/* Episte Website Styles - Dark Theme with Pink Accents */

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

:root {
    --pink-primary: #FF84A7;
    --pink-light: #FFA5C0;
    --pink-dark: #FF6B9D;
    --pink-glow: rgba(255, 132, 167, 0.3);
    --pink-gradient: linear-gradient(135deg, #FF84A7 0%, #FFA5C0 100%);
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: rgba(0, 0, 0, 0.1);
    --text-black: #000000;
    --text-dark: #1a1a1a;
    --text-gray: rgba(0, 0, 0, 0.7);
    --text-light-gray: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-black);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.main-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    gap: 2rem;
}

.header-content .logo {
    flex-shrink: 0;
}

.header-content .main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.header-content .desktop-lang-dropdown {
    flex-shrink: 0;
}

.header-content .mobile-lang-dropdown {
    display: none;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-black);
    text-decoration: none;
    z-index: 1001;
}

.logo img {
    height: 40px;
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger-menu span {
    width: 25px;
    height: 3px;
    background: var(--text-black);
    border-radius: 3px;
    transition: all 0.3s;
}

.hamburger-menu:active {
    transform: scale(0.95);
}

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

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

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-download-section {
    display: none;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-black);
    font-weight: 500;
    transition: all 0.3s;
    font-size: 0.95rem;
}

.main-nav a:hover {
    color: var(--pink-primary);
}

.download-btn-header {
    background: var(--pink-gradient);
    color: var(--bg-white) !important;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 15px var(--pink-glow);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.download-btn-header:hover {
    color: var(--bg-white) !important;
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--pink-glow);
}

.download-btn-header:active {
    color: var(--bg-white) !important;
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 2px 10px var(--pink-glow);
}

/* Language Dropdown */
.language-dropdown {
    position: relative;
}

.language-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.4rem 0.6rem;
    background: rgba(255, 132, 167, 0.08);
    border: 1.5px solid rgba(255, 132, 167, 0.2);
    border-radius: 50px;
    color: var(--text-black);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 50px;
}

.language-dropdown-toggle:hover {
    border-color: var(--pink-primary);
    background: rgba(255, 132, 167, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 132, 167, 0.2);
}

.language-dropdown-toggle:active {
    transform: translateY(0) scale(0.95);
}

.language-dropdown-toggle svg {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.6;
}

.language-dropdown.active .language-dropdown-toggle svg {
    transform: rotate(180deg);
    opacity: 1;
}

.language-dropdown.active .language-dropdown-toggle {
    border-color: var(--pink-primary);
    background: rgba(255, 132, 167, 0.15);
}

.current-lang-flag {
    font-size: 1.3rem;
    line-height: 1;
    display: inline-block;
}

.current-lang-flag .flag-icon,
.lang-flag .flag-icon {
    width: 1.3rem;
    height: 1.3rem;
    display: inline-block;
    vertical-align: middle;
    object-fit: contain;
}

.language-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--card-bg);
    border: 1.5px solid rgba(255, 132, 167, 0.2);
    border-radius: 16px;
    min-width: 60px;
    padding: 0.4rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

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

.lang-option {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 12px;
    margin-bottom: 0.3rem;
}

.lang-option:last-child {
    margin-bottom: 0;
}

.lang-option:hover {
    background: rgba(255, 132, 167, 0.12);
    transform: scale(1.1);
}

.lang-option.active {
    background: var(--pink-gradient);
    box-shadow: 0 2px 8px rgba(255, 132, 167, 0.3);
}

.lang-flag {
    font-size: 1.4rem;
    line-height: 1;
    display: inline-block;
    transition: transform 0.3s;
}

.lang-flag .flag-icon {
    width: 1.4rem;
    height: 1.4rem;
}

.lang-option:hover .lang-flag {
    transform: scale(1.15);
}

/* Hero Section */
.hero {
    background: var(--bg-white);
    color: var(--text-black);
    padding: 6rem 0 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 157, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
}

.hero h1 .pink-text {
    color: var(--pink-primary);
    margin-top: -0.3em;
    display: block;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--text-gray);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.hero-buttons a {
    display: inline-block;
    transition: all 0.3s;
}

.hero-buttons a:hover {
    transform: translateY(-3px);
    opacity: 0.9;
}

.hero-buttons img {
    height: 60px;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
}

.hero-buttons img[src*="_apple.svg"],
.hero-buttons img[src*="_google.svg"] {
    height: 60px !important;
    width: auto !important;
    max-width: none !important;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    background: var(--pink-gradient);
    color: var(--bg-white);
    text-decoration: none;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
    box-shadow: 0 4px 15px var(--pink-glow);
}

.btn-primary svg {
    flex-shrink: 0;
    display: block;
    margin: 0;
}

.btn-primary:hover {
    color: var(--bg-white);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--pink-glow);
}

.btn-primary:active {
    color: var(--bg-white);
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 2px 10px var(--pink-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    background: transparent;
    color: var(--pink-primary);
    text-decoration: none;
    border: 2px solid var(--pink-primary);
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.btn-secondary svg {
    flex-shrink: 0;
    display: block;
    margin: 0;
}

.btn-secondary:hover {
    border-color: var(--pink-primary);
    color: var(--pink-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(255, 132, 167, 0.2);
}

.btn-secondary:active {
    transform: scale(0.98);
    border-color: var(--pink-primary);
    color: var(--pink-primary);
}

.hero-image {
    margin-top: 4rem;
}

.hero-image img {
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(255, 107, 157, 0.3));
}

/* How It Works Section */
.how-it-works {
    padding: 6rem 0 0;
    background: var(--bg-white);
}

.how-it-works h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.how-it-works h2 .pink-text {
    color: var(--pink-primary);
    margin-top: -0.3em;
    display: block;
}

.how-it-works .section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
    position: relative;
}

.steps-grid::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--pink-gradient);
    opacity: 0.3;
    z-index: 0;
}

.step-item {
    text-align: center;
    padding: 2.5rem 2rem;
    position: relative;
    z-index: 1;
}

.step-item-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--pink-gradient);
    color: var(--text-black);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 20px var(--pink-glow);
}

.step-icon {
    margin: 1.5rem 0;
}

.step-icon img {
    width: 80px;
    height: 80px;
    filter: drop-shadow(0 0 20px var(--pink-glow));
}

.step-item h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-black);
    font-weight: 600;
}

.step-item p {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.6;
}

/* Technology Section */
.technology {
    padding: 6rem 0 0;
    background: var(--bg-white);
}

.technology h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.technology h2 .pink-text {
    color: var(--pink-primary);
    margin-top: -0.3em;
    display: block;
}

.technology .section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 4rem;
}

.technology-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.technology-list li {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    transition: all 0.3s;
    text-align: center;
    flex-direction: column;
}

.technology-list li:nth-child(1),
.technology-list li:nth-child(2),
.technology-list li:nth-child(3) {
    grid-column: span 2;
}

.technology-list li:nth-child(4) {
    grid-column: 1 / 4;
}

.technology-list li:nth-child(5) {
    grid-column: 4 / 7;
}

.technology-list li:hover {
    border-color: var(--pink-primary);
    box-shadow: 0 8px 30px rgba(255, 107, 157, 0.2);
    transform: translateY(-5px);
}

.technology-list li img {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    filter: drop-shadow(0 0 15px var(--pink-glow));
}

.technology-list li span {
    font-size: 1.1rem;
    color: var(--text-black);
    font-weight: 500;
    line-height: 1.6;
    text-align: center;
}

/* Features & Pricing Combined Section */
.features-pricing {
    padding: 6rem 0 0;
    background: var(--bg-white);
}

.features-pricing h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.features-pricing h2 .pink-text {
    color: var(--pink-primary);
    margin-top: -0.3em;
    display: block;
}

.features-pricing .section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
}

.pricing-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.pricing-tab {
    padding: 1rem 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-black);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.pricing-tab.active {
    background: var(--pink-gradient);
    border: 2px solid var(--pink-primary);
    box-shadow: 0 4px 15px var(--pink-glow);
    color: var(--bg-white);
}

.pricing-tab:hover:not(.active) {
    border-color: var(--pink-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(255, 132, 167, 0.2);
}

.pricing-tab:active {
    transform: scale(0.95);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features-grid .feature-tier {
    padding: 3rem 2rem;
    border-radius: 16px;
    transition: all 0.3s;
    position: relative;
    opacity: 0.5 !important;
    filter: grayscale(0.3) !important;
    transform: scale(1) !important;
    cursor: pointer;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.features-grid .feature-tier.basic {
    background: #FFCBE6;
}

.features-grid .feature-tier.plus {
    background: #F64594;
}

.features-grid .feature-tier.pro {
    background: #D80873;
}

.features-grid .feature-tier.active {
    opacity: 1 !important;
    filter: grayscale(0) !important;
    transform: scale(1.02) !important;
    border-color: var(--pink-primary);
    box-shadow: 0 10px 40px rgba(255, 107, 157, 0.2);
    background: var(--pink-gradient);
}

.features-grid .feature-tier.basic.active {
    background: #FFCBE6;
}

.features-grid .feature-tier.plus.active {
    background: #F64594;
}

.features-grid .feature-tier.pro.active {
    background: #D80873;
}



.features-grid .feature-tier.active:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: 0 15px 50px rgba(255, 107, 157, 0.25);
    border-color: var(--pink-primary);
}

.features-grid .feature-tier:not(.active):hover {
    opacity: 0.7 !important;
    filter: grayscale(0.2) !important;
}

.features-grid .feature-tier h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-black);
    text-align: left;
    font-weight: 700;
}

.features-grid .feature-tier.active h3 {
    color: var(--bg-white);
}

.features-grid .feature-tier .price {
    font-size: 1.5rem;
    color: var(--pink-primary);
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: left;
    line-height: 1.2;
}

.features-grid .feature-tier.active .price {
    color: var(--bg-white);
}

.features-grid .feature-tier .tier-description {
    font-size: 1rem;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    text-align: left;
}

.features-grid .feature-tier.active .tier-description {
    color: var(--bg-white);
}

.feature-list {
    list-style: none;
    margin-bottom: 2rem;
}

.feature-list li {
    padding: 0.75rem 0;
    color: var(--text-black);
    position: relative;
    padding-left: 2rem;
    font-size: 1rem;
    line-height: 1.6;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--pink-primary);
    font-weight: bold;
    font-size: 1.2rem;
}

.features-grid .feature-tier.active .feature-list li {
    color: var(--bg-white);
}

.features-grid .feature-tier.active .feature-list li::before {
    color: var(--bg-white);
}

.feature-btn {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: auto;
    padding: 1rem 2rem;
    background: var(--card-bg);
    color: var(--pink-primary);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid var(--pink-primary);
    opacity: 0.5;
    pointer-events: none;
}

.features-grid .feature-tier.basic.active .feature-btn,
.features-grid .feature-tier.pro.active .feature-btn,
.features-grid .feature-tier.plus.active .feature-btn {
    background: var(--bg-white);
    border: 2px solid var(--pink-primary);
    color: var(--pink-primary);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
}

.features-grid .feature-tier.active .feature-btn {
    opacity: 1;
    pointer-events: auto;
}

.feature-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(255, 107, 157, 0.3);
}

.feature-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 15px rgba(255, 107, 157, 0.2);
}

/* Scientific Communication Section */
.scientific-communication {
    padding: 6rem 0 0;
    background: var(--bg-white);
}

.scientific-communication h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.2;
}

.scientific-communication h2 .pink-text {
    color: var(--pink-primary);
    margin-top: -0.3em;
    display: block;
}

.scientific-communication .section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.scientific-communication .section-subtitle:empty {
    display: none;
}

.scientific-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    margin-top: 4rem;
}

.scientific-content-fr {
    gap: 1.05rem;
}

.scientific-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s;
}

.scientific-item:hover {
    border-color: var(--pink-primary);
    box-shadow: 0 8px 30px rgba(255, 132, 167, 0.15);
    transform: translateY(-5px);
}

.scientific-icon {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.scientific-item img {
    width: 120px;
    height: 120px;
    filter: drop-shadow(0 0 20px var(--pink-glow));
    transition: transform 0.3s;
}

.scientific-item:hover img {
    transform: scale(1.1);
}

.scientific-item h3 {
    font-size: 1.4rem;
    color: var(--text-black);
    font-weight: 600;
    margin-bottom: 1rem;
}

.scientific-item p {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin: 0;
    margin-top: 0.5rem;
    display: block;
}

/* Download Section */
.download {
    padding: 6rem 0 0;
    background: var(--bg-white);
    text-align: center;
}

.download-card {
    max-width: 500px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem 2.5rem;
}

.download-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.download-icon {
    width: 24px;
    height: 24px;
    color: var(--text-black);
    flex-shrink: 0;
}

.download-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-black);
    margin: 0;
    text-align: center;
}

.download-buttons {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    justify-content: center;
}

.download-buttons a {
    display: inline-block;
    transition: all 0.3s;
}

.download-buttons a:hover {
    transform: translateY(-3px);
    opacity: 0.9;
}

.download-buttons img {
    height: 60px;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
}

.download-buttons img[src*="_apple.svg"],
.download-buttons img[src*="_google.svg"] {
    height: 60px !important;
    width: auto !important;
    max-width: none !important;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.download-btn svg {
    flex-shrink: 0;
}

.download-btn.app-store {
    background: var(--pink-gradient);
    color: var(--bg-white);
    box-shadow: 0 4px 15px var(--pink-glow);
}

.download-btn.app-store:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--pink-glow);
}

.download-btn.app-store:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 2px 10px var(--pink-glow);
}

.download-btn.google-play {
    background: transparent;
    color: var(--pink-primary);
    border: 2px solid var(--pink-primary);
}

.download-btn.google-play:hover {
    border-color: var(--pink-primary);
    background: rgba(255, 107, 157, 0.1);
    color: var(--pink-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(255, 132, 167, 0.2);
}

.download-btn.google-play:active {
    transform: translateY(-1px) scale(0.98);
    border-color: var(--pink-primary);
    color: var(--pink-primary);
}

/* FAQ Styles */
.faq-header {
    padding: 4rem 0;
    text-align: center;
    background: var(--bg-white);
}

.faq-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.faq-header h1 .pink-text {
    color: var(--pink-primary);
}

.faq-header p {
    font-size: 1.3rem;
    color: var(--text-gray);
}

.faq-content {
    padding: 4rem 0;
    background: var(--bg-white);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover {
    border-color: var(--pink-primary);
    box-shadow: 0 4px 15px rgba(255, 132, 167, 0.1);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-black);
    transition: all 0.3s;
}

.faq-question:hover {
    color: var(--pink-primary);
}

.faq-question:active {
    transform: scale(0.98);
}

.faq-question span {
    flex: 1;
    padding-right: 1rem;
}

.faq-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--pink-primary);
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
    padding: 0 2rem;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
    padding: 0 2rem 1.5rem 2rem;
}

.faq-answer p {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 1rem;
    margin: 0;
}

/* Footer Styles */
.main-footer {
    background: var(--card-bg);
    color: var(--text-black);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-black);
    font-size: 1.2rem;
    font-weight: 600;
}

.footer-section p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: all 0.3s;
}

.footer-links a:hover {
    color: var(--pink-primary);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: flex-start;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--pink-gradient);
    border: none;
    border-radius: 50%;
    color: var(--bg-white);
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 15px var(--pink-glow);
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--pink-glow);
}

.social-btn:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 0 2px 10px var(--pink-glow);
}

.social-btn svg {
    width: 20px;
    height: 20px;
    display: block;
    margin: 0 auto;
    flex-shrink: 0;
}

.social-btn.google-play-btn svg {
    transform: translateX(1px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-light-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-header {
        padding: 1rem 0;
    }

    .hamburger-menu {
        display: flex;
    }

    .header-content .desktop-lang-dropdown {
        display: none;
    }

    .header-content .mobile-lang-dropdown {
        display: flex;
        flex-shrink: 0;
        order: 2;
        position: relative;
        z-index: 1002;
    }
    
    .header-content .logo {
        order: 1;
    }
    
    .header-content .hamburger-menu {
        order: 3;
    }


    .main-nav {
        position: fixed;
        top: -100%;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 70vh;
        background: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        align-items: flex-start;
        padding: 0 2rem 2rem 2rem;
        transition: top 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }

    .main-nav.active {
        top: 0;
        padding-top: calc(1rem + 60px + 1rem);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0.25rem;
        width: 100%;
        align-items: center;
        margin-bottom: 0.5rem;
    }

    .main-nav ul li {
        width: 100%;
        text-align: center;
    }

    .main-nav ul li a {
        display: block;
        width: 100%;
        padding: 0.25rem 0;
        text-align: center;
        font-size: 1.5rem;
        font-weight: normal;
    }

    .desktop-download-link {
        display: none;
    }

    .mobile-download-section {
        display: block;
        width: 100%;
        text-align: center;
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border-color);
    }

    .mobile-download-title {
        font-size: 1.5rem;
        font-weight: 600;
        color: var(--text-black);
        margin-bottom: 1rem;
        margin-top: 0;
    }

    .mobile-download-buttons {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 1.5rem;
    }

    .mobile-download-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 50px;
        height: 50px;
        min-width: 50px;
        min-height: 50px;
        max-width: 50px;
        max-height: 50px;
        padding: 0;
        border-radius: 50%;
        background: var(--pink-gradient);
        border: none;
        color: var(--bg-white);
        text-decoration: none;
        transition: all 0.3s;
        box-shadow: 0 4px 15px var(--pink-glow);
        flex-shrink: 0;
    }

    .mobile-download-btn svg {
        width: 20px;
        height: 20px;
        display: block;
        margin: 0 auto;
        flex-shrink: 0;
    }

    .mobile-download-btn.google-play-btn svg {
        transform: translateX(1px);
    }

    .mobile-download-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 25px var(--pink-glow);
    }

    .mobile-download-btn:active {
        transform: translateY(-1px) scale(0.98);
        box-shadow: 0 2px 10px var(--pink-glow);
    }

    .header-content .mobile-lang-dropdown .language-dropdown {
        width: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .header-content .mobile-lang-dropdown .language-dropdown-toggle {
        width: auto;
        max-width: none;
        justify-content: center;
        margin: 0 auto;
    }

    .header-content .mobile-lang-dropdown .language-dropdown-menu {
        position: absolute;
        top: calc(100% + 0.5rem);
        right: 0;
        width: auto;
        min-width: 60px;
        max-width: 80px;
        margin: 0;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px) scale(0.95);
        display: block;
    }

    .header-content .mobile-lang-dropdown.active .language-dropdown-menu {
        opacity: 1 !important;
        visibility: visible !important;
        transform: translateY(0) scale(1);
        display: block !important;
    }

    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.7);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s;
        z-index: 999;
        pointer-events: none;
        backdrop-filter: blur(4px);
    }

    .mobile-overlay.active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .section-subtitle {
        font-size: 1.3rem;
    }

    .tier-description {
        font-size: 1.3rem;
    }

    .feature-list li {
        font-size: 1.3rem;
    }

    .footer-section p {
        font-size: 1.3rem;
    }

    .technology-list li span {
        font-size: 1.3rem;
    }

    .faq-answer p {
        font-size: 1.3rem;
    }

    .how-it-works h2,
    .technology h2,
    .features-pricing h2,
    .scientific-communication h2,
    .download h2 {
        font-size: 2rem;
    }

    .steps-grid,
    .features-grid,
    .scientific-content {
        grid-template-columns: 1fr;
    }
    
    .scientific-content-fr {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.525rem;
    }
    
    .technology-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .technology-list li:nth-child(1),
    .technology-list li:nth-child(2),
    .technology-list li:nth-child(3),
    .technology-list li:nth-child(4) {
        grid-column: auto;
    }

    .technology-list li:nth-child(5) {
        grid-column: 1 / -1;
        max-width: 50%;
        margin: 0 auto;
    }

    .technology-list li:nth-child(6) {
        grid-column: 1 / -1;
    }
    
    .scientific-item {
        padding: 2rem 1.5rem;
    }
    
    .scientific-item img {
        width: 100px;
        height: 100px;
    }
    
    .scientific-item h3 {
        font-size: 1.2rem;
    }
    
    .scientific-item p {
        font-size: 1.3rem;
    }

    .steps-grid::before {
        display: none;
    }

    .step-item {
        display: flex;
        flex-direction: column;
        text-align: center;
        padding: 1.5rem;
        align-items: center;
    }

    .step-item-header {
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        margin-bottom: 1rem;
        text-align: center;
    }

    .step-number {
        margin-bottom: 0;
        flex-shrink: 0;
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }

    .step-icon {
        margin: 0;
        flex-shrink: 0;
    }

    .step-icon img {
        width: 60px;
        height: 60px;
    }

    .step-item h3 {
        margin-bottom: 0.5rem;
        font-size: 1.43rem;
        margin-top: 0;
        text-align: center;
    }

    .step-item p {
        margin-top: 0;
        text-align: center;
        font-size: 1.3rem;
    }

    .download-card {
        border: none;
        background: transparent;
        padding: 2rem 1rem;
    }

    .download-buttons {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 1.5rem;
    }
    
    .download-header {
        justify-content: center;
    }

    .download-icon {
        display: none;
    }

    .download-btn {
        width: 50px;
        height: 50px;
        min-width: 50px;
        min-height: 50px;
        max-width: 50px;
        max-height: 50px;
        padding: 0;
        border-radius: 50%;
        background: var(--pink-gradient);
        border: none;
        color: var(--bg-white);
        box-shadow: 0 4px 15px var(--pink-glow);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

    .download-btn svg {
        display: block;
        width: 20px;
        height: 20px;
        margin: 0;
    }

    .download-btn .download-btn-text {
        display: none;
    }

    .download-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 25px var(--pink-glow);
    }

    .download-btn:active {
        transform: translateY(-1px) scale(0.98);
        box-shadow: 0 2px 10px var(--pink-glow);
    }

    .download-btn.google-play {
        background: var(--pink-gradient);
        border: none;
        color: var(--bg-white);
    }

    .download-btn img {
        height: 50px;
        width: auto;
        max-width: 100%;
        display: block;
        object-fit: contain;
    }
    
    .download-buttons img {
        height: 50px;
        width: auto;
        max-width: 100%;
        display: block;
        object-fit: contain;
    }
    
    .download-buttons img[src*="_apple.svg"],
    .download-buttons img[src*="_google.svg"] {
        height: 50px !important;
        width: auto !important;
        max-width: none !important;
    }
    
    .hero-buttons img {
        height: 50px;
        width: auto;
        max-width: 100%;
        display: block;
        object-fit: contain;
    }
    
    .hero-buttons img[src*="_apple.svg"],
    .hero-buttons img[src*="_google.svg"] {
        height: 50px !important;
        width: auto !important;
        max-width: none !important;
    }

    .hero-buttons {
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 1rem;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .footer-section {
        text-align: center;
    }

    .footer-section h3 {
        text-align: center;
    }

    .footer-section p {
        text-align: center;
    }

    .footer-links {
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}