/* English Skills Builder - Frontend Styles */
/* Modern, Vibrant Design with Smooth Animations */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Color Palette - Warm & Motivating */
    --esb-primary: #6366f1;
    --esb-primary-dark: #4f46e5;
    --esb-primary-light: #818cf8;
    --esb-secondary: #f97316;
    --esb-secondary-dark: #ea580c;
    --esb-accent: #14b8a6;
    --esb-accent-light: #5eead4;
    
    /* Backgrounds */
    --esb-bg-main: #0f172a;
    --esb-bg-card: #1e293b;
    --esb-bg-card-hover: #334155;
    --esb-bg-input: #0f172a;
    
    /* Text Colors */
    --esb-text: #f1f5f9;
    --esb-text-muted: #94a3b8;
    --esb-text-bright: #ffffff;
    
    /* Status Colors */
    --esb-success: #22c55e;
    --esb-warning: #eab308;
    --esb-error: #ef4444;
    --esb-info: #3b82f6;
    
    /* Gradients */
    --esb-gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --esb-gradient-warm: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    --esb-gradient-cool: linear-gradient(135deg, #14b8a6 0%, #22d3ee 100%);
    --esb-gradient-bg: linear-gradient(180deg, #0f172a 0%, #1e1b4b 100%);
    
    /* Shadows */
    --esb-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --esb-shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --esb-shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --esb-shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    
    /* Spacing */
    --esb-radius-sm: 8px;
    --esb-radius-md: 12px;
    --esb-radius-lg: 20px;
    --esb-radius-xl: 28px;
}

/* Base Styles */
.esb-wrapper {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--esb-gradient-bg);
    min-height: 100vh;
    color: var(--esb-text);
    padding: 2rem;
    box-sizing: border-box;
}

.esb-wrapper * {
    box-sizing: border-box;
}

/* Login Required */
.esb-login-required {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    max-width: 500px;
    margin: 4rem auto;
}

.esb-login-required h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--esb-text);
}

/* Buttons */
.esb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--esb-radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
}

.esb-btn-primary {
    background: var(--esb-gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.esb-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.5);
}

.esb-btn-secondary {
    background: var(--esb-bg-card);
    color: var(--esb-text);
    border: 2px solid var(--esb-primary);
}

.esb-btn-secondary:hover {
    background: var(--esb-primary);
    color: white;
}

.esb-btn-success {
    background: var(--esb-gradient-cool);
    color: white;
}

.esb-btn-warning {
    background: var(--esb-gradient-warm);
    color: white;
}

.esb-btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
}

.esb-btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.esb-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Dashboard Layout */
.esb-dashboard {
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
.esb-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.esb-header-left h1 {
    font-size: 2rem;
    font-weight: 800;
    background: var(--esb-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.25rem 0;
}

.esb-header-left p {
    color: var(--esb-text-muted);
    margin: 0;
    font-size: 1rem;
}

.esb-header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.esb-streak-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--esb-gradient-warm);
    border-radius: var(--esb-radius-xl);
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.4);
}

.esb-streak-badge svg {
    width: 24px;
    height: 24px;
}

/* Stats Grid */
.esb-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.esb-stat-card {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.esb-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--esb-shadow-md);
}

.esb-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--esb-gradient-primary);
}

.esb-stat-card.accent-warm::before {
    background: var(--esb-gradient-warm);
}

.esb-stat-card.accent-cool::before {
    background: var(--esb-gradient-cool);
}

.esb-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--esb-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: rgba(99, 102, 241, 0.15);
    color: var(--esb-primary-light);
}

.esb-stat-card.accent-warm .esb-stat-icon {
    background: rgba(249, 115, 22, 0.15);
    color: var(--esb-secondary);
}

.esb-stat-card.accent-cool .esb-stat-icon {
    background: rgba(20, 184, 166, 0.15);
    color: var(--esb-accent);
}

.esb-stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--esb-text-bright);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.esb-stat-label {
    font-size: 0.875rem;
    color: var(--esb-text-muted);
    font-weight: 500;
}

/* Main Content Grid */
.esb-main-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 2rem;
}

@media (max-width: 1200px) {
    .esb-main-grid {
        grid-template-columns: 1fr;
    }
}

/* Section Headers */
.esb-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.esb-section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--esb-text);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.esb-section-title svg {
    color: var(--esb-primary-light);
}

/* Task Cards */
.esb-tasks-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.esb-task-card {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.esb-task-card:hover {
    background: var(--esb-bg-card-hover);
    border-color: var(--esb-primary);
    transform: translateX(4px);
}

.esb-task-card.completed {
    opacity: 0.85;
    border-color: var(--esb-success);
}

.esb-task-card.completed:hover {
    opacity: 1;
    border-color: var(--esb-primary);
    cursor: pointer;
}

.esb-task-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--esb-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.5rem;
}

.esb-task-icon.speaking { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); }
.esb-task-icon.pronunciation { background: linear-gradient(135deg, #f97316 0%, #fb923c 100%); }
.esb-task-icon.reading { background: linear-gradient(135deg, #14b8a6 0%, #22d3ee 100%); }
.esb-task-icon.vocabulary { background: linear-gradient(135deg, #ec4899 0%, #f472b6 100%); }
.esb-task-icon.conversation { background: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%); }
.esb-task-icon.description { background: linear-gradient(135deg, #06b6d4 0%, #22d3ee 100%); }

.esb-task-content {
    flex: 1;
    min-width: 0;
}

.esb-task-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.esb-task-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--esb-text);
    margin: 0;
}

.esb-task-meta {
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

.esb-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--esb-radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.esb-badge-beginner { background: rgba(34, 197, 94, 0.2); color: #4ade80; }
.esb-badge-intermediate { background: rgba(234, 179, 8, 0.2); color: #fbbf24; }
.esb-badge-advanced { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.esb-badge-points { background: rgba(99, 102, 241, 0.2); color: var(--esb-primary-light); }

.esb-task-description {
    color: var(--esb-text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0 0 0.75rem 0;
}

.esb-task-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.esb-task-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--esb-text-muted);
    font-size: 0.85rem;
}

.esb-task-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.esb-task-status.completed {
    color: var(--esb-success);
}

/* Sidebar */
.esb-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Progress Card */
.esb-progress-card {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
}

.esb-progress-header {
    margin-bottom: 1.5rem;
}

.esb-progress-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--esb-text);
    margin: 0 0 0.25rem 0;
}

.esb-progress-subtitle {
    font-size: 0.85rem;
    color: var(--esb-text-muted);
    margin: 0;
}

.esb-skills-chart {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.esb-skill-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.esb-skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.esb-skill-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--esb-text);
}

.esb-skill-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--esb-primary-light);
}

.esb-skill-bar {
    height: 8px;
    background: var(--esb-bg-input);
    border-radius: 4px;
    overflow: hidden;
}

.esb-skill-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.esb-skill-fill.pronunciation { background: var(--esb-gradient-primary); }
.esb-skill-fill.grammar { background: var(--esb-gradient-warm); }
.esb-skill-fill.fluency { background: var(--esb-gradient-cool); }
.esb-skill-fill.vocabulary { background: linear-gradient(135deg, #ec4899 0%, #f472b6 100%); }

/* Level Badge */
.esb-level-card {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
    text-align: center;
}

.esb-level-badge {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--esb-gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--esb-shadow-glow);
}

.esb-level-badge svg {
    width: 40px;
    height: 40px;
    color: white;
}

.esb-level-name {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--esb-text);
    text-transform: capitalize;
    margin-bottom: 0.25rem;
}

.esb-level-progress {
    font-size: 0.85rem;
    color: var(--esb-text-muted);
}

/* Recent Activity */
.esb-activity-card {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
}

.esb-activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.esb-activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--esb-bg-input);
    border-radius: var(--esb-radius-md);
}

.esb-activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--esb-gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.85rem;
}

.esb-activity-info {
    flex: 1;
    min-width: 0;
}

.esb-activity-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--esb-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.esb-activity-score {
    font-size: 0.75rem;
    color: var(--esb-text-muted);
}

/* Task Modal */
.esb-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.esb-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.esb-modal {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-xl);
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
}

.esb-modal-overlay.active .esb-modal {
    transform: scale(1) translateY(0);
}

.esb-modal-header {
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.esb-modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--esb-text);
    margin: 0 0 0.5rem 0;
}

.esb-modal-close {
    background: transparent;
    border: none;
    color: var(--esb-text-muted);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    transition: color 0.2s;
}

.esb-modal-close:hover {
    color: var(--esb-text);
}

.esb-modal-body {
    padding: 1.5rem;
}

/* Recording Interface */
.esb-task-prompt {
    background: var(--esb-bg-input);
    border-radius: var(--esb-radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.esb-task-prompt h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--esb-text-muted);
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.esb-task-prompt p {
    color: var(--esb-text);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

.esb-recorder {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: var(--esb-radius-lg);
    margin-bottom: 1.5rem;
}

.esb-recorder-status {
    font-size: 1rem;
    color: var(--esb-text-muted);
    margin-bottom: 1rem;
}

.esb-recorder-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    font-weight: 700;
    color: var(--esb-text);
    margin-bottom: 1.5rem;
}

.esb-recorder-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.esb-record-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    background: var(--esb-error);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4);
}

.esb-record-btn:hover {
    transform: scale(1.05);
}

.esb-record-btn.recording {
    animation: pulse 1.5s infinite;
}

.esb-record-btn svg {
    width: 32px;
    height: 32px;
    color: white;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    50% { box-shadow: 0 0 0 20px rgba(239, 68, 68, 0); }
}

/* Waveform */
.esb-waveform {
    height: 60px;
    margin: 1rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
}

.esb-waveform-bar {
    width: 4px;
    background: var(--esb-primary);
    border-radius: 2px;
    transition: height 0.1s ease;
}

/* Audio Player */
.esb-audio-player {
    background: var(--esb-bg-input);
    border-radius: var(--esb-radius-md);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.esb-audio-player audio {
    flex: 1;
    height: 40px;
}

/* Transcription */
.esb-transcription {
    margin-bottom: 1.5rem;
}

.esb-transcription label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--esb-text);
    margin-bottom: 0.75rem;
}

.esb-transcript-hint {
    font-weight: 400;
    color: var(--esb-text-muted);
    font-size: 0.85rem;
}

.esb-transcription textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: var(--esb-radius-md);
    background: var(--esb-bg-input);
    color: var(--esb-text);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color 0.2s;
}

.esb-transcription textarea:focus {
    outline: none;
    border-color: var(--esb-primary);
}

.esb-transcript-note {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--esb-radius-sm);
    font-size: 0.85rem;
    color: var(--esb-text-muted);
    border-left: 3px solid var(--esb-primary);
}

/* Transcription status messages */
.esb-transcribing {
    color: var(--esb-primary-light);
    animation: pulse-text 1.5s ease-in-out infinite;
}

.esb-success {
    color: var(--esb-success);
}

.esb-warning {
    color: var(--esb-warning);
}

@keyframes pulse-text {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.esb-recorder-status {
    font-size: 1rem;
    color: var(--esb-text-muted);
    margin-bottom: 1rem;
    min-height: 24px;
}

/* Feedback Section */
.esb-feedback {
    background: var(--esb-bg-input);
    border-radius: var(--esb-radius-lg);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.esb-feedback-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.esb-feedback-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--esb-text);
    margin: 0;
}

.esb-overall-score {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--esb-gradient-primary);
    border-radius: var(--esb-radius-xl);
    font-weight: 700;
    color: white;
}

.esb-scores-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.esb-score-item {
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-md);
    padding: 1rem;
    text-align: center;
}

.esb-score-label {
    font-size: 0.8rem;
    color: var(--esb-text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.esb-score-value {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--esb-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.esb-feedback-section {
    margin-bottom: 1.25rem;
}

.esb-feedback-section h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--esb-text);
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.esb-feedback-section h4 svg {
    width: 18px;
    height: 18px;
}

.esb-feedback-section.strengths h4 { color: var(--esb-success); }
.esb-feedback-section.improvements h4 { color: var(--esb-warning); }

.esb-feedback-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.esb-feedback-list li {
    padding: 0.75rem 1rem;
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-sm);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--esb-text);
    line-height: 1.5;
}

.esb-feedback-overall {
    padding: 1rem;
    background: var(--esb-bg-card);
    border-radius: var(--esb-radius-md);
    border-left: 4px solid var(--esb-primary);
}

.esb-feedback-overall p {
    margin: 0;
    color: var(--esb-text);
    line-height: 1.6;
}

/* Points Earned Animation */
.esb-points-earned {
    text-align: center;
    padding: 1.5rem;
    background: var(--esb-gradient-warm);
    border-radius: var(--esb-radius-lg);
    margin-top: 1.5rem;
}

.esb-points-earned .points-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
}

.esb-points-earned .points-label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
}

/* Loading State */
.esb-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.esb-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--esb-bg-input);
    border-top-color: var(--esb-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.esb-loading p {
    margin-top: 1rem;
    color: var(--esb-text-muted);
}

/* Empty State */
.esb-empty {
    text-align: center;
    padding: 3rem;
    color: var(--esb-text-muted);
}

.esb-empty svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
    .esb-wrapper {
        padding: 1rem;
    }
    
    .esb-header {
        flex-direction: column;
        text-align: center;
    }
    
    .esb-header-left h1 {
        font-size: 1.5rem;
    }
    
    .esb-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .esb-task-card {
        flex-direction: column;
    }
    
    .esb-task-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .esb-modal {
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }
    
    .esb-scores-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.esb-task-card {
    animation: fadeIn 0.3s ease forwards;
}

.esb-task-card:nth-child(2) { animation-delay: 0.05s; }
.esb-task-card:nth-child(3) { animation-delay: 0.1s; }
.esb-task-card:nth-child(4) { animation-delay: 0.15s; }
.esb-task-card:nth-child(5) { animation-delay: 0.2s; }