/* ===== 20-20-20 护眼提醒 ===== */
#erApp .er-hero { text-align: center; padding: 12px 10px 0; }
#erApp .er-hero h1 { font-size: 30px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#erApp .er-hero p { font-size: 15px; color: var(--c-text-sub); line-height: 1.7; }

#erApp .er-panel {
    max-width: 720px; margin: 18px auto 0; background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--radius-md); padding: 20px 18px; box-shadow: var(--shadow-md); text-align: center;
}
#erApp .er-opts { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 18px; }
#erApp .er-opt {
    border: 2px solid var(--c-primary); background: transparent; color: var(--c-primary);
    border-radius: 999px; padding: 7px 14px; font-size: 14px; font-weight: 700; cursor: pointer;
}
#erApp .er-opt.is-on { background: var(--c-primary); color: #fff; }
#erApp .er-lab { font-size: 13px; color: var(--c-text-sub); margin: 0 6px; }

#erApp .er-ring {
    width: 220px; height: 220px; margin: 0 auto; border-radius: 50%;
    background: conic-gradient(var(--c-primary) 0deg, var(--c-surface-soft) 0deg);
    display: flex; align-items: center; justify-content: center; position: relative;
}
#erApp .er-ring::after {
    content: ''; position: absolute; inset: 14px; border-radius: 50%; background: var(--c-surface);
}
#erApp .er-inner { position: relative; z-index: 1; }
#erApp .er-time { font-size: 44px; font-weight: 800; color: var(--c-text); line-height: 1.1; }
#erApp .er-phase { font-size: 14px; color: var(--c-text-sub); margin-top: 4px; }
#erApp .er-hint { font-size: 13px; color: var(--c-text-sub); margin-top: 8px; line-height: 1.7; }

#erApp .er-ctrl { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 18px; }
#erApp .er-btn {
    border: none; border-radius: 999px; padding: 12px 22px; font-size: 15px; font-weight: 700; color: #fff;
    cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan)); box-shadow: var(--shadow-md);
}
#erApp .er-btn.gray { background: var(--c-surface-2); color: var(--c-text); box-shadow: none; border: 1px solid var(--c-border); }
#erApp .er-btn:disabled { opacity: .5; cursor: not-allowed; }

#erApp .er-stat {
    max-width: 720px; margin: 18px auto 0; background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--radius-md); padding: 14px 18px; box-shadow: var(--shadow-md);
    text-align: center; font-size: 14px; line-height: 1.9; color: var(--c-text-sub);
}
#erApp .er-stat b { color: var(--c-primary); font-size: 18px; }

#erApp .er-modal {
    position: fixed; inset: 0; z-index: 9999; display: none; align-items: center; justify-content: center;
    background: rgba(15, 23, 42, .78); padding: 20px;
}
#erApp .er-modal.show { display: flex; }
#erApp .er-mbox {
    background: #fff; color: #0f172a; border-radius: 20px; padding: 28px 24px; max-width: 420px; width: 100%;
    text-align: center; box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
}
#erApp .er-mbox h3 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
#erApp .er-mtime { font-size: 56px; font-weight: 800; color: #0ea5e9; line-height: 1.1; margin: 6px 0; }
#erApp .er-mtip { font-size: 15px; color: #475569; line-height: 1.8; margin-bottom: 14px; }
#erApp .er-mbtn {
    border: none; border-radius: 999px; padding: 12px 24px; font-size: 16px; font-weight: 800; color: #fff;
    background: linear-gradient(135deg, #0ea5e9, #22c55e); cursor: pointer;
}

#erApp .er-ai, #erApp .er-info { max-width: 760px; margin: 30px auto 0; }
#erApp .er-ai h2, #erApp .er-info h2 { font-size: 20px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#erApp .er-ai p { font-size: 14px; color: var(--c-text-sub); line-height: 1.8; margin-bottom: 14px; }
#erApp .er-ai-row { display: flex; gap: 10px; flex-wrap: wrap; }
#erApp .er-out {
    margin-top: 14px; background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 16px 18px; font-size: 15px; line-height: 1.85;
    color: var(--c-text); white-space: pre-wrap;
}
#erApp .er-info ul { list-style: disc; padding-left: 22px; margin-bottom: 24px; }
#erApp .er-info li { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); margin-bottom: 8px; }
#erApp .er-info li b { color: var(--c-text); }

@media (max-width: 560px) {
    #erApp .er-hero h1 { font-size: 24px; }
    #erApp .er-ring { width: 180px; height: 180px; }
    #erApp .er-time { font-size: 36px; }
}