/* ============================================
   Bio-Tech — Medical Clean Stylesheet
   ============================================ */

/* --- CSS Variables --- */
:root {
    --color-primary: #0A4D8C;
    --color-primary-light: #1a6fc4;
    --color-primary-dark: #073a6b;
    --color-accent: #0A4D8C;
    --color-text: #1a1a2e;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-bg: #ffffff;
    --color-bg-alt: #f7fafc;
    --color-bg-section: #edf2f7;
    --color-border: #e2e8f0;
    --color-border-light: #f0f4f8;
    --color-success: #38a169;
    --color-gradient-start: #0A4D8C;
    --color-gradient-end: #1a6fc4;
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1100px;
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .logo {
        animation: none;
    }

    .scroll-indicator {
        animation: none;
    }
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

a:hover {
    color: var(--color-primary-light);
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Language Switcher --- */
.lang-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 6px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-body);
    letter-spacing: 0.5px;
    transition: var(--transition);
}

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

.lang-btn.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 50%, #e2e8f0 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(10, 77, 140, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(26, 111, 196, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(10, 77, 140, 0.03) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 40px 24px;
}

.logo-container {
    margin-bottom: 40px;
}

.logo {
    width: 100px;
    height: 100px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--color-text-secondary);
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: var(--color-primary);
    color: #ffffff;
    padding: 16px 40px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.02em;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(10, 77, 140, 0.3);
}

.cta-button:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(10, 77, 140, 0.35);
    color: #ffffff;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-muted);
    animation: bounce 2s infinite;
}

.scroll-indicator svg {
    width: 24px;
    height: 24px;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-8px);
    }

    60% {
        transform: translateX(-50%) translateY(-4px);
    }
}

/* --- Section Titles --- */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 700;
    color: var(--color-primary-dark);
    text-align: center;
    margin-bottom: 50px;
    letter-spacing: -0.01em;
}

/* --- Product Section --- */
.product {
    padding: 100px 0;
    background: var(--color-bg);
}

.product-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-visual {
    display: flex;
    justify-content: center;
}

.blue-gradient {
    width: 280px;
    height: 320px;
    background: linear-gradient(180deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.blue-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.15) 0%, transparent 60%);
}

.drop-icon {
    width: 120px;
    height: 150px;
    position: relative;
    z-index: 1;
}

.product-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 16px;
}

.product-text p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.product-features {
    list-style: none;
    padding: 0;
}

.product-features li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: var(--color-text);
    font-weight: 500;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* --- Science Section --- */
.science {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.science-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.science-card {
    background: var(--color-bg);
    padding: 40px 30px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border-light);
}

.science-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.science-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--color-primary);
}

.science-icon svg {
    width: 100%;
    height: 100%;
}

.science-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}

.science-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* --- Pipeline Section --- */
.pipeline {
    padding: 100px 0;
    background: var(--color-bg);
}

.pipeline-intro {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.pipeline-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.pipeline-item {
    background: var(--color-bg-alt);
    padding: 40px 30px;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.pipeline-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.pipeline-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-primary);
}

.pipeline-icon svg {
    width: 100%;
    height: 100%;
}

.pipeline-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

.pipeline-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.pipeline-status {
    display: inline-block;
    background: var(--color-primary);
    color: #ffffff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

/* --- Quiz Section --- */
.quiz {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.quiz-intro {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.quiz-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--color-bg);
    padding: 50px 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}

.quiz-question {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 24px;
    text-align: center;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-option {
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-body);
    color: var(--color-text);
    transition: var(--transition);
    text-align: left;
}

.quiz-option:hover {
    border-color: var(--color-primary);
    background: rgba(10, 77, 140, 0.05);
}

.quiz-option:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.quiz-option:active {
    transform: scale(0.98);
}

.quiz-result {
    text-align: center;
}

.result-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    color: var(--color-success);
}

.result-icon svg {
    width: 100%;
    height: 100%;
}

.quiz-result h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
}

.quiz-result p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.quiz-cta {
    display: inline-block;
}

/* --- Contact Section --- */
.contact {
    padding: 100px 0;
    background: var(--color-bg);
}

.contact-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 50px;
    font-size: 1.05rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-form {
    max-width: 500px;
    margin: 0 auto;
    background: var(--color-bg-alt);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10, 77, 140, 0.1);
}

.form-group input::placeholder {
    color: var(--color-text-muted);
}

.submit-button {
    width: 100%;
    background: var(--color-primary);
    color: #ffffff;
    padding: 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.submit-button:hover {
    background: var(--color-primary-light);
}

.submit-button:disabled {
    background: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

.submit-button:focus-visible {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: 2px;
}

.form-success {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
    padding: 60px 40px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.form-success svg {
    width: 64px;
    height: 64px;
    color: var(--color-success);
    margin-bottom: 20px;
}

.form-success h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

.form-success p {
    color: var(--color-text-secondary);
}

/* --- Knowledge Base Section --- */
.knowledge {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.knowledge-intro {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 50px;
    font-size: 1.05rem;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.knowledge-card {
    background: var(--color-bg);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.knowledge-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.knowledge-tag {
    display: inline-block;
    background: rgba(10, 77, 140, 0.1);
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.knowledge-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.4;
}

.knowledge-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.knowledge-coming {
    display: inline-block;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    font-style: italic;
}

/* --- Footer --- */
.footer {
    padding: 60px 0 30px;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    width: 40px;
    height: 40px;
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.footer-contacts h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

.footer-contacts p {
    color: var(--color-text-secondary);
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .product-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .product-visual {
        order: -1;
    }

    .product-features {
        display: inline-block;
        text-align: left;
    }

    .science-grid,
    .pipeline-list,
    .knowledge-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .lang-switcher {
        top: 10px;
        right: 10px;
    }

    .lang-btn {
        padding: 6px 10px;
        font-size: 0.75rem;
    }

    .hero {
        min-height: 90vh;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 30px;
    }

    .product,
    .science,
    .pipeline,
    .quiz,
    .contact,
    .knowledge {
        padding: 60px 0;
    }

    .science-grid,
    .pipeline-list,
    .knowledge-grid {
        grid-template-columns: 1fr;
    }

    .quiz-container {
        padding: 30px 20px;
    }

    .contact-form {
        padding: 30px 20px;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-brand {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .cta-button {
        padding: 14px 30px;
        font-size: 0.9rem;
    }

    .blue-gradient {
        width: 220px;
        height: 260px;
    }

    .drop-icon {
        width: 90px;
        height: 110px;
    }
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}

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

/* --- Print Styles --- */
@media print {

    .lang-switcher,
    .scroll-indicator,
    .cta-button,
    .quiz-container,
    .contact-form,
    .submit-button {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }

    .hero {
        min-height: auto;
        padding: 20px 0;
    }
}