/* ===================================
   LYG INC Website Styles
   ================================== */

@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@500&display=swap&text=%E4%B8%AD%E6%96%87%E6%97%A5%E6%9C%AC%E8%AA%9E");

/* ===== Language Picker ===== */
#google_translate_element {
    display: none !important;
}

/* Hide Google banner bar */
.goog-te-banner-frame,
.skiptranslate > iframe,
.goog-te-balloon-frame {
    display: none !important;
}

body {
    top: 0 !important;
}

.lang-picker {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: none;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    padding: 0.35rem 0.65rem;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--gray-600);
    transition: border-color 0.2s, color 0.2s;
    white-space: nowrap;
}

.lang-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lang-btn svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.lang-chevron {
    width: 10px;
    height: 10px;
    opacity: 0.5;
    transition: transform 0.2s;
}

.lang-menu.open + .lang-btn .lang-chevron,
.lang-btn[aria-expanded="true"] .lang-chevron {
    transform: rotate(180deg);
}

.lang-menu {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    min-width: 140px;
    z-index: 9999;
    padding: 0.4rem 0;
    list-style: none;
    margin: 0;
}

.lang-menu.open {
    display: block;
}

.lang-menu li {
    padding: 0.45rem 1rem;
    font-size: 0.84rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", "Noto Sans CJK JP", "Noto Sans SC", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Microsoft YaHei", "PingFang SC", sans-serif;
}

.lang-menu li:hover,
.lang-menu li.active {
    background: var(--gray-50);
    color: var(--primary-color);
}



/* ===== CSS Variables ===== */
:root {
    --primary-color: #e11d48;
    --primary-dark: #be123c;
    --secondary-color: #9333ea;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --danger-color: #dc2626;
    --dark: #1e293b;
    --light: #f8fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ===== Navigation ===== */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
    filter: brightness(1.1);
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    line-height: 0;
}

.logo-text {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #000000;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    line-height: 1;
    padding-top: 0.2rem;
}

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

.nav-menu a {
    color: var(--gray-600);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.btn-login {
    background-color: var(--primary-color);
    color: var(--white) !important;
    padding: 0.625rem 1.5rem !important;
    border-radius: var(--radius);
    font-weight: 600;
}

.btn-login::after {
    display: none;
}

.btn-login:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-800);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

.btn-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-block;
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, #e11d48 0%, #9333ea 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

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

.platform-badges {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
}

/* ===== Sections ===== */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--gray-900);
}

/* ===== Features Overview ===== */
.features-overview {
    background-color: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== Platform Section ===== */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.platform-item {
    text-align: center;
    padding: 2rem;
}

.platform-item h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.platform-item p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #e11d48 0%, #9333ea 100%);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-300);
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-column h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.footer-column p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
}

/* ===== Page Hero ===== */
.page-hero {
    background: linear-gradient(135deg, #e11d48 0%, #9333ea 100%);
    color: var(--white);
    text-align: center;
    padding: 4rem 0;
}

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

.page-hero p {
    font-size: 1.25rem;
    opacity: 0.95;
}

/* ===== Content Sections ===== */
.content-section {
    padding: 5rem 0;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: center;
}

.content-text h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.content-text p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.content-image, .placeholder-image {
    background-color: var(--gray-200);
    border-radius: var(--radius-lg);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    font-weight: 600;
}

.about-image-container {
    background: var(--gray-200);
    border-radius: var(--radius-lg);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem;
}

.about-image-container .logo-text {
    font-size: 6rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: #000000;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.about-logo {
    max-width: 400px;
    width: 80%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0,0,0,0.15));
}

/* ===== Mission Section ===== */
.mission-section {
    background-color: var(--gray-50);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.mission-card {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.mission-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.mission-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== Services Section ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-item {
    padding: 2rem;
    border-left: 4px solid var(--accent-color);
    background-color: var(--gray-50);
    border-radius: var(--radius);
}

.service-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.service-item p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== Stats Section ===== */
.stats-section {
    background: linear-gradient(135deg, #e11d48 0%, #ec4899 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ===== Feature Detail ===== */
.feature-detail {
    padding: 4rem 0;
}

.feature-detail.alt {
    background-color: var(--gray-50);
}

.feature-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    align-items: center;
}

.feature-text h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.feature-text p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.75rem 0;
    color: var(--gray-700);
    line-height: 1.6;
}

.feature-list li::before {
    content: '✓ ';
    color: var(--success-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

.feature-visual {
    background-color: var(--gray-200);
    border-radius: var(--radius-lg);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    font-weight: 600;
    font-size: 1.125rem;
}

/* ===== Additional Features ===== */
.additional-features {
    background-color: var(--gray-50);
}

/* ===== Login Section ===== */
.login-section {
    padding: 5rem 0;
    background-color: var(--gray-50);
    min-height: calc(100vh - 200px);
}

.login-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.login-box {
    background-color: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.login-box h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.login-subtitle {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

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

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

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input {
    cursor: pointer;
}

.forgot-link {
    color: var(--primary-color);
    font-weight: 600;
}

.forgot-link:hover {
    text-decoration: underline;
}

.divider {
    text-align: center;
    position: relative;
    margin: 1.5rem 0;
}

.divider span {
    background-color: var(--white);
    padding: 0 1rem;
    color: var(--gray-500);
    position: relative;
    z-index: 1;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--gray-300);
}

.social-login {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-social {
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    background-color: var(--white);
    color: var(--gray-700);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-social:hover {
    background-color: var(--gray-50);
    border-color: var(--gray-400);
}

.signup-link {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--gray-600);
}

.signup-link a {
    color: var(--primary-color);
    font-weight: 600;
}

.signup-link a:hover {
    text-decoration: underline;
}

.login-info {
    background: linear-gradient(135deg, #e11d48 0%, #9333ea 100%);
    color: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-info h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

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

.info-list li {
    padding: 0.75rem 0;
    font-size: 1.05rem;
}

.platform-info {
    margin-top: auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.platform-info p {
    margin-bottom: 0.5rem;
}

/* ===== Pricing Section ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.popular-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: linear-gradient(135deg, #e11d48 0%, #ec4899 100%);
    color: var(--white);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.plan-name {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.plan-price {
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    color: var(--gray-600);
    font-size: 1rem;
}

.plan-description {
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.6;
}

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

.plan-features li {
    padding: 0.75rem 0;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-200);
}

.plan-features li:last-child {
    border-bottom: none;
}

/* ===== Comparison Table ===== */
.comparison-section {
    background-color: var(--gray-50);
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-table thead {
    background-color: var(--primary-color);
    color: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: center;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
}

.comparison-table tbody tr:nth-child(even) {
    background-color: var(--gray-50);
}

.comparison-table tbody tr:hover {
    background-color: var(--gray-100);
}

/* ===== FAQ Section ===== */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.faq-item p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===== Contact Section ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.contact-form-container {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form-container h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--gray-900);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.contact-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.contact-item p {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.contact-item a {
    color: var(--primary-color);
    font-weight: 600;
}

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

/* ===== Map Section ===== */
.map-section {
    padding: 0;
}

.map-container {
    padding: 2rem 0;
}

.map-container iframe {
    width: 100%;
    height: 450px;
    border: 0;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.map-placeholder {
    background-color: var(--gray-200);
    padding: 5rem 2rem;
    text-align: center;
    color: var(--gray-600);
}

.map-placeholder p {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .section-title {
        font-size: 2rem;
    }

    .page-hero h1 {
        font-size: 2.25rem;
    }

    .features-grid,
    .platform-grid,
    .mission-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .login-container {
        grid-template-columns: 1fr;
    }

    .login-box,
    .contact-form-container {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero {
        padding: 4rem 0;
    }

    section {
        padding: 3rem 0;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

/* ===== Button Spinner ===== */
.btn-spinner {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.btn-spinner .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: btn-spin 0.7s linear infinite;
    flex-shrink: 0;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}