/* EdumateHub Custom Styles */

/* Ensure notification dropdown is always above all content */
.notification-menu,
.dropdown-menu.notification-menu {
    z-index: 5000 !important; /* higher than modal, navbar, cards, etc. */
    position: absolute !important;
}

/* Global Styles */
html, body {
    height: 100%;
    min-height: 100vh;
}
body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    position: relative;
    background: #667eea;
}
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    background: linear-gradient(rgba(102,126,234,0.7), rgba(118,75,162,0.7)), url('https://images.unsplash.com/photo-1513258496099-48168024aec0?auto=format&fit=crop&w=1500&q=80') no-repeat center center fixed;
    background-size: cover;
    filter: brightness(0.95) saturate(1.1);
}

/* Content Container */
.content-wrapper {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    margin: 20px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Navbar Enhancements */
.navbar {
    background: rgba(26, 35, 126, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1050;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: #ffffff !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.navbar-brand i {
    background: linear-gradient(45deg, #ffd700, #ffed4e);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.75rem 1rem !important;
    border-radius: 8px;
    transition: all 0.3s ease;
    margin: 0 0.25rem;
}

.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff !important;
    transform: translateY(-2px);
}

/* Card Enhancements */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
    font-weight: 600;
    padding: 1.25rem;
}

.card-body {
    padding: 1.5rem;
}

/* Button Enhancements */
.btn {
    border-radius: 10px;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
    box-shadow: 0 4px 15px rgba(86, 171, 47, 0.4);
}

.btn-success:hover {
    background: linear-gradient(135deg, #4e9927 0%, #96d4b7 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(86, 171, 47, 0.6);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
}

.btn-warning:hover {
    background: linear-gradient(135deg, #ee81f9 0%, #f3455a 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(240, 147, 251, 0.6);
    color: white;
}

.btn-outline-secondary {
    border: 2px solid #6c757d;
    color: #6c757d;
    background: transparent;
}

.btn-outline-secondary:hover {
    background: #6c757d;
    color: white;
    transform: translateY(-2px);
}

/* Form Enhancements */
.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background: white;
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.75rem;
}

/* Alert Enhancements */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.alert-info {
    background: rgba(13, 202, 240, 0.1);
    color: #0c63e4;
    border-left: 4px solid #0dcaf0;
}

.alert-success {
    background: rgba(25, 135, 84, 0.1);
    color: #0f5132;
    border-left: 4px solid #198754;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #664d03;
    border-left: 4px solid #ffc107;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: #842029;
    border-left: 4px solid #dc3545;
}

/* Badge Enhancements */
.badge {
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

/* Chat Room Enhancements */
.chat-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.message {
    border-radius: 20px;
    margin-bottom: 1rem;
    max-width: 75%;
    position: relative;
    animation: messageSlide 0.3s ease-out;
}

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

.message.sent {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    margin-left: auto;
}

.message.received {
    background: rgba(248, 249, 250, 0.9);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Notification Enhancements */
.notification-menu {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.notification-item {
    transition: all 0.3s ease;
    border-radius: 10px;
    margin: 0.5rem;
}

.notification-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(5px);
}

/* Breadcrumb Enhancements */
.breadcrumb {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 0.75rem 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.breadcrumb-item a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-item a:hover {
    color: #764ba2;
}

/* Landing Page Enhancements */
.landing-hero {
    padding: 4rem 0;
    text-align: center;
    color: white;
}

.landing-hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #fff 30%, #e0e7ff 70%, #a5b4fc 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 8px 32px rgba(102,126,234,0.25), 0 2px 8px rgba(0,0,0,0.12);
    filter: blur(1.2px);
    animation: blurFadeIn 2s cubic-bezier(0.4,0,0.2,1) forwards, gradientMove 6s linear infinite;
    position: relative;
}

@keyframes blurFadeIn {
    0% { filter: blur(12px) opacity(0); }
    60% { filter: blur(2px) opacity(0.7); }
    100% { filter: blur(1.2px) opacity(1); }
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

.landing-hero .lead {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Dashboard Cards */
.dashboard-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Assignment Status Colors */
.status-pending {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #8B4513;
}

.status-open {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #2F4F4F;
}

.status-progress {
    background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%);
    color: #8B008B;
}

.status-completed {
    background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%);
    color: #000080;
}

/* Loading Animation */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    border-top-color: #667eea;
    animation: spin 1s ease-in-out infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .content-wrapper {
        margin: 10px;
        border-radius: 15px;
    }
    
    .landing-hero h1 {
        font-size: 2.5rem;
    }
    
    .landing-hero .lead {
        font-size: 1.25rem;
    }
    
    .message {
        max-width: 85%;
    }
    
    .dashboard-card {
        padding: 1.5rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

/* File Upload Styling */
.file-upload-area {
    border: 2px dashed #667eea;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    background: rgba(102, 126, 234, 0.05);
    transition: all 0.3s ease;
}

.file-upload-area:hover {
    border-color: #764ba2;
    background: rgba(118, 75, 162, 0.05);
}

/* Rating Stars */
.rating-stars .fa-star {
    font-size: 1.25rem;
    margin: 0 0.25rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.rating-stars .fa-star:hover {
    transform: scale(1.2);
}

/* Expert Profile Cards */
.expert-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 249, 250, 0.95) 100%);
    border-radius: 20px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.expert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}