/* ClinicalSignal Landing Page Styles */

:root {
    --color-bg: #fafaf9;
    --color-bg-alt: #f5f5f4;
    --color-text: #1c1917;
    --color-text-muted: #78716c;
    --color-accent: #0d9488;
    --color-accent-subtle: #ccfbf1;
    --color-border: #e7e5e4;
    
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'IBM Plex Sans', system-ui, sans-serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
}

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

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

body {
    font-family: var(--font-body);
    font-weight: 300;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* Selection */
::selection {
    background: var(--color-accent-subtle);
    color: var(--color-text);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-sm) 0;
    background: rgba(250, 250, 249, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease;
}

nav.scrolled {
    border-bottom-color: var(--color-border);
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.nav-links {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.nav-contact {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    transition: all 0.2s ease;
}

.nav-contact:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--space-xl);
}

.hero-content {
    max-width: 800px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.4s;
}

.hero p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 540px;
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.6s;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid var(--color-text);
    transition: all 0.2s ease;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.hero-cta:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.hero-cta svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.hero-cta:hover svg {
    transform: translateX(4px);
}

/* Section */
section {
    padding: var(--space-xl) 0;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

/* Value Props */
.value-section {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

@media (max-width: 768px) {
    .value-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

.value-item {
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.value-item h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.value-item p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* Stats */
.stats-section {
    border-bottom: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-item {
    text-align: center;
    padding: var(--space-md) 0;
}

.stat-number {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* Partners */
.partners-section {
    text-align: center;
}

.partners-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
    opacity: 0.6;
}

.partner-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: -0.01em;
}

/* Contact */
.contact-section {
    background: var(--color-text);
    color: var(--color-bg);
    text-align: center;
}

.contact-section .section-label {
    color: var(--color-accent);
}

.contact-section .section-title {
    color: var(--color-bg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-email {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-bg);
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid rgba(255,255,255,0.3);
    transition: all 0.2s ease;
    margin-top: var(--space-md);
}

.contact-email:hover {
    border-bottom-color: var(--color-accent);
    color: var(--color-accent);
}

/* Footer */
footer {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-text {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Subtle grain overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.015;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Responsive */
@media (max-width: 640px) {
    footer .container {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .nav-links {
        gap: var(--space-xs);
    }
    
    .nav-contact {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }
}