/* Cipher Lab (C20) — feature-scoped styles. Uses :root tokens from main.css
   and respects [data-theme="dark"] through those tokens. */

.tool-layout--cipher {
    max-width: 56rem;
    margin: 0 auto;
    padding: 0 1rem 3rem;
}

.cipher-input-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem;
    margin: 1.5rem 0;
}

.cipher-label {
    display: block;
    font-size: var(--fs-4);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cipher-textarea {
    width: 100%;
    max-width: 100%;
    font-family: var(--font-mono);
    font-size: var(--fs-3);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.75rem;
    resize: vertical;
}

.cipher-textarea:focus-visible {
    outline: 2px solid var(--color-link);
    outline-offset: 1px;
}

.cipher-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1rem;
    margin-top: 0.75rem;
}

.cipher-teach-toggle {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
    gap: 0.4rem;
    font-size: var(--fs-4);
    cursor: pointer;
}

.cipher-char-count {
    margin-left: auto;
    font-size: var(--fs-5);
    color: var(--color-text-muted);
}

.cipher-validation {
    color: var(--color-accent-dark);
    font-size: var(--fs-4);
    margin-top: 0.5rem;
}

.cipher-examples {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.cipher-examples__label {
    font-size: var(--fs-5);
    color: var(--color-text-muted);
}

.cipher-examples .chip {
    min-height: 2.75rem;
    font-family: var(--font-mono);
    font-size: var(--fs-5);
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-bg-alt);
    color: var(--color-text);
    cursor: pointer;
}

.cipher-examples .chip:hover,
.cipher-examples .chip:focus-visible {
    border-color: var(--color-border-strong);
}

.cipher-candidate {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-bg-card);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.cipher-candidate--top {
    border-color: var(--color-border-strong);
}

.cipher-candidate__header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1rem;
    margin-bottom: 0.5rem;
}

.cipher-candidate__rank {
    font-size: var(--fs-5);
    color: var(--color-text-muted);
}

.cipher-candidate__label {
    font-size: var(--fs-3);
    font-weight: 600;
    margin: 0;
}

.cipher-candidate__score {
    margin-left: auto;
    font-size: var(--fs-4);
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.cipher-candidate__meter {
    height: 6px;
    border-radius: 3px;
    background: var(--color-bg-alt);
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.cipher-candidate__meter-fill {
    height: 100%;
    background: var(--color-link);
}

.cipher-candidate__plaintext {
    font-family: var(--font-mono);
    font-size: var(--fs-3);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.6rem 0.75rem;
    margin: 0 0 0.75rem;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
}

.cipher-candidate__words {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 0 0 0.5rem;
    padding: 0;
    list-style: none;
}

.cipher-candidate__words li {
    font-size: var(--fs-5);
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
}

.cipher-candidate__steps {
    margin: 0.5rem 0 0;
    padding-left: 1.25rem;
    font-size: var(--fs-4);
    color: var(--color-text-secondary);
}

.cipher-candidate__steps li {
    margin-bottom: 0.35rem;
}

.cipher-candidate__steps strong {
    color: var(--color-text);
}

.cipher-empty,
.cipher-error {
    font-size: var(--fs-4);
    color: var(--color-text-muted);
    padding: 1rem 0;
}

.cipher-about ul {
    padding-left: 1.25rem;
}

.cipher-about li {
    margin-bottom: 0.4rem;
}

@media (prefers-reduced-motion: no-preference) {
    .cipher-candidate__meter-fill {
        transition: width 0.3s ease;
    }
}