:root {
    --bg-main: #080a10;
    --bg-header: #0e121d;
    --bg-card: #121726;
    --bg-card-hover: #182035;
    
    --border-color: #243048;
    --border-glow: #ff5500;

    --text-main: #f0f4f8;
    --text-muted: #8597b5;
    --text-secondary: #94a3b8;
    --text-orange: #ff5500;
    --text-yellow: #ffb700;
    --text-cyan: #00f0ff;
    --text-red: #ff2a55;
    --text-green: #00ff88;

    --color-cpu: #ff5500;
    --color-gpu: #00f0ff;
    --color-ram: #ffb700;
    --color-ssd: #00ff88;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', '맑은 고딕', 'Apple SD Gothic Neo', sans-serif;
    --font-mono: 'Cascadia Code', Consolas, 'Courier New', monospace;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

.occt-app-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

/* Sidebar Navigation */
.sidebar {
    width: 275px;
    background: var(--bg-header);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 22px 16px;
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
    padding: 14px;
    background: linear-gradient(135deg, rgba(255, 85, 0, 0.15), rgba(0, 240, 255, 0.08));
    border: 1px solid var(--text-orange);
    border-radius: 8px;
    box-shadow: 0 0 16px rgba(255, 85, 0, 0.2);
}

.brand-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--text-orange), #b32d00);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 0 14px rgba(255, 85, 0, 0.6);
}

.brand-text h2 {
    font-size: 1.15rem;
    color: var(--text-orange);
    letter-spacing: 1px;
}

.brand-text p {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-cyan);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 16px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer !important;
    pointer-events: auto !important;
    position: relative;
    z-index: 10;
    transition: all 0.2s ease;
    text-align: left;
    outline: none;
    user-select: none;
}

.nav-item:hover {
    background: var(--bg-card);
    color: #ffffff;
    border-color: var(--border-color);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(255, 85, 0, 0.2), rgba(255, 85, 0, 0.02));
    color: var(--text-orange);
    border: 1px solid var(--text-orange);
    box-shadow: inset 0 0 12px rgba(255, 85, 0, 0.25);
}

.nav-item.nav-item-highlight {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(168, 85, 247, 0.15));
    border: 1px solid var(--text-cyan);
    color: #ffffff;
}

.sidebar-footer {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.system-status {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-green);
    box-shadow: 0 0 8px var(--text-green);
}

.status-info {
    display: flex;
    flex-direction: column;
}

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

.status-val {
    font-size: 0.82rem;
    font-weight: bold;
    color: var(--text-orange);
}

/* Main Content Area */
.main-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

/* Header Bar */
.top-bar {
    padding: 20px 30px;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.header-title h1 {
    font-size: 1.35rem;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.header-title p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.action-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 10px 18px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer !important;
    pointer-events: auto !important;
    position: relative;
    z-index: 10;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    outline: none;
    user-select: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--text-orange), #c43c00);
    color: #ffffff;
    box-shadow: 0 0 12px rgba(255, 85, 0, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #ff6a1a, #e04400);
    box-shadow: 0 0 18px rgba(255, 85, 0, 0.6);
}

.btn-secondary {
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-muted);
}

.btn-danger {
    background: linear-gradient(135deg, #ff2a55, #b30024);
    color: #ffffff;
}

.btn-3dmark-all {
    background: linear-gradient(135deg, #ff5500, #ffb700);
    color: #000000;
    font-weight: 800;
}

.btn-3dmark-gpu {
    background: linear-gradient(135deg, #00f0ff, #a855f7);
    color: #000000;
    font-weight: 800;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.78rem;
}

.full-btn {
    width: 100%;
}

/* Telemetry Gauges Grid */
.telemetry-bar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    padding: 20px 30px 0 30px;
}

.gauge-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    position: relative;
    overflow: hidden;
}

.gauge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.gauge-card.cpu::before { background: var(--color-cpu); }
.gauge-card.gpu::before { background: var(--color-gpu); }
.gauge-card.ram::before { background: var(--color-ram); }
.gauge-card.ssd::before { background: var(--color-ssd); }

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

.gauge-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.gauge-val {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 800;
}

.gauge-val.cpu { color: var(--color-cpu); }
.gauge-val.gpu { color: var(--color-gpu); }
.gauge-val.ram { color: var(--color-ram); }
.gauge-val.ssd { color: var(--color-ssd); }

.progress-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 3px;
}

.progress-bar.cpu { background: var(--color-cpu); }
.progress-bar.gpu { background: var(--color-gpu); }
.progress-bar.ram { background: var(--color-ram); }
.progress-bar.ssd { background: var(--color-ssd); }

/* Main Tab Panes Container */
.content-body {
    padding: 20px 30px 30px 30px;
    flex: 1;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.25s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Panel Card */
.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 22px;
    margin-bottom: 20px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

.panel-header h3 {
    font-size: 1.1rem;
    color: #ffffff;
}

.badge {
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 700;
}

.badge.info {
    background: rgba(0, 240, 255, 0.15);
    color: var(--text-cyan);
    border: 1px solid var(--text-cyan);
}

.badge.pass {
    background: rgba(0, 255, 136, 0.15);
    color: var(--text-green);
    border: 1px solid var(--text-green);
}

.wiz-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 18px;
    line-height: 1.6;
}

/* Controls Grid */
.control-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.custom-select, .custom-input {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 14px;
    color: var(--text-main);
    font-size: 0.88rem;
    outline: none;
}

.custom-select:focus, .custom-input:focus {
    border-color: var(--text-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.timer-display-card {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

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

.timer-value {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-yellow);
}

/* Progress Wrapper & Scan Matrix */
.ram-progress-wrapper {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.85rem;
}

.progress-status-text {
    color: var(--text-cyan);
    font-weight: 600;
}

.progress-pct {
    font-family: var(--font-mono);
    font-weight: 800;
    color: var(--text-yellow);
}

.progress-bar-track {
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    transition: width 0.1s linear;
    border-radius: 5px;
}

.progress-bar-fill.ram { background: linear-gradient(90deg, #ffb700, #ff5500); }
.progress-bar-fill.ssd { background: linear-gradient(90deg, #00ff88, #00f0ff); }

.scan-matrix-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    margin-bottom: 12px;
}

.ram-matrix-grid {
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    gap: 4px;
    margin-top: 10px;
}

.matrix-block {
    height: 14px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 2px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.matrix-block.tested { background: rgba(0, 255, 136, 0.3); border-color: var(--text-green); }
.matrix-block.active { background: var(--text-cyan); box-shadow: 0 0 8px var(--text-cyan); }

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}

.res-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    display: flex;
    flex-direction: column;
}

.res-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.res-val {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-main);
}

.res-val.green { color: var(--text-green); }
.res-val.red-text { color: var(--text-red); }
.res-val.orange-text { color: var(--text-orange); }
.res-val.yellow-text { color: var(--text-yellow); }

/* Code Banners & Log Output */
.code-banner {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 20px;
}

.code-banner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.code-snippet-box {
    background: #05070c;
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 6px;
    padding: 12px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-cyan);
    white-space: pre-wrap;
    word-break: break-all;
}

.log-output-box {
    background: #05070c;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    height: 180px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 20px;
}

.log-line {
    margin-bottom: 4px;
    line-height: 1.4;
}

/* Event Log Preset Buttons */
.preset-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.btn-preset {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.8rem;
    padding: 8px 12px;
    border-radius: 6px;
}

.btn-preset:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-cyan);
}

.file-drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    margin-bottom: 12px;
    background: rgba(0, 0, 0, 0.2);
}

.custom-textarea {
    width: 100%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    resize: vertical;
    outline: none;
}

.custom-textarea:focus {
    border-color: var(--text-cyan);
}

/* Chart Canvas Container */
.chart-container {
    width: 100%;
    background: #05070c;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 100%;
    max-width: 650px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-close-btn:hover {
    color: #ffffff;
}

.modal-footer {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}