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

body {
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: #e7edf5;
    background: #0b1220;
}

header {
    padding: 55px 20px;
    text-align: center;
    background: #111c2f;
    border-bottom: 1px solid #263650;
}

header h1 {
    margin-bottom: 14px;
    font-size: 2.4rem;
}

header p {
    max-width: 700px;
    margin: auto;
    color: #aebcd0;
    line-height: 1.6;
}

main {
    width: min(1200px, 92%);
    margin: 40px auto;
}

.download-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
}

.download-card {
    display: flex;
    flex-direction: column;
    padding: 25px;
    min-height: 280px;
    background: #151f32;
    border: 1px solid #293a55;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgb(0 0 0 / 20%);
    transition:
        transform 0.2s ease,
        border-color 0.2s ease;
}

.download-card:hover {
    transform: translateY(-4px);
    border-color: #4e80bd;
}

.download-card.warning {
    border-color: #9b6933;
}

.file-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 65px;
    height: 65px;
    margin-bottom: 20px;
    font-weight: bold;
    color: #ffffff;
    background: #294568;
    border-radius: 8px;
}

.warning .file-icon {
    background: #7a4b21;
}

.download-card h2 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

.download-card p {
    margin-bottom: 25px;
    color: #aebcd0;
    line-height: 1.5;
}

.download-button {
    display: inline-block;
    margin-top: auto;
    padding: 12px 18px;
    color: #ffffff;
    text-align: center;
    text-decoration: none;
    background: #1769aa;
    border-radius: 6px;
    transition: background 0.2s ease;
}

.download-button:hover {
    background: #2184cf;
}

.download-button:focus {
    outline: 3px solid #87bff0;
    outline-offset: 3px;
}

.notice {
    margin-top: 40px;
    padding: 22px;
    background: #1b2638;
    border-left: 5px solid #d7943d;
    border-radius: 6px;
}

.notice h2 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.notice p {
    color: #bdc8d8;
    line-height: 1.6;
}

footer {
    padding: 25px;
    color: #8493a8;
    text-align: center;
    border-top: 1px solid #263650;
}

@media (max-width: 600px) {
    header {
        padding: 40px 18px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    main {
        margin-top: 25px;
    }
}