-theme {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-text: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;
    --color-border: #334155;
}

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
}

/* ===== MAIN CONTAINER ===== */
.calculator-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* ===== HEADER ===== */
.calc-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-2xl);
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.header-content {
    flex: 1;
    min-width: 250px;
}

.main-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* Theme Toggle */
.theme-toggle {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    font-size: 1.5rem;
}

.theme-toggle:hover {
    background: var(--color-bg-tertiary);
    transform: scale(1.05);
}

.theme-icon::before {
    content: '🌙';
}

body.dark-theme .theme-icon::before {
    content: '☀️';
}

/* ===== SECTIONS ===== */
.calculator-main {
    display: grid;
    gap: var(--spacing-xl);
}

.config-section,
.results-section {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-header h2 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-text);
}

.section-badge {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
}

/* ===== INPUT GROUPS ===== */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.required {
    color: var(--color-danger);
}

/* Search Container */
.select-container {
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    transition: all 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Dropdown List - FIXED FOR SHOW ALL */
.dropdown-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 320px;
    overflow-y: auto;
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    margin-top: -2px;
    z-index: 100;
    display: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.dropdown-list.active {
    display: block;
}

.dropdown-item {
    padding: var(--spacing-md);
    cursor: pointer;
    transition: background-color 0.2s;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.95rem;
}

.dropdown-item:hover {
    background: var(--color-bg-secondary);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item.no-results {
    opacity: 0.6;
    cursor: default;
    text-align: center;
    font-style: italic;
}

/* Dark Mode Dropdown */
body.dark-theme .dropdown-list {
    background: var(--color-bg-secondary);
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

body.dark-theme .dropdown-item {
    color: var(--color-text);
}

body.dark-theme .dropdown-item:hover {
    background: var(--color-bg-tertiary);
}

/* Selected Item */
.selected-item {
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.selected-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.selected-text {
    flex: 1;
    font-weight: 600;
    color: var(--color-text);
}

.change-btn {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 700;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.change-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Select Inputs */
.select-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    transition: all 0.3s;
    cursor: pointer;
}

.select-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* ===== CALCULATE BUTTON & LOADING BAR ===== */
.button-container {
    position: relative;
    margin-top: var(--spacing-xl);
}

.calculate-btn {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.calculate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.calculate-btn:active:not(:disabled) {
    transform: translateY(0);
}

.calculate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Loading Bar Under Button */
.loading-bar {
    width: 100%;
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--spacing-sm);
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
    background-size: 200% 100%;
    border-radius: var(--radius-full);
    animation: loadingProgress 2s ease-in-out forwards, shimmer 1.5s infinite;
}

@keyframes loadingProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Export Button */
.export-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* ===== RESULTS ===== */
.score-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    color: white;
    margin-bottom: var(--spacing-xl);
}

.score-label {
    font-size: 1rem;
    opacity: 0.95;
    text-transform: uppercase;
    font-weight: 700;
}

.score-value {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1;
}

.score-verdict {
    font-size: 1.5rem;
    font-weight: 600;
    opacity: 0.95;
}

.score-visual {
    position: relative;
    width: 160px;
    height: 160px;
}

.score-circle {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.2);
    stroke-width: 14;
}

.circle-progress {
    fill: none;
    stroke: white;
    stroke-width: 14;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 565.48;
    transition: stroke-dashoffset 1.2s ease;
}

.circle-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    font-weight: 800;
}

/* Breakdown Grid */
.breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.breakdown-card {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.metric-bar {
    margin-bottom: var(--spacing-md);
}

.bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.bar-track {
    height: 14px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 1.2s ease;
}

.cpu-bar {
    background: linear-gradient(90deg, var(--color-primary), #818cf8);
}

.gpu-bar {
    background: linear-gradient(90deg, var(--color-accent), #f472b6);
}

.metric-info {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.info-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    font-weight: 700;
}

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

/* FPS Card */
.fps-card {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.fps-range {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.fps-value-large {
    font-size: 6rem;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.fps-label {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
    font-weight: 700;
}

.fps-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--color-border);
}

.fps-detail-item {
    text-align: center;
}

.detail-label {
    display: block;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    text-transform: uppercase;
}

.detail-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text);
}

/* Recommendations */
.recommendations-card {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.recommendation-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.recommendation-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.recommendation-text {
    flex: 1;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.recommendation-item.success {
    border-left-color: var(--color-success);
}

.recommendation-item.warning {
    border-left-color: var(--color-warning);
}

.recommendation-item.danger {
    border-left-color: var(--color-danger);
}

.recommendation-item.info {
    border-left-color: var(--color-info);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .calculator-wrapper {
        padding: var(--spacing-md);
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .score-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .score-value {
        font-size: 4rem;
    }
    
    .breakdown-grid {
        grid-template-columns: 1fr;
    }
    
    .fps-value-large {
        font-size: 4.5rem;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 1.75rem;
    }
    
    .score-value {
        font-size: 3.5rem;
    }
    
    .fps-value-large {
        font-size: 3.5rem;
    }
}

/* Scrollbar Styling */
.dropdown-list::-webkit-scrollbar {
    width: 8px;
}

.dropdown-list::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
}

.dropdown-list::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

.dropdown-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}