/* ==========================================================================
   CVCWVUAA Admin Hub - Optimized Stylesheet
   ========================================================================== */

/* Base Styles */
body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #f0f8ff 0%, #e6f2ff 100%);
    margin: 0;
    padding: 20px;
}

/* Back to Dashboard Button */
.back-to-dashboard a:hover {
    background: linear-gradient(135deg, #1e40af, #3b82f6) !important;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2) !important;
    transform: translateY(-2px);
}

/* Login Screen */
#loginScreen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #002855 0%, #1e40af 100%);
    z-index: 10000;
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.login-box h1 {
    color: #002855;
    margin: 0 0 0.5rem;
    font-size: 2rem;
}

.login-box p {
    color: #666;
    margin: 0 0 2rem;
    font-size: 0.9rem;
}

.login-box input[type="password"] {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    margin-bottom: 1rem;
}

.login-box input[type="password"]:focus {
    outline: none;
    border-color: #002855;
}

.login-box button {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #002855, #1e40af);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.login-box button:hover {
    transform: translateY(-2px);
}

.error-message {
    color: #dc3545;
    font-size: 0.9rem;
    margin-top: 1rem;
    display: none;
}

/* Admin Content */
#adminContent {
    display: none;
}

.hub-container {
    max-width: 900px;
    margin: 0 auto;
}

.hub-header {
    background: linear-gradient(135deg, #002855, #1e40af);
    color: white;
    padding: 3rem 2rem;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.hub-header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
}

.hub-header p {
    margin: 1rem 0 0;
    font-size: 1.2rem;
    opacity: 0.9;
}

.main-notice {
    background: #28a745;
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(40,167,69,0.3);
}

/* Tools Grid */
.tools-grid {
    display: grid;
    gap: 1.5rem;
}

.main-tool {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-decoration: none;
    text-align: center;
    font-size: 1.3rem;
    font-weight: bold;
    box-shadow: 0 8px 32px rgba(40,167,69,0.3);
    transition: transform 0.2s ease;
    display: block;
}

.main-tool:hover {
    transform: translateY(-5px);
    text-decoration: none;
    color: white;
}

.secondary-tools {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.secondary-tool {
    background: white;
    border: 2px solid #e9ecef;
    padding: 2rem;
    border-radius: 12px;
    text-decoration: none;
    text-align: center;
    color: #495057;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    display: block;
}

.secondary-tool:hover {
    border-color: #007bff;
    transform: translateY(-3px);
    text-decoration: none;
    color: #007bff;
    box-shadow: 0 8px 25px rgba(0,123,255,0.2);
}

.tool-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
}

.tool-subtitle {
    font-size: 0.9rem;
    opacity: 0.7;
    font-weight: normal;
}

/* Content Management Section */
.content-section {
    margin-top: 3rem;
}

.section-title {
    text-align: center;
    color: #002855;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.content-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border: 1px solid #e9ecef;
}

.content-card h3 {
    color: #002855;
    margin: 0 0 1rem;
    font-size: 1.2rem;
}

.content-card p {
    color: #666;
    margin: 0 0 1rem;
    font-size: 0.9rem;
}

.content-card .tool-links {
    margin-bottom: 1rem;
}

/* Tool Link Buttons */
.btn-primary {
    display: inline-block;
    background: #ffd100;
    color: #002855;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: #e6bc00;
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    background: #e2e8f0;
    color: #475569;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: #cbd5e1;
    transform: translateY(-2px);
}

.btn-president {
    display: inline-block;
    background: linear-gradient(135deg, #002855, #1e40af);
    color: white;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-president:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,40,85,0.3);
}

.btn-success {
    display: inline-block;
    background: #10b981;
    color: white;
    padding: 0.5rem 1rem;
    margin: 0.25rem;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

/* Footer */
.admin-footer {
    text-align: center;
    margin-top: 3rem;
    color: #666;
    font-size: 0.9rem;
}

/* Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

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

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Loading State */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .hub-header {
        padding: 2rem 1rem;
    }
    
    .hub-header h1 {
        font-size: 1.8rem;
    }
    
    .hub-header p {
        font-size: 1rem;
    }
    
    .login-box {
        padding: 2rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .secondary-tools {
        grid-template-columns: 1fr;
    }
}

/* Performance Optimizations */
* {
    box-sizing: border-box;
}

/* Reduce repaints/reflows */
.main-tool,
.secondary-tool,
.btn-primary,
.btn-secondary,
.btn-president,
.btn-success {
    will-change: transform;
}

/* Use transform for animations (GPU accelerated) */
.main-tool:hover,
.secondary-tool:hover,
.btn-primary:hover,
.btn-secondary:hover,
.btn-president:hover,
.btn-success:hover {
    backface-visibility: hidden;
}