/* ===== CSS Variables ===== */
:root {
    --primary-color: #007AFF;
    --primary-dark: #0056b3;
    --secondary-color: #5856D6;
    --accent-color: #FF2D55;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-light: #86868b;
    --background: #ffffff;
    --background-secondary: #f5f5f7;
    --border-color: #d2d2d7;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

ul {
    list-style: none;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: #333;
    color: var(--background);
    transform: translateY(-2px);
}

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

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

.apple-icon {
    width: 20px;
    height: 20px;
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
}

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

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 700;
    border-radius: 10px;
}

.logo-text {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--background-secondary) 0%, var(--background) 100%);
}

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

.hero-content {
    max-width: 560px;
}

.hero h1 {
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1d1d1f, #3a3a3c);
    border-radius: 44px;
    padding: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--background);
    border-radius: 36px;
    overflow: hidden;
    padding: 20px;
}

.app-preview {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.preview-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
}

.preview-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.preview-line {
    height: 12px;
    background: var(--background-secondary);
    border-radius: 6px;
}

.preview-line.short {
    width: 60%;
}

.preview-card {
    flex: 1;
    background: linear-gradient(145deg, var(--background-secondary), #e8e8ed);
    border-radius: 16px;
}

.preview-buttons {
    display: flex;
    gap: 12px;
}

.preview-btn {
    flex: 1;
    height: 44px;
    background: var(--primary-color);
    border-radius: 12px;
}

.preview-btn:last-child {
    background: var(--background-secondary);
}

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--background);
    padding: 32px;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.1), rgba(88, 86, 214, 0.1));
    border-radius: 16px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--text-primary), #3a3a3c);
    text-align: center;
}

.cta h2 {
    color: var(--background);
    margin-bottom: 16px;
}

.cta p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
    margin-bottom: 32px;
}

/* ===== Legal Pages ===== */
.legal-hero {
    padding: 140px 0 60px;
    background: var(--background-secondary);
    text-align: center;
}

.legal-hero h1 {
    margin-bottom: 16px;
}

.last-updated {
    color: var(--text-light);
    font-size: 0.95rem;
}

.legal-content {
    padding: 60px 0 100px;
}

.legal-document {
    max-width: 800px;
    margin: 0 auto;
}

.legal-section {
    margin-bottom: 40px;
}

.legal-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.legal-section h3 {
    font-size: 1.125rem;
    margin: 24px 0 12px;
    color: var(--text-primary);
}

.legal-section p {
    margin-bottom: 16px;
    line-height: 1.8;
}

.legal-section ul,
.legal-section ol {
    margin: 16px 0;
    padding-left: 24px;
}

.legal-section li {
    margin-bottom: 8px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.legal-section ol {
    list-style: decimal;
}

.legal-section ul {
    list-style: disc;
}

.contact-list {
    list-style: none;
    padding-left: 0;
}

.contact-list li {
    padding: 8px 0;
}

/* ===== Support Page ===== */
.support-hero {
    padding: 140px 0 60px;
    background: var(--background-secondary);
    text-align: center;
}

.support-hero h1 {
    margin-bottom: 16px;
}

.support-hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.support-content {
    padding: 60px 0 100px;
}

.support-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
}

.faq-section h2 {
    margin-bottom: 30px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: var(--background);
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--background-secondary);
}

.faq-icon {
    width: 20px;
    height: 20px;
    color: var(--text-light);
    transition: var(--transition);
    flex-shrink: 0;
}

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

.faq-answer {
    display: none;
    padding: 0 24px 20px;
    background: var(--background);
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    line-height: 1.7;
}

.faq-answer ol {
    margin: 12px 0;
    padding-left: 24px;
    list-style: decimal;
}

.faq-answer ol li {
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.support-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 100px;
}

.contact-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    text-align: center;
}

.contact-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.1), rgba(88, 86, 214, 0.1));
    border-radius: 20px;
    margin: 0 auto 20px;
}

.contact-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.contact-card h3 {
    margin-bottom: 12px;
}

.contact-card p {
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.contact-card .btn {
    width: 100%;
    margin-bottom: 16px;
}

.response-time {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.info-card {
    background: var(--background-secondary);
    border-radius: var(--border-radius-lg);
    padding: 24px;
}

.info-card h3 {
    margin-bottom: 16px;
    font-size: 1rem;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-list li {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

.info-label {
    color: var(--text-light);
}

.info-value {
    color: var(--text-primary);
    font-weight: 500;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    margin-bottom: 16px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

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

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

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

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .phone-mockup {
        width: 240px;
        height: 480px;
    }

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

    .support-sidebar {
        position: static;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-brand {
        max-width: 100%;
        text-align: center;
    }

    .footer-brand .logo {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--background);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a.active::after {
        display: none;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-image {
        display: none;
    }

    .features {
        padding: 60px 0;
    }

    .cta {
        padding: 60px 0;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .faq-question {
        padding: 16px 20px;
        font-size: 0.95rem;
    }

    .faq-answer {
        padding: 0 20px 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .feature-card {
        padding: 24px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .legal-section h2 {
        font-size: 1.25rem;
    }
}