:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Navigation Styles */
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.min-vh-75 {
    min-height: 75vh;
}

/* Profile Image Styles */
.profile-image {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 5px solid #fff;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.profile-placeholder {
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.3);
    transition: transform 0.3s ease;
    background: linear-gradient(135deg, #007bff, #0056b3);
}

.profile-placeholder:hover {
    transform: scale(1.05);
}

/* Fallback profile image styling */
.profile-image-wrapper {
    position: relative;
}

.profile-image-wrapper img:not([src]),
.profile-image-wrapper img[src=""],
.profile-image-wrapper img[src*="profile-photo.jpg"]:not([src*="data:"]) {
    display: none;
}

.profile-image-wrapper img:not([src]) + .profile-placeholder,
.profile-image-wrapper img[src=""] + .profile-placeholder,
.profile-image-wrapper img[src*="profile-photo.jpg"]:not([src*="data:"]) + .profile-placeholder {
    display: flex !important;
}

/* Social Links */
.social-links a {
    transition: all 0.3s ease;
    border-radius: 25px;
}

.social-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.profile-placeholder:hover {
    transform: translateY(-5px);
}

/* Card Styles */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    border-radius: 10px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card-img-top {
    border-radius: 10px 10px 0 0;
}

/* Skill Cards */
.skill-card {
    background: #fff;
    transition: all 0.3s ease;
}

.skill-card:hover {
    background: var(--light-color);
    transform: translateY(-2px);
}

.progress {
    height: 8px;
    border-radius: 10px;
}

.progress-bar {
    border-radius: 10px;
}

/* Button Styles */
.btn {
    border-radius: 25px;
    font-weight: 500;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
}

.btn-lg {
    padding: 0.75rem 2rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Badge Styles */
.badge {
    font-size: 0.75rem;
    padding: 0.5em 0.75em;
    border-radius: 15px;
}

/* Footer Styles */
footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%) !important;
}

footer a {
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--primary-color) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .btn-lg {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* Utility Classes */
.text-shadow {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.box-shadow {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.border-radius-lg {
    border-radius: 15px;
}

/* Content Typography */
.content h1, .content h2, .content h3, .content h4, .content h5, .content h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.content p {
    margin-bottom: 1rem;
    color: #666;
}

.content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
}

.content blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    background: var(--light-color);
    padding: 1rem;
    border-radius: 5px;
}

.content code {
    background: var(--light-color);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}

.content pre {
    background: var(--dark-color);
    color: #fff;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
}