/* Minimal Portfolio Template - CSS */

/* CSS Variables */
:root {
    --color-black: #0a0a0a;
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    --font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    --radius: 4px;
    --transition: all 0.2s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-black);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

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

/* Loading */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-gray-200);
    border-top-color: var(--color-black);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-600);
    position: relative;
}

.nav-link:hover {
    color: var(--color-black);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-black);
    transition: var(--transition);
}

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

/* Hero */
.hero {
    padding: calc(70px + var(--space-3xl)) 0 var(--space-3xl);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-sm);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    font-weight: 400;
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
}

.hero-bio {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 540px;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.hero-social {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

/* Sections */
.section {
    padding: var(--space-3xl) 0;
}

.section-alt {
    background: var(--color-gray-100);
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

/* Work */
.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.work-item {
    display: block;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.work-item:hover {
    border-color: var(--color-gray-400);
    transform: translateY(-2px);
}

.work-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    background: var(--color-gray-100);
}

.work-image-placeholder {
    width: 100%;
    aspect-ratio: 16 / 10;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    color: var(--color-gray-400);
}

.work-content {
    padding: var(--space-md);
}

.work-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.work-description {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* Skills */
.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-item {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-weight: 500;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-image {
    position: sticky;
    top: 100px;
}

.about-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: var(--radius);
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius);
    font-size: 4rem;
    font-weight: 600;
    color: var(--color-gray-300);
}

.about-content p {
    font-size: 1.0625rem;
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.about-experience {
    margin-bottom: var(--space-xl);
}

.about-experience h3,
.about-education h3 {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-400);
    margin-bottom: var(--space-md);
}

.experience-item,
.education-item {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.experience-item:last-child,
.education-item:last-child {
    border-bottom: none;
}

.experience-title,
.education-degree {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.experience-company,
.education-school {
    font-size: 0.9375rem;
    color: var(--color-gray-500);
    margin-bottom: 0.25rem;
}

.experience-period,
.education-period {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

/* Contact */
.contact {
    text-align: center;
}

.contact-text {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: center;
    margin-bottom: var(--space-xl);
}

.contact-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--color-black);
}

.contact-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-gray-500);
}

.contact-social {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
}

/* Footer */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-gray-200);
}

.footer p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero {
        padding: calc(70px + var(--space-2xl)) 0 var(--space-2xl);
        min-height: auto;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .about-image {
        position: static;
        max-width: 200px;
    }
    
    .work-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
}

/* Utility */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}