:root {
    --primary-bg: #191E3E;
    --secondary-bg: #2A3256;
    --accent-color: #4ECDC4;
    --text-light: #F8F9FA;
    --text-muted: #ADB5BD;
    --error-color: #FF6B6B;
    --success-color: #51CF66;
}

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

body {
    background-color: var(--primary-bg);
    color: var(--text-light);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background-color: var(--secondary-bg) !important;
    border-radius: 0 0 20px 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.navbar-brand {
    font-weight: bold;
    color: var(--accent-color) !important;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.navbar-logo {
    height: 64px;
    width: auto;
    margin-right: 10px;
    border-radius: 6px;
}

.navbar-toggler {
    border-color: var(--accent-color);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2878, 205, 196, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='m4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-nav .nav-link {
    color: var(--text-light) !important;
    margin: 0 10px;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    background-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
}

.navbar-nav .nav-link:focus {
    background-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
}

.dropdown-menu {
    background-color: var(--secondary-bg) !important;
    border: none !important;
    border-radius: 15px;
}

.dropdown-item {
    color: var(--text-light) !important;
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
}

.dropdown-item:focus {
    background-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
}

/* Layout */
.container-main {
    margin-top: 30px;
    margin-bottom: 50px;
}

.card {
    background-color: var(--secondary-bg);
    border: none;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    margin-bottom: 30px;
    overflow: hidden;
}

.card-header {
    background-color: var(--accent-color);
    color: var(--primary-bg);
    font-weight: bold;
    border-radius: 20px 20px 0 0 !important;
    text-align: center;
    padding: 20px;
}

.card-body {
    padding: 30px;
}

/* Counter Display */
.counter-display {
    background: linear-gradient(135deg, var(--accent-color), #45B7B8);
    color: var(--primary-bg);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
}

.counter-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
}

.total-counter, .today-counter {
    text-align: center;
}

.counter-number-large {
    font-size: 2.5rem;
    font-weight: bold;
    line-height: 1;
}

.counter-number-small {
    font-size: 1.8rem;
    font-weight: bold;
    line-height: 1;
}

.counter-label {
    font-size: 0.9rem;
    margin-top: 5px;
    opacity: 0.8;
}

.counter-number {
    font-size: 2.5rem;
    font-weight: bold;
    display: block;
}

.counter-text {
    font-size: 1.1rem;
    margin-top: 5px;
}

/* Statistics specific styles */
.stats-card {
    background-color: var(--secondary-bg);
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.stats-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-color);
}

.stats-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.ranking-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(78, 205, 196, 0.1);
}

.ranking-item:last-child {
    border-bottom: none;
}

.ranking-position {
    background-color: var(--accent-color);
    color: var(--primary-bg);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.ranking-name {
    flex-grow: 1;
    margin-left: 15px;
    color: var(--text-light);
}

.ranking-count {
    color: var(--accent-color);
    font-weight: bold;
}

/* Error Examples */
.error-examples {
    background-color: rgba(255, 107, 107, 0.1);
    border-left: 4px solid var(--error-color);
    padding: 15px;
    border-radius: 15px;
    margin: 15px 0;
}

.correct-examples {
    background-color: rgba(81, 207, 102, 0.1);
    border-left: 4px solid var(--success-color);
    padding: 15px;
    border-radius: 15px;
    margin: 15px 0;
}

.explanation-box {
    background-color: rgba(78, 205, 196, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 15px;
    padding: 20px;
    margin: 20px 0;
}

/* Bootstrap overrides for dark theme */
.btn-primary {
    background-color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
    border-radius: 15px;
    padding: 10px 25px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #45B7B8 !important;
    border-color: #45B7B8 !important;
    color: var(--primary-bg) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.4);
}

.btn-primary:focus {
    background-color: #45B7B8 !important;
    border-color: #45B7B8 !important;
    color: var(--primary-bg) !important;
    box-shadow: 0 0 0 0.25rem rgba(78, 205, 196, 0.25);
}

.btn-primary:active {
    background-color: #45B7B8 !important;
    border-color: #45B7B8 !important;
    color: var(--primary-bg) !important;
}

/* Text colors */
.text-muted {
    color: var(--text-muted) !important;
}

.lead {
    color: var(--text-light) !important;
}

p {
    color: var(--text-light) !important;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-light) !important;
}

li {
    color: var(--text-light) !important;
}

/* Tables - Modern dark theme */
.table {
    color: var(--text-light) !important;
    border-color: rgba(78, 205, 196, 0.2) !important;
}

.table th {
    background-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
    border-color: var(--accent-color) !important;
    font-weight: bold;
    padding: 15px 12px;
    font-size: 0.95rem;
}

.table td {
    background-color: rgba(42, 50, 86, 0.7) !important;
    border-color: rgba(78, 205, 196, 0.15) !important;
    padding: 12px;
    vertical-align: middle;
    color: var(--text-light) !important;
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
    background-color: rgba(42, 50, 86, 0.9) !important;
    color: var(--text-light) !important;
}

.table-striped > tbody > tr:nth-of-type(even) > td {
    background-color: rgba(42, 50, 86, 0.5) !important;
    color: var(--text-light) !important;
}

.table tbody tr:hover td {
    background-color: rgba(78, 205, 196, 0.1) !important;
    color: var(--text-light) !important;
    transition: all 0.3s ease;
}

.table-responsive {
    border: 1px solid rgba(78, 205, 196, 0.2);
    border-radius: 15px;
    overflow: hidden;
    margin: 20px 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.table-sm th,
.table-sm td {
    padding: 10px;
    color: var(--text-light) !important;
}

/* Special table styling for comparison tables */
.table thead th:first-child {
    border-top-left-radius: 15px;
}

.table thead th:last-child {
    border-top-right-radius: 15px;
}

/* Ensure all table text is light */
.table tbody,
.table tbody tr,
.table tbody tr td,
.table tbody tr td strong {
    color: var(--text-light) !important;
}

/* Fix for email example and code blocks */
.correct-examples div[style*="font-family: monospace"],
.error-examples div[style*="font-family: monospace"],
.explanation-box div[style*="font-family: monospace"] {
    color: var(--text-light) !important;
}

/* General monospace/code styling */
div[style*="font-family: monospace"] {
    color: var(--text-light) !important;
    background: rgba(42, 50, 86, 0.3) !important;
}

/* Inline code and monospace elements */
code, 
pre,
.font-monospace,
[style*="font-family: monospace"] {
    color: var(--text-light) !important;
    background-color: rgba(42, 50, 86, 0.5) !important;
}

/* Button styling for tables */
.btn-outline-light {
    color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    background: transparent;
}

.btn-outline-light:hover {
    background-color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
    color: var(--primary-bg) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
}

/* Links */
a {
    color: var(--accent-color);
}

a:hover {
    color: #45B7B8;
}

/* Error Grid for Homepage */
.error-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.error-card {
    background-color: var(--secondary-bg);
    border-radius: 15px;
    padding: 20px;
    text-decoration: none;
    color: var(--text-light);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    display: block;
}

.error-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(78, 205, 196, 0.2);
    border-color: var(--accent-color);
    color: var(--text-light);
    text-decoration: none;
}

/* Hero Section */
.hero-section {
    text-align: center;
    padding: 40px 0;
    background: linear-gradient(135deg, var(--secondary-bg), var(--primary-bg));
    border-radius: 20px;
    margin-bottom: 40px;
}

.hero-icon {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

/* Footer */
.footer {
    background-color: var(--secondary-bg);
    border-radius: 20px 20px 0 0;
    padding: 30px 0;
    margin-top: 50px;
    text-align: center;
}

.footer-logo {
    height: 32px;
    width: auto;
    margin-right: 10px;
    border-radius: 6px;
}

.footer-links {
    margin-top: 10px;
}

.footer-links a {
    color: var(--text-muted) !important;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color) !important;
    text-decoration: none;
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(78, 205, 196, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Examples List */
.examples-list {
    list-style: none;
    padding: 0;
}

.examples-list li {
    margin-bottom: 10px;
    padding: 10px;
    background-color: rgba(78, 205, 196, 0.05);
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container-main {
        margin-top: 20px;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .counter-number, .counter-number-large {
        font-size: 2rem;
    }
    
    .counter-number-small {
        font-size: 1.5rem;
    }
    
    .counter-stats {
        gap: 20px;
    }
    
    .hero-icon {
        font-size: 3rem;
    }
    
    .error-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar-brand {
        font-size: 1.3rem;
    }
    
    .navbar-logo {
        height: 28px;
        margin-right: 8px;
    }
    
    .stats-number {
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .counter-display {
        padding: 15px;
    }
    
    .counter-number, .counter-number-large {
        font-size: 1.8rem;
    }
    
    .counter-number-small {
        font-size: 1.3rem;
    }
    
    .counter-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .hero-section {
        padding: 30px 0;
    }
    
    .stats-number {
        font-size: 1.3rem;
    }
    
    .ranking-item {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .ranking-name {
        margin-left: 10px;
    }
}