/* Base Styles & Variables */
:root {
    /* Modern Color Palette - Blue gradient theme */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient-light: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Enhanced Status Colors */
    --status-done: #10b981;
    --status-done-light: #a7f3d0;
    --status-partial: #f59e0b;
    --status-partial-light: #fde68a;
    --status-not-done: #ef4444;
    --status-not-done-light: #fca5a5;
    --status-remaining: #64748b;
    --status-completed: #3b82f6;
    --status-completed-light: #93c5fd;
    --status-revised: #8b5cf6;
    --status-revised-light: #c4b5fd;
    
    /* Modern UI Colors */
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #dbeafe;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    
    /* Enhanced Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Enhanced Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    
    /* Enhanced Transitions */
    --transition-fast: all 0.15s ease-in-out;
    --transition: all 0.25s ease-in-out;
    --transition-slow: all 0.35s ease-in-out;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
}

.dark-mode {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-gradient-light: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
    
    --primary-light: #1e3a8a;
    --status-done-light: #065f46;
    --status-partial-light: #92400e;
    --status-not-done-light: #7f1d1d;
    --status-completed-light: #1e3a8a;
    --status-revised-light: #5b21b6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    min-height: 100vh;
}

/* Header Enhancement */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.logo i {
    font-size: 28px;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-controls {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* Navigation Enhancement */
.nav {
    display: flex;
    gap: var(--space-xs);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xs);
    margin: var(--space-lg) 0;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 80px;
    z-index: 90;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

.nav-btn.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.nav-btn.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--bg-gradient);
    border-radius: var(--radius-sm);
}

/* Main Content Enhancement */
.main {
    padding-bottom: var(--space-2xl);
    animation: fadeIn 0.5s ease-out;
}

.tab-content {
    display: none;
    animation: slideUp 0.3s ease-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Common Components Enhancement */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.page-header h2 {
    font-size: 28px;
    font-weight: 700;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* Enhanced Buttons */
.btn {
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--secondary);
}

.btn-secondary:hover {
    background: var(--text-muted);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 13px;
    border-radius: var(--radius-md);
}

.btn-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Enhanced Cards - FIXED BORDER ISSUE */
.card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Dashboard Enhancement */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
}

.dashboard-header h2 {
    font-size: 32px;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.current-date {
    font-size: 14px;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.full-width {
    grid-column: 1 / -1;
}

.stats-card {
    text-align: center;
    padding: var(--space-xl);
    position: relative;
    border: 2px solid var(--border-color);
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

/* FIXED: Progress Circle - No rectangular border issue */
.progress-circle {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto var(--space-lg);
}

.circle-background {
    width: 100%;
    height: 100%;
    border: 12px solid var(--bg-tertiary);
    border-radius: 50%;
    position: absolute;
    top: 0;
    left: 0;
}

.circle-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 12px solid;
    border-radius: 50%;
    border-top-color: var(--primary);
    border-right-color: var(--primary);
    border-bottom-color: transparent;
    border-left-color: transparent;
    transform: rotate(45deg);
    transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.circle-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 32px;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stats-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.stat-item {
    text-align: center;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-value {
    font-size: 28px;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.performance-metric {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.metric-value {
    font-size: 48px;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}

.metric-label {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 600;
}

.week-progress {
    margin-bottom: var(--space-lg);
}

.progress-bar {
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    margin: var(--space-md) 0;
    box-shadow: var(--shadow-inner);
}

.progress-fill {
    height: 100%;
    background: var(--bg-gradient);
    border-radius: var(--radius-2xl);
    transition: width 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.progress-text {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.day-status-summary {
    display: flex;
    justify-content: space-around;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 13px;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    font-weight: 600;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.status-item.done .status-dot { 
    background: var(--status-done); 
    box-shadow: 0 0 10px var(--status-done);
}
.status-item.partial .status-dot { 
    background: var(--status-partial); 
    box-shadow: 0 0 10px var(--status-partial);
}
.status-item.not-done .status-dot { 
    background: var(--status-not-done); 
    box-shadow: 0 0 10px var(--status-not-done);
}

/* Admin Info Card Styles */
.admin-info-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    box-shadow: var(--shadow-lg);
    margin-top: 30px;
    color: white;
    position: relative;
    overflow: hidden;
}

.admin-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f093fb, #f5576c, #f093fb);
    z-index: 1;
}

.admin-info-card .card-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 0;
    padding-bottom: var(--space-md);
}

.admin-info-card .card-header h3 {
    color: white;
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
}

.admin-details {
    padding: var(--space-lg);
}

.admin-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    padding: var(--space-sm);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.admin-info-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(4px);
}

.admin-info-item:last-child {
    margin-bottom: 0;
}

.admin-info-item i {
    font-size: 18px;
    width: 32px;
    text-align: center;
}

.admin-info-item a {
    color: white;
    text-decoration: underline;
    transition: var(--transition);
    font-weight: 400;
}

.admin-info-item a:hover {
    opacity: 0.8;
    text-decoration: none;
}

/* Subjects Enhancement */
.subjects-overview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-lg);
}

.subject-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.subject-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.subject-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.subject-stats {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.subject-progress {
    height: 6px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    margin-top: var(--space-md);
    overflow: hidden;
    box-shadow: var(--shadow-inner);
}

.subject-progress-fill {
    height: 100%;
    background: var(--bg-gradient);
    transition: width 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-radius: var(--radius-xl);
}

.subjects-container {
    display: grid;
    gap: var(--space-lg);
}

.subject-detail-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
}

.subject-detail-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.chapters-list {
    display: grid;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.chapter-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.chapter-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.chapter-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.chapter-status {
    display: flex;
    gap: var(--space-sm);
}

.status-btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 12px;
    font-weight: 600;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
}

.status-btn:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.status-btn.active {
    color: white;
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

.status-btn.completed.active {
    background: var(--status-completed);
    border-color: var(--status-completed);
}

.status-btn.remaining.active {
    background: var(--status-remaining);
    border-color: var(--status-remaining);
}

.status-btn.revised.active {
    background: var(--status-revised);
    border-color: var(--status-revised);
}

/* Chapter Input Row */
.chapter-input-row {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    align-items: center;
}

.chapter-input-row input {
    flex: 1;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.chapter-input-row input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.chapter-input-row .btn-icon {
    width: 48px;
    height: 48px;
}

/* Analysis Enhancement - FIXED for Mobile Symmetry */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-lg);
    align-items: stretch;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    min-height: 280px;
}

/* Mock Tests Enhancement */
.tests-container {
    display: grid;
    gap: var(--space-lg);
}

.test-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition);
    position: relative;
}

.test-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.test-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
}

.test-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.test-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.test-date {
    font-size: 13px;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-weight: 600;
}

.test-scores {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.score-item {
    text-align: center;
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.score-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.score-subject {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.score-value {
    font-size: 32px;
    font-weight: 800;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.test-total {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-weight: 700;
}

.delete-test {
    background: none;
    border: none;
    color: var(--danger);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-sm) var(--space-md);
    background: var(--danger-light);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: var(--transition);
}

.delete-test:hover {
    background: var(--danger);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* Weekly Planner Enhancement */
.week-progress-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    position: relative;
}

.week-progress-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.week-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.week-stat {
    text-align: center;
    padding: var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.week-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.day-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: var(--transition);
    position: relative;
}

.day-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.day-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--bg-gradient);
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
}

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.day-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.day-date {
    font-size: 13px;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-weight: 600;
}

.day-status {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.day-status-btn {
    padding: var(--space-md);
    font-size: 13px;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-weight: 600;
}

.day-status-btn:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.day-status-btn.active {
    color: white;
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

.day-status-btn.done.active {
    background: var(--status-done);
    border-color: var(--status-done);
}

.day-status-btn.partial.active {
    background: var(--status-partial);
    border-color: var(--status-partial);
}

.day-status-btn.not-done.active {
    background: var(--status-not-done);
    border-color: var(--status-not-done);
}

.day-content textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    resize: vertical;
    transition: var(--transition);
    font-weight: 500;
}

.day-content textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Modal Enhancement */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-lg);
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease-out;
    border: 2px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.modal-body {
    padding: var(--space-xl);
}

.modal-footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
}

/* Forms Enhancement */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    transition: var(--transition);
    font-weight: 500;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.week-selector input {
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    min-width: 180px;
}

/* Import Modal Styles */
.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.import-stat {
    text-align: center;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.import-stat div:first-child {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Mobile Menu (Hidden by default) */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-primary);
    cursor: pointer;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: 95;
    padding: var(--space-md);
    animation: slideDown 0.3s ease-out;
}

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

/* Responsive Design - FIXED Analysis section for mobile */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .analysis-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
    
    .week-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .stats-details {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .chart-container {
        height: 280px;
        min-height: 260px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .header {
        padding: var(--space-md) 0;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .logo i {
        font-size: 24px;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-nav.active {
        display: block;
    }
    
    .mobile-nav .nav-btn {
        width: 100%;
        margin-bottom: var(--space-xs);
        padding: var(--space-lg);
        font-size: 16px;
    }
    
    .mobile-nav .nav-btn span {
        display: inline;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
        padding: var(--space-md);
    }
    
    .dashboard-header h2 {
        font-size: 24px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
        padding: var(--space-md);
    }
    
    .page-header h2 {
        font-size: 24px;
    }
    
    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .header-actions .btn {
        flex: 1;
        min-width: 120px;
    }
    
    .header-actions .week-selector input {
        min-width: 100%;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    /* FIXED: Analysis section symmetry for mobile */
    .analysis-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .analysis-grid .card {
        display: flex;
        flex-direction: column;
        height: auto;
        min-height: 380px;
    }
    
    .analysis-grid .card-header {
        flex-shrink: 0;
        margin-bottom: var(--space-md);
        padding: var(--space-md);
    }
    
    .chart-container {
        height: 250px;
        min-height: 240px;
        padding: var(--space-md);
        flex-grow: 1;
    }
    
    /* Ensure all chart containers have same height */
    #analysis .chart-container canvas {
        height: 220px !important;
        max-height: 220px;
    }
    
    .week-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-details {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-sm);
    }
    
    .stat-value {
        font-size: 24px;
    }
    
    .progress-circle {
        width: 140px;
        height: 140px;
    }
    
    .circle-text {
        font-size: 28px;
    }
    
    .card {
        padding: var(--space-lg);
    }
    
    .admin-info-card {
        margin-top: var(--space-lg);
    }
    
    .admin-info-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .admin-info-item i {
        width: auto;
    }
    
    .chapter-status {
        flex-direction: column;
        width: 100%;
    }
    
    .status-btn {
        width: 100%;
        margin-bottom: var(--space-sm);
    }
    
    .chapter-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .chapter-status {
        width: 100%;
    }
    
    .day-status {
        grid-template-columns: 1fr;
    }
    
    .test-scores {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .subjects-overview {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--space-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        max-width: 95%;
        margin: var(--space-sm);
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: 13px;
    }
    
    .btn-sm {
        padding: var(--space-sm) var(--space-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-xs);
    }
    
    .logo h1 {
        font-size: 18px;
    }
    
    .dashboard-header h2 {
        font-size: 20px;
    }
    
    .page-header h2 {
        font-size: 20px;
    }
    
    .stat-value {
        font-size: 20px;
    }
    
    .metric-value {
        font-size: 36px;
    }
    
    .progress-circle {
        width: 120px;
        height: 120px;
    }
    
    .circle-text {
        font-size: 24px;
    }
    
    .stats-details {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-xs);
    }
    
    .stat-item {
        padding: var(--space-sm);
    }
    
    .stat-label {
        font-size: 11px;
    }
    
    .stat-value {
        font-size: 18px;
    }
    
    /* FIXED: Analysis section for very small screens */
    .analysis-grid .card {
        min-height: 340px;
        padding: var(--space-lg);
    }
    
    .chart-container {
        height: 220px;
        min-height: 210px;
        padding: var(--space-sm);
    }
    
    #analysis .chart-container canvas {
        height: 200px !important;
        max-height: 200px;
    }
    
    #analysis .page-header h2 {
        text-align: center;
    }
    
    #analysis .header-actions {
        justify-content: center;
    }
    
    .test-scores {
        grid-template-columns: 1fr;
    }
    
    .score-value {
        font-size: 28px;
    }
    
    .subjects-overview {
        grid-template-columns: 1fr;
    }
    
    .day-status-summary {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .status-item {
        width: 100%;
        justify-content: center;
    }
    
    .admin-info-item {
        padding: var(--space-sm);
        font-size: 14px;
    }
    
    .admin-info-item a {
        word-break: break-all;
        font-size: 13px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-xl);
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    z-index: 1000;
    max-width: 300px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--status-done);
}

.toast.error {
    border-left: 4px solid var(--status-not-done);
}

.toast.info {
    border-left: 4px solid var(--primary);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}

.empty-state i {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* Analysis section empty state fix */
.analysis-grid .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 220px;
    padding: var(--space-xl);
}

.analysis-grid .empty-state i {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.analysis-grid .empty-state h3 {
    font-size: 16px;
    margin-bottom: var(--space-sm);
}

.analysis-grid .empty-state p {
    font-size: 14px;
    margin-bottom: var(--space-md);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-lg);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Print Styles */
@media print {
    .header-controls,
    .nav,
    .btn,
    .theme-toggle,
    .mobile-menu-btn,
    .modal,
    .modal-backdrop {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    body {
        background: white;
        color: black;
    }
}