/* ══════════════════════════════════════════════════════════════
   CIPHER — Cryptanalysis Suite
   Black & white, minimal, sleek.
   ══════════════════════════════════════════════════════════════ */

:root {
    --bg:           #0a0a0a;
    --bg-elevated:  #111111;
    --bg-surface:   #161616;
    --bg-hover:     #1c1c1c;
    --border:       #222222;
    --border-light: #2a2a2a;
    --text:         #e8e8e8;
    --text-dim:     #777777;
    --text-muted:   #444444;
    --accent:       #ffffff;
    --accent-dim:   #999999;
    --green:        #4ade80;
    --red:          #f87171;
    --yellow:       #fbbf24;
    --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:    'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;
    --radius:       8px;
    --radius-lg:    12px;
    --transition:   150ms cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(255, 255, 255, 0.15);
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}


/* ── App Layout ─────────────────────────────────────────────── */

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}


/* ── Header ─────────────────────────────────────────────────── */

.header {
    padding: 16px 0 12px;
    border-bottom: 1px solid var(--border);
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--accent);
}


/* ── Input Section ──────────────────────────────────────────── */

.input-section {
    padding: 16px 0;
}

textarea {
    width: 100%;
    height: 90px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    padding: 12px 16px;
    resize: vertical;
    outline: none;
    transition: border-color var(--transition);
}

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

textarea:focus {
    border-color: var(--border-light);
}


/* ── Cipher Tabs ────────────────────────────────────────────── */

.cipher-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding-bottom: 24px;
}

.tabs-container {
    position: relative;
    border-bottom: 1px solid var(--border);
}

.tabs-scroll {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.tabs-scroll::-webkit-scrollbar {
    height: 3px;
}

.tabs-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.tabs-scroll::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.tabs-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

.tab {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    flex-shrink: 0;
}

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

.tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-indicator {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: all var(--transition);
}

.tab-indicator.idle {
    background: none;
    border: 1px solid var(--text-muted);
}

.tab-indicator.running {
    background: var(--green);
    border: none;
    box-shadow: 0 0 6px rgba(74, 222, 128, 0.5);
    animation: pulse 1.5s infinite;
}

.tab-indicator.done {
    background: var(--accent);
    border: none;
}

.tab-indicator.error {
    background: var(--red);
    border: none;
}


/* ── Tab Content ────────────────────────────────────────────── */

.tab-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding-top: 16px;
}

.cipher-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.cipher-panel.active {
    display: flex;
}


/* ── Panel Header ───────────────────────────────────────────── */

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.panel-title {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}

.panel-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    outline: none;
}

.btn-run {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

.btn-run:hover {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
}

.btn-run:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-run.running {
    background: none;
    color: var(--red);
    border-color: var(--red);
}

.btn-run.running:hover {
    background: rgba(248, 113, 113, 0.1);
}

.btn-secondary {
    background: none;
    color: var(--text-dim);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    color: var(--text);
    border-color: var(--border-light);
}

.panel-status {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
}


/* ── Terminal Output ────────────────────────────────────────── */

.terminal {
    flex: 1;
    min-height: 200px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.terminal-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
}

.terminal-line {
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-dim);
    animation: lineIn 0.15s ease-out;
}

.terminal-line.highlight {
    color: var(--accent);
}

.terminal-line.success {
    color: var(--green);
}

.terminal-line.error-line {
    color: var(--red);
}

.terminal-line.info {
    color: var(--text-muted);
}

.terminal-cursor {
    display: inline-block;
    width: 7px;
    height: 14px;
    background: var(--accent);
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
    margin-left: 2px;
    opacity: 0.6;
}

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes lineIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ── Responsive ─────────────────────────────────────────────── */

@media (max-width: 768px) {
    .app {
        padding: 0 16px;
    }

    .tab {
        padding: 8px 12px;
        font-size: 11px;
    }
}


/* ── Input Controls ────────────────────────────────────────── */

.input-controls {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
    flex-wrap: wrap;
}


/* ── Modal Dialog ───────────────────────────────────────────── */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    transition: opacity 200ms ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    animation: modalSlide 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlide {
    from {
        transform: translateY(10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    transition: color var(--transition);
}

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

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.multi-select-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    cursor: pointer;
    padding: 4px 0;
    letter-spacing: 0.5px;
    transition: color var(--transition);
}

.btn-link:hover {
    color: var(--text);
    text-decoration: underline;
}

.divider {
    color: var(--border-light);
    font-size: 10px;
}

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

.cipher-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 12px;
    transition: all var(--transition);
    user-select: none;
}

.cipher-checkbox-label:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.cipher-checkbox-label input {
    display: none;
}

.custom-checkbox {
    width: 14px;
    height: 14px;
    border: 1px solid var(--text-muted);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
}

.cipher-checkbox-label input:checked + .custom-checkbox {
    background-color: var(--accent);
    border-color: var(--accent);
}

.cipher-checkbox-label input:checked + .custom-checkbox::after {
    content: '';
    width: 4px;
    height: 8px;
    border: solid var(--bg);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
}

.challenge-choice {
    padding: 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 12px;
    transition: all var(--transition);
}

.challenge-choice:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.challenge-choice.large {
    font-size: 13px;
    padding: 16px;
}

.progress-track {
    height: 5px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 999px;
    margin-bottom: 12px;
    overflow: hidden;
}

.progress-fill {
    width: 0;
    height: 100%;
    background: var(--accent);
    border-radius: inherit;
    transition: width 120ms linear;
}

.progress-fill.indeterminate {
    animation: progressSweep 1s ease-in-out infinite;
}

@keyframes progressSweep {
    0% {
        transform: translateX(-120%);
    }
    100% {
        transform: translateX(260%);
    }
}


/* ── Mobile & Scroll improvements ────────────────────────────── */

.tabs-scroll {
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 500px) {
    .ciphers-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        max-height: 95%;
    }
    
    .modal-body {
        padding: 16px;
    }
}

/* ── Added Top-Level Tabs and Analysis UI ──────────────────────────────────── */

.main-tabs {
    display: flex;
    gap: 10px;
    padding: 16px 0 18px;
    border-bottom: 1px solid var(--border);
}

.main-tab {
    position: relative;
    padding: 12px 18px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: all var(--transition);
}

.main-tab:hover {
    color: var(--text);
    border-color: var(--border-light);
    transform: translateY(-1px);
}

.main-tab.active {
    color: var(--bg);
    background: var(--accent);
    border-color: var(--accent);
}

.main-panel {
    display: none;
    flex: 1;
    min-height: 0;
}

.main-panel.active {
    display: flex;
    flex-direction: column;
}

.analysis-shell,
.manuals-shell {
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding-top: 18px;
    min-height: 0;
}

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    padding: 18px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015)),
        var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.analysis-copy {
    max-width: 62ch;
    margin-top: 6px;
    color: var(--text-dim);
    font-size: 13px;
}

.analysis-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.analysis-summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.analysis-card,
.analysis-rule,
.manuals-placeholder,
.analysis-empty {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.analysis-card {
    padding: 16px;
}

.analysis-card-label,
.analysis-rule-kind,
.analysis-rule-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.analysis-card-value {
    margin-top: 8px;
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
}

.analysis-card-subtle {
    margin-top: 6px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.6;
    word-break: break-word;
}

.analysis-results {
    display: grid;
    gap: 14px;
    min-height: 0;
}

.analysis-empty,
.analysis-loading {
    padding: 18px;
    color: var(--text-dim);
}

.analysis-empty-soft {
    color: var(--text-muted);
}

.analysis-card-warning {
    border-color: rgba(248, 113, 113, 0.45);
    background: rgba(248, 113, 113, 0.08);
}

.analysis-rule {
    padding: 18px;
    display: grid;
    gap: 14px;
    animation: lineIn 0.18s ease-out;
}

.analysis-rule-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

.analysis-rule h3 {
    margin-top: 4px;
    font-size: 18px;
    line-height: 1.2;
    color: var(--text);
}

.analysis-rule-score {
    min-width: 72px;
    padding: 8px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 600;
    text-align: center;
}

.analysis-rule-meta,
.analysis-rule-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.analysis-rule-meta span,
.analysis-rule-tags span {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.analysis-rule-body {
    display: grid;
    gap: 8px;
    color: var(--text-dim);
}

.analysis-rule-body p {
    line-height: 1.7;
}

.analysis-rule-examples {
    display: grid;
    gap: 8px;
}

.analysis-example-list {
    display: grid;
    gap: 8px;
}

.analysis-example-list code {
    display: block;
    padding: 10px 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: var(--font-mono);
    font-size: 11px;
}

.manuals-placeholder {
    padding: 24px;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .main-tabs {
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 14px;
    }

    .main-tab {
        padding: 10px 14px;
        font-size: 11px;
    }

    .analysis-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .analysis-summary {
        grid-template-columns: 1fr 1fr;
    }
}

/* Top-level tabs and nested analysis panes */
.input-fixed {
    position: sticky;
    top: 0;
    z-index: 20;
    padding-top: 16px;
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.98), rgba(10, 10, 10, 0.92));
    backdrop-filter: blur(10px);
}

.main-tabs {
    justify-content: space-between;
    gap: 14px;
    padding: 14px 0 18px;
}

.main-tab {
    flex: 1;
    padding: 16px 20px;
    font-size: 13px;
    letter-spacing: 1.2px;
}

.subtabs-container {
    padding-top: 10px;
}

.subtabs-scroll {
    gap: 10px;
}

.analysis-tab {
    min-width: 170px;
    justify-content: center;
}

.analysis-tab.active {
    color: var(--bg);
    background: var(--accent);
    border-color: var(--accent);
}

.analysis-pane-group {
    display: flex;
    flex-direction: column;
    min-height: 0;
    gap: 14px;
}

.analysis-pane {
    display: none;
    flex-direction: column;
    gap: 14px;
    min-height: 0;
}

.analysis-pane.active {
    display: flex;
}

.analysis-summary {
    grid-template-columns: minmax(220px, 320px);
}

.analysis-summary-card {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg-surface);
    color: var(--text-dim);
}

/* Tab skin reset: match solver subtabs everywhere */
.main-tabs {
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    padding: 6px 0 0;
}

.main-tab {
    flex: 1;
    margin-bottom: -1px;
    padding: 10px 14px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: none;
    color: var(--text-muted);
}

.main-tab:hover {
    background: var(--bg-hover);
    color: var(--text-dim);
    transform: none;
}

.main-tab.active {
    background: none;
    color: var(--text);
    border-bottom-color: var(--accent);
}

.subtabs-container {
    padding-top: 0;
}

.subtabs-scroll {
    gap: 6px;
    border-bottom: 1px solid var(--border);
}

.analysis-tab {
    min-width: 0;
    flex: 1;
    justify-content: flex-start;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    margin-bottom: -1px;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: none;
    color: var(--text-muted);
}

.analysis-tab:hover {
    background: var(--bg-hover);
    color: var(--text-dim);
}

.analysis-tab.active {
    background: none;
    color: var(--text);
    border-bottom-color: var(--accent);
}

.analysis-pattern-controls {
    justify-content: flex-start;
}

.main-tabs {
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.main-panel#solverPanel .cipher-section {
    padding-top: 8px;
}

.main-panel#solverPanel .tabs-container {
    margin-top: 4px;
}

.main-panel#solverPanel .tabs-scroll {
    padding-top: 4px;
}

.main-panel#solverPanel .tab-content {
    padding-top: 14px;
}

.footer {
    margin-top: auto;
    padding: 18px 0 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

@media (max-width: 768px) {
    .footer {
        flex-direction: column;
        align-items: flex-start;
    }
}