/* ============================================================
   36if 工具箱 · 安全密码生成器 · 专属样式（password-generator.css）
   ============================================================ */

.intro {
    padding: 48px 0 24px;
}

.intro p {
    max-width: 68ch;
    font-size: 15px;
    color: var(--muted);
    margin: 0 0 8px;
}

.intro code {
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    font-size: 13px;
    background: rgba(31, 111, 99, 0.08);
    color: var(--teal-deep);
    padding: 2px 6px;
    border-radius: 4px;
}

.tool-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 40px;
}

.password-row {
    display: flex;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 20px;
}

.password-output {
    flex: 1;
    min-width: 0;
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    font-size: 18px;
    letter-spacing: 0.06em;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paste-bg, #fffef9);
    color: var(--ink);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.password-output:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(31, 111, 99, 0.12);
}

.icon-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 52px;
    height: 52px;
    padding: 0 16px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: var(--surface, #fff);
    color: var(--teal);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
}

.icon-btn svg {
    display: block;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.icon-btn:hover {
    background: #f0f6f4;
    border-color: var(--teal);
    color: var(--teal-deep);
}

.icon-btn:active {
    transform: translateY(1px);
}

.icon-btn.copied {
    background: var(--teal);
    border-color: var(--teal);
    color: #fff;
}

.options {
    background: var(--options-bg, #faf9f5);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px 20px 20px;
    margin: 0 0 18px;
}

.option-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.range-label {
    font-family: "JetBrains Mono", monospace;
    font-size: 12.5px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.range-value {
    font-family: "JetBrains Mono", monospace;
    font-size: 15px;
    font-weight: 700;
    color: var(--teal-deep);
    background: rgba(31, 111, 99, 0.1);
    padding: 2px 10px;
    border-radius: 999px;
}

.range-input {
    width: 100%;
    accent-color: var(--teal);
    height: 6px;
    cursor: pointer;
    margin: 6px 0 4px;
}

.range-limits {
    display: flex;
    justify-content: space-between;
    font-family: "JetBrains Mono", monospace;
    font-size: 11px;
    color: var(--muted);
}

.charset-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.charset-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface, #fff);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
    user-select: none;
}

.charset-item:hover {
    border-color: var(--teal);
    background: #f6fbf9;
}

.charset-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--teal);
    flex-shrink: 0;
    cursor: pointer;
}

.charset-item:has(input:checked) {
    border-color: var(--teal);
    background: rgba(31, 111, 99, 0.06);
    box-shadow: inset 0 0 0 1px rgba(31, 111, 99, 0.12);
}

.charset-text {
    display: flex;
    flex-direction: column;
    line-height: 1.35;
    font-size: 14px;
    color: var(--ink);
}

.charset-sample {
    font-family: "JetBrains Mono", monospace;
    font-size: 11.5px;
    color: var(--muted);
    margin-top: 1px;
}

.charset-hint {
    margin: 10px 0 0;
    font-family: "JetBrains Mono", monospace;
    font-size: 12px;
    color: var(--text-muted, #8B8672);
    min-height: 18px;
}

.btn-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.btn-row button {
    padding: 12px 28px;
    border: 1px solid var(--teal);
    background: var(--teal);
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: background 0.15s, border-color 0.15s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-row button svg {
    display: block;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-row button:hover {
    background: var(--teal-deep);
    border-color: var(--teal-deep);
}

.btn-row button:active {
    transform: translateY(1px);
}

.security-note {
    margin: 18px 0 0;
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-muted, #8B8672);
    background: rgba(201, 138, 62, 0.06);
    border-left: 3px solid var(--gold);
    border-radius: 0 6px 6px 0;
    padding: 12px 16px;
}

.security-note code {
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    font-size: 12px;
    background: rgba(31, 111, 99, 0.08);
    color: var(--teal-deep);
    padding: 1px 5px;
    border-radius: 4px;
}

.how-it-works {
    max-width: 820px;
    padding: 8px 0 8px;
    margin-bottom: 24px;
}

.how-it-works h2 {
    font-family: "Fraunces", Georgia, serif;
    font-size: 22px;
    margin: 0 0 20px;
}

.step-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.step-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    font-size: 15px;
    line-height: 1.8;
    color: var(--ink);
}

.step-num {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: rgba(31, 111, 99, 0.1);
    color: var(--teal-deep);
    font-family: "JetBrains Mono", monospace;
    font-weight: 700;
    font-size: 14px;
}

.step-list code {
    font-family: "JetBrains Mono", Consolas, Menlo, monospace;
    font-size: 12.5px;
    background: rgba(31, 111, 99, 0.08);
    color: var(--teal-deep);
    padding: 1px 6px;
    border-radius: 4px;
}

.faq {
    max-width: 820px;
    padding: 8px 0 56px;
}

.faq h2 {
    font-family: "Fraunces", Georgia, serif;
    font-size: 20px;
    margin: 0 0 18px;
}

.faq-item {
    border: 1px solid var(--line);
    border-radius: var(--radius, 10px);
    margin-bottom: 12px;
    padding: 0 20px;
    transition: box-shadow 0.18s, border-color 0.18s;
}

.faq-item:last-child {
    margin-bottom: 0;
}

.faq-item[open] {
    box-shadow: 0 2px 4px -1px rgba(28, 35, 33, 0.06);
    border-color: rgba(31, 111, 99, 0.35);
}

.faq-item summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    user-select: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    flex-shrink: 0;
    font-size: 18px;
    line-height: 1;
    color: var(--muted);
    transition: transform 0.18s, color 0.18s;
}

.faq-item[open] summary::after {
    content: "×";
    color: var(--teal);
}

.faq-item p {
    font-size: 14px;
    line-height: 1.75;
    color: var(--muted);
    margin: 0;
    padding: 0 0 18px;
    max-width: 68ch;
}

.tool-footer-note {
    padding: 8px 0 40px;
    font-size: 12px;
    color: var(--text-muted, #8B8672);
    line-height: 1.7;
}

.tool-footer-note .box {
    border-top: 1px solid var(--line);
    padding-top: 16px;
}

@media (max-width: 640px) {
    .tool-card {
        padding: 20px 18px;
    }

    .password-output {
        font-size: 15px;
        padding: 12px 12px;
        letter-spacing: 0.03em;
    }

    .icon-btn {
        padding: 0 12px;
        font-size: 13px;
    }

    .charset-grid {
        grid-template-columns: 1fr;
    }

    .step-list li {
        font-size: 14px;
        gap: 10px;
    }

    .step-num {
        width: 26px;
        height: 26px;
        font-size: 12px;
    }

    .btn-row button {
        flex: 1 1 auto;
        padding: 12px 16px;
    }
}