/**
 * BaseForge — Technical Encoding & Hashing Toolkit
 * Dark cybersecurity / forensic utility aesthetic
 */

:root {
    --bg-primary: #080b0d;
    --bg-secondary: #101619;
    --bg-panel: #12191c;
    --bg-elevated: #171f23;
    --bg-hover: #1c262b;
    --border: #263238;
    --border-strong: #334047;
    --border-accent: rgba(57, 255, 136, 0.35);
    --accent: #39ff88;
    --accent-dim: rgba(57, 255, 136, 0.12);
    --accent-secondary: #00d9ff;
    --accent-secondary-dim: rgba(0, 217, 255, 0.12);
    --text-primary: #e8f1ed;
    --text-secondary: #8b9a94;
    --text-dim: #5f6f68;
    --warning: #ffcc66;
    --warning-dim: rgba(255, 204, 102, 0.12);
    --danger: #ff5c5c;
    --danger-dim: rgba(255, 92, 92, 0.12);
    --info: #00d9ff;
    --info-dim: rgba(0, 217, 255, 0.1);
    --font-sans: "IBM Plex Sans", "Segoe UI", Tahoma, sans-serif;
    --font-mono: "IBM Plex Mono", "Consolas", "Courier New", monospace;
    --radius: 6px;
    --radius-sm: 3px;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
    --header-h: 76px;
    --focus-ring: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent);
    --transition: 160ms ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    color: var(--text-primary);
    background:
        radial-gradient(ellipse 70% 45% at 50% -15%, rgba(57, 255, 136, 0.06), transparent 55%),
        radial-gradient(ellipse 50% 40% at 100% 0%, rgba(0, 217, 255, 0.04), transparent 50%),
        linear-gradient(180deg, #0b1013 0%, var(--bg-primary) 45%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
}

body.modal-open {
    overflow: hidden;
}

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

.is-hidden {
    display: none !important;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 2000;
    padding: 0.55rem 1rem;
    background: var(--accent);
    color: #04140c;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    left: 0.75rem;
    top: 0.75rem;
}

:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ---------- Shell ---------- */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    background: rgba(8, 11, 13, 0.92);
    backdrop-filter: blur(12px);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0.9rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    flex-wrap: wrap;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.brand-mark {
    color: var(--accent);
    display: flex;
    flex-shrink: 0;
}

.brand-name {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.1;
    color: var(--text-primary);
}

.brand-subtitle {
    margin: 0.15rem 0 0;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    color: var(--accent-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.7rem;
    border: 1px solid var(--border-accent);
    background: var(--accent-dim);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    border-radius: 999px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 0 rgba(57, 255, 136, 0.55);
    animation: pulse-dot 2.2s ease-out infinite;
}

@keyframes pulse-dot {
    0% { box-shadow: 0 0 0 0 rgba(57, 255, 136, 0.55); }
    70% { box-shadow: 0 0 0 8px rgba(57, 255, 136, 0); }
    100% { box-shadow: 0 0 0 0 rgba(57, 255, 136, 0); }
}

.main-nav {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.nav-btn {
    appearance: none;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.45rem 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-btn.is-active {
    color: var(--accent);
    border-color: var(--border-accent);
    background: var(--accent-dim);
}

.nav-btn-ghost {
    border-color: var(--border);
}

/* ---------- Toolkit layout ---------- */
.toolkit-layout {
    flex: 1;
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 0;
    align-items: stretch;
    min-height: 0;
}

.module-sidebar {
    border-right: 1px solid var(--border);
    background: rgba(16, 22, 25, 0.72);
    padding: 1.15rem 0.85rem 2rem;
    position: sticky;
    top: var(--header-h);
    align-self: start;
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
}

.sidebar-label {
    margin: 0 0.55rem 0.65rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    color: var(--text-dim);
}

.module-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.module-nav-btn {
    appearance: none;
    width: 100%;
    text-align: left;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    padding: 0.7rem 0.75rem;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.module-nav-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.module-nav-btn.is-active {
    background: var(--accent-dim);
    border-color: var(--border-accent);
    color: var(--text-primary);
}

.module-nav-title {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: inherit;
}

.module-nav-btn.is-active .module-nav-title {
    color: var(--accent);
}

.module-nav-desc {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.active-module-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: var(--accent-secondary);
    background: var(--accent-secondary-dim);
}

.module-panel[hidden] {
    display: none !important;
}

.module-panel.is-active {
    display: block;
    animation: fade-in 0.3s ease;
}

.module-toolbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.module-heading {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.module-tagline {
    margin: 0.2rem 0 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.module-local-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.mode-control-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

.algo-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem 1.25rem;
}

.btn-sm {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    padding: 0.35rem 0.55rem;
    cursor: pointer;
}

.btn-sm:hover:not(:disabled) {
    background: rgba(57, 255, 136, 0.18);
}

.btn-sm:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.hash-results {
    display: grid;
    gap: 0.65rem;
    min-height: 4rem;
}

.hash-result-row {
    display: grid;
    grid-template-columns: 90px 1fr auto;
    gap: 0.65rem;
    align-items: start;
    padding: 0.7rem 0.8rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.hash-result-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--accent-secondary);
    padding-top: 0.15rem;
}

.hash-result-value {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-primary);
    word-break: break-all;
}

.sig-matches {
    display: grid;
    gap: 0.65rem;
    min-height: 3rem;
}

.sig-match-card {
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--border-accent);
    background: var(--accent-dim);
    border-radius: var(--radius-sm);
}

.sig-match-name {
    margin: 0 0 0.55rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    color: var(--accent);
}

.sig-match-meta {
    margin: 0;
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 0.35rem 0.65rem;
}

.sig-match-meta dt {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.sig-match-meta dd {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
    word-break: break-word;
}

.sig-no-match {
    padding: 1rem;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--warning);
    text-align: center;
}

/* ---------- Main ---------- */
.main-content {
    flex: 1;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.4rem 1.25rem 2.5rem;
    animation: fade-in 0.35s ease;
}

.toolkit-main {
    max-width: none;
    margin: 0;
    min-width: 0;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.notice-banner {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.15rem;
    border: 1px solid rgba(255, 204, 102, 0.28);
    background: var(--warning-dim);
    border-radius: var(--radius);
}

.notice-banner p {
    margin: 0;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.notice-label {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--warning);
    padding-top: 0.15rem;
}

/* Mode tabs */
.mode-control {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
    padding: 0.35rem;
    margin-bottom: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.mode-tab {
    appearance: none;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    padding: 0.7rem 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.mode-tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.mode-tab.is-active {
    color: #04140c;
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 600;
}

.mode-panel[hidden] {
    display: none !important;
}

.mode-panel.is-active {
    display: block;
}

/* Workspace */
.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.15rem;
    align-items: start;
}

.workspace-col {
    min-width: 0;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.85rem 1.1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.panel-title {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--accent);
}

.panel-meta {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

.panel-body {
    padding: 1.1rem;
}

.section-label {
    margin: 0 0 0.65rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    color: var(--accent-secondary);
}

/* Drop zone */
.drop-zone {
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius);
    background:
        linear-gradient(180deg, rgba(23, 31, 35, 0.65), rgba(16, 22, 25, 0.9));
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.drop-zone:hover,
.drop-zone:focus-visible {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.drop-zone.is-dragover {
    border-color: var(--accent-secondary);
    background: var(--accent-secondary-dim);
    box-shadow: inset 0 0 0 1px rgba(0, 217, 255, 0.25);
}

.drop-zone-inner {
    text-align: center;
    padding: 1.5rem 1rem;
}

.drop-icon {
    color: var(--accent);
    margin-bottom: 0.75rem;
    opacity: 0.9;
}

.drop-title {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    font-weight: 600;
}

.drop-or {
    margin: 0.45rem 0 0.7rem;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.drop-hint {
    margin: 0.9rem 0 0;
    color: var(--text-secondary);
    font-size: 0.82rem;
}

/* File info */
.file-info-panel {
    margin-top: 1.15rem;
    animation: fade-in 0.3s ease;
}

.meta-grid {
    margin: 0;
    display: grid;
    gap: 0.65rem;
}

.meta-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 0.5rem;
    padding: 0.55rem 0.7rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.meta-item dt {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    text-transform: uppercase;
    align-self: center;
}

.meta-item dd {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-primary);
    word-break: break-all;
}

/* Hash */
.hash-block {
    margin-top: 1rem;
    padding: 0.85rem;
    border: 1px solid var(--border-accent);
    background: var(--accent-dim);
    border-radius: var(--radius);
}

.hash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.hash-header .section-label {
    margin: 0;
    color: var(--accent);
}

.hash-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--text-primary);
    word-break: break-all;
    white-space: pre-wrap;
}

.hash-value.is-pending {
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    padding: 0.65rem 1rem;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform 100ms ease;
}

.btn:active:not(:disabled) {
    transform: translateY(1px);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    color: #04140c;
    border-color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
    background: #5cff9e;
    border-color: #5cff9e;
}

.btn-secondary {
    background: var(--accent-secondary-dim);
    color: var(--accent-secondary);
    border-color: rgba(0, 217, 255, 0.35);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(0, 217, 255, 0.2);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
    border-color: var(--border-strong);
    background: var(--bg-hover);
}

.btn-tiny {
    padding: 0.3rem 0.55rem;
    font-size: 0.65rem;
    background: transparent;
    color: var(--accent);
    border-color: var(--border-accent);
}

.btn-tiny:hover:not(:disabled) {
    background: rgba(57, 255, 136, 0.18);
}

.btn.is-copied {
    color: #04140c !important;
    background: var(--accent) !important;
    border-color: var(--accent) !important;
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1rem;
}

/* Alerts */
.alert {
    margin-top: 1rem;
    padding: 0.8rem 0.95rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    border: 1px solid transparent;
}

.alert strong {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.3rem;
}

.alert-warning {
    background: var(--warning-dim);
    border-color: rgba(255, 204, 102, 0.3);
    color: var(--text-primary);
}

.alert-warning strong {
    color: var(--warning);
}

.alert-danger {
    background: var(--danger-dim);
    border-color: rgba(255, 92, 92, 0.3);
    color: var(--text-primary);
}

.alert-danger strong {
    color: var(--danger);
}

.alert-info {
    background: var(--info-dim);
    border-color: rgba(0, 217, 255, 0.3);
    color: var(--text-primary);
}

.alert-info strong {
    color: var(--info);
}

.alert-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 0.35rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.alert-meta code {
    color: var(--text-primary);
}

/* Progress */
.progress-block {
    margin-bottom: 1rem;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--accent-secondary);
    margin-bottom: 0.4rem;
}

.progress-track {
    height: 10px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    transition: width 120ms linear;
}

/* Output controls */
.output-controls {
    margin-bottom: 1rem;
}

.stat-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
    margin-bottom: 0.85rem;
}

.stat {
    padding: 0.65rem 0.75rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.stat-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.2rem;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent);
}

.toggle-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 0.25rem;
}

.toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.toggle input {
    accent-color: var(--accent);
    width: 1rem;
    height: 1rem;
}

/* Code panels */
.code-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #0a0e10;
}

.code-panel-header {
    padding: 0.45rem 0.75rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.code-area {
    display: block;
    width: 100%;
    min-height: 280px;
    max-height: 480px;
    resize: vertical;
    border: 0;
    padding: 0.85rem;
    background: transparent;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.5;
    white-space: pre;
    overflow: auto;
}

.code-area::placeholder {
    color: var(--text-dim);
}

.code-area:focus {
    outline: none;
}

.code-area.code-area-input {
    color: var(--text-primary);
    min-height: 320px;
}

.code-area.is-wrap {
    white-space: pre-wrap;
    word-break: break-all;
}

/* Form fields */
.field-group {
    margin-top: 1.1rem;
}

.field-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
}

.text-input {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-elevated);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.88rem;
}

.text-input:focus {
    border-color: var(--accent);
}

.field-hint {
    margin: 0.4rem 0 0;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.field-hint code {
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    margin-top: auto;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.25rem 1.25rem 1.5rem;
    display: grid;
    gap: 0.55rem;
}

.footer-brand {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    align-items: baseline;
}

.footer-brand strong {
    font-family: var(--font-mono);
    letter-spacing: 0.12em;
    font-size: 0.85rem;
    color: var(--accent);
}

.footer-brand span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-privacy {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    max-width: 52rem;
}

.footer-version {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
}

/* Modal */
.modal[hidden] {
    display: none !important;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(3px);
}

.modal-panel {
    position: relative;
    width: min(540px, 100%);
    max-height: min(88vh, 720px);
    overflow: auto;
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    animation: fade-in 0.25s ease;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.15rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
}

.modal-header h2 {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    color: var(--accent);
}

.modal-close {
    appearance: none;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-sm);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.modal-body {
    padding: 1.15rem 1.25rem 1.4rem;
}

.modal-body h3 {
    margin: 1.25rem 0 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--accent-secondary);
}

.modal-body p {
    margin: 0;
    color: var(--text-secondary);
}

.modal-body .emphasis {
    color: var(--warning);
    font-weight: 500;
}

.feature-list {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--text-secondary);
}

.feature-list li {
    margin: 0.2rem 0;
}

.modal-version {
    margin-top: 1.25rem !important;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-dim) !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .toolkit-layout {
        grid-template-columns: 1fr;
    }

    .module-sidebar {
        position: static;
        max-height: none;
        border-right: 0;
        border-bottom: 1px solid var(--border);
        padding-bottom: 1rem;
    }

    .module-nav {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 0.4rem;
    }
}

@media (max-width: 960px) {
    .workspace {
        grid-template-columns: 1fr;
    }

    .meta-item {
        grid-template-columns: 100px 1fr;
    }

    .hash-result-row {
        grid-template-columns: 1fr;
    }

    .mode-control-3 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .header-inner {
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
    }

    .main-nav {
        width: 100%;
    }

    .nav-btn {
        flex: 1;
        text-align: center;
        font-size: 0.8rem;
        padding: 0.5rem 0.4rem;
    }

    .status-pill,
    .active-module-chip {
        width: 100%;
        justify-content: center;
    }

    .mode-tab {
        font-size: 0.68rem;
        padding: 0.65rem 0.4rem;
        letter-spacing: 0.04em;
    }

    .stat-row {
        grid-template-columns: 1fr;
    }

    .meta-item {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }

    .code-area,
    .code-area.code-area-input {
        min-height: 220px;
        max-height: 360px;
        font-size: 0.72rem;
    }

    .action-row .btn {
        flex: 1 1 auto;
    }

    .brand-name {
        font-size: 1.15rem;
    }

    .brand-subtitle {
        font-size: 0.62rem;
        letter-spacing: 0.08em;
    }
}

@media (max-width: 420px) {
    .main-content {
        padding: 1rem 0.85rem 2rem;
    }

    .panel-body {
        padding: 0.9rem;
    }

    .notice-banner {
        flex-direction: column;
        gap: 0.35rem;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .status-dot {
        animation: none;
    }
}