/* ===== ROOT VARIABLES AND RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Scheme - Serious, Professional Detective Theme */
    --primary-dark: #1a1a2e;
    --secondary-dark: #16213e;
    --accent-blue: #0f3460;
    --accent-gold: #e94560;
    --real-green: #2ecc71;
    --fake-red: #e74c3c;
    --text-light: #ecf0f1;
    --text-muted: #95a5a6;
    --border-color: #34495e;
    --hover-highlight: #2c3e50;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    
    /* Typography */
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-sm: 11px;
    --font-size-md: 13px;
    --font-size-lg: 15px;
    --font-size-xl: 18px;
}

/* ===== BODY AND CONTAINER SETUP ===== */
body {
    font-family: var(--font-main);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
    color: var(--text-light);
    overflow: hidden;
    font-size: var(--font-size-md);
}

/* Main container - adapts to iframe (450px) or standalone (90vh) */
#app-container {
    width: 100%;
    height: 450px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* When opened in new tab (not in iframe), use 90vh */
body:not(.in-iframe) #app-container {
    height: 90vh;
}

/* ===== TOOLTIP SYSTEM ===== */
.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.9);
    color: var(--text-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    font-size: var(--font-size-sm);
    z-index: 1000;
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: opacity 0.2s;
}

.tooltip.hidden {
    opacity: 0;
    visibility: hidden;
}

#header-tooltip {
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    white-space: normal;
    max-width: 80%;
    text-align: center;
}

/* ===== NARRATIVE PANEL ===== */
#narrative-panel {
    background: linear-gradient(90deg, var(--accent-blue) 0%, var(--secondary-dark) 100%);
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--accent-gold);
    box-shadow: 0 2px 6px var(--shadow-color);
}

.narrative-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-gold) 0%, #c0392b 100%);
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    box-shadow: 0 2px 6px var(--shadow-color);
}

/* Detective badge icon */
.avatar::before {
    content: '🕵️';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
}

.dialogue {
    flex: 1;
    font-size: var(--font-size-md);
    line-height: 1.4;
    color: var(--text-light);
}

/* ===== MAIN INVESTIGATION AREA ===== */
#main-area {
    flex: 1;
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    overflow: hidden;
}

/* ===== MEDIA POOL (Left Side) ===== */
#media-pool {
    flex: 1;
    background: var(--secondary-dark);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.pool-header {
    background: var(--accent-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    font-size: var(--font-size-md);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.items-grid {
    flex: 1;
    padding: var(--spacing-sm);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    overflow-y: auto;
    align-content: start;
}

/* Media Item Cards */
.media-item {
    background: var(--primary-dark);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    padding: var(--spacing-sm);
    cursor: grab;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: 70px;
    position: relative;
}

.media-item:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 0 12px rgba(233, 69, 96, 0.4);
    transform: translateY(-2px);
}

.media-item:active {
    cursor: grabbing;
    transform: scale(0.95);
}

.media-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.media-icon {
    font-size: 24px;
}

.media-label {
    font-size: var(--font-size-sm);
    text-align: center;
    line-height: 1.2;
}

/* ===== INVESTIGATION GUIDE (Center) ===== */
#investigation-guide {
    width: 180px;
    background: var(--secondary-dark);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.guide-title {
    background: var(--accent-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    font-size: var(--font-size-md);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.guide-content {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    overflow-y: auto;
}

.step {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--primary-dark);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: help;
    transition: all 0.2s;
}

.step:hover {
    background: var(--hover-highlight);
    border-color: var(--accent-gold);
    box-shadow: 0 0 8px rgba(233, 69, 96, 0.3);
}

.step-number {
    width: 24px;
    height: 24px;
    background: var(--accent-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.step-text {
    font-size: var(--font-size-sm);
    line-height: 1.2;
}

/* ===== SORTING AREA (Right Side) ===== */
#sorting-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.category-zone {
    flex: 1;
    border-radius: 6px;
    border: 2px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.category-zone.drag-over {
    border-style: solid;
    box-shadow: 0 0 16px rgba(233, 69, 96, 0.6);
    transform: scale(1.02);
}

.real-zone {
    background: rgba(46, 204, 113, 0.1);
    border-color: var(--real-green);
}

.real-zone.drag-over {
    background: rgba(46, 204, 113, 0.2);
    box-shadow: 0 0 16px rgba(46, 204, 113, 0.6);
}

.fake-zone {
    background: rgba(231, 76, 60, 0.1);
    border-color: var(--fake-red);
}

.fake-zone.drag-over {
    background: rgba(231, 76, 60, 0.2);
    box-shadow: 0 0 16px rgba(231, 76, 60, 0.6);
}

.zone-header {
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 700;
    font-size: var(--font-size-md);
    text-align: center;
    border-bottom: 2px solid currentColor;
}

.real-zone .zone-header {
    background: var(--real-green);
    color: white;
}

.fake-zone .zone-header {
    background: var(--fake-red);
    color: white;
}

.zone-content {
    flex: 1;
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    overflow-y: auto;
}

.zone-content .media-item {
    cursor: default;
    min-height: 50px;
}

.zone-content .media-item:hover {
    transform: none;
}

/* ===== SCORE PANEL ===== */
#score-panel {
    background: var(--accent-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    border-top: 2px solid var(--accent-gold);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    justify-content: center;
    box-shadow: 0 -2px 6px var(--shadow-color);
}

.score-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.score-label {
    font-size: var(--font-size-md);
    color: var(--text-muted);
}

.score-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--accent-gold);
}

.action-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-gold);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    height: fit-content;
    box-shadow: 0 2px 6px var(--shadow-color);
}

.action-btn:hover {
    background: #c0392b;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.action-btn:active {
    transform: translateY(0);
}

/* ===== MODAL SYSTEM ===== */
.modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: opacity 0.3s;
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-content {
    background: var(--secondary-dark);
    border: 2px solid var(--accent-gold);
    border-radius: 8px;
    padding: var(--spacing-xl);
    max-width: 400px;
    text-align: center;
    box-shadow: 0 4px 16px var(--shadow-color);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Feedback Modal */
.feedback-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.feedback-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.feedback-explanation {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    line-height: 1.4;
}

/* Completion Modal */
.completion-content {
    max-width: 500px;
}

.completion-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.completion-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--accent-gold);
}

.completion-stats {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.completion-message {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.4;
}

/* ===== SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--primary-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-gold);
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 600px) {
    .items-grid {
        grid-template-columns: 1fr;
    }
    
    #investigation-guide {
        width: 140px;
    }
    
    .step-text {
        font-size: 10px;
    }
}

/* ===== ACCESSIBILITY ===== */
.media-item:focus,
.step:focus,
.action-btn:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

/* ===== PANEL BASE CLASS ===== */
.panel {
    position: relative;
}