/* ======================================
   DANG VAN APP STYLES
   ====================================== */

.dangvan-app {
    min-height: 100vh;
    background: linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 100%);
    color: #eee;
    font-family: system-ui, -apple-system, sans-serif;
}

/* Header */
.dangvan-header {
    padding: 20px 30px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid #333;
    display: flex;
    align-items: center;
    gap: 20px;
}

.dangvan-header h1 {
    margin: 0;
    font-size: 1.5rem;
    color: #ff9f43;
}

.dangvan-header .subtitle {
    margin: 0;
    color: #888;
    font-size: 0.9rem;
}

/* Main Layout */
.dangvan-main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 20px;
    padding: 20px;
    min-height: calc(100vh - 100px);
}

@media (max-width: 1024px) {
    .dangvan-main {
        grid-template-columns: 1fr;
    }
}

/* Form Styles */
.dangvan-form {
    background: rgba(30, 30, 50, 0.8);
    border-radius: 8px;
    padding: 15px;
    border: 1px solid #333;
}

.dangvan-form h3 {
    margin: 0 0 15px;
    color: #ff9f43;
    font-size: 1.1rem;
}

/* Quick Examples */
.quick-examples {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.quick-examples span {
    color: #888;
    font-size: 0.85rem;
}

.quick-examples button {
    padding: 5px 12px;
    background: #2a2a4a;
    border: 1px solid #444;
    border-radius: 4px;
    color: #aaa;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.quick-examples button:hover {
    background: #3a3a5a;
    border-color: #ff9f43;
    color: #ff9f43;
}

/* Formula Display */
.formula-display {
    background: rgba(0, 0, 0, 0.3);
    padding: 10px;
    border-radius: 4px;
    text-align: center;
    color: #ff9f43;
    font-family: 'Courier New', monospace;
    margin-top: 10px;
}

/* Help Text */
.help-text {
    display: block;
    font-size: 0.75rem;
    color: #666;
    margin-top: 4px;
}

/* Textarea */
.dangvan-form textarea {
    width: 100%;
    padding: 10px;
    background: #1a1a2e;
    border: 1px solid #444;
    border-radius: 4px;
    color: #eee;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    resize: vertical;
    box-sizing: border-box;
}

.dangvan-form textarea:focus {
    border-color: #ff9f43;
    outline: none;
}

/* Calculation History */
.calculation-history {
    background: rgba(30, 30, 50, 0.8);
    border-radius: 8px;
    padding: 15px;
    border: 1px solid #333;
    margin-top: 20px;
}

.calculation-history h3 {
    margin: 0 0 15px;
    color: #ff9f43;
    font-size: 1rem;
}

.history-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 250px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    margin-bottom: 8px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: rgba(255, 159, 67, 0.1);
    border-color: #333;
}

.history-item.selected {
    border-color: #ff9f43;
    background: rgba(255, 159, 67, 0.15);
}

.history-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.history-params {
    font-size: 0.85rem;
    color: #eee;
}

.history-time {
    font-size: 0.75rem;
    color: #666;
}

/* Status Badge */
.status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
}

.status-badge.safe {
    background: rgba(0, 255, 136, 0.2);
    color: #00ff88;
}

.status-badge.unsafe {
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
}

/* Chart */
.dangvan-chart {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.dangvan-chart canvas {
    width: 100%;
    height: 100%;
    min-height: 400px;
    background: #1a1a2e;
    border-radius: 8px;
}

.chart-help {
    padding: 8px;
    text-align: center;
    color: #666;
    font-size: 0.85rem;
}

/* Results Panel */
.results-panel {
    border-top: 1px solid #333;
}

.result-summary {
    padding: 15px;
    text-align: center;
}

.result-summary.safe {
    background: rgba(0, 255, 136, 0.1);
}

.result-summary.unsafe {
    background: rgba(255, 107, 107, 0.1);
}

.result-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.status-icon {
    font-size: 1.5rem;
    font-weight: bold;
}

.result-summary.safe .status-icon {
    color: #00ff88;
}

.result-summary.unsafe .status-icon {
    color: #ff6b6b;
}

.status-text {
    font-size: 1.1rem;
    font-weight: 500;
}

.result-summary.safe .status-text {
    color: #00ff88;
}

.result-summary.unsafe .status-text {
    color: #ff6b6b;
}

/* Stats values */
.stat .value.positive {
    color: #00ff88;
}

.stat .value.negative {
    color: #ff6b6b;
}

/* Error Message */
.error-message {
    padding: 30px;
    text-align: center;
    color: #ff6b6b;
}

.error-message h3 {
    margin: 0 0 10px;
}

/* Placeholder */
.placeholder-icon {
    font-size: 4rem;
    color: #ff9f43;
    margin-bottom: 20px;
    font-family: serif;
}

/* Override accent color for Dang Van */
.dangvan-form .section-header:hover {
    background: rgba(255, 159, 67, 0.1);
}

.dangvan-form .section-header .toggle {
    color: #ff9f43;
}

.dangvan-form .btn-submit {
    background: linear-gradient(135deg, #ff9f43, #ff6b6b);
}

.dangvan-form .btn-submit:hover:not(:disabled) {
    box-shadow: 0 4px 15px rgba(255, 159, 67, 0.4);
}

.dangvan-form input[type="range"]::-webkit-slider-thumb {
    background: #ff9f43;
}

.dangvan-form input[type="text"]:focus,
.dangvan-form input[type="number"]:focus,
.dangvan-form select:focus {
    border-color: #ff9f43;
}