/* ==========================================================================
   CHARTE GRAPHIQUE & DESIGN SYSTEM ABAKOZ — FORMATION RÉSEAU INTERACTIVE
   ========================================================================== */

:root {
    --color-purple-dark: #3B1E6D;
    --color-purple: #5A2E9D;
    --color-purple-light: #7E49D3;
    --color-purple-subtle: #F3E8FF;
    
    --color-orange: #FF6B35;
    --color-orange-hover: #E8551E;
    --color-orange-subtle: #FFEDD5;
    
    --color-green: #10B981;
    --color-green-subtle: #D1FAE5;
    --color-red: #EF4444;
    --color-red-subtle: #FEE2E2;
    --color-blue: #3B82F6;
    --color-blue-subtle: #DBEAFE;
    
    --bg-light: #F8FAFC;
    --bg-card: #FFFFFF;
    --border-color: #E2E8F0;
    
    --slate-900: #0F172A;
    --slate-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    
    --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 20px 35px -5px rgba(90, 46, 157, 0.15);
}

/* Shared platform navigation. Presentation and presenter views intentionally hide it. */
.abakoz-platform-nav { background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border-color, #E2E8F0); position: relative; z-index: 20; }
.abakoz-platform-nav-inner { max-width: 1180px; margin: 0 auto; min-height: 62px; padding: 10px 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.abakoz-platform-brand, .abakoz-platform-links { display: flex; align-items: center; gap: 14px; }
.abakoz-platform-brand { color: var(--slate-900, #0F172A); font-weight: 700; text-decoration: none; }
.abakoz-nav-logo { display: block; width: 76px; height: auto; flex-shrink: 0; }
.abakoz-login-logo { display: block; width: 200px; max-width: 70%; height: auto; margin: 0 auto 24px; }
.abakoz-course-icon { width: 26px; height: 26px; object-fit: contain; vertical-align: middle; margin-right: 6px; }
.abakoz-platform-links a { color: var(--slate-700, #334155); text-decoration: none; font-size: .92rem; }
.abakoz-platform-links a:hover { color: var(--color-purple, #5A2E9D); }
.abakoz-platform-links form { margin: 0; }
.abakoz-platform-links button { background: transparent; border: 0; color: var(--slate-700, #334155); padding: 0; font-size: .92rem; }
.abakoz-platform-user { color: var(--slate-600, #475569); font-size: .88rem; border-left: 1px solid var(--border-color, #E2E8F0); padding-left: 14px; }
.abakoz-platform-cta { background: var(--color-purple, #5A2E9D); color: #fff !important; border-radius: 8px; padding: 8px 12px; }
@media (max-width: 760px) { .abakoz-platform-nav-inner { align-items: flex-start; flex-direction: column; } .abakoz-platform-links { flex-wrap: wrap; gap: 10px; } .abakoz-platform-user { border-left: 0; padding-left: 0; } }

body {
    font-family: var(--font-main);
    color: var(--slate-800);
    background-color: var(--bg-light);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   DASHBOARD / LANDING PAGE
   ========================================================================== */
.dashboard-bg {
    background: radial-gradient(circle at 10% 20%, rgba(90, 46, 157, 0.04) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 107, 53, 0.04) 0%, transparent 40%),
                #F8FAFC;
    min-height: 100vh;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-purple-dark), var(--color-purple-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge-abakoz {
    display: inline-block;
    background: var(--color-purple-subtle);
    color: var(--color-purple);
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.btn-primary-abakoz {
    background: linear-gradient(135deg, var(--color-purple), var(--color-purple-light));
    color: #FFFFFF !important;
    border: none;
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    border-radius: 10px;
    transition: all 0.25s ease;
}

.btn-primary-abakoz:hover {
    background: linear-gradient(135deg, var(--color-purple-dark), var(--color-purple));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-abakoz {
    border: 2px solid var(--color-purple);
    color: var(--color-purple);
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    border-radius: 10px;
    background: transparent;
    transition: all 0.25s ease;
}

.btn-outline-abakoz:hover {
    background: var(--color-purple-subtle);
    color: var(--color-purple-dark);
    transform: translateY(-2px);
}

.stat-card {
    background: #FFFFFF;
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--slate-900);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--slate-600);
    font-weight: 500;
}

.card-abakoz {
    border-radius: 20px;
    background: #FFFFFF;
}

.slide-nav-card {
    display: block;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    transition: all 0.2s ease;
}

.slide-nav-card:hover {
    border-color: var(--color-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.slide-badge {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* ==========================================================================
   PRESENTATION VIEWPORT & 16:9 STAGE
   ========================================================================== */
.presentation-body {
    background-color: #0B0F19;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
}

#presentation-viewport {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 1.5rem;
    box-sizing: border-box;
}

.slide-stage {
    aspect-ratio: 16 / 9;
    width: 100%;
    max-width: 1560px;
    max-height: 92vh;
    background: #FFFFFF;
    border-radius: 20px;
    box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Slide Header Bar */
.slide-topbar {
    padding: 1.25rem 2rem 0.75rem 2rem;
    border-bottom: 1px solid #F1F5F9;
    background: #FFFFFF;
    flex-shrink: 0;
}

.brand-badge {
    background: var(--color-purple);
    color: #FFFFFF;
    font-weight: 800;
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    letter-spacing: 1px;
}

.category-pill {
    background: #F1F5F9;
    color: var(--slate-700);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
}

.step-pill {
    background: var(--color-orange-subtle);
    color: var(--color-orange);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
}

.slide-counter-badge {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--slate-600);
    background: #F8FAFC;
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
}

/* Progress Bar */
.presentation-progress-track {
    height: 4px;
    background: #F1F5F9;
    width: 100%;
    position: relative;
}

.presentation-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-purple), var(--color-orange));
    width: 2%;
    transition: width 0.3s ease;
}

/* Main Slide Canvas */
.slide-main-canvas {
    flex: 1 1 auto;
    min-height: 0;
    padding: 1.5rem 2.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    position: relative;
    background: #FFFFFF;
}

/* Slide Footer */
.slide-footer {
    padding: 0.75rem 2rem;
    background: #FAFAFA;
    border-top: 1px solid #F1F5F9;
    flex-shrink: 0;
    min-height: 48px;
}

.footer-msg {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-purple);
}

.footer-hint kbd {
    background: #E2E8F0;
    color: var(--slate-800);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.75rem;
    border: 1px solid #CBD5E1;
}

/* ==========================================================================
   PROGRESSIVE DISCLOSURE STEPS
   ========================================================================== */
.step-item {
    --reveal-duration: 520ms;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--reveal-duration) cubic-bezier(0.16, 1, 0.3, 1), transform var(--reveal-duration) cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.step-item.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.step-highlight {
    animation: pulseBorder 1.2s ease infinite alternate;
}

@keyframes pulseBorder {
    0% { box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.4); }
    100% { box-shadow: 0 0 0 8px rgba(255, 107, 53, 0); }
}

/* ==========================================================================
   SLIDE COMPONENTS & LAYOUTS
   ========================================================================== */
.slide-title-header {
    margin-bottom: 1.75rem;
}

.slide-main-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-purple-dark);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.slide-subtitle {
    font-size: 1.2rem;
    color: var(--slate-600);
    font-weight: 400;
    line-height: 1.35;
}

/* Visual Image & Diagram Box */
.slide-visual-card {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-height: 52vh;
}

.slide-visual-img {
    max-width: 100%;
    max-height: 50vh;
    object-fit: contain;
    display: block;
}

/* Key Concept / Message Callout */
.key-message-box {
    background: linear-gradient(135deg, rgba(90, 46, 157, 0.06), rgba(255, 107, 53, 0.08));
    border-left: 5px solid var(--color-orange);
    border-radius: 0 12px 12px 0;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-purple-dark);
    margin-top: 1.25rem;
}

/* Terminal component */
.terminal-window {
    background: #0F172A;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid #334155;
    font-family: var(--font-mono);
}

.terminal-header {
    background: #1E293B;
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.term-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.terminal-body {
    padding: 1.25rem;
    color: #E2E8F0;
    font-size: 0.95rem;
    line-height: 1.6;
    min-height: 180px;
}

.term-prompt {
    color: var(--color-orange);
    font-weight: bold;
}

/* ==========================================================================
   QUIZ SLIDES (41 to 50)
   ========================================================================== */
.quiz-question-box {
    background: var(--color-purple-subtle);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    border-left: 6px solid var(--color-purple);
}

.quiz-question-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-purple-dark);
    margin: 0;
}

.quiz-option-btn {
    background: #FFFFFF;
    border: 2px solid var(--border-color);
    border-radius: 14px;
    padding: 1.1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--slate-800);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.quiz-option-btn:hover {
    border-color: var(--color-purple);
    background: #FAF8FF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.quiz-option-letter {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: #F1F5F9;
    color: var(--slate-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.quiz-option-btn.selected {
    border-color: var(--color-purple);
    background: var(--color-purple-subtle);
}

.quiz-option-btn.selected .quiz-option-letter {
    background: var(--color-purple);
    color: #FFFFFF;
}

.quiz-option-btn.is-correct {
    border-color: var(--color-green) !important;
    background: var(--color-green-subtle) !important;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.quiz-option-btn.is-correct .quiz-option-letter {
    background: var(--color-green) !important;
    color: #FFFFFF !important;
}

.quiz-option-btn.is-wrong {
    border-color: var(--color-red) !important;
    background: var(--color-red-subtle) !important;
}

.quiz-option-btn.is-wrong .quiz-option-letter {
    background: var(--color-red) !important;
    color: #FFFFFF !important;
}

.quiz-feedback-card {
    background: #FFFFFF;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-top: 1.5rem;
}

/* ==========================================================================
   FLOATING HUD CONTROLS
   ========================================================================== */
.hud-controls {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 40px;
    padding: 0.5rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    z-index: 1000;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.hud-controls.is-idle {
    opacity: 0.15;
}

.hud-controls.is-idle:hover {
    opacity: 1;
}

.hud-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: #FFFFFF;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s ease;
}

.hud-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #FFFFFF;
    transform: scale(1.08);
}

.hud-btn-primary {
    background: var(--color-purple) !important;
    color: #FFFFFF !important;
    box-shadow: 0 4px 12px rgba(90, 46, 157, 0.4);
}

.hud-btn-primary:hover {
    background: var(--color-purple-light) !important;
    transform: scale(1.1);
}

/* TOC Offcanvas */
.toc-offcanvas {
    background: #0F172A !important;
    color: #FFFFFF;
    width: 380px !important;
}

.toc-item {
    background: transparent !important;
    color: #CBD5E1 !important;
    border-color: rgba(255, 255, 255, 0.08) !important;
    transition: all 0.2s ease;
}

.toc-item:hover, .toc-item.active {
    background: rgba(255, 255, 255, 0.08) !important;
    color: #FFFFFF !important;
}

.toc-badge {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #FFFFFF;
    flex-shrink: 0;
}

/* ==========================================================================
   PRESENTER CONSOLE
   ========================================================================== */
.presenter-body {
    background-color: #0F172A;
    color: #FFFFFF;
}

.presenter-header {
    background: #1E293B;
    border-bottom: 1px solid #334155;
}

.bg-dark-slate {
    background: #0F172A;
}

.bg-secondary-dark {
    background: #1E293B;
    border-radius: 12px;
}

.bg-purple-dark {
    background: #2E1065;
    border-radius: 12px;
}

.border-purple {
    border: 1px solid #7E49D3 !important;
}

.presenter-screen-wrapper {
    background: #000000;
    padding: 8px;
}

.presenter-scale {
    max-height: 55vh;
    font-size: 0.85rem;
}

.presenter-scale .slide-main-title {
    font-size: 1.5rem;
}

.presenter-scale .slide-visual-card {
    max-height: 32vh;
}

.presenter-scale .slide-visual-img {
    max-height: 30vh;
}

/* Utility classes */
.bg-purple { background-color: var(--color-purple) !important; }
.bg-orange { background-color: var(--color-orange) !important; }
.text-purple { color: var(--color-purple) !important; }
.text-orange { color: var(--color-orange) !important; }
.text-xs { font-size: 0.75rem; }

/* ==========================================================================
   INTERACTIVE DIAGRAMS STYLES
   ========================================================================== */
.interactive-diagram-wrapper {
    width: 100%;
}

.network-rack-box {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
}

.rack-unit {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.rack-unit:hover {
    background: #F1F5F9;
    border-color: var(--color-purple);
}

.device-card {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.device-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: #F8FAFC;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.flow-canvas {
    min-height: 120px;
}

.flow-node .node-avatar {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto;
    box-shadow: var(--shadow-sm);
}

.flow-connector {
    flex-grow: 1;
    position: relative;
    margin: 0 0.75rem;
}

.flow-line {
    height: 3px;
    background: #CBD5E1;
    width: 100%;
    position: relative;
}

.flow-packet {
    position: absolute;
    top: -12px;
    left: 45%;
    color: var(--color-orange);
    font-size: 1.25rem;
    animation: packetMove 2s infinite ease-in-out;
}

@keyframes packetMove {
    0% { transform: translateX(-20px); opacity: 0.3; }
    50% { opacity: 1; }
    100% { transform: translateX(20px); opacity: 0.3; }
}

.badge-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 4px;
}
.dot-green { background: #10B981; box-shadow: 0 0 6px #10B981; }

.packet-slice {
    background: var(--color-purple-subtle);
    border: 2px dashed var(--color-purple);
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    text-align: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-purple-dark);
}

.scope-badge {
    display: inline-block;
    font-weight: 800;
    font-size: 0.85rem;
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
}

.card-network-scope {
    transition: transform 0.2s ease;
}
.card-network-scope:hover {
    transform: translateY(-4px);
}

.view-mode-toggle {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    z-index: 10;
}

/* ==========================================================================
   SCÈNE HYBRIDE HD INTERACTIVE (SLIDE ARTWORK + MASQUES + SVG PACKETS)
   ========================================================================== */
.slide-hd-interactive-stage {
    background: #0B0F19;
    min-height: 250px;
    max-height: 58vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-hd-img {
    max-height: 56vh;
    object-fit: contain;
    border-radius: 12px;
}

.slide-svg-overlay {
    z-index: 2;
    pointer-events: none;
}

.interactive-stage-mask {
    position: absolute;
    background: rgba(15, 23, 42, 0.78);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1.5px dashed rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
    transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1), transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 1;
    pointer-events: auto;
}

/* Quand l'étape est atteinte, le masque se dissipe et révèle la zone */
.interactive-stage-mask.is-visible {
    opacity: 0 !important;
    pointer-events: none !important;
    transform: scale(1.02);
}

.mask-badge-reveal {
    animation: bounceSlow 2s infinite ease-in-out;
}

@keyframes bounceSlow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.btn-outline-purple {
    border: 1px solid var(--color-purple);
    color: var(--color-purple);
    background: transparent;
}
.btn-outline-purple:hover {
    background: var(--color-purple);
    color: #FFFFFF;
}

.osi-btn {
    background: #FFFFFF;
    transition: all 0.2s ease;
}
.osi-btn:hover {
    background: var(--color-purple-subtle);
    border-color: var(--color-purple) !important;
    transform: translateX(4px);
}

/* ==========================================================================
   SVG STEP-ITEM & VECTOR DIAGRAM STYLING
   ========================================================================== */
svg .step-item, g.step-item, path.step-item {
    opacity: 0;
    transform: none !important;
    transition: opacity var(--reveal-duration, 520ms) cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

svg .step-item.is-visible, g.step-item.is-visible, path.step-item.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.network-svg-canvas {
    background: radial-gradient(circle at 50% 50%, #FAF5FF 0%, #FFFFFF 70%);
    border-radius: 16px;
    border: 1px solid #E2E8F0;
    box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.02);
}

/* Slide 04 Concept Cards */
.concept-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 0.9rem 1.1rem;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
}

.concept-card:hover {
    border-color: var(--color-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.concept-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* Slide 05 Type Cards (LAN, MAN, WAN) */
.net-type-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.net-type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.net-type-lan {
    border-top: 5px solid var(--color-purple);
}

.net-type-man {
    border-top: 5px solid #8B5CF6;
}

.net-type-wan {
    border-top: 5px solid var(--color-orange);
}

/* Slide 05 Scale Bar */
.scale-comparison-box {
    background: linear-gradient(135deg, #FAF5FF 0%, #F8FAFC 100%);
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 0.85rem 1.5rem;
}

.scale-track-line {
    height: 3px;
    background: linear-gradient(90deg, var(--color-purple), #8B5CF6 50%, var(--color-orange) 100%);
    border-radius: 2px;
    position: relative;
    width: 100%;
}

.scale-track-line::after {
    content: '';
    position: absolute;
    right: 0;
    top: -4px;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 8px solid var(--color-orange);
}

/* ==========================================================================
   PHASE 1 SLIDES STYLING (01 to 08)
   ========================================================================== */
/* Slide 02 Goals */
.goal-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    height: 100%;
}
.goal-card:hover {
    border-color: var(--color-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.goal-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

/* Slide 03 Roadmap */
.roadmap-container {
    position: relative;
}
.roadmap-step-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 1rem;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    height: 100%;
}
.roadmap-step-card:hover {
    border-color: var(--color-purple);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.roadmap-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-purple);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
}

/* Slide 07 Topologies */
.topo-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 14px;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.topo-card:hover {
    border-color: var(--color-purple);
    box-shadow: var(--shadow-md);
}
.topo-svg-frame {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 10px;
    padding: 0.5rem;
}

/* ==========================================================================
   UNIFIED NATIVE SLIDE CANVAS & INTERACTIVE LAB CONTAINER
   Guarantees 100% aesthetic parity with Slides 04 & 05 across all 50 slides.
   ========================================================================== */
.native-slide-canvas,
.interactive-lab-container,
.slide5-container,
.slide8-container,
.quiz-lab-container {
    background: #FFFFFF;
    border-radius: 1.25rem;
    border: 1px solid #E2E8F0;
    box-shadow: 0 4px 20px -2px rgba(124, 58, 237, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
    padding: 1.25rem 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.native-slide-canvas {
    min-height: calc(100vh - 210px);
    max-height: calc(100vh - 190px);
    overflow-y: auto;
}

/* Custom sleek scrollbar for slides that need slight vertical leeway */
.native-slide-canvas::-webkit-scrollbar,
.interactive-lab-container::-webkit-scrollbar,
.quiz-lab-container::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
.native-slide-canvas::-webkit-scrollbar-thumb,
.interactive-lab-container::-webkit-scrollbar-thumb,
.quiz-lab-container::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}
.native-slide-canvas::-webkit-scrollbar-thumb:hover,
.interactive-lab-container::-webkit-scrollbar-thumb:hover,
.quiz-lab-container::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Quiz Lab Container Styling */
.quiz-lab-container {
    max-width: 1080px;
    margin: 0 auto;
}
.quiz-progress-bar-wrapper {
    background: #F1F5F9;
    border-radius: 8px;
    height: 8px;
    overflow: hidden;
}
.quiz-progress-bar {
    background: linear-gradient(90deg, #7C3AED, #FF6B35);
    height: 100%;
    transition: width 0.4s ease;
}





/* A fixed 16:9 teaching canvas is scaled identically on both screens. */
#slide-stage.slide-stage {
    width: 1600px;
    height: 900px;
    max-width: none;
    max-height: none;
    flex: none;
    position: absolute;
    left: 50%;
    top: 50%;
    transform-origin: center;
}
.presenter-screen-wrapper { position: relative; width: 100%; }
#slide-stage .slide-main-canvas { padding: 16px 32px; overflow: hidden; }
.slide-layout { width: 1534px; flex: none; transform-origin: top center; }
#slide-stage .slide-main-title { font-size: 2rem; }
#slide-stage .slide-title-header { min-height: 58px; }
#slide-stage .native-slide-canvas {
    min-height: 0;
    max-height: none;
    height: auto !important;
    overflow: visible;
    justify-content: flex-start !important;
    gap: 12px;
    padding: 18px !important;
}
#slide-stage .native-embedded-header h3,
#slide-stage .native-embedded-header > p { display: none; }
#slide-stage .interactive-lab-container { padding: 18px !important; }
#slide-stage .slide-visual-card { max-height: 640px; }
#slide-stage .slide-visual-img { max-height: 625px; }
#slide-stage .text-xs { font-size: 0.9rem; }
#slide-stage .concept-card { padding: 12px; }
#slide-stage .quiz-lab-container { max-width: 1380px; }
#slide-stage .quiz-option-btn { padding: 14px 20px; }
#slide-stage .quiz-feedback-card { margin-top: 12px; }
#slide-stage .quiz-lab-container { padding-top: 12px !important; padding-bottom: 12px !important; }
#slide-stage .quiz-situation { font-size: 1rem; line-height: 1.45; }
#slide-stage .slide-footer { min-height: 48px; }
#slide-stage .footer-msg { max-width: 1000px; font-size: 0.9rem; }
#slide-stage .col-md-2 { flex: 0 0 auto; width: 16.666667%; }
#slide-stage .col-md-3 { flex: 0 0 auto; width: 25%; }
#slide-stage .col-md-4 { flex: 0 0 auto; width: 33.333333%; }
#slide-stage .col-md-5, #slide-stage .col-lg-5 { flex: 0 0 auto; width: 41.666667%; }
#slide-stage .col-md-6, #slide-stage .col-lg-6 { flex: 0 0 auto; width: 50%; }
#slide-stage .col-md-7, #slide-stage .col-lg-7 { flex: 0 0 auto; width: 58.333333%; }
#slide-stage .col-md-8 { flex: 0 0 auto; width: 66.666667%; }
.presenter-body .text-white-75, #presenter-notes { color: #E2E8F0; }
#presenter-notes { overflow-y: auto; max-height: 480px; }
#presenter-notes code { color: #FDBA74; }
#next-action-preview { max-height: 5.2rem; overflow: hidden; line-height: 1.4; }
.presenter-body #presenter-notes { line-height: 1.55; }
.hud-controls { bottom: 8px; }
@media (prefers-reduced-motion: reduce) {
    .step-item { transition: none !important; }
}

/* Presenter Structured Notes */
.presenter-notes-stack { gap: 10px; }
.presenter-notes-stack .note-card {
    background: #0F172A !important;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.15s ease;
}
.presenter-notes-stack .note-card:hover {
    transform: translateX(2px);
}
.presenter-notes-stack .note-tag {
    letter-spacing: 0.05em;
}
.text-cyan { color: #38BDF8 !important; }
.text-emerald { color: #34D399 !important; }
.border-cyan { border-color: #38BDF8 !important; }
.border-emerald { border-color: #34D399 !important; }
.border-purple { border-color: #A855F7 !important; }
.bg-purple-dark { background-color: #2E1065 !important; }
.text-white-90 { color: rgba(255, 255, 255, 0.9) !important; }