:root {
    --primary-color: #0056b3; /* VNPT Blue */
    --secondary-color: #00a8e8; /* Lighter Blue */
    --accent-color: #ff9900; /* Orange accent */
    --text-color: #333;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
    --radius-md: 12px;
    --radius-sm: 8px;
    --font-main: 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    text-align: right;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-role {
    font-size: 0.8rem;
    color: #666;
}

.btn-logout {
    padding: 8px 16px;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-title h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.page-title p {
    color: #666;
}

.actions-area {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.search-box {
    position: relative;
}

.search-input {
    padding: 10px 15px 10px 40px;
    border: 1px solid #ddd;
    border-radius: 25px;
    width: 250px;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
    width: 300px;
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 10px 24px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* Grid Layout */
.cv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.cv-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.cv-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(0, 86, 179, 0.1);
}

.cv-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.cv-card:hover::before {
    opacity: 1;
}

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

.lecturer-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: #222;
}

.lecturer-degree {
    font-size: 0.85rem;
    color: var(--primary-color);
    background: rgba(0, 86, 179, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-top: 5px;
}

.card-body p {
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
    color: #555;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-bio {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #777;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-actions {
    margin-top: 1.5rem;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid #eee;
    padding-top: 1rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.2s;
    color: #666;
}

.btn-icon:hover {
    background: #f0f0f0;
    color: var(--primary-color);
}

.btn-icon.delete:hover {
    color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

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

.modal-container {
    background: white;
    width: 100%;
    max-width: 550px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    overflow: hidden;
}

.modal-overlay.active .modal-container {
    transform: translateY(0);
}

.modal-header {
    padding: 1.5rem;
    background: #f8f9fa;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.modal-footer {
    padding: 1.5rem;
    background: #f8f9fa;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.btn-secondary {
    background: white;
    border: 1px solid #ddd;
    color: #555;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: #f1f1f1;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
}

.toast {
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    border-left: 4px solid var(--primary-color);
    min-width: 300px;
}

.toast.success { border-left-color: #28a745; }
.toast.error { border-left-color: #dc3545; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Loading Skeleton */
.skeleton {
    background: #eee;
    background: linear-gradient(110deg, #ececec 8%, #f5f5f5 18%, #ececec 33%);
    background-size: 200% 100%;
    animation: 1.5s shine linear infinite;
    border-radius: 4px;
}

.skeleton-card {
    height: 200px;
    border-radius: var(--radius-md);
}

@keyframes shine {
    to { background-position-x: -200%; }
}