:root {
    /* Color Palette */
    --bg-color: #0f172a;        /* Sleek dark mode base */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-primary: #06b6d4;  /* Vibrant teal/cyan for dental */
    --accent-secondary: #3b82f6; /* Blue */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-main: 'Outfit', sans-serif;
    
    /* Spacing & Sizes */
    --nav-height: 80px;
    --container-padding: 2rem;
    --section-spacing: 120px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 800;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Utilities */
.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: none;
    font-family: var(--font-main);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Loader */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Navigation - RESPONSIVE */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.nav-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo .dot {
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 30px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    height: calc(100vh - var(--nav-height));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.mobile-menu a:hover {
    color: var(--accent-primary);
}

/* Hero Section */
.hero-section {
    min-height: 600px;
    padding-top: var(--nav-height);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
    padding-inline: var(--container-padding);
    align-items: center;
    position: relative;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 5.5rem);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

/* Glass & Graphic Elements */
.hero-graphic {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    justify-self: center;
    background-color: #ffffff;
    border-radius: 24px;
}

.hero-banner-img {
    width: 500px;
    max-width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 24px;
    display: block;
}

.glass-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.3;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-secondary);
    bottom: 0;
    right: 0;
    opacity: 0.2;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
}

.stat h3 {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat p {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* RESPONSIVE DESIGN (Media Queries) */
@media (max-width: 992px) {
    .nav-links {
        display: none; /* Ascundem link-urile si aratam meniul mobile */
    }
    
    .hamburger {
        display: flex;
    }

    #loginBtn {
        display: none; /* Ascundem pe ecrane mici pentru a face loc la meniu */
    }

    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--nav-height) + 4rem);
    }

    .hero-subtitle {
        margin-inline: auto;
    }

    .hero-buttons {
        justify-content: center;
    }
    
    .hero-graphic {
        height: 400px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .orb-1, .orb-2 {
        width: 250px;
        height: 250px;
    }
}

/* Content Sections */
.content-section {
    padding: var(--section-spacing) 0;
    position: relative;
    z-index: 2;
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.split-text h2 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin-bottom: 2rem;
}

.split-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.split-text .lead-text {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.split-visual {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-card {
    background: rgba(30, 41, 59, 0.7); /* Solid dark card for better visibility */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.feature-card.interactive-ready {
    transition: all 0.3s ease;
}

.feature-card.highlight-card:hover {
    transform: translateY(-8px);
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 15px 40px rgba(0,0,0, 0.5);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-primary);
    opacity: 0.9;
    margin-bottom: 0;
    font-weight: 500;
}

@media (max-width: 992px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
    
    .feature-card.highlight-card:hover {
        transform: translateY(-5px);
    }
}

/* Forms */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, 
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.15);
}

.form-group input::placeholder, 
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

/* Protect Dark Mode from Chrome Autofill */
.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover, 
.form-group input:-webkit-autofill:focus, 
.form-group textarea:-webkit-autofill,
.form-group textarea:-webkit-autofill:hover,
.form-group textarea:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--text-primary) !important;
    -webkit-box-shadow: 0 0 0px 1000px #1e293b inset !important;
    transition: background-color 5000s ease-in-out 0s;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.full-width {
    grid-column: 1 / -1;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-container input {
    width: 1.2rem;
    height: 1.2rem;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

/* Modal Popup */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex; justify-content: center; align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    transform: translateY(20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-width: 400px;
    width: 90%;
    text-align: center;
    padding: 3rem 2rem;
    margin: 0 auto;
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 80px; height: 80px;
    border-radius: 50%;
    display: inline-flex; justify-content: center; align-items: center;
    margin-inline: auto;
}

/* Footer */
.site-footer {
    background-color: var(--bg-color);
    padding: 6rem 0 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--glass-border);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Dynamic Images */
.dynamic-img {
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

.dynamic-img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(6, 182, 212, 0.3) !important;
    z-index: 10;
    position: relative;
}