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

:root {
    --max-width: 1400px;
    --header-height: 80px;
    --section-padding: 4rem;
    --card-padding: 2rem;
    --nav-bg: #fff;
    --nav-text: #1a1a1a;
    --nav-hover: #0099FF;
    --primary-color: #0099FF;
    --primary-light: #33ADFF;
    --primary-dark: #0077CC;
    --secondary-color: #FF6600;
    --secondary-light: #FF8533;
    --secondary-dark: #CC5200;
    --background-white: #fff;
    --background-light: #F5F9FF;
    --text-primary: #1a1a1a;
    --text-secondary: #4D4D4D;
    --text-light: #808080;
    --success-color: #00CC66;
    --error-color: #FF3333;
    --warning-color: #FFCC00;
    --border-color: #E6E6E6;
    --shadow-color: rgba(0, 153, 255, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-light);
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    height: var(--header-height);
    box-sizing: border-box;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.nav-link:hover {
    color: var(--secondary-color);
    background-color: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: var(--header-height);
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: var(--max-width);
    width: 100%;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
    max-width: 100%;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    margin-bottom: 3rem;
    opacity: 0.9;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    max-width: 100%;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    white-space: nowrap;
    min-width: fit-content;
}

.feature:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.feature i {
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.feature span {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Tariffs Section */
.tariffs-section {
    padding: var(--section-padding) 0;
    background: var(--background-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    max-width: 100%;
    word-wrap: break-word;
}

.tariffs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.tariff-card {
    background: var(--background-white);
    border-radius: 20px;
    padding: var(--card-padding);
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: all 0.3s ease;
    position: relative;
    border: 2px solid transparent;
    max-width: 100%;
    overflow: hidden;
}

.tariff-card.featured {
    border-color: var(--secondary-color);
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 102, 0, 0.2);
}

.tariff-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.tariff-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
    box-shadow: 0 25px 50px rgba(255, 102, 0, 0.3);
}

.tariff-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 1;
}

.tariff-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tariff-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tariff-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.tariff-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tariff-features i {
    color: var(--success-color);
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.tariff-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tariff-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Device Info Section */
.device-info-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--background-light) 0%, var(--border-color) 100%);
}

.device-info-card {
    background: var(--background-white);
    border-radius: 20px;
    padding: var(--card-padding);
    box-shadow: 0 10px 25px var(--shadow-color);
    max-width: 500px;
    margin: 0 auto;
}

.device-info-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.device-info-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.device-info-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.device-info-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--background-light);
    border-radius: 10px;
}

.info-item .label {
    font-weight: 600;
    color: var(--text-secondary);
}

.info-item .value {
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.info-item .value.active {
    background: var(--success-color);
    color: white;
}

.info-item .value.expired {
    background: var(--error-color);
    color: white;
}

.info-item .value.inactive {
    background: var(--text-light);
    color: white;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin: 0 0 1rem 0;
    color: var(--secondary-color);
}

.footer-section p {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.footer-link {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    opacity: 0.7;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--background-white);
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: modalSlideIn 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.modal-body {
    padding: 1.5rem;
}

.close {
    color: var(--text-light);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--primary-color);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

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

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.modal-actions button {
    flex: 1;
    padding: 0.8rem 1rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.test-btn:hover {
    background: #00AA55;
    transform: translateY(-2px);
}

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

.save-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

.cancel-btn:hover {
    background: #CC0000;
    transform: translateY(-2px);
}

/* Settings Button */
.settings-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: all 0.3s ease;
    z-index: 100;
}

.settings-btn:hover {
    transform: translateY(-5px) rotate(90deg);
    box-shadow: 0 15px 40px var(--shadow-color);
}

/* Purchase Modal Styles */
.purchase-info {
    max-width: 600px;
    margin: 0 auto;
}

.tariff-summary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    text-align: center;
}

.tariff-summary h3 {
    margin: 0 0 1rem 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.price-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
}

.price-display .price {
    font-size: 2.5rem;
    font-weight: 700;
}

.price-display .currency {
    font-size: 1.2rem;
    opacity: 0.9;
}

.features-list {
    background: var(--background-light);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
}

.features-list h4 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

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

.features-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.features-list li i {
    color: var(--success-color);
    font-size: 0.9rem;
}

.purchase-form {
    background: var(--background-white);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.purchase-form h4 {
    margin: 0 0 1.5rem 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #4a5568;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

/* Notification Styles */
#notificationContainer {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1001;
    max-width: 400px;
}

.notification {
    background: var(--background-white);
    border-radius: 10px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 10px 30px var(--shadow-color);
    border-left: 4px solid var(--primary-color);
    animation: notificationSlideIn 0.3s ease;
    max-width: 350px;
}

.notification.success {
    border-left-color: var(--success-color);
}

.notification.error {
    border-left-color: var(--error-color);
}

.notification.info {
    border-left-color: var(--primary-color);
}

@keyframes notificationSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */

/* Large Desktop (1440px and up) */
@media (min-width: 1440px) {
    html {
        zoom: 0.9;
    }
    body {
        transform: scale(0.9);
        transform-origin: top center;
        width: 111.111%;
    }
    .container {
        max-width: 1400px;
    }
    
    #notificationContainer {
        top: 2.5rem;
        right: 2.5rem;
        max-width: 400px;
    }
    
    .modal-content {
        max-width: 600px;
        margin: 3% auto;
    }
    
    .price {
        font-size: 2.5rem;
    }
    
    .tariff-header h3 {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 4.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
        max-width: 1000px;
    }
    
    .tariffs-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 3rem;
    }
    
    .tariff-card {
        padding: 3rem;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2.5rem;
    }
}

/* Desktop (1024px - 1439px) */
@media (min-width: 1024px) and (max-width: 1439px) {
    html {
        zoom: 0.75;
    }
    .container {
        max-width: 1200px;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
        max-width: 900px;
    }
    
    .tariffs-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .price {
        font-size: 2.2rem;
    }
    
    .tariff-header h3 {
        font-size: 1.6rem;
    }
}

/* Tablet Landscape (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    html {
        zoom: 0.6;
    }
    .container {
        max-width: 98vw;
        padding: 0 10px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
        max-width: 800px;
    }
    
    .hero-features {
        gap: 1.5rem;
    }
    
    .tariffs-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    .tariff-card{
        grid-column: span 1;
        max-width: 500px;
        margin: 0 auto;
    }
    .tariff-card.featured {
        grid-column: span 1;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .feature-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .price {
        font-size: 2rem;
    }
    
    .tariff-header h3 {
        font-size: 1.5rem;
    }
}

/* Tablet Portrait (481px - 767px) */
@media (min-width: 481px) and (max-width: 767px) {
    .container {
        padding: 0 25px;
    }
    
    #notificationContainer {
        top: 1.5rem;
        right: 1.5rem;
        max-width: 80vw;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
        max-width: 450px;
    }
    
    .price {
        font-size: 1.8rem;
    }
    
    .tariff-header h3 {
        font-size: 1.4rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .hero-section {
        min-height: 100vh;
        padding: 2rem 0;
        margin-top: 120px;
    }

    .hero-content {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: clamp(2.5rem, 6vw, 3rem);
        margin-bottom: 1.5rem;
    }

    .hero-subtitle {
        font-size: clamp(1rem, 3vw, 1.2rem);
        margin-bottom: 2.5rem;
        padding: 0 1rem;
    }

    .hero-features {
        gap: 1.5rem;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .feature {
        min-width: 200px;
        justify-content: center;
        padding: 1rem 1.5rem;
        white-space: normal;
    }

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

    .tariffs-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tariff-card {
        padding: 2rem;
    }

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

    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .feature-category {
        padding: 2rem;
    }
}

/* Mobile (320px - 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    #notificationContainer {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        max-width: none;
    }
    
    .notification {
        max-width: none;
        margin-bottom: 0.5rem;
    }
    
    .modal-content {
        margin: 5% auto;
        width: 95%;
        max-width: none;
        border-radius: 10px;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .price {
        font-size: 1.5rem;
    }
    
    .tariff-header h3 {
        font-size: 1.3rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .nav-link {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }

    .hero-section {
        margin-top: 100px;
        padding: 1rem 0;
        min-height: 90vh;
    }

    .hero-title {
        font-size: clamp(1.8rem, 8vw, 2.5rem);
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: clamp(0.9rem, 4vw, 1.1rem);
        padding: 0 0.5rem;
        margin-bottom: 2rem;
    }

    .hero-features {
        gap: 1rem;
        flex-direction: column;
        align-items: center;
    }

    .feature {
        width: 100%;
        max-width: 280px;
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
        white-space: normal;
    }

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

    .tariff-card {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
    
    .tariff-card.featured {
        transform: none;
    }
    
    .tariff-card.featured:hover {
        transform: translateY(-5px);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-category {
        padding: 1.5rem;
    }
    
    .feature-item {
        padding: 1rem;
    }
    
    .feature-item h4 {
        font-size: 1rem;
    }
    
    .feature-item p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-section {
        margin-top: 100px;
        padding: 0.5rem 0;
    }

    .hero-title {
        font-size: clamp(1.8rem, 10vw, 2.5rem);
    }

    .hero-subtitle {
        font-size: clamp(0.85rem, 5vw, 1rem);
        padding: 0 0.5rem;
    }

    .tariff-card {
        padding: 1.5rem;
    }

    .feature {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }

    .about-feature {
        padding: 1rem;
    }

    .about-feature i {
        font-size: 2rem;
    }

    .about-feature h4 {
        font-size: 1.1rem;
    }

    .about-feature p {
        font-size: 0.9rem;
    }
}

/* About Section */
.about-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.about-content {
    text-align: center;
    margin: 0 auto;
}

.about-text {
    margin-bottom: 3rem;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.95;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.about-feature {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.about-feature i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.about-feature h4 {
    margin: 0 0 1rem 0;
    font-size: 1.3rem;
    font-weight: 600;
}

.about-feature p {
    margin: 0;
    opacity: 0.9;
    line-height: 1.6;
}

/* Features Section */
.feature-category {
    margin-bottom: 4rem;
    padding: 2rem;
    background: var(--background-white);
    border-radius: 20px;
    box-shadow: 0 5px 20px var(--shadow-color);
}

.feature-category h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.feature-category h3 i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-item {
    padding: 1.5rem;
    background: var(--background-light);
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color);
    border-color: var(--primary-color);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (max-width: 767px) {
  html {
    zoom: 0.9;
  }
  .header {
    height: 100px;
    min-height: 100px;
    padding: 0;
  }
  .hero-section {
    margin-top: 100px;
  }
} 

/* Business Modal Styles */
.modal-overlay {
  position: fixed;
  z-index: 9999;
  left: 0; top: 0;
  width: 100vw; height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}
.modal-content {
  background: #fff;
  border-radius: 18px;
  max-width: 95vw;
  width: 370px;
  padding: 32px 20px 24px 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
  text-align: center;
  position: relative;
  animation: modalIn 0.25s cubic-bezier(.4,2,.6,1) both;
}
@keyframes modalIn {
  from { transform: translateY(40px) scale(0.95); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.modal-close {
  position: absolute;
  right: 16px; top: 12px;
  background: none;
  border: none;
  font-size: 2rem;
  color: #888;
  cursor: pointer;
  transition: color 0.2s;
}
.modal-close:hover { color: #1976d2; }
.modal-icon {
  font-size: 2.7rem;
  color: #1976d2;
  margin-bottom: 10px;
}
.modal-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.modal-text {
  font-size: 1rem;
  margin-bottom: 22px;
  color: #333;
}
.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.modal-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  background: #f5f5f5;
  color: #222;
  border: none;
  border-radius: 7px;
  padding: 11px 0;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
}
.app-btn {
  background: #1976d2;
  color: #fff;
}
.app-btn:hover {
  background: #1256a0;
}
.telegram-btn {
  background: #229ED9;
  color: #fff;
}
.telegram-btn:hover {
  background: #1577a6;
}
@media (max-width: 480px) {
  .modal-content { width: 98vw; padding: 18px 4vw 16px 4vw; }
  .modal-title { font-size: 1.1rem; }
  .modal-btn { font-size: 0.97rem; }
} 

/* ID Dialog input style */
#idDialog input[type="text"]:focus {
  border-color: #1976d2;
  box-shadow: 0 0 0 2px #1976d233;
}