:root {
    /* Color Palette */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-glow: rgba(56, 189, 248, 0.2);

    /* Typography */
    --font-main: 'Inter', sans-serif;

    /* Spacing & Layout */
    --container-width: 1200px;
    --nav-height: 80px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography Utility */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

p {
    color: var(--text-secondary);
}

span {
    color: var(--accent-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Navbar */
#navbar {
    height: var(--nav-height);
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

#navbar.scrolled {
    height: 70px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

#navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    background:
        radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.1), transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(56, 189, 248, 0.05), transparent 40%),
        var(--bg-primary);
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCI+PGNpcmNsZSBjeD0iMSIgY3k9IjEiIHI9IjEiIGZpbGw9InJnYmEoNTYsIDE4OSwgMjQ4LCAwLjA1KSIvPjwvc3ZnPg==');
    opacity: 0.5;
}

.hero-content {
    max-width: 850px;
    position: relative;
    z-index: 1;
}

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

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
}

/* Section Common Styles */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

/* Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.portfolio-item-placeholder {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.portfolio-item-placeholder:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.placeholder-img {
    height: 240px;
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-img::after {
    content: 'View Project';
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    transition: bottom 0.3s ease;
}

.portfolio-item-placeholder:hover .placeholder-img::after {
    bottom: 20px;
}

.placeholder-info {
    padding: 1.5rem;
}

/* Process Section */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.step {
    position: relative;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--bg-secondary);
    margin-bottom: -1.5rem;
    opacity: 0.5;
}

.step h3 {
    margin-bottom: 1rem;
    position: relative;
}

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

.visual-placeholder {
    height: 400px;
    background-color: var(--bg-secondary);
    border-radius: 20px;
    position: relative;
}

.visual-placeholder::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px dashed var(--accent-primary);
    border-radius: 20px;
    top: 20px;
    left: 20px;
    z-index: -1;
    opacity: 0.2;
}

/* Testimonials Section */
.testimonials-placeholder {
    padding: 4rem;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    text-align: center;
    border: 1px dashed var(--accent-primary);
}

.placeholder-text {
    font-size: 1.5rem;
    font-style: italic;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
}

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

.contact-info p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-icon {
    width: 50px;
    height: 50px;
    background-color: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.social-icon:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-5px);
}

.contact-form-container {
    background-color: var(--bg-secondary);
    padding: 3rem;
    border-radius: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--bg-secondary);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
}

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

/* Footer */
footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--bg-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

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

.footer-links h4,
.footer-legal h4 {
    margin-bottom: 1.5rem;
}

.footer-links ul li,
.footer-legal ul li {
    margin-bottom: 0.8rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--bg-secondary);
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    h1 {
        font-size: 2.4rem;
    }

    .hero-btns {
        flex-direction: column;
    }
}