/* 
   AURA Digital Dentistry - Design System
   Future Medical Concept
*/

:root {
    /* Colors - Clean, Premium, Restrained */
    --color-bg: #FCFCFD;
    --color-surface: #FFFFFF;
    --color-surface-glass: rgba(255, 255, 255, 0.7);
    
    --color-text-main: #1C1D20;
    --color-text-muted: #6E6E73;
    --color-text-light: #F5F5F7;
    
    --color-accent: #000000;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-glass-border: rgba(255, 255, 255, 0.5);
    
    --color-dark-bg: #151516;
    
    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    
    /* Radii */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    /* Transitions */
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
}

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

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

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

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

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1, h2, h3, h4, h5 {
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 600;
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-text-muted);
    max-w-600;
    margin-bottom: var(--space-lg);
    font-weight: 300;
}

.section-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: var(--space-md);
}

.text-body {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.text-muted { color: var(--color-text-muted); }
.text-light-muted { color: rgba(255, 255, 255, 0.5); }
.text-center { text-align: center; }

/* Layout & Containers */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-xl) 0;
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

@media (max-width: 900px) {
    .grid-2-col {
        grid-template-columns: 1fr;
    }
}

.align-center {
    align-items: center;
}

.mb-small { margin-bottom: var(--space-sm); }
.mb-medium { margin-bottom: var(--space-md); }
.mb-large { margin-bottom: var(--space-lg); }
.mt-medium { margin-top: var(--space-md); }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-600 { max-width: 600px; }
.w-100 { width: 100%; }

.bg-light { background-color: var(--color-surface); }
.bg-dark { background-color: var(--color-dark-bg); }
.text-white { color: var(--color-text-light); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 100px;
    font-weight: 500;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: #333;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--color-surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-fast);
}

.header.scrolled {
    padding: 0.5rem 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-main);
    opacity: 0.8;
    transition: var(--transition-fast);
}

.nav-link:hover {
    opacity: 1;
}

.nav-button {
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--color-accent);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 100px;
    transition: var(--transition-fast);
}

.nav-button:hover {
    background: #333;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-main);
}

@media (max-width: 768px) {
    .nav {
        display: none; /* simple mobile hide for concept */
    }
    .mobile-menu-btn {
        display: block;
    }
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: right center;
    opacity: 0.8;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--color-bg) 0%, var(--color-bg) 40%, rgba(252,252,253,0) 100%);
}

@media (max-width: 900px) {
    .hero-gradient {
        background: linear-gradient(0deg, var(--color-bg) 0%, var(--color-bg) 60%, rgba(252,252,253,0) 100%);
    }
}

.hero-content {
    max-width: 700px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.scroll-dot {
    width: 4px;
    height: 4px;
    background: var(--color-text-main);
    border-radius: 50%;
    animation: scrollAnim 2s infinite;
}

@keyframes scrollAnim {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(20px); opacity: 0; }
}

/* Images */
.fluid-image {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.radius-large {
    border-radius: var(--radius-lg);
}

.glass-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 8px;
    background: rgba(255,255,255,0.4);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.tech-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: var(--transition-smooth);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border-color: rgba(0,0,0,0.15);
}

.tech-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #F0F0F2;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--color-text-main);
}

.tech-card h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.tech-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Workflow Roadmap */
.roadmap {
    position: relative;
    padding-left: 2rem;
}

.roadmap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 7px;
    width: 2px;
    height: 100%;
    background: var(--color-border);
}

.roadmap-item {
    position: relative;
    margin-bottom: 2rem;
    opacity: 0.5;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.roadmap-item:last-child {
    margin-bottom: 0;
}

.roadmap-item.active, .roadmap-item:hover {
    opacity: 1;
}

.roadmap-marker {
    position: absolute;
    left: -2rem;
    top: 0.2rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    transition: var(--transition-smooth);
}

.roadmap-item.active .roadmap-marker {
    border-color: var(--color-accent);
    background: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(0,0,0,0.1);
}

.roadmap-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.roadmap-content p {
    color: var(--color-text-muted);
}

/* Interactive Visual */
.interactive-visual-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, #F0F0F2 0%, var(--color-bg) 70%);
    border-radius: 50%;
}

.visual-ring {
    position: absolute;
    width: 60%;
    height: 60%;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.visual-ring::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--color-text-main);
    border-radius: 50%;
}

.visual-ring.ring-2 {
    width: 80%;
    height: 80%;
    animation: rotate 30s linear infinite reverse;
    border: 1px dashed rgba(0,0,0,0.1);
}

.visual-core {
    width: 20%;
    height: 20%;
    background: var(--color-surface-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    z-index: 2;
    transition: var(--transition-smooth);
}

.visual-data {
    position: absolute;
    bottom: 10%;
    background: var(--color-surface);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    z-index: 3;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Team */
.quote-block {
    margin-top: 2rem;
    padding-left: 1.5rem;
    border-left: 2px solid var(--color-accent);
}

.quote-text {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-text-main);
    margin-bottom: 1rem;
}

.quote-author {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* Environment Showcase */
.image-showcase {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
}

.overlay-text h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.overlay-text p {
    color: rgba(255,255,255,0.7);
}

/* Contact */
.info-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.info-value {
    font-size: 1.125rem;
    font-weight: 500;
}

.glass-form {
    background: var(--color-surface);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.03);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text-main);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 1rem;
    background: #F5F5F7;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    background: var(--color-surface);
    border-color: var(--color-border);
    box-shadow: 0 0 0 4px rgba(0,0,0,0.05);
}

.form-success-message {
    margin-top: 1rem;
    padding: 1rem;
    background: #E8F5E9;
    color: #2E7D32;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-success-message.hidden {
    display: none;
}

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

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-legal a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

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

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}