* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;
    color: #e5f7ff;
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.22), transparent 32%),
        radial-gradient(circle at bottom right, rgba(20, 184, 166, 0.16), transparent 35%),
        linear-gradient(135deg, #020617, #0f172a 45%, #111827);
}

.install-page {
    width: 100%;
    min-height: 100vh;
    padding: 32px 18px 48px;
}

.install-hero {
    width: min(900px, 100%);
    margin: 0 auto 28px;
    padding: 34px 24px;
    text-align: center;
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-radius: 28px;
    background: rgba(15, 23, 42, 0.78);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(14px);
}

.app-icon-wrap {
    width: 104px;
    height: 104px;
    margin: 0 auto 18px;
    padding: 8px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.28), rgba(20, 184, 166, 0.16));
    box-shadow: 0 12px 32px rgba(56, 189, 248, 0.22);
}

.app-icon {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 24px;
}

.eyebrow {
    margin: 0 0 10px;
    color: #67e8f9;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.install-hero h1 {
    margin: 0;
    font-size: clamp(30px, 6vw, 48px);
    line-height: 1.18;
    letter-spacing: 0.02em;
}

.lead {
    max-width: 620px;
    margin: 18px auto 0;
    color: #cbd5e1;
    font-size: 16px;
    line-height: 1.8;
}

.install-button {
    margin-top: 24px;
    padding: 14px 26px;
    border: none;
    border-radius: 999px;
    color: #02111f;
    background: linear-gradient(135deg, #67e8f9, #38bdf8);
    font-weight: 800;
    font-size: 15px;
    cursor: pointer;
    box-shadow: 0 12px 30px rgba(56, 189, 248, 0.28);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.install-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 38px rgba(56, 189, 248, 0.36);
}

.install-hint {
    margin: 18px auto 0;
    color: #94a3b8;
    font-size: 13px;
    line-height: 1.7;
}

.install-main {
    width: min(900px, 100%);
    margin: 0 auto;
    display: grid;
    gap: 16px;
}

.install-card {
    display: grid;
    grid-template-columns: 54px 1fr;
    gap: 16px;
    padding: 22px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 22px;
    background: rgba(15, 23, 42, 0.72);
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
}

.card-icon {
    width: 54px;
    height: 54px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    color: #67e8f9;
    background:
        linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(20, 184, 166, 0.10));
    border: 1px solid rgba(125, 211, 252, 0.28);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.08em;
    box-shadow: inset 0 0 18px rgba(56, 189, 248, 0.08);
}

.card-icon.alert {
    color: #fbbf24;
    background:
        linear-gradient(135deg, rgba(251, 191, 36, 0.16), rgba(245, 158, 11, 0.08));
    border-color: rgba(251, 191, 36, 0.32);
}

.install-card h2 {
    margin: 0 0 12px;
    color: #f8fafc;
    font-size: 20px;
}

.install-card ol,
.install-card ul {
    margin: 0;
    padding-left: 1.25em;
    color: #cbd5e1;
    line-height: 1.85;
}

.install-card li {
    margin: 4px 0;
}

.small-note {
    margin: 12px 0 0;
    color: #93c5fd;
    font-size: 13px;
    line-height: 1.7;
}

.notice-card {
    border-color: rgba(251, 191, 36, 0.28);
    background: rgba(30, 41, 59, 0.72);
}

.bottom-actions {
    margin-top: 10px;
    text-align: center;
}

.home-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    padding: 13px 22px;
    border-radius: 999px;
    color: #e0f2fe;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid rgba(125, 211, 252, 0.35);
    background: rgba(14, 165, 233, 0.12);
    transition: background 0.18s ease, transform 0.18s ease;
}

.home-link:hover {
    background: rgba(14, 165, 233, 0.22);
    transform: translateY(-2px);
}

@media (max-width: 640px) {
    .install-page {
        padding: 22px 14px 36px;
    }

    .install-hero {
        padding: 28px 18px;
        border-radius: 24px;
    }

    .app-icon-wrap {
        width: 92px;
        height: 92px;
        border-radius: 25px;
    }

    .app-icon {
        border-radius: 21px;
    }

    .install-card {
        grid-template-columns: 1fr;
        padding: 20px;
    }

    .card-icon {
        width: 48px;
        height: 48px;
        border-radius: 16px;
        font-size: 13px;
    }

    .install-card h2 {
        font-size: 18px;
    }

    .install-card ol,
    .install-card ul {
        font-size: 14px;
    }
}