/* ============================================
   Encryption & Decryption Tool - Mobile-first
   ============================================ */

:root {
    --enc-bg: #fff;
    --enc-surface: #f8fafc;
    --enc-border: #e2e8f0;
    --enc-border-focus: #0ea5e9;
    --enc-text: #0f172a;
    --enc-text-muted: #64748b;
    --enc-primary: #0ea5e9;
    --enc-primary-hover: #0284c7;
    --enc-decrypt: #f97316;
    --enc-decrypt-hover: #ea580c;
    --enc-pill-bg: #f1f5f9;
    --enc-pill-active-bg: #0ea5e9;
    --enc-pill-active-text: #fff;
    --enc-output-bg: #1e293b;
    --enc-output-text: #94a3b8;
    --enc-output-border: #334155;
    --enc-radius: 12px;
    --enc-radius-sm: 8px;
    --enc-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --enc-shadow-lg: 0 10px 40px -10px rgba(0, 0, 0, 0.12);
}

/* --- Tool card --- */
.enc-tool-card {
    margin-bottom: 2rem;
}

.enc-card-inner {
    background: var(--enc-bg);
    border: 1px solid var(--enc-border);
    border-radius: var(--enc-radius);
    box-shadow: var(--enc-shadow);
    padding: 1.25rem;
}

@media (min-width: 768px) {
    .enc-card-inner {
        padding: 1.75rem;
    }
}

/* --- Blocks --- */
.enc-block {
    margin-bottom: 1.25rem;
}

.enc-block:last-child {
    margin-bottom: 0;
}

.enc-block-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--enc-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
}

.enc-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--enc-text);
    margin-bottom: 0.375rem;
}

/* --- Pills (algorithm & mode) --- */
.enc-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.enc-algorithm-pills {
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
}

.enc-pill {
    flex-shrink: 0;
    min-height: 44px;
    padding: 0.5rem 1rem;
    border: 1px solid var(--enc-border);
    border-radius: 999px;
    background: var(--enc-pill-bg);
    color: var(--enc-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.enc-pill:hover {
    border-color: var(--enc-primary);
    background: #e0f2fe;
}

.enc-pill.active {
    background: var(--enc-pill-active-bg);
    border-color: var(--enc-pill-active-bg);
    color: var(--enc-pill-active-text);
}

.enc-pill:focus-visible {
    outline: 2px solid var(--enc-primary);
    outline-offset: 2px;
}

/* --- Key / IV rows --- */
.enc-keys {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.enc-key-row {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.enc-key-wrap {
    display: flex;
    gap: 0.5rem;
    align-items: stretch;
}

.enc-input {
    flex: 1;
    min-width: 0;
    min-height: 44px;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--enc-border);
    border-radius: var(--enc-radius-sm);
    background: var(--enc-bg);
    color: var(--enc-text);
    font-size: 0.9375rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.enc-input::placeholder {
    color: var(--enc-text-muted);
}

.enc-input:focus {
    outline: none;
    border-color: var(--enc-border-focus);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.enc-btn-gen {
    flex-shrink: 0;
    min-height: 44px;
    padding: 0.625rem 1rem;
    border: 1px solid var(--enc-border);
    border-radius: var(--enc-radius-sm);
    background: var(--enc-surface);
    color: var(--enc-text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.enc-btn-gen:hover {
    background: #e2e8f0;
    border-color: #cbd5e1;
}

.enc-btn-gen:focus-visible {
    outline: 2px solid var(--enc-primary);
    outline-offset: 2px;
}

.enc-hint {
    font-size: 0.75rem;
    color: var(--enc-text-muted);
}

/* --- Input textarea --- */
.enc-textarea {
    width: 100%;
    min-height: 140px;
    padding: 0.875rem;
    border: 1px solid var(--enc-border);
    border-radius: var(--enc-radius-sm);
    background: var(--enc-bg);
    color: var(--enc-text);
    font-size: 0.9375rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.enc-textarea::placeholder {
    color: var(--enc-text-muted);
}

.enc-textarea:focus {
    outline: none;
    border-color: var(--enc-border-focus);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

/* --- Actions (Encrypt / Decrypt) --- */
.enc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.enc-btn {
    min-height: 48px;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--enc-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    -webkit-tap-highlight-color: transparent;
}

.enc-btn:active {
    transform: scale(0.98);
}

.enc-btn:focus-visible {
    outline: 2px solid var(--enc-text);
    outline-offset: 2px;
}

.enc-btn-encrypt {
    background: var(--enc-primary);
    color: #fff;
}

.enc-btn-encrypt:hover {
    background: var(--enc-primary-hover);
}

.enc-btn-decrypt {
    background: var(--enc-decrypt);
    color: #fff;
}

.enc-btn-decrypt:hover {
    background: var(--enc-decrypt-hover);
}

/* --- Output --- */
.enc-output-block {
    margin-bottom: 0;
}

.enc-output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.enc-btn-copy {
    min-height: 36px;
    padding: 0.5rem 1rem;
    border: 1px solid var(--enc-output-border);
    border-radius: var(--enc-radius-sm);
    background: var(--enc-output-bg);
    color: var(--enc-output-text);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.enc-btn-copy:hover {
    background: #334155;
    color: #f1f5f9;
}

.enc-output {
    min-height: 120px;
    padding: 1rem;
    border: 1px solid var(--enc-output-border);
    border-radius: var(--enc-radius-sm);
    background: var(--enc-output-bg);
    color: var(--enc-output-text);
    font-size: 0.875rem;
    line-height: 1.5;
    word-break: break-all;
    white-space: pre-wrap;
}

.enc-output-header .enc-label {
    margin-bottom: 0;
}

/* --- Mode block visibility (JS toggles .enc-iv-hidden) --- */
.enc-modes.enc-hidden,
.enc-iv-row.enc-iv-hidden {
    display: none;
}

@media (max-width: 767px) {
    .enc-actions {
        flex-direction: column;
    }

    .enc-btn {
        width: 100%;
    }

    .enc-key-wrap {
        flex-direction: column;
    }

    .enc-btn-gen {
        width: 100%;
    }
}