:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #06b6d4;
    --accent-color: #8b5cf6;
    --text-color: #1f2937;
    --light-bg: #f3f4f6;
    --gradient-start: #4f46e5;
    --gradient-end: #06b6d4;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

header {
    background-color: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    padding: 1rem;
    z-index: 1001;
    background: var(--white);
    width: 100%;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-left: 1rem;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 0.8rem 1rem;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid #eee;
}

.main-content {
    margin-top: 70px;
}

.hero {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    padding: 6rem 1rem;
    text-align: center;
    color: var(--white);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.editor-section {
    background: var(--white);
    padding: 3rem 1rem;
    border-radius: 8px;
    max-width: 800px;
    margin: -3rem auto 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 10;
}

#textEditor {
    width: 100%;
    height: 300px;
    margin: 1rem 0;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    resize: vertical;
}

.shortcuts-guide {
    margin: 2rem 0;
    padding: 1.5rem;
    background: #f9fafb;
    border-radius: 8px;
    text-align: left;
}

.shortcuts-guide h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e5e7eb;
}

.shortcut-key {
    background: #e5e7eb;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-weight: bold;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 4rem 1rem;
    background: var(--white);
}

.feature {
    text-align: center;
    padding: 1.5rem;
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature h3 {
    margin: 1rem 0;
    color: var(--primary-color);
}

.use-cases {
    padding: 4rem 1rem;
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.use-case-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.faq-section {
    padding: 4rem 1rem;
    background: var(--white);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.5rem;
    text-align: left;
    background: #f9fafb;
    border: none;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease-out;
    background: var(--white);
}

.faq-answer.active {
    padding: 1rem 1.5rem;
    max-height: 500px;
}

.cta-button {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    color: var(--white);
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
}

.app-store-badge {
    display: inline-block;
    transition: transform 0.3s;
    width: 140px;
}

.header-app-store {
    height: 35px;
}

footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 4rem 1rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

@media (max-width: 768px) {
    .header-container nav { display: none; }
    .mobile-nav { display: flex; }
    .menu-toggle { display: flex; }
    .hero { padding-top: 8rem; }
    .editor-section { margin: 1rem; }
}