/* Modern & Bold Blog Theme */
/* devanharikumar.com */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --accent: #f97316;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1.5rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--gray-700);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: var(--gradient);
    opacity: 0.05;
    border-radius: 50%;
    transform: rotate(-15deg);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero h1 {
    margin-bottom: 1.5rem;
}

.hero h1 span {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray-500);
    max-width: 600px;
    margin-bottom: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    color: var(--white);
}

.btn-secondary {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Sections */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header p {
    color: var(--gray-500);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 1rem auto 0;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.card-image {
    width: 100%;
    height: 200px;
    background: var(--gradient);
    position: relative;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-content {
    padding: 1.5rem;
}

.card-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.card h3 {
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    width: 100%;
    height: 500px;
    background: var(--gradient);
    border-radius: 1rem;
    position: relative;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1rem;
}

.about-content h2 {
    margin-bottom: 1.5rem;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: 25px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    height: 300px;
    background: var(--gradient);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.portfolio-overlay p {
    color: var(--gray-300);
    margin-bottom: 0;
}

/* Blog Post */
.blog-post {
    padding-top: 120px;
}

.post-header {
    text-align: center;
    margin-bottom: 3rem;
}

.post-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--gray-500);
    margin-top: 1rem;
}

.post-content {
    font-size: 1.125rem;
}

.post-content h2 {
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

.post-content img {
    width: 100%;
    border-radius: 1rem;
    margin: 2rem 0;
}

.post-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 2rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--gray-500);
}

.post-content code {
    background: var(--gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
}

.post-content pre {
    background: var(--dark);
    color: var(--gray-100);
    padding: 1.5rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 2rem 0;
}

.post-content pre code {
    background: none;
    padding: 0;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    margin-bottom: 1.5rem;
}

.contact-links {
    margin-top: 2rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.contact-link-icon {
    width: 50px;
    height: 50px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.contact-form {
    background: var(--gray-100);
    padding: 2.5rem;
    border-radius: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    background: var(--white);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background: var(--dark);
    color: var(--gray-300);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    margin-bottom: 1rem;
    display: inline-block;
}

.footer-brand p {
    color: var(--gray-500);
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-500);
}

.footer-links a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gray-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-300);
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 2rem;
    text-align: center;
    color: var(--gray-500);
}

/* Page Header */
.page-header {
    padding: 10rem 0 4rem;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--white) 100%);
    text-align: center;
}

.page-header h1 {
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--gray-500);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 968px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
    }

    section {
        padding: 4rem 0;
    }
}