/**
 * Web Architecture (Network) Course - Styles
 *
 * Extends the shared course template with course-specific customizations.
 * The main styles come from course-template.css
 */

/* =====================================================
   COURSE-SPECIFIC COLOR OVERRIDES
   ===================================================== */
:root {
    /* Blue theme for Network course */
    --course-bg-primary: #0d1117;
    --course-bg-secondary: #161b22;
    --course-bg-card: #161b22;
    --course-bg-code: #0d1117;
    --course-border: #30363d;
    --course-text-primary: #e6edf3;
    --course-text-secondary: #8b949e;
    --course-text-muted: #6e7681;
    --course-accent: #58a6ff;
    --course-accent-secondary: #58a6ff;
    --course-accent-orange: #d29922;
    --course-accent-red: #f85149;
    --course-accent-green: #3fb950;
}

/* =====================================================
   HEADER ADJUSTMENTS
   ===================================================== */
header {
    position: sticky;
    top: 0;
    z-index: 100;
}

/* =====================================================
   SIDEBAR - Use non-collapsible version for this course
   ===================================================== */
aside,
#sidebar-nav {
    width: 280px;
    height: calc(100vh - 60px);
    top: 60px;
}

/* Override collapsible behavior - keep sidebar always expanded */
aside:hover,
#sidebar-nav:hover {
    width: 280px;
}

/* Always show nav items (no collapse) */
aside .nav-topic,
aside .nav-subtopic,
aside .nav-section,
aside .nav-part,
#sidebar-nav .nav-topic,
#sidebar-nav .nav-subtopic,
#sidebar-nav .nav-section,
#sidebar-nav .nav-part {
    opacity: 1;
}

/* Hide the expand indicator */
aside::before,
#sidebar-nav::before {
    display: none;
}

/* =====================================================
   CARD ADJUSTMENTS
   ===================================================== */
.card {
    border-radius: 8px;
}

h2 .icon {
    border-radius: 4px;
    background: transparent;
    color: inherit;
    width: auto;
    height: auto;
    font-size: 1.25rem;
}

/* =====================================================
   REQUEST INSPECTOR WIDGET
   ===================================================== */
.request-input {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.request-input input {
    flex: 1;
    background: var(--course-bg-card);
    border: 1px solid var(--course-border);
    border-radius: 6px;
    padding: 12px 16px;
    color: var(--course-text-primary);
    font-size: 1rem;
}

.request-input input:focus {
    outline: none;
    border-color: var(--course-accent);
}

.request-input button {
    background: var(--course-accent);
    border: none;
    border-radius: 6px;
    padding: 12px 24px;
    color: #fff;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s;
}

.request-input button:hover {
    opacity: 0.9;
}

.request-output {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.request-panel {
    background: var(--course-bg-card);
    border: 1px solid var(--course-border);
    border-radius: 6px;
    overflow: hidden;
}

.request-panel-header {
    background: var(--course-bg-secondary);
    padding: 8px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--course-text-muted);
    border-bottom: 1px solid var(--course-border);
}

.request-panel-body {
    padding: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow-y: auto;
}

/* =====================================================
   DIAGRAM LOADING
   ===================================================== */
.request-lifecycle-diagram {
    min-height: 210px;
}

.diagram-loading-progress {
    min-height: 210px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--course-text-secondary);
}

/* =====================================================
   STEP DETAIL PANEL (for interactive diagram)
   ===================================================== */
.step-detail {
    background: var(--course-bg-primary);
    border: 2px solid var(--course-accent);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 24px;
    animation: slideIn 0.2s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.step-detail-header span {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--course-accent);
}

#step-detail-content {
    color: var(--course-text-secondary);
    line-height: 1.7;
}

#step-detail-content code {
    background: var(--course-bg-card);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    color: var(--course-accent);
}

#step-detail-content pre {
    margin: 12px 0;
}

/* =====================================================
   EXPANDABLE SECTIONS (override for blue theme)
   ===================================================== */
.expand-section {
    background: var(--course-bg-primary);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    margin-bottom: 8px;
}

.expand-section summary {
    padding: 14px 18px;
}

.expand-content {
    padding: 0 18px 18px 18px;
}

/* =====================================================
   SYSTEM DESIGN REFERENCE (merged from standalone course)
   ===================================================== */
.sd-formula-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
    margin: 20px 0 24px;
}

.sd-formula-chip {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.35);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--course-text-secondary);
    font-size: 0.9rem;
}

.sd-formula-chip strong {
    color: var(--course-accent);
}

.sd-table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
}

.sd-table th,
.sd-table td {
    text-align: left;
    border-bottom: 1px solid var(--course-border);
    padding: 9px 10px;
    vertical-align: top;
}

.sd-table th {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--course-text-muted);
    background: rgba(255, 255, 255, 0.02);
}

.sd-table td {
    color: var(--course-text-secondary);
}

.sd-table td:first-child {
    color: var(--course-text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

/* =====================================================
   QUIZ STYLING (blue theme)
   ===================================================== */
.quiz {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--course-border);
    background: transparent;
    border-radius: 0;
    padding: 0;
    padding-top: 24px;
    max-width: none;
}

.quiz-option.selected {
    border-color: var(--course-accent);
    background: rgba(88, 166, 255, 0.1);
}

.quiz-check,
.quiz-submit {
    margin-top: 1rem;
    padding: 0.6rem 1.5rem;
    background: var(--course-accent);
    color: #0d1117;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.15s;
}

.quiz-check:hover,
.quiz-submit:hover {
    filter: brightness(1.08);
}

.quiz-check:disabled,
.quiz-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =====================================================
   SERVICE BOUNDARY GAUGE
   ===================================================== */
.svc-gauge-widget {
    background: var(--course-bg-primary);
    border: 1px solid var(--course-border);
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
}

.svc-gauge-layout {
    display: flex;
    gap: 28px;
    align-items: flex-start;
}

.svc-gauge-questions {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.svc-gauge-question {
    background: var(--course-bg-secondary);
    border: 1px solid var(--course-border);
    border-radius: 8px;
    padding: 12px 14px;
}

.svc-gauge-question.answered {
    border-color: var(--course-accent-green);
    background: rgba(63, 185, 80, 0.08);
}

.svc-gauge-question h4 {
    font-size: 0.86rem;
    margin-bottom: 8px;
    color: var(--course-text-primary);
}

.svc-gauge-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.svc-gauge-option {
    border: 1px solid var(--course-border);
    background: var(--course-bg-primary);
    color: var(--course-text-secondary);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
}

.svc-gauge-option:hover {
    border-color: var(--course-accent);
    color: var(--course-text-primary);
}

.svc-gauge-option.selected {
    border-color: var(--course-accent);
    background: rgba(88, 166, 255, 0.15);
    color: var(--course-text-primary);
}

.svc-score {
    margin-left: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.svc-score-positive {
    color: var(--course-accent-orange);
}

.svc-score-negative {
    color: var(--course-accent-red);
}

.svc-score-neutral {
    color: var(--course-text-muted);
}

.svc-gauge-column {
    width: 210px;
    flex-shrink: 0;
    position: sticky;
    top: 16px;
    text-align: center;
}

.svc-gauge-container {
    width: 200px;
    margin: 0 auto;
}

.svc-gauge-svg {
    width: 100%;
    height: auto;
}

.svc-gauge-needle {
    fill: var(--course-text-primary);
    transform-origin: 100px 95px;
    transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.svc-gauge-needle-center {
    fill: var(--course-bg-primary);
    stroke: var(--course-text-primary);
    stroke-width: 2;
}

.svc-gauge-labels {
    display: flex;
    justify-content: space-between;
    width: 200px;
    margin: 0 auto 12px;
}

.svc-gauge-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--course-text-muted);
}

.svc-verdict-box {
    margin-top: 10px;
    padding: 14px;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: all 0.25s ease;
}

.svc-verdict-box.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.svc-verdict-box.merge {
    background: rgba(88, 166, 255, 0.15);
    border: 1px solid rgba(88, 166, 255, 0.45);
}

.svc-verdict-box.neutral {
    background: rgba(63, 185, 80, 0.15);
    border: 1px solid rgba(63, 185, 80, 0.45);
}

.svc-verdict-box.split {
    background: rgba(210, 153, 34, 0.15);
    border: 1px solid rgba(210, 153, 34, 0.45);
}

.svc-verdict-box h4 {
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.svc-verdict-box p {
    font-size: 0.76rem;
    color: var(--course-text-secondary);
    line-height: 1.4;
}

.svc-reset-btn {
    margin-top: 10px;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--course-border);
    background: var(--course-bg-card);
    color: var(--course-text-primary);
    font-size: 0.75rem;
    cursor: pointer;
}

.svc-reset-btn:hover {
    border-color: var(--course-accent);
}

.svc-pattern-block {
    margin-top: 20px;
}

.svc-pattern-block h4 {
    color: var(--course-accent);
    font-size: 1rem;
    margin-bottom: 6px;
}

.svc-pattern-block p {
    color: var(--course-text-secondary);
    margin-bottom: 10px;
}

/* =====================================================
   RESPONSIVE ADJUSTMENTS
   ===================================================== */
@media (max-width: 900px) {
    aside,
    #sidebar-nav {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
        border-right: none;
        border-bottom: 1px solid var(--course-border);
    }

    .request-output {
        grid-template-columns: 1fr;
    }

    .svc-gauge-layout {
        flex-direction: column-reverse;
    }

    .svc-gauge-column {
        position: static;
        width: 100%;
    }

    .svc-gauge-container,
    .svc-gauge-labels {
        width: 180px;
    }
}