/* ============================
   Invenio Fine Art Sourcing
   Premium Website Styles
   ============================ */

:root {
    --color-primary: #2BA88E;
    --color-primary-dark: #238F78;
    --color-navy: #1A2B4C;
    --color-navy-light: #2A3B5C;
    --color-gold: #C9A962;
    --color-cream: #FAF8F5;
    --color-warm-gray: #F5F0E8;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #FFFFFF;

    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Montserrat', -apple-system, sans-serif;

    --shadow-soft: 0 4px 20px rgba(26, 43, 76, 0.08);
    --shadow-medium: 0 8px 40px rgba(26, 43, 76, 0.12);
    --shadow-strong: 0 16px 60px rgba(26, 43, 76, 0.16);

    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-navy);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: var(--color-white);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 12px 0;
}

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

.logo img {
    height: 50px;
    transition: var(--transition);
}

.navbar.scrolled .logo img {
    height: 40px;
}

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

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--color-navy);
    position: relative;
}

.nav-links a:not(.btn-nav)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-links a:not(.btn-nav):hover::after {
    width: 100%;
}

.btn-nav {
    padding: 10px 24px;
    background: var(--color-primary);
    color: var(--color-white) !important;
    border-radius: 4px;
}

.btn-nav:hover {
    background: var(--color-primary-dark);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 24px;
}

.lang-btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--color-primary);
}

.lang-btn.active {
    color: var(--color-primary);
    background: rgba(43, 168, 142, 0.1);
}

.lang-separator {
    color: var(--color-text-light);
    font-size: 13px;
    font-weight: 300;
    user-select: none;
}

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

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.navbar.scrolled .mobile-toggle span {
    background: var(--color-navy);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-overlay {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left, rgba(43, 168, 142, 0.15), transparent);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 120px 0;
}

.hero-subtitle {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(42px, 6vw, 72px);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero h1 .highlight {
    color: var(--color-primary);
}

.hero-text {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 540px;
}

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

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.4; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 16px 32px;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(43, 168, 142, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    border-color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
}

.btn-full {
    width: 100%;
}

/* Sections */
.section {
    padding: 120px 0;
}

.section-subtitle {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 16px;
}

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

.section-header.center {
    text-align: center;
}

.section-header h2 {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 20px;
}

.section-intro {
    font-size: 18px;
    color: var(--color-text-light);
    max-width: 600px;
}

.section-header.center .section-intro {
    margin: 0 auto;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: clamp(32px, 4vw, 44px);
    margin-bottom: 24px;
}

.about-content .lead {
    font-size: 18px;
    color: var(--color-navy);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--color-text-light);
    margin-bottom: 40px;
}

.about-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 42px;
    font-weight: 600;
    color: var(--color-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
    z-index: 2;
    background: var(--color-white);
    padding: 20px;
    box-shadow: var(--shadow-medium);
}

.placeholder-art {
    aspect-ratio: 4/5;
    background: var(--color-warm-gray);
}

.image-accent {
    position: absolute;
    top: 40px;
    left: 40px;
    right: -40px;
    bottom: -40px;
    border: 2px solid var(--color-primary);
    z-index: 1;
}

/* Investment Section */
.investment {
    background: var(--color-white);
}

.investment-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.investment-card {
    padding: 40px 30px;
    background: var(--color-cream);
    border-radius: 8px;
    transition: var(--transition);
}

.investment-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 24px;
    color: var(--color-primary);
}

.investment-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
}

.investment-card p {
    font-size: 15px;
    color: var(--color-text-light);
}

/* Collection Section */
.collection {
    background: var(--color-navy);
}

.collection .section-subtitle,
.collection h2 {
    color: var(--color-white);
}

.collection-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 280px);
    gap: 24px;
}

.collection-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}

.collection-item.large {
    grid-row: span 2;
}

.collection-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: var(--transition);
}

.collection-image.renaissance {
    background: linear-gradient(135deg, #8B7355 0%, #A08060 50%, #6B5344 100%);
}

.collection-image.baroque {
    background: linear-gradient(135deg, #5D4E6D 0%, #7B6B8D 50%, #4A3D5C 100%);
}

.collection-image.neoclassical {
    background: linear-gradient(135deg, #4A6670 0%, #6B8890 50%, #3A5660 100%);
}

.collection-image.medieval {
    background: linear-gradient(135deg, #8B6914 0%, #AA8834 50%, #6B5004 100%);
}

.collection-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(26, 43, 76, 0.95), transparent);
    transform: translateY(20px);
    opacity: 0;
    transition: var(--transition);
}

.collection-item:hover .collection-overlay {
    transform: translateY(0);
    opacity: 1;
}

.collection-item:hover .collection-image {
    transform: scale(1.05);
}

.collection-period {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary);
}

.collection-overlay h3 {
    font-size: 24px;
    color: var(--color-white);
    margin: 8px 0;
}

.collection-overlay p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.collection-cta {
    text-align: center;
    margin-top: 50px;
}

/* Why Invest Section */
.why-invest {
    background: var(--color-cream);
}

.why-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.why-content h2 {
    font-size: clamp(32px, 4vw, 44px);
    margin-bottom: 20px;
}

.why-content .lead {
    font-size: 18px;
    color: var(--color-navy);
    margin-bottom: 32px;
}

.why-list {
    list-style: none;
}

.why-list li {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
}

.why-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.why-list strong {
    display: block;
    font-size: 18px;
    color: var(--color-navy);
    margin-bottom: 4px;
}

.why-list p {
    font-size: 15px;
    color: var(--color-text-light);
}

.why-visual {
    position: sticky;
    top: 120px;
}

.visual-card {
    background: var(--color-navy);
    padding: 60px 40px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
}

.big-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 72px;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1;
}

.stat-desc {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 16px;
    line-height: 1.6;
}

.visual-quote {
    padding: 30px;
    background: var(--color-white);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-soft);
}

.visual-quote blockquote {
    font-family: var(--font-serif);
    font-size: 20px;
    font-style: italic;
    color: var(--color-navy);
    line-height: 1.6;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info h2 {
    font-size: clamp(32px, 4vw, 44px);
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--color-text-light);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-item strong {
    display: block;
    color: var(--color-navy);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--color-text-light);
}

.contact-form-wrapper {
    background: var(--color-cream);
    padding: 50px;
    border-radius: 12px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-navy);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    font-family: var(--font-sans);
    font-size: 15px;
    border: 2px solid transparent;
    border-radius: 6px;
    background: var(--color-white);
    transition: var(--transition);
}

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

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

/* Footer */
.footer {
    background: var(--color-navy);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    height: 45px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 15px;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 16px;
    color: var(--color-white);
    margin-bottom: 24px;
    font-family: var(--font-sans);
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

.footer-legal a:hover {
    color: var(--color-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .about-grid,
    .why-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }

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

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

    .collection-item.large {
        grid-row: span 1;
    }

    .about-image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }

    .why-visual {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .visual-card {
        margin-bottom: 0;
    }
}

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

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        background: var(--color-navy);
        padding: 100px 40px;
        gap: 24px;
        transition: var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        color: var(--color-white) !important;
        font-size: 16px;
    }

    .mobile-toggle {
        display: flex;
        z-index: 1001;
    }

    .lang-toggle {
        margin-left: auto;
        margin-right: 16px;
    }

    .lang-btn {
        color: var(--color-navy);
    }

    .hero-content {
        padding: 140px 0 100px;
    }

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

    .hero-cta .btn {
        text-align: center;
    }

    .hero-scroll {
        display: none;
    }

    .about-stats {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
    }

    .stat {
        text-align: left;
    }

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

    .collection-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .collection-item {
        aspect-ratio: 16/9;
    }

    .collection-overlay {
        transform: translateY(0);
        opacity: 1;
    }

    .why-visual {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 30px 24px;
    }

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

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

    .image-accent {
        top: 20px;
        left: 20px;
        right: -20px;
        bottom: -20px;
    }
}

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

    .btn {
        padding: 14px 24px;
        font-size: 13px;
    }

    .stat-number {
        font-size: 36px;
    }

    .big-number {
        font-size: 56px;
    }
}