/* ==========================================
   DANIEL STEFANUS PORTFOLIO
   Minimalist IT Engineer Aesthetic
   ========================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --maroon: #800020;
    --maroon-dark: #6a001a;
    --black: #000000;
    --white: #FFFFFF;
    --off-white: #F5F5F5;

    /* Secondary Colors */
    --dark-gray: #1A1A1A;
    --gray: #2C2C2C;
    --light-gray: #E5E5E5;
    --border-gray: #CCCCCC;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 120px 0;
    --container-max: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--black);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
    color: var(--gray);
    max-width: 65ch;
}

.accent {
    color: var(--maroon);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

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

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

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

.btn-full {
    width: 100%;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--light-gray);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--maroon);
    transition: width var(--transition-normal);
}

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

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

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--black);
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--off-white);
    border-radius: 4px;
    margin-bottom: 24px;
}

.terminal-text {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--maroon);
}

.hero-title {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--light-gray);
    border-bottom: 1px solid var(--light-gray);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--black);
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background-color: var(--light-gray);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-decoration {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 50%;
    pointer-events: none;
}

.grid-pattern {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    background-image:
        linear-gradient(var(--light-gray) 1px, transparent 1px),
        linear-gradient(90deg, var(--light-gray) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
}

/* Section Styles */
section {
    padding: var(--section-padding);
}

.section-header {
    margin-bottom: 60px;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--maroon);
    display: block;
    margin-bottom: 8px;
}

.section-title {
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--maroon);
}

/* About Section */
.about {
    background-color: var(--off-white);
}

.about-intro {
    font-size: 24px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 24px;
    line-height: 1.4;
}

.about-text p {
    margin-bottom: 20px;
}

.about-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--light-gray);
}

.highlight {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.highlight:hover {
    border-color: var(--maroon);
}

.highlight-icon {
    font-size: 18px;
}

/* Portfolio Section - Gallery Style */
.portfolio {
    background-color: var(--white);
}

.portfolio-filter {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 500;
    background: transparent;
    border: 1px solid var(--light-gray);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.portfolio-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    aspect-ratio: 16 / 10;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 50%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gallery-category {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 6px 12px;
    background-color: var(--maroon);
    border-radius: 2px;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item.hidden {
    display: none;
}

/* Services Section */
.services {
    background-color: var(--off-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    padding: 32px;
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    transition: all var(--transition-normal);
}

.service-card:hover {
    border-color: var(--maroon);
    transform: translateY(-4px);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--off-white);
    border-radius: 8px;
    margin-bottom: 20px;
    color: var(--maroon);
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    background-color: var(--black);
    color: var(--white);
}

.contact .section-header.light .section-number {
    color: var(--maroon);
}

.contact .section-header.light .section-title {
    color: var(--white);
}

.contact .section-header.light .section-title::after {
    background-color: var(--maroon);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-intro {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
    text-decoration: none;
    font-size: 15px;
    transition: color var(--transition-fast);
}

.contact-item svg {
    color: var(--maroon);
}

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

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    font-family: var(--font-primary);
    font-size: 15px;
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--maroon);
    background-color: rgba(255, 255, 255, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    padding: 40px 0;
    background-color: var(--black);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer .logo {
    color: var(--white);
}

.footer p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.social-links a:hover {
    color: var(--maroon);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 32px;
        background-color: var(--white);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links a {
        font-size: 18px;
    }

    .hero-stats {
        flex-wrap: wrap;
        justify-content: center;
    }

    .stat-divider {
        display: none;
    }

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

    .hero-cta .btn {
        width: 100%;
    }

    .hero-decoration {
        display: none;
    }

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

    .portfolio-gallery {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .about-highlights {
        flex-direction: column;
    }

    .highlight {
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-stats { animation-delay: 0.4s; }
.hero-cta { animation-delay: 0.5s; }

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}