/* InvisibleVM Browser Frontend */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --accent: #4a9eff;
    --accent-hover: #6ab4ff;
    --success: #4caf50;
    --danger: #f44336;
    --border: #2a2a3e;
    --terminal-bg: #000;
    --terminal-text: #00ff00;
}

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

.hidden {
    display: none !important;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.app-header h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
}

.subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

.app-main {
    display: grid;
    grid-template-columns: 1fr 360px;
    flex: 1;
    overflow: hidden;
}

.vm-display-area {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    padding: 16px;
}

.display-container {
    position: relative;
    width: 800px;
    height: 600px;
}

.vm-canvas {
    width: 100%;
    height: 100%;
    background: #111;
    border: 1px solid var(--border);
    border-radius: 4px;
}

.display-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 14px;
    pointer-events: none;
}

.vm-sidebar {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    overflow: hidden;
}

.vm-controls {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.vm-controls h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.control-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.btn {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-start {
    background: var(--success);
    color: white;
}

.btn-start:hover:not(:disabled) {
    background: #5cbf60;
}

.btn-stop {
    background: var(--danger);
    color: white;
}

.btn-stop:hover:not(:disabled) {
    background: #f55a4e;
}

.btn-demo {
    background: var(--accent);
    color: white;
}

.btn-demo:hover:not(:disabled) {
    background: var(--accent-hover);
}

.vm-stats {
    font-size: 13px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-value {
    color: var(--text-primary);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.status-running {
    color: var(--success);
    font-weight: 500;
}

.status-stopped {
    color: var(--text-secondary);
}

/* File upload */
.file-upload {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.file-upload-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border: 1px dashed var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.file-upload-label:hover {
    border-color: var(--accent);
    background: rgba(74, 158, 255, 0.05);
}

.file-input {
    display: none;
}

.file-upload-text {
    font-size: 13px;
    color: var(--text-secondary);
}

.file-info {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
}

.file-name {
    color: var(--accent);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
}

.file-size {
    color: var(--text-secondary);
    flex-shrink: 0;
    margin-left: 8px;
}

/* Disk upload */
.disk-upload {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.disk-upload h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.disk-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.disk-name {
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.disk-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.disk-size {
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-remove {
    padding: 2px 8px;
    font-size: 11px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 3px;
    cursor: pointer;
}

.btn-remove:hover {
    color: var(--danger);
    border-color: var(--danger);
}

/* Network relay */
.relay-panel {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.relay-panel h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.relay-url-row {
    margin-bottom: 8px;
}

.relay-url-input {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
}

.relay-url-input:focus {
    outline: none;
    border-color: var(--accent);
}

.relay-url-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-relay-connect {
    padding: 5px 14px;
    font-size: 12px;
    background: var(--success);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-relay-connect:hover:not(:disabled) {
    background: #5cbf60;
}

.btn-relay-connect:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-relay-disconnect {
    padding: 5px 14px;
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-relay-disconnect:hover:not(:disabled) {
    color: var(--danger);
    border-color: var(--danger);
}

.btn-relay-disconnect:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.relay-status {
    font-size: 12px;
    font-weight: 500;
    margin-left: auto;
}

.relay-disconnected {
    color: var(--text-secondary);
}

.relay-connecting {
    color: #ffa726;
}

.relay-connected {
    color: var(--success);
}

.relay-error {
    color: var(--danger);
}

.relay-stats {
    font-size: 12px;
}

.relay-stats .stat-row {
    display: flex;
    justify-content: space-between;
}

/* Model upload */
.model-upload {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.model-upload h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.model-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.model-name {
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.model-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.model-size {
    font-size: 12px;
    color: var(--text-secondary);
}

.terminal-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.terminal-header {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.terminal-output {
    flex: 1;
    padding: 12px;
    background: var(--terminal-bg);
    color: var(--terminal-text);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 13px;
    line-height: 1.5;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.app-footer {
    padding: 8px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
}

/* ── Performance Dashboard ─────────────────────────────────── */

.perf-dashboard {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.perf-dashboard h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.perf-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.perf-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.perf-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.perf-value {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 13px;
    color: var(--text-primary);
}

.perf-active {
    color: var(--success);
}

.perf-warn {
    color: #ffa726;
}

.perf-zero {
    color: var(--text-secondary);
    opacity: 0.6;
}

.perf-arch {
    color: var(--accent);
    font-weight: 500;
}

.perf-uptime {
    font-variant-numeric: tabular-nums;
}

/* ── Debug Panel Wrapper ───────────────────────────────────── */

.debug-panel-wrapper {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.debug-panel-toggle {
    padding: 8px 24px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}

.debug-panel-toggle:hover {
    color: var(--text-primary);
}

.debug-toggle-icon {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 12px;
}

.debug-panel-content {
    padding: 0 24px 16px 24px;
    max-height: 500px;
    overflow-y: auto;
}

/* ── Debug Inspector ───────────────────────────────────────── */

.debug-inspector {
    padding: 0;
}

.debug-inspector h3 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.debug-arch-badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(74, 158, 255, 0.1);
    border: 1px solid rgba(74, 158, 255, 0.25);
    border-radius: 4px;
    margin-bottom: 12px;
}

.debug-special-regs {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.debug-reg-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 2px 0;
}

.debug-reg-name {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 12px;
    color: var(--accent);
    min-width: 48px;
    text-align: right;
    flex-shrink: 0;
}

.debug-reg-value {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 12px;
    color: var(--text-primary);
}

.debug-val-active {
    color: var(--success);
}

.debug-val-zero {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ── Collapsible Sections ──────────────────────────────────── */

.debug-section {
    margin-bottom: 8px;
}

.debug-section-header {
    padding: 6px 0;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}

.debug-section-header:hover {
    color: var(--text-primary);
}

.debug-collapse-icon {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 11px;
}

.debug-mem-addr {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 400;
}

.debug-section-body {
    padding-top: 4px;
}

/* ── Register Grid ─────────────────────────────────────────── */

.register-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 16px;
}

/* ── Memory Hex Dump ───────────────────────────────────────── */

.memory-dump {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 11px;
    line-height: 1.6;
    color: var(--terminal-text);
    background: var(--terminal-bg);
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
    overflow-x: auto;
    white-space: pre;
    margin: 0;
}

/* ── NeuralFS File Explorer ───────────────────────────────── */

.neuralfs-explorer {
    margin-top: 12px;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
}

.neuralfs-header {
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    user-select: none;
    display: flex;
    align-items: center;
    gap: 4px;
}

.neuralfs-badge {
    margin-left: auto;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--surface);
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
}

.neuralfs-body {
    margin-top: 8px;
}

.neuralfs-empty {
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
    padding: 8px 0;
}

.neuralfs-file-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.neuralfs-file-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    background: var(--surface);
}

.neuralfs-file-row:hover {
    background: var(--border);
}

.neuralfs-file-name {
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
}

.neuralfs-file-size {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    margin-left: 8px;
}

.neuralfs-total {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: right;
    padding-top: 4px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
}