/* ==========================================================================
   Kőszeghy Építészet - Modern Design System & Stylesheet
   ========================================================================== */

/* 1. Imports & Variables */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
    /* Color Palette */
    --bg-dark: #121212;
    --bg-card: #1e1e1e;
    --bg-nav: rgba(18, 18, 18, 0.85);
    --text-primary: #eaeaea;
    --text-secondary: #aaaaaa;
    --text-muted: #666666;
    
    /* Accents */
    --accent-gold: #cfa846;
    --accent-gold-hover: #e0be63;
    --accent-red: #ab2e3c;
    --accent-red-hover: #c93b4a;
    
    /* Typography */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
    
    /* Layout Variables */
    --max-width: 1200px;
    --nav-height: 70px;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --transition-curve: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 2. Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-dark);
    scroll-padding-top: var(--nav-height);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.03em;
}

/* 3. Layout Containers */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    font-weight: 300;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 2px;
    background-color: var(--accent-gold);
    margin: 0.8rem auto 0;
}

/* 4. Navigation Header */
body > header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: var(--bg-dark); /* Solid black background on subpages by default */
    z-index: 99999 !important; /* Force on top of all text */
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

/* Glassmorphism only for homepage where the header overlays the hero slideshow */
body:not(.subpage) > header {
    background-color: var(--bg-nav);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

body > header.scrolled,
body:not(.subpage) > header.scrolled {
    background-color: #121212; /* Completely solid dark color when scrolled */
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

body.subpage > header {
    background-color: #121212 !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    z-index: 99999 !important;
}

body > header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-group {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.logo-sub {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: var(--accent-gold);
    text-transform: uppercase;
    margin-top: -2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-gold);
    transition: width var(--transition-speed);
}

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

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: transform 0.3s, opacity 0.3s;
}

/* 5. Hero Slideshow Section */
.hero-slideshow {
    height: 65vh;
    min-height: 480px;
    position: relative;
    background-color: #0b0b0b;
    margin-top: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.slides-container {
    width: 100%;
    height: 100%;
    max-width: 500px;
    aspect-ratio: 1 / 1;
    position: relative;
    background-color: #121212;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    cursor: pointer;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s var(--transition-curve), visibility 1s;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.slide-img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Display entire 1:1 image without cropping */
    background-color: #121212;
}

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.7) 70%, rgba(0, 0, 0, 0) 100%);
    padding: 1.5rem;
    z-index: 10;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s 0.3s var(--transition-curve), transform 0.6s 0.3s var(--transition-curve);
    text-align: center;
}

.slide.active .slide-content {
    opacity: 1;
    transform: translateY(0);
}

.slide-title {
    font-size: 1.35rem;
    font-weight: 400;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.slide-desc {
    font-size: 0.8rem;
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--accent-gold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Hero Controls */
.slideshow-nav {
    position: absolute;
    width: 100%;
    max-width: 720px; /* Sits outside the 500px container */
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    z-index: 10;
}

.slideshow-btn {
    pointer-events: auto;
    background: rgba(30, 30, 30, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    transition: background var(--transition-speed), border-color var(--transition-speed), color var(--transition-speed);
}

.slideshow-btn:hover {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-dark);
}

.slideshow-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.slideshow-btn:hover {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-dark);
}

/* 6. Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.project-card {
    background-color: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-speed) var(--transition-curve), box-shadow var(--transition-speed);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.card-img-wrapper {
    width: 100%;
    height: 220px;
    position: relative;
    overflow: hidden;
    background-color: #252525;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--transition-curve);
}

.project-card:hover .card-img {
    transform: scale(1.08);
}

.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
    color: var(--text-primary);
    transition: color var(--transition-speed);
}

.project-card:hover .card-title {
    color: var(--accent-gold);
}

.card-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: auto;
}

/* 7. Lightbox Modal Gallery */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 10, 10, 0.98);
    z-index: 100000;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed), visibility var(--transition-speed);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-header {
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.lightbox-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-primary);
}

.lightbox-close {
    background: rgba(20, 20, 20, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    font-size: 2.2rem;
    cursor: pointer;
    transition: color var(--transition-speed), background-color var(--transition-speed), border-color var(--transition-speed);
    position: absolute;
    top: 15px;
    right: 15px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100100;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
    line-height: 1;
    padding-bottom: 4px;
}

.lightbox-close:hover {
    color: var(--accent-gold);
    background: rgba(30, 30, 30, 0.95);
    border-color: var(--accent-gold);
}

.lightbox-main {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    position: relative;
}

.lightbox-arrow {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
    z-index: 10;
}

.lightbox-arrow:hover {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-dark);
}

.lightbox-content-wrapper {
    max-width: 85%;
    max-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.lightbox-img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    opacity: 0;
    transform: scale(0.97);
    transition: opacity 0.4s var(--transition-curve), transform 0.4s var(--transition-curve);
}

.lightbox-img.loaded {
    opacity: 1;
    transform: scale(1);
}

/* Lightbox Footer & Thumbs */
.lightbox-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.lightbox-caption {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
}

.lightbox-counter {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.lightbox-thumbs {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    width: 100%;
    max-width: 800px;
    padding: 0.5rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-gold) rgba(255, 255, 255, 0.05);
}

/* Webkit Scrollbars for thumbs */
.lightbox-thumbs::-webkit-scrollbar {
    height: 4px;
}
.lightbox-thumbs::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}
.lightbox-thumbs::-webkit-scrollbar-thumb {
    background: var(--accent-gold);
    border-radius: 2px;
}

.lightbox-thumb {
    width: 60px;
    height: 45px;
    object-fit: cover;
    cursor: pointer;
    opacity: 0.4;
    transition: opacity var(--transition-speed), border-color var(--transition-speed);
    border: 1px solid transparent;
    border-radius: 4px;
    flex-shrink: 0;
}

.lightbox-thumb.active {
    opacity: 1;
    border-color: var(--accent-gold);
}

.lightbox-thumb:hover {
    opacity: 1;
}

/* 8. Research Introduction Section ("Tájolás") */
.research-teaser {
    background-color: var(--bg-card);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.research-teaser-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.teaser-lead {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 300;
    margin-bottom: 1.5rem;
    line-height: 1.4;
    color: var(--accent-gold);
}

.teaser-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

/* 9. Elegant Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: var(--border-radius);
    transition: background var(--transition-speed), color var(--transition-speed), transform var(--transition-speed);
    cursor: pointer;
}

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

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

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

.btn-secondary:hover {
    background: var(--accent-gold);
    color: var(--bg-dark);
    transform: translateY(-2px);
}

/* 10. Research Page ("Tájolás.html") Styling */
body.subpage {
    padding-top: var(--nav-height);
}

.research-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.research-header {
    text-align: center;
    margin-bottom: 4rem;
}

.research-title {
    font-size: 2.8rem;
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.research-meta {
    font-size: 0.9rem;
    color: var(--accent-gold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.research-content p {
    margin-bottom: 1.8rem;
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 300;
    text-align: justify;
}

.research-content p strong {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 400;
    display: block;
    margin-bottom: 1rem;
    line-height: 1.4;
    text-align: left;
}

.research-downloads {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3.5rem;
}

.download-card {
    background-color: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color var(--transition-speed), transform var(--transition-speed);
}

.download-card:hover {
    border-color: var(--accent-gold);
    transform: translateY(-4px);
}

.download-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.download-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* 11. Principles / Under Construction Pages */
.placeholder-body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
}

.placeholder-icon {
    font-size: 3rem;
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
}

.placeholder-title {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
}

.placeholder-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 2rem;
}

/* 12. Contact / Footer Section */
footer {
    background-color: #0b0b0b;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

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

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    max-width: 320px;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.footer-contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-contact-info a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-img-wrapper {
    position: relative;
    overflow: hidden;
}

.card-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 5;
    background: rgba(10, 10, 10, 0.65);
    padding: 5px 10px;
    border-radius: 20px;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.card-dot.active {
    background: var(--accent-gold);
    transform: scale(1.25);
}

/* 13. Mobile Responsiveness */
@media (max-width: 968px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }
    
    .section {
        padding: 3.5rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* Mobile Menu Drawer */
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - var(--nav-height));
        background-color: #151515;
        flex-direction: column;
        padding: 3rem 2rem;
        gap: 1.5rem;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
        transition: left 0.4s var(--transition-curve);
        z-index: 999;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .mobile-nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .mobile-nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    
    /* Hero Controls & Slideshow Mobile Styles */
    .hero-slideshow {
        height: auto;
        min-height: auto;
        padding: 2rem 1rem;
        flex-direction: column;
    }
    
    .slides-container {
        max-width: 100%;
        width: 100%;
        aspect-ratio: 1 / 1;
    }
    
    .slideshow-nav {
        position: relative;
        width: 100%;
        max-width: 100%;
        margin-top: 1rem;
        justify-content: center;
        gap: 1.5rem;
    }
    
    .slideshow-btn {
        width: 45px;
        height: 45px;
    }
    
    .slide-title {
        font-size: 1.15rem;
    }
    
    /* Lightbox Modal */
    .lightbox-header {
        padding: 0 1rem;
    }
    
    .lightbox-title {
        font-size: 1.1rem;
    }
    
    .lightbox-main {
        padding: 0.5rem;
    }
    
    .lightbox-arrow {
        width: 40px;
        height: 40px;
    }
    
    .lightbox-content-wrapper {
        max-width: 95%;
    }
    
    .lightbox-footer {
        padding: 1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-brand {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}