/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --text-dark: #1f2937;
    --text-medium: #4b5563;
    --text-light: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    --border: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 
                 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-medium);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-white);
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    font-weight: 400;
}

.subtitle {
    font-size: 1.05rem;
    opacity: 0.85;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.cta-button {
    display: inline-block;
    background: var(--bg-white);
    color: var(--primary);
    padding: 1.1rem 2.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--bg-light);
}

/* ==========================================
   SECTIONS
   ========================================== */
.section {
    padding: 6rem 2rem;
}

.section-alt {
    background: var(--bg-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    font-size: 2.75rem;
    text-align: center;
    margin-bottom: 3.5rem;
    color: var(--text-dark);
    font-weight: 700;
    letter-spacing: -1px;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.15rem;
    line-height: 1.9;
    color: var(--text-medium);
    margin-bottom: 1.5rem;
    text-align: center;
}

/* ==========================================
   SKILLS GRID
   ========================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    text-align: center;
}

.skill-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    font-weight: 600;
}

.skill-card ul {
    list-style: none;
    text-align: left;
}

.skill-card li {
    padding: 0.65rem 0;
    color: var(--text-medium);
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.skill-card li:last-child {
    border-bottom: none;
}

/* ==========================================
   PROJECTS GRID
   ========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.project-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.15;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    line-height: 1;
}

.project-card h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.project-description {
    color: var(--text-medium);
    margin-bottom: 1.75rem;
    line-height: 1.8;
    font-size: 0.975rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-bottom: 1.75rem;
}

.tag {
    background: var(--bg-light);
    color: var(--primary);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--border);
}

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

.btn-primary,
.btn-secondary {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

.coming-soon {
    opacity: 0.6;
}

.coming-soon:hover {
    transform: none;
    opacity: 0.7;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-container {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.15rem;
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 3rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: var(--bg-white);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.contact-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.contact-btn .icon {
    font-size: 1.5rem;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--bg-dark);
    color: var(--bg-white);
    padding: 2.5rem 2rem;
    text-align: center;
}

.footer-content p {
    margin: 0.5rem 0;
    opacity: 0.9;
}

.footer-tech {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .nav-links {
        gap: 1.25rem;
        font-size: 0.875rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .hero {
        padding: 5rem 1.5rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    h2 {
        font-size: 2rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-links {
        flex-direction: column;
        gap: 1rem;
    }

    .contact-btn {
        width: 100%;
        justify-content: center;
    }

    .project-links {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.85rem;
    }

    .project-number {
        font-size: 2rem;
    }
}