/* Layout & Grid */
.container {
    max-width: var(--bp-xl);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4.5rem;
}

.logo {
    font-size: var(--text-lg);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-base);
}

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

section {
    padding: var(--space-16) 0;
}

section:nth-child(even) {
    background-color: var(--bg-alt);
}

/* Typography Utility */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 4.5rem;
}

#hero h1 {
    font-size: clamp(2.5rem, 8vw, var(--text-5xl));
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

#hero .subtitle {
    font-size: clamp(1.125rem, 3vw, var(--text-xl));
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: 1.6;
}

#hero .ctas {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}

/* Unified Section Titles */
h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-12);
    letter-spacing: -0.01em;
}

/* About Section: Story & Stack */
.about-story-grid {
    display: grid;
    gap: var(--space-12);
}

@media (min-width: 1024px) {
    .about-story-grid {
        grid-template-columns: 1.5fr 1fr;
        align-items: start;
    }
}

.about-story p {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    max-width: 750px;
}

.about-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

@media (min-width: 1024px) {
    .about-stack {
        padding-left: var(--space-8);
        border-left: 1px solid var(--border-color);
    }
}

@media (max-width: 1023px) {
    .about-stack {
        padding-top: var(--space-8);
        border-top: 1px solid var(--border-color);
        flex-direction: row;
        flex-wrap: wrap;
    }
    .stack-category {
        flex: 1 1 200px;
    }
}

.stack-category h4 {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted-color);
    margin-bottom: var(--space-2);
}

.stack-category p {
    font-size: var(--text-base);
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.4;
}

/* Expertise Grid */
.expertise-grid {
    display: grid;
    gap: var(--space-8);
    border-top: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .expertise-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.expertise-item {
    padding: var(--space-8) 0;
    transition: var(--transition-base);
}

.expertise-item h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
    font-weight: 700;
}

.expertise-item p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Projects Stack */
.projects-stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.project-feature {
    display: grid;
    gap: var(--space-12);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.project-feature:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

@media (min-width: 1024px) {
    .project-feature {
        grid-template-columns: 1.1fr 0.9fr;
        align-items: center;
    }
    .project-feature:nth-child(even) {
        direction: rtl;
    }
    .project-feature:nth-child(even) .project-details {
        direction: ltr;
        text-align: left;
    }
}

.project-visual {
    background-color: var(--bg-alt);
    aspect-ratio: 16/10;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--space-8); /* Added padding for SVG/Logo fit */
}

.project-visual img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Changed from cover to contain for proper SVG scaling */
}

.project-details {
    padding: var(--space-12);
}

.project-category {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: var(--space-2);
    display: block;
}

.project-details h3 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-4);
}

.project-details p {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-8); /* Increased spacing before tech tags */
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-12); /* Increased spacing before button */
}

.project-tech span {
    font-size: var(--text-xs);
    padding: 0.25rem 0.75rem;
    background: var(--bg-alt);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-weight: 500;
}

/* Contact Section */
.contact-grid {
    display: grid;
    gap: var(--space-12);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr 1.5fr;
    }
}

.form-actions {
    margin-top: var(--space-4); /* Reduced from space-8 */
}

/* Substantial Footer */
footer {
    padding: var(--space-12) 0;
    background-color: var(--text-primary);
    color: var(--bg-color);
}

.footer-content {
    display: grid;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
}

.footer-links h4, .footer-social h4 {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
    opacity: 0.6;
}

.footer-links ul, .footer-social ul {
    list-style: none;
    padding: 0;
}

.footer-links li, .footer-social li {
    margin-bottom: var(--space-2);
}

.footer-links a, .footer-social a {
    color: var(--bg-color);
    opacity: 0.8;
    transition: var(--transition-base);
}

.footer-links a:hover, .footer-social a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer-bottom {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    opacity: 0.6;
}