:root {
    --primary-color: #E63946;  /* Red */
    --secondary-color: #457B9D; /* Blue */
    --bg-color: #FFFFFF;        /* White */
    --text-color: #1D3557;      /* Black/Dark */
    --light-bg: #F8F9FA;
    --border-color: #E2E8F0;
    --transition-speed: 0.3s;
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed) ease;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; position: relative; padding-bottom: 0.5rem; }
h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}
h3 { font-size: 1.5rem; }
p { margin-bottom: 1rem; }

/* Buttons & Links */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: #d62828;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(230, 57, 70, 0.2);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--bg-color);
}

.btn-secondary:hover {
    background-color: #1d3557;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(69, 123, 157, 0.2);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.section-padding { padding: 5rem 0; }

/* Navigation */
.navbar {
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.5px;
}

.logo .dot {
    color: var(--primary-color);
}

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

.nav-links a {
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    padding: 0.5rem 0;
}

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

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

.nav-links a:hover,
.nav-links a.active-link {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: white;
    padding-top: 4rem;
}

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

.footer-info h3 {
    color: white;
}

.footer-info .dot {
    color: var(--primary-color);
}

.footer-info p {
    color: #a0aec0;
    max-width: 300px;
}

.footer-links h4, .footer-social h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

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

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

.footer-links a {
    color: #a0aec0;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

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

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all var(--transition-speed) ease;
}

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

.footer-bottom {
    background-color: #1a202c;
    text-align: center;
    padding: 1.5rem 0;
    color: #a0aec0;
    font-size: 0.9rem;
}

/* Hero Section */
.hero {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    background-color: var(--light-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(69, 123, 157, 0.1) 0%, rgba(248, 249, 250, 0) 70%);
}

.hero-content {
    max-width: 600px;
    position: relative;
    z-index: 10;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Page Headers */
.page-header {
    background-color: var(--light-bg);
    padding: 4rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    margin-bottom: 0.5rem;
}

.page-header p {
    color: #4a5568;
    max-width: 600px;
    margin: 0 auto;
}

/* Sections */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--bg-color);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--secondary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(69, 123, 157, 0.1);
    color: var(--secondary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.feature-card:nth-child(2) .feature-icon {
    background-color: rgba(230, 57, 70, 0.1);
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

/* Skills Page */
.skills-category {
    margin-bottom: 4rem;
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.skill-item {
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.skill-item:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.05);
}

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

.contact-info-card {
    background-color: var(--light-bg);
    padding: 2.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.contact-info-card h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.info-icon {
    color: var(--primary-color);
}

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

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed) ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(69, 123, 157, 0.1);
}

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

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

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

.about-image {
    background-color: var(--light-bg);
    border-radius: 20px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    position: relative;
}

.about-image::after {
    content: '';
    position: absolute;
    top: 20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary-color);
    border-radius: 20px;
    z-index: -1;
}

/* Responsive */
@media (max-width: 991px) {
    .hero h1 { font-size: 2.8rem; }
    .about-content, .contact-wrapper { grid-template-columns: 1fr; gap: 3rem; }
    .footer-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .nav-links {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        gap: 0;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s ease-in-out;
    }
    
    .nav-links.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links a {
        display: block;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links a::after { display: none; }
    
    .hero { min-height: auto; padding: 4rem 0; text-align: center; }
    .hero-buttons { justify-content: center; }
    .footer-container { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 576px) {
    .hero h1 { font-size: 2.2rem; }
    .hero-buttons { flex-direction: column; }
    .section-padding { padding: 3rem 0; }
}