/* ===================================
   CRUX Landing Page Styles
   Clean, modern medical-tech aesthetic
   =================================== */

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Medical Tech Theme */
    --primary-blue: #0066cc;
    --primary-teal: #00a896;
    --dark-blue: #003d7a;
    --light-blue: #e6f2ff;
    --accent-teal: #02c39a;
    
    /* Neutrals */
    --white: #ffffff;
    --off-white: #f8fafc;
    --light-gray: #e2e8f0;
    --gray: #64748b;
    --dark-gray: #334155;
    --black: #0f172a;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Inter', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 24px;
    
    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--black);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--black);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--dark-gray);
}

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

/* === NAVIGATION === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--gray);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark-gray);
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link.cta-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    color: var(--white);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
}

.nav-link.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--black);
    border-radius: 2px;
    transition: var(--transition);
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

.btn-full {
    width: 100%;
}

/* === HERO SECTION === */
.hero {
    background: linear-gradient(180deg, var(--light-blue) 0%, var(--white) 100%);
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
}

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

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-top: 0.5rem;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.insole-showcase {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.insole-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 168, 150, 0.2), transparent);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse-glow 3s infinite;
}

.insole-image {
    position: relative;
    z-index: 1;
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 102, 204, 0.2));
    animation: float 6s ease-in-out infinite;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

/* === ANIMATIONS === */
@keyframes pulse-glow {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.8; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-delay {
    animation: fadeIn 1s ease-out 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s both;
}

.fade-in-delay-3 {
    animation: fadeIn 1s ease-out 0.9s both;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === SECTION HEADERS === */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--primary-teal);
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

/* === PROBLEM SECTION === */
.problem {
    padding: var(--section-padding);
    background: var(--white);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.problem-card {
    background: var(--off-white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--light-gray);
}

.problem-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-blue);
}

.problem-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--primary-blue);
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--black);
}

.problem-card p {
    font-size: 1rem;
    color: var(--dark-gray);
}

/* === SOLUTION SECTION === */
.solution {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--white) 0%, var(--light-blue) 100%);
}

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

.solution-visual {
    position: relative;
}

.insole-diagram {
    position: relative;
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
}

.diagram-image {
    width: 100%;
    height: auto;
}

.sensor-point {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.pulse {
    width: 16px;
    height: 16px;
    background: var(--primary-teal);
    border-radius: 50%;
    position: relative;
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 rgba(0, 168, 150, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(0, 168, 150, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 168, 150, 0); }
}

.sensor-label {
    background: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dark-blue);
    box-shadow: var(--shadow-md);
    white-space: nowrap;
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature {
    display: flex;
    gap: 1.5rem;
}

.feature-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.feature p {
    font-size: 1rem;
    color: var(--dark-gray);
}

/* === HOW IT WORKS === */
.how-it-works {
    padding: var(--section-padding);
    background: var(--white);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
    align-items: center;
}

.step {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--off-white);
    border-radius: var(--border-radius);
    border: 2px solid var(--light-gray);
    transition: var(--transition);
    position: relative;
}

.step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-teal);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.step-icon {
    color: var(--primary-blue);
    margin: 1rem auto;
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.step p {
    font-size: 0.9rem;
    color: var(--gray);
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-teal);
    text-align: center;
    font-weight: 700;
}

/* === FOR CLINICS === */
.for-clinics {
    padding: var(--section-padding);
    background: var(--dark-blue);
    color: var(--white);
}

.for-clinics .section-label {
    color: var(--accent-teal);
}

.for-clinics .section-title,
.for-clinics h4 {
    color: var(--white);
}

.for-clinics p {
    color: rgba(255, 255, 255, 0.85);
}

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

.clinics-intro {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.benefit {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.benefit-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.benefit h4 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.benefit p {
    font-size: 0.95rem;
}

.testimonial {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-teal);
    position: relative;
}

.testimonial-quote {
    font-size: 4rem;
    line-height: 1;
    color: var(--accent-teal);
    position: absolute;
    top: 10px;
    left: 20px;
    opacity: 0.5;
}

.testimonial-text {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.testimonial-author strong {
    font-size: 1rem;
}

.testimonial-author span {
    font-size: 0.9rem;
    opacity: 0.8;
}

.dashboard-mockup {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.mockup-header {
    background: var(--light-gray);
    padding: 1rem;
    display: flex;
    gap: 0.5rem;
}

.mockup-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray);
}

.mockup-content {
    padding: 2rem;
}

.mockup-chart {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    height: 150px;
    margin-bottom: 2rem;
}

.chart-bar {
    flex: 1;
    background: linear-gradient(180deg, var(--primary-teal), var(--primary-blue));
    border-radius: 4px 4px 0 0;
    animation: grow 1s ease-out;
}

@keyframes grow {
    from { height: 0; }
}

.mockup-alerts {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.alert-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--warning);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--info);
}

.alert-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* === ABOUT SECTION === */
.about {
    padding: var(--section-padding);
    background: var(--off-white);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.about-paragraph {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.value-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-teal);
    box-shadow: var(--shadow-sm);
}

.value-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.value-card p {
    font-size: 0.95rem;
    color: var(--gray);
}

/* === CONTACT SECTION === */
.contact {
    padding: var(--section-padding);
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-description {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-method {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.method-icon {
    font-size: 2rem;
}

.contact-method h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-method a {
    color: var(--primary-blue);
    font-weight: 500;
}

.contact-method a:hover {
    text-decoration: underline;
}

.contact-form-wrapper {
    background: var(--off-white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

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

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

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

.form-group input,
.form-group textarea {
    padding: 0.9rem 1.2rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--gray);
    margin-top: -0.5rem;
}

/* === FOOTER === */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2.5fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-tagline {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-teal);
}

.footer-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-column h4 {
    font-size: 1rem;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.footer-column a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--accent-teal);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-content,
    .solution-content,
    .clinics-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        align-items: flex-start;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .section-padding {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .container {
        padding: 0 16px;
    }
    
    .btn {
        padding: 0.85rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
}

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-gradient { 
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }

/* === PLACEHOLDER IMAGES === */
/* Fallback styles for when actual images aren't available */
.insole-image,
.diagram-image {
    background: linear-gradient(135deg, var(--light-blue), var(--off-white));
    border-radius: var(--border-radius);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.insole-image::before,
.diagram-image::before {
    content: '🩺 Smart Insole';
    font-size: 2rem;
    color: var(--gray);
}