html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body {
    font-family: Inter, system-ui, sans-serif;
    background: linear-gradient(180deg, #f7f9fc, #eef2f7);
    color: #1f2937;
    min-height: 100vh;
}

.landing {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 16px;
    min-height: 80vh;
}

.hero {
    text-align: center;
    animation: fade-up 0.8s ease-out;
}

.hero h1 {
    font-size: 32px;
    margin-bottom: 12px;
}

.hero p {
    font-size: 16px;
    color: #4b5563;
    margin-bottom: 24px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta {
    display: inline-block;
    padding: 12px 20px;
    background: #2563eb;
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: transform .2s, box-shadow .2s;
}

.cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37 99 235 / 30%);
}

.preview {
    margin: 48px 0;
    display: flex;
    justify-content: center;
}

.schedule-preview {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: 8px;
    width: 100%;
    max-width: 320px;
    background: #fff;
    padding: 16px;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0 0 0 / 8%);
    animation: fade-in 1s ease-out;
}

.schedule-preview > div {
    padding: 8px;
    border-radius: 6px;
    background: #f1f5f9;
    font-size: 13px;
    opacity: 0;
    animation: cell-appear .6s ease forwards;
}

.schedule-preview > div:nth-child(1) { animation-delay: .1s }
.schedule-preview > div:nth-child(2) { animation-delay: .2s }
.schedule-preview > div:nth-child(3) { animation-delay: .3s }
.schedule-preview > div:nth-child(4) { animation-delay: .4s }
.schedule-preview > div:nth-child(5) { animation-delay: .5s }
.schedule-preview > div:nth-child(6) { animation-delay: .6s }
.schedule-preview > div:nth-child(7) { animation-delay: .7s }
.schedule-preview > div:nth-child(8) { animation-delay: .8s }
.schedule-preview > div:nth-child(9) { animation-delay: .9s }

.features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.feature {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0 0 0 / 6%);
    animation: fade-up 1s ease-out;
}

.feature h3 {
    margin-top: 0;
    font-size: 16px;
}

.feature p {
    font-size: 14px;
    color: #6b7280;
}

.feature-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-title svg {
    width: 1.2em;
    height: 1.2em;
    flex-shrink: 0;
}

@media (width >= 640px) {
    .landing {
        padding: 60px 24px;
    }

    .hero h1 {
        font-size: 40px;
    }

    .features {
        grid-template-columns: repeat(2, 1fr);
    }

    .schedule-preview {
        max-width: 420px;
    }
}

@media (width >= 900px) {
    .hero h1 {
        font-size: 44px;
    }

    .features {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (width >= 1200px) {
    .landing {
        padding: 80px 40px;
    }

    .hero h1 {
        font-size: 48px;
    }

    .features {
        grid-template-columns: repeat(5, 1fr);
    }

    .schedule-preview {
        max-width: 520px;
    }
}

@media (width <= 480px) {
    .cta {
        width: 100%;
        padding: 12px 0;
        text-align: center;
    }
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes fade-in {
    from { opacity: 0 }
    to { opacity: 1 }
}

@keyframes cell-appear {
    to { opacity: 1; }
}