/* PsychLab — Experiment Page Layout */

/* Nav bar */
.experiment-nav {
    display: flex;
    align-items: center;
    padding: 0.6rem 1.5rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    gap: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-home {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}
.nav-home:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.nav-title {
    font-size: 1.05rem;
    font-weight: 600;
    flex: 1;
}

.nav-btn {
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    color: var(--color-text-secondary);
}
.nav-btn:hover {
    background: var(--color-bg);
}

/* Main container: sidebar + experiment area */
.experiment-container {
    display: flex;
    min-height: calc(100vh - 49px);
}

/* Theory sidebar */
.panel-theory {
    width: 340px;
    min-width: 340px;
    padding: var(--space-xl);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    max-height: calc(100vh - 49px);
    position: sticky;
    top: 49px;
}

.panel-theory h2 {
    font-size: 1.15rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.panel-theory h3 {
    font-size: 0.95rem;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.panel-theory p {
    font-family: var(--font-serif);
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.panel-theory ul,
.panel-theory ol {
    font-family: var(--font-serif);
    font-size: 0.88rem;
    line-height: 1.65;
    color: var(--color-text-secondary);
    padding-left: 1.2rem;
    margin-bottom: var(--space-sm);
}

.panel-theory li {
    margin-bottom: 0.3rem;
}

.references {
    font-size: 0.82rem !important;
    line-height: 1.55 !important;
}

.references li {
    margin-bottom: 0.5rem;
}

.references em {
    font-style: italic;
}

/* Experiment main area */
.panel-experiment {
    flex: 1;
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

/* Phase containers */
.phase {
    width: 100%;
    max-width: 800px;
}

/* Instructions phase */
#phase-instructions {
    text-align: center;
}

#phase-instructions h2 {
    margin-bottom: var(--space-lg);
}

.instruction-content {
    text-align: left;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    font-size: 0.95rem;
    line-height: 1.7;
}

.instruction-content p {
    margin-bottom: var(--space-md);
}

.instruction-content .key-hint {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Running phase */
#phase-running {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.progress-container {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--color-border-light);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.2s ease;
    width: 0%;
}

#progress-text {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    min-width: 60px;
    text-align: right;
}

/* Stimulus area */
.stimulus-area {
    width: 100%;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.stimulus-area.dark {
    background: #111;
    border-color: #333;
}

/* Fixation cross */
.fixation-cross {
    font-size: 2.5rem;
    font-weight: 300;
    color: #666;
    user-select: none;
}

/* Feedback */
.feedback {
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.3rem 1rem;
    border-radius: var(--radius-md);
}
.feedback.correct {
    color: var(--color-accent);
    background: var(--color-accent-light);
}
.feedback.incorrect {
    color: var(--color-error);
    background: var(--color-error-light);
}

/* Countdown */
.countdown {
    font-size: 4rem;
    font-weight: 200;
    color: var(--color-text-muted);
}

/* Results phase */
#phase-results h2 {
    margin-bottom: var(--space-lg);
    text-align: center;
}

.results-summary {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    text-align: center;
    min-width: 140px;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-primary);
}

.stat-unit {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 0.2rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.results-charts {
    margin-bottom: var(--space-xl);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    justify-content: center;
}

.results-charts canvas {
    max-width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.results-interpretation {
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    font-size: 0.93rem;
    line-height: 1.7;
}

.results-interpretation h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.results-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 900px) {
    .experiment-container {
        flex-direction: column;
    }

    .panel-theory {
        width: 100%;
        min-width: 100%;
        max-height: none;
        position: relative;
        top: 0;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .panel-theory.collapsed {
        display: none;
    }

    .panel-experiment {
        padding: var(--space-lg);
    }

    .stimulus-area {
        min-height: 300px;
    }
}

@media (max-width: 500px) {
    .panel-experiment {
        padding: var(--space-md);
    }
    .stat-card {
        min-width: 110px;
    }
}