.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.page-hero {
    padding: 148px 0 48px;
    text-align: center;
}

.page-hero .section-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 16px;
}

.page-hero h1 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.35;
    margin-bottom: 20px;
}

.page-hero-desc {
    max-width: 640px;
    margin: 0 auto 28px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.9;
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
}

.tool-section {
    padding-top: 64px;
    padding-bottom: 80px;
}

.section-surface {
    background-color: var(--bg-surface);
}

.section-header {
    margin-bottom: 48px;
}

.section-header.center {
    text-align: center;
}

.section-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    color: var(--accent);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 640px;
}

.section-header.center p {
    margin: 0 auto;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
    align-items: stretch;
    gap: 24px;
}

.workspace-setup,
.workspace-output {
    min-width: 0;
    border-radius: 20px;
    overflow: hidden;
}

.workspace-setup {
    padding: 28px;
    background: #fff;
    border: 1px solid var(--border-color);
}

.mode-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 24px;
    border: 0;
}

.mode-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 14px 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    background: var(--bg-surface);
    cursor: pointer;
}

.mode-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.mode-card-name {
    font-size: 14px;
    font-weight: 800;
}

.mode-card-desc {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.mode-card:hover {
    border-color: var(--accent-light);
}

.mode-card:has(input:checked) {
    background: #EFF6FF;
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent);
}

.mode-card:has(input:checked) .mode-card-name {
    color: var(--accent);
}

.setup-body {
    margin-bottom: 24px;
}

.metric-grid {
    display: grid;
    grid-template-columns: 1fr 88px;
    gap: 12px;
    margin-bottom: 8px;
}

#config-passphrase .metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric {
    padding: 14px;
    border-radius: 14px;
    background: var(--bg-surface);
}

.metric-wide {
    grid-column: 1 / 2;
}

.metric label,
.setup-label,
.constraint label {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
}

.metric-value {
    width: 100%;
    border: 0;
    background: transparent;
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.metric-slider {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.metric-note {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.input-text,
select.input-text {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 12px;
    background: #fff;
    color: var(--text-primary);
}

.input-text:focus,
select.input-text:focus,
.metric-value:focus {
    outline: none;
}

.input-text:focus,
select.input-text:focus {
    border-color: var(--accent-light);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

.setup-block {
    margin-top: 20px;
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: #fff;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.chip input {
    accent-color: var(--accent);
}

.chip:has(input:checked) {
    background: #EFF6FF;
    border-color: var(--accent);
    color: var(--accent);
}

.constraint-grid {
    display: grid;
    gap: 12px;
}

.constraint {
    min-width: 0;
}

.btn-block {
    width: 100%;
}

.hint {
    margin-top: 8px;
    font-size: 13px;
    color: #b45309;
}

.workspace-output {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--border-color);
}

.output-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 24px;
    background: var(--accent);
    color: #fff;
}

.output-kicker {
    margin-bottom: 10px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.72);
}

.strength-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 220px;
}

.strength-label,
.strength-text {
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

.strength-track {
    flex: 1;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.22);
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.strength-fill.weak { background: #fecaca; }
.strength-fill.medium { background: #fde68a; }
.strength-fill.strong { background: #93c5fd; }
.strength-fill.very-strong { background: #6ee7b7; }

.output-head .hint {
    color: #fde68a;
}

.output-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.output-tool {
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 999px;
    background: transparent;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}

.output-tool:hover {
    background: rgba(255, 255, 255, 0.12);
}

.results {
    flex: 1;
    padding: 8px 16px 16px;
}

.result-list {
    display: flex;
    flex-direction: column;
}

.result-item {
    display: grid;
    grid-template-columns: 36px minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 16px 8px;
    border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
    border-bottom: 0;
}

.result-index {
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: var(--accent);
}

.result-pwd {
    font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 15px;
    word-break: break-all;
    color: var(--text-primary);
}

.result-copy {
    padding: 0;
    border: 0;
    background: none;
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

.result-copy:hover {
    color: var(--accent-light);
}

.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.card h3 {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--accent);
}

.card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.card a {
    color: var(--accent);
    font-weight: 700;
}

.card a:hover {
    color: var(--accent-light);
}

a.card {
    display: block;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

a.card:hover {
    border-color: var(--accent-light);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(29, 78, 216, 0.08);
}

.rule-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.rule-item {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
}

.rule-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.rule-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.rule-item a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    padding: 32px 0;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: var(--accent-light);
    transition: transform 0.3s;
    font-weight: 300;
}

.faq-item.active .faq-question::after,
.faq-item.is-open .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

.faq-item.active .faq-answer,
.faq-item.is-open .faq-answer {
    padding-bottom: 32px;
}

.faq-answer a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.bottom-cta {
    text-align: center;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
}

.bottom-cta h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 16px;
}

.bottom-cta > .container > p {
    max-width: 560px;
    margin: 0 auto 32px;
    color: var(--text-secondary);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%) translateY(12px);
    z-index: 200;
    padding: 12px 20px;
    border-radius: 999px;
    background: var(--text-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 900px) {
    .workspace {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .workspace-setup {
        padding: 20px;
    }

    .mode-cards,
    .metric-grid,
    #config-passphrase .metric-grid {
        grid-template-columns: 1fr;
    }

    .result-item {
        grid-template-columns: 28px minmax(0, 1fr);
    }

    .result-copy {
        grid-column: 2;
        justify-self: start;
    }
}