:root {
    --bg-cream: #fffceb;
    --tab-active: #F7CF49;
    --tab-hover: #A9E1FF;
    --text-dark: #222222;
    --text-gray: #5B5A56;
    --text-light-gray: #f1ecdf;
    --about-hover: #D5D0C1;
    --border-color: #e8e8e8;
    --tab-text: #868686;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--bg-cream);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

nav.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
    background: var(--bg-cream);
}

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

.logo-link {
    display: inline-block;
    text-decoration: none;
}

.logo-section img {
    height: 40px;
    display: block;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transition: all 0.2s;
    position: relative;
    padding-bottom: 2px;
}

.nav-links a:not(.contact-btn):hover {
    color: var(--text-dark);
}

.nav-links a:not(.contact-btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--text-dark);
    transition: width 0.3s ease;
}

.nav-links a:not(.contact-btn):hover::after {
    width: 100%;
}

.nav-links .contact-btn {
    background: var(--text-light-gray);
    color: var(--text-gray);
    padding: 10px 24px;
    transition: all 0.2s;
}

.nav-links .contact-btn:hover {
    background: var(--about-hover);
    color: var(--text-dark);
}

header {
    padding: 35px 0 25px;
    text-align: center;
    background: var(--bg-cream);
}

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

.header-image {
    max-width: 600px;
    height: auto;
    margin: 0 auto 10px;
}

.subtitle {
    font-family: 'Teachers', serif;
    font-size: 24px;
    color: var(--text-gray);
    max-width: 760px;
    margin: 0 auto;
    line-height: 1.65;
    font-weight: 400;
}

.feature-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0;
    max-width: 1100px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
    background: var(--white);
}

.tab-button {
    font-family: 'Teachers', serif;
    padding: 18px 20px;
    border: none;
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background: var(--white);
    color: var(--tab-text);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: center;
    position: relative;
}

.tab-button:last-child {
    border-right: none;
}

.tab-button:hover {
    background: var(--tab-hover);
}

.tab-button.active {
    background: var(--tab-active);
    color: var(--text-dark);
}

.demo-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0;
    background: #f8f8f8;
    border: 1px solid var(--border-color);
    border-top: none;
}

.phone-mockup {
    position: relative;
    width: 100%;
}

.phone-frame {
    background: #f8f8f8;
    padding: 45px;
    position: relative;
    overflow: hidden;
}

.phone-screen {
    background: #f8f8f8;
    padding: 30px;
    min-height: 450px;
    position: relative;
}

.feature-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.feature-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.feature-header {
    margin-bottom: 25px;
    text-align: left;
}

.feature-header h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-header p {
    font-family: 'Teachers', serif;
    color: var(--text-gray);
    font-size: 16px;
    line-height: 1.6;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    background: #f8f8f8;
    border: none;
}

.demo-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.demo-caption {
    margin-top: 60px;
    text-align: center;
    padding: 40px 0;
    background: var(--bg-cream);
}

.demo-caption p {
    font-family: 'Teachers', serif;
    color: var(--text-gray);
    font-size: 16px;
    font-style: italic;
}

.cta-section {
    padding: 60px 0 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-cream);
}

.cta-button {
    padding: 14px 32px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: opacity 0.2s;
    display: inline-block;
    min-width: 200px;
    text-align: center;
    cursor: pointer;
}

.cta-button.blue {
    background: var(--tab-hover);
    color: var(--text-dark);
    border: 2px solid var(--tab-hover);
}

.cta-button.blue:hover {
    opacity: 0.85;
    transform: translateY(-2px);
    transition: all 0.2s;
}

/* Mobile Menu Styles */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-gray);
    margin: 5px 0;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-cream);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

.mobile-menu a {
    display: block;
    padding: 18px 30px;
    font-family: 'Teachers', serif;
    font-size: 16px;
    color: var(--text-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.mobile-menu a:hover {
    background: var(--tab-hover);
    color: var(--text-dark);
}

.mobile-menu a.active-mobile {
    background: var(--tab-active);
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    nav.top-nav {
        padding: 20px;
        justify-content: space-between;
    }

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

    .nav-links {
        display: none;
    }

    .header-image {
        max-width: 100%;
        padding: 0 20px;
    }

    .subtitle {
        font-size: 19px;
        padding: 0 20px;
    }

    .feature-tabs {
        grid-template-columns: 1fr;
        margin: 20px;
    }

    .tab-button {
        border-right: none;
    }

    .phone-frame {
        padding: 30px 20px;
    }

    .phone-screen {
        padding: 20px;
        min-height: 400px;
    }

    .cta-button {
        width: 100%;
        max-width: 280px;
    }

    .cta-section {
        flex-direction: column;
        align-items: center;
    }
}