/* General Styles */
body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--headings-color);
}

h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 2rem;
    margin-bottom: 2rem;
}

section {
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Theme Variables */
:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --primary-color: #bb86fc;
    --secondary-color: #03dac6;
    --headings-color: #ffffff;
    --card-bg-color: #1e1e1e;
    --border-color: #2c2c2c;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body.light-theme {
    --bg-color: #f5f5f5;
    --text-color: #333333;
    --primary-color: #6200ee;
    --secondary-color: #03dac6;
    --headings-color: #000000;
    --card-bg-color: #ffffff;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Header */
header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
    background: linear-gradient(145deg, var(--bg-color) 0%, #1f1f1f 100%);
    border-bottom: 1px solid var(--border-color);
}

body.light-theme header {
    background: linear-gradient(145deg, #f5f5f5 0%, #e0e0e0 100%);
}

.profile-pic {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 2rem;
    border: 7px solid var(--primary-color);
    box-shadow: 0 0 25px var(--primary-color);
    transition: transform 0.3s ease-in-out;
}

body.light-theme .profile-pic {
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

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

header h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    animation: fadeInDown 1s ease-in-out;
}

header h2 {
    font-size: 1.8rem;
    margin-top: 0;
    font-weight: 400;
    color: var(--secondary-color);
    animation: fadeInUp 1s ease-in-out;
}

body.light-theme header h2 {
    color: #555555;
}

header p {
    font-size: 1.1rem;
    color: var(--text-color);
}

.social-links a {
    color: var(--text-color);
    font-size: 1.8rem;
    margin: 0 1rem;
    transition: color 0.3s, transform 0.3s;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

/* Theme Switcher */
.theme-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
}

#theme-toggle {
    background: var(--card-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s, color 0.3s;
}

#theme-toggle:hover {
    background: var(--primary-color);
    color: #ffffff;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.timeline-item {
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 10px;
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px var(--shadow-color);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    gap: 1.5rem;
}

.timeline-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px var(--shadow-color);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -3rem;
    top: 2.5rem;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    border: 4px solid var(--bg-color);
}

.company-logo {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
}

.company-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.company-details {
    display: flex;
    flex-direction: column;
}

.company-details .company-name {
    margin: 0 0 1.5rem 0;
    font-size: 1.6rem;
    color: var(--primary-color);
}

.designation {
    margin-bottom: 1rem;
}

.designation:last-child {
    margin-bottom: 0;
}

.designation h5 {
    margin: 0 0 0.5rem 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.designation span {
    font-size: 1rem;
    opacity: 0.8;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1.5rem;
}

.skills-grid span {
    padding: 1.5rem;
    text-align: center;
    border-radius: 10px;
    font-weight: 600;
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    transition: transform 0.3s, box-shadow 0.3s, color 0.3s;
}

.skills-grid span:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 20px var(--shadow-color);
    color: var(--primary-color);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg-color);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px var(--shadow-color);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.project-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.project-card-content {
    padding: 1.5rem;
}

.project-card h4 {
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.project-card p {
    margin: 0 0 1.5rem 0;
}

.project-links a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
    margin-right: 1rem;
    transition: color 0.3s;
}

.project-links a:hover {
    color: var(--primary-color);
}

/* Education */
.education-item {
    padding: 2rem;
    border-radius: 10px;
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-color);
}

.education-item h4 {
    margin: 0 0 0.5rem 0;
    color: var(--primary-color);
}

.education-item p {
    margin: 0;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

/* Keyframe Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }

    header h1 {
        font-size: 2.8rem;
    }

    header h2 {
        font-size: 1.5rem;
    }

    .profile-pic {
        width: 150px;
        height: 150px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2.2rem;
    }

    header h2 {
        font-size: 1.2rem;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .timeline-item {
        flex-direction: column;
    }

    .company-logo {
        margin-bottom: 1rem;
    }
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 1rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 2rem;
    transition: background-color 0.3s, transform 0.3s;
}

.cta-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}