/* ========================
   Custom Color Variables
   ======================== */
:root {
    --primary-color: #1a3a52;
    --secondary-color: #2c5aa0;
    --accent-color: #00a86b;
    --light-bg: #f8f9fa;
    --dark-text: #1a1a1a;
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    
    /* Light Mode */
    --light-bg-primary: #ffffff;
    --light-bg-secondary: #f8f9fa;
    --light-text-primary: #1a1a1a;
    --light-text-secondary: #666666;
    --light-border: #e0e0e0;
    
    /* Dark Mode */
    --dark-bg-primary: #1e1e1e;
    --dark-bg-secondary: #2d2d2d;
    --dark-text-primary: #ffffff;
    --dark-text-secondary: #b0b0b0;
    --dark-border: #404040;
}

/* Dark Mode Styles */
body.dark-mode {
    --light-bg: #2d2d2d;
    --dark-text: #ffffff;
    background-color: var(--dark-bg-primary);
    color: var(--dark-text-primary);
}

body.dark-mode .section-title {
    color: var(--secondary-color);
}

body.dark-mode section:not(.hero-section) {
    background-color: var(--dark-bg-primary) !important;
}

body.dark-mode .bg-light {
    background-color: var(--dark-bg-secondary) !important;
}

body.dark-mode .skill-card,
body.dark-mode .education-card,
body.dark-mode .cert-card {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

body.dark-mode .experience-card {
    background-color: var(--dark-bg-secondary);
}

body.dark-mode .contact-card {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

body.dark-mode p, 
body.dark-mode h5, 
body.dark-mode h6 {
    color: var(--dark-text-primary);
}

body.dark-mode .text-muted {
    color: var(--dark-text-secondary) !important;
}

body.dark-mode .card, 
body.dark-mode .contact-item {
    background-color: var(--dark-bg-secondary);
}

body.dark-mode .navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

body.dark-mode .form-control {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
    color: var(--dark-text-primary);
}

body.dark-mode .form-control::placeholder {
    color: var(--dark-text-secondary);
}

/* ========================
   General Styles
   ======================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark-text);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* ========================
   Navigation Bar
   ======================== */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 1rem 0;
}

.theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 1rem;
}

.theme-toggle:hover {
    transform: scale(1.2) rotate(20deg);
}

.navbar-nav {
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
    transition: var(--transition);
}

.navbar-brand:hover {
    color: var(--accent-color) !important;
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    margin: 0 0.5rem;
    position: relative;
    transition: var(--transition);
    font-weight: 500;
}

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

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after {
    width: 100%;
}

/* ========================
   Hero Section
   ======================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, #245393 100%);
    color: white;
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: slideInDown 0.8s ease;
    position: relative;
    z-index: 1;
}

.hero-section h2 {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 2rem;
    animation: slideInUp 0.8s ease 0.2s backwards;
    position: relative;
    z-index: 1;
}

.professional-summary {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
    animation: slideInDown 0.8s ease 0.1s backwards;
    position: relative;
    z-index: 1;
    letter-spacing: 0.5px;
}

.hero-section p {
    animation: slideInUp 0.8s ease 0.4s backwards;
    position: relative;
    z-index: 1;
}

.social-links {
    animation: slideInUp 0.8s ease 0.6s backwards;
    position: relative;
    z-index: 1;
}

/* ========================
   Animated Background Elements
   ======================== */
.animated-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.floating-shape {
    position: absolute;
    opacity: 0.15;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.shape-1 {
    width: 100px;
    height: 100px;
    border-radius: 20% 80% 80% 20%;
    top: 10%;
    left: 10%;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 80px;
    height: 80px;
    border-radius: 60%;
    top: 20%;
    right: 15%;
    animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 120px;
    height: 120px;
    border-radius: 30% 70% 70% 30%;
    bottom: 15%;
    left: 5%;
    animation: float 12s ease-in-out infinite;
}

.shape-4 {
    width: 90px;
    height: 90px;
    border-radius: 40% 60% 60% 40%;
    top: 50%;
    right: 5%;
    animation: float 9s ease-in-out infinite reverse;
}

.shape-5 {
    width: 110px;
    height: 110px;
    border-radius: 50% 50% 40% 60%;
    bottom: 20%;
    right: 20%;
    animation: float 11s ease-in-out infinite;
}

.network-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0.2;
}

.network-lines .line {
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 2;
    animation: lineAnimation 4s ease-in-out infinite;
}

.network-lines .node {
    fill: rgba(255, 255, 255, 0.4);
    animation: nodeAnimation 3s ease-in-out infinite;
}

@keyframes lineAnimation {
    0%, 100% {
        stroke-dasharray: 100;
        stroke-dashoffset: 100;
        opacity: 0.1;
    }
    50% {
        opacity: 0.3;
    }
}

@keyframes nodeAnimation {
    0%, 100% {
        r: 5;
        opacity: 0.3;
    }
    50% {
        r: 8;
        opacity: 0.6;
    }
}

.social-links .btn {
    transition: var(--transition);
    margin: 0.5rem;
}

.social-links .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* ========================
   Download CV Button
   ======================== */
.download-cv-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #00b876 100%);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(0, 168, 107, 0.3);
    position: relative;
    overflow: hidden;
}

.download-cv-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.download-cv-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0, 168, 107, 0.4);
}

.download-cv-btn:hover::before {
    left: 100%;
}

.download-cv-btn i {
    font-size: 1.2rem;
    transition: var(--transition);
}

.download-cv-btn:hover i {
    transform: translateY(2px);
}

.download-cv-btn span {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: slideInDown 0.8s ease;
    position: relative;
    z-index: 1;
}

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

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(20px, 20px);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ========================
   Section Titles
   ======================== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    position: relative;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.section-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* ========================
   About Section
   ======================== */
#about {
    background: var(--light-bg);
}

#about p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
    animation: fadeIn 0.8s ease;
}

/* ========================
   Skills Section
   ======================== */
#skills {
    background: white;
}

.skill-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

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

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.skill-category {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.skill-list {
    list-style: none;
    padding: 0;
}

.skill-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    transition: var(--transition);
}

.skill-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.skill-list li:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

/* ========================
   Experience Section
   ======================== */
#experience {
    background: var(--light-bg);
}

.experience-item {
    animation: fadeIn 0.8s ease;
}

.experience-card {
    background: white;
    border-left: 5px solid var(--accent-color);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
}

.experience-card:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    transform: translateX(5px);
}

.experience-card h4 {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.3rem;
}

.experience-card h6 {
    font-size: 1rem;
}

.experience-details {
    list-style: none;
    padding-left: 0;
    margin-top: 1.5rem;
}

.experience-details li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #666;
    line-height: 1.8;
}

.experience-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.badge {
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
    font-weight: 600;
    border-radius: 20px;
}

/* ========================
   Education Section
   ======================== */
#education {
    background: white;
}

.education-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    position: relative;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #0d47a1, #ff6f00);
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.education-card h5 {
    color: var(--primary-color);
    font-weight: 700;
}

.education-card p {
    margin: 0;
    color: #666;
}

/* ========================
   Certifications Section
   ======================== */
#certifications {
    background: var(--light-bg);
}

.cert-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.cert-link:hover .cert-card {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-10px);
    border-top-color: var(--accent-color);
}

.cert-card {
    background: white;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    text-align: center;
    border-top: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(13, 71, 161, 0.1), transparent);
    border-radius: 50%;
}

.cert-icon {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cert-card h5 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

/* ========================
   Contact Section
   ======================== */
#contact {
    background: white;
}

.hire-me-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.hire-me-title .hire {
    color: var(--primary-color);
}

.hire-me-title .me {
    color: var(--accent-color);
}

body.dark-mode .hire-me-title .hire {
    color: var(--secondary-color);
}

body.dark-mode .hire-me-title .me {
    color: var(--accent-color);
}

/* Contact Info Section */
.contact-info-section {
    padding: 0 2rem;
}

.contact-heading {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

body.dark-mode .contact-heading {
    color: var(--secondary-color);
}

.contact-subtitle {
    color: #666;
    line-height: 1.8;
    font-size: 1rem;
}

body.dark-mode .contact-subtitle {
    color: var(--dark-text-secondary);
}

/* Contact Info Cards */
.contact-info-card {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
    transition: var(--transition);
    cursor: pointer;
}

body.dark-mode .contact-info-card {
    background: var(--dark-bg-secondary);
    border-left-color: var(--accent-color);
}

.contact-info-card:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background: #f0f0f0;
}

body.dark-mode .contact-info-card:hover {
    background: #383838;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.card-content h5 {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

body.dark-mode .card-content h5 {
    color: var(--secondary-color);
}

.card-content p {
    color: #666;
    margin: 0;
    font-size: 0.95rem;
}

body.dark-mode .card-content p {
    color: var(--dark-text-secondary);
}

.card-content a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.card-content a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background: #f8f9fa;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

body.dark-mode .contact-form {
    background: var(--dark-bg-secondary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.form-group {
    position: relative;
}

.form-input {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 2px solid #e0e0e0;
    padding: 12px 0;
    font-size: 1rem;
    color: var(--dark-text);
    outline: none;
    transition: var(--transition);
}

body.dark-mode .form-input {
    color: var(--dark-text-primary);
    border-bottom-color: var(--dark-border);
}

.form-input::placeholder {
    color: #999;
}

body.dark-mode .form-input::placeholder {
    color: var(--dark-text-secondary);
}

.form-input:focus {
    border-bottom-color: var(--accent-color);
    padding-bottom: 10px;
}

.form-input:focus + .form-line {
    transform: scaleX(1);
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
}

body.dark-mode .form-textarea {
    border-color: var(--dark-border);
}

.form-textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 168, 107, 0.1);
}

.form-submit-wrapper {
    text-align: right;
    margin-top: 2rem;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 40px;
    background: linear-gradient(135deg, var(--accent-color), #00b876);
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(0, 168, 107, 0.3);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 168, 107, 0.4);
}

.submit-btn:active {
    transform: translateY(-1px);
}

.submit-btn i {
    transition: var(--transition);
}

.submit-btn:hover i {
    transform: translateX(3px);
}

/* Social Links Contact Section */
.social-links-contact {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-icon-contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.social-icon-contact:hover {
    transform: translateY(-5px) scale(1.1);
    background: linear-gradient(135deg, var(--accent-color), #00b876);
    box-shadow: 0 8px 25px rgba(0, 168, 107, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hire-me-title {
        font-size: 2.5rem;
    }

    .contact-info-section {
        padding: 0;
        margin-bottom: 3rem;
    }

    .contact-heading {
        font-size: 1.5rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .form-submit-wrapper {
        text-align: center;
    }

    .form-input {
        font-size: 1rem;
    }
}

/* ========================
   Social Links
   ======================== */
.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    margin: 0 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.social-icon:hover {
    transform: translateY(-5px) scale(1.1);
    background: linear-gradient(135deg, var(--accent-color), #ff8f00);
    box-shadow: 0 8px 25px rgba(255, 111, 0, 0.3);
}

/* ========================
   Footer
   ======================== */
footer {
    background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

footer p {
    margin-bottom: 0;
}

footer .text-muted {
    color: rgba(255, 255, 255, 0.7) !important;
}

/* ========================
   Responsive Design
   ======================== */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section h2 {
        font-size: 1.3rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .skill-card, .experience-card, .education-card, .cert-card {
        margin-bottom: 1.5rem;
    }

    .experience-details li,
    .skill-list li {
        font-size: 0.95rem;
    }

    .navbar-nav .nav-link {
        margin: 0.5rem 0;
    }

    .social-icon {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
        margin: 0 8px;
    }

    .contact-item {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-section {
        min-height: 60vh;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .hero-section h2 {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-title::after {
        width: 70px;
    }

    .social-links .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }

    .badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
}

/* ========================
   Utility Classes
   ======================== */
.shadow {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;
}

.rounded-lg {
    border-radius: 12px;
}

.transition-all {
    transition: var(--transition);
}

/* ========================
   Scrollbar Styling
   ======================== */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}