/**
 * OpenLink Remote Desktop - Styles
 * Accessible, high-contrast design
 */

/* CSS Variables */
:root {
    --color-primary: #0066cc;
    --color-primary-hover: #0052a3;
    --color-secondary: #666;
    --color-danger: #cc3333;
    --color-danger-hover: #aa2222;
    --color-success: #22aa44;
    --color-warning: #cc8800;

    --color-bg: #1a1a2e;
    --color-bg-light: #16213e;
    --color-surface: #0f3460;
    --color-surface-hover: #1a4980;

    --color-text: #e0e0e0;
    --color-text-muted: #999;
    --color-text-heading: #ffffff;

    --color-border: #333;
    --color-focus: #4da6ff;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;

    --border-radius: 8px;
    --border-radius-lg: 12px;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* High Contrast Mode */
@media (prefers-contrast: more) {
    :root {
        --color-bg: #000;
        --color-surface: #111;
        --color-text: #fff;
        --color-border: #fff;
    }
}

/* Reduce Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

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

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
}

/* Screen Reader Only */
.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;
}

/* Focus Styles */
:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem 2rem;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 9999;
}

.skip-link:focus {
    top: 1rem;
}

/* Screens */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-heading);
    display: block;
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-primary);
    display: block;
}

.tagline {
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

/* Connection Panel */
.connection-panel {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
}

.panel-section {
    text-align: center;
}

.panel-section h3 {
    font-size: 1.25rem;
    color: var(--color-text-heading);
    margin: 0 0 0.5rem;
}

.panel-section p {
    color: var(--color-text-muted);
    margin: 0 0 1rem;
}

.divider {
    display: flex;
    align-items: center;
    margin: 2rem 0;
    color: var(--color-text-muted);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.divider span {
    padding: 0 1rem;
}

.description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.75rem;
}

.installer-panel {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.installer-panel h3 {
    margin: 0 0 0.5rem;
    color: var(--color-text-heading);
    font-size: 1.125rem;
}

.installer-panel p {
    margin: 0 0 1rem;
    color: var(--color-text-muted);
}

.installer-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.settings-panel fieldset + fieldset {
    margin-top: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background: #555;
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-icon {
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.btn-icon:hover {
    background: var(--color-surface-hover);
}

/* Input Group */
.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input {
    flex: 1;
}

input[type="text"],
input[type="url"],
select {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

input[type="text"]:focus,
input[type="url"]:focus,
select:focus {
    border-color: var(--color-focus);
}

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

/* Settings Panel */
.settings-panel {
    margin-top: 2rem;
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.settings-panel summary {
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.settings-panel summary:hover {
    background: var(--color-surface-hover);
}

.settings-panel[open] summary {
    border-bottom: 1px solid var(--color-border);
}

.settings-content {
    padding: 1.5rem;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0 0 1.5rem;
}

fieldset:last-child {
    margin-bottom: 0;
}

legend {
    font-weight: 600;
    color: var(--color-text-heading);
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.setting-row:last-child {
    margin-bottom: 0;
}

.setting-row label {
    flex: 1;
}

.setting-row select,
.setting-row input[type="url"] {
    width: 200px;
}

input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--color-primary);
}

/* Host Screen */
.session-info {
    text-align: center;
    margin-bottom: 2rem;
}

.session-info h2 {
    font-size: 1rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.code-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.session-code {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    background: var(--color-surface);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
}

.status-info {
    text-align: center;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    margin-bottom: 2rem;
}

.client-list {
    margin-top: 1rem;
}

.client-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
}

.client-item .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
}

.host-controls {
    text-align: center;
}

/* Agent Assistant */
.agent-assist {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    margin: 1rem 0 2rem;
    padding: 1rem;
}

.agent-assist-header {
    margin-bottom: 0.75rem;
}

.agent-assist-header h2 {
    color: var(--color-text-heading);
    font-size: 1.125rem;
    margin: 0 0 0.25rem;
}

.agent-assist-status {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin: 0;
}

.agent-machine-id {
    align-items: center;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    padding: 0.625rem 0.75rem;
}

.agent-machine-id span {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.agent-machine-id code {
    color: var(--color-text-heading);
    font-family: var(--font-mono);
    overflow-wrap: anywhere;
}

.agent-assist-form {
    display: grid;
    gap: 0.625rem;
    grid-template-columns: minmax(7rem, auto) minmax(0, 1fr);
}

.agent-assist-form label {
    align-self: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.agent-assist-form input,
.agent-assist-form select,
.agent-assist-form textarea {
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font: inherit;
    min-width: 0;
    padding: 0.625rem 0.75rem;
}

.agent-assist-form textarea {
    min-height: 3rem;
    resize: vertical;
}

.agent-assist-form button {
    grid-column: 2;
    justify-self: start;
}

.agent-assist-log {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-top: 0.75rem;
    min-height: 1.25rem;
}

.agent-assist-log p {
    margin: 0.25rem 0 0;
}

.remote-agent-assist {
    flex-shrink: 0;
    margin: 0;
    max-height: 16rem;
    overflow: auto;
}

/* Session Chat */
.session-chat {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    margin: 1rem 0 2rem;
    padding: 1rem;
}

.session-chat-header {
    margin-bottom: 0.75rem;
}

.session-chat-header h2 {
    color: var(--color-text-heading);
    font-size: 1.125rem;
    margin: 0 0 0.25rem;
}

.session-chat-status {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin: 0;
}

.session-chat-log {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    min-height: 8rem;
    max-height: 16rem;
    overflow-y: auto;
    padding: 0.75rem;
}

.session-chat-message {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: 0.625rem;
    padding: 0.625rem 0.75rem;
}

.session-chat-message:last-child {
    margin-bottom: 0;
}

.session-chat-message.outgoing {
    border-color: var(--color-primary);
}

.session-chat-message.incoming {
    border-color: var(--color-success);
}

.session-chat-sender {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.session-chat-body {
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.session-chat-body a {
    color: var(--color-focus);
}

.session-chat-compose {
    align-items: stretch;
    display: grid;
    gap: 0.75rem;
    grid-template-columns: minmax(0, 1fr) auto;
    margin-top: 0.75rem;
}

.session-chat-compose textarea {
    background: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font: inherit;
    min-height: 3rem;
    padding: 0.75rem 1rem;
    resize: vertical;
}

.session-chat-compose textarea:focus {
    border-color: var(--color-focus);
}

.remote-session-chat {
    flex-shrink: 0;
    margin: 0;
    max-height: 18rem;
    overflow: hidden;
}

/* Remote Screen */
.remote-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: #000;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.machine-status-text {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.status-indicator .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-success);
}

.status-indicator.disconnected .dot {
    background: var(--color-danger);
}

.status-indicator.connecting .dot {
    background: var(--color-warning);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.btn-toolbar {
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    transition: all var(--transition-fast);
}

.btn-toolbar:hover {
    background: var(--color-surface);
}

.btn-toolbar[aria-pressed="true"] {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.remote-download-link {
    font-size: 0.875rem;
    text-decoration: none;
    white-space: nowrap;
}

@media (max-width: 720px) {
    .toolbar {
        align-items: stretch;
        flex-direction: column;
        gap: 0.5rem;
    }

    .toolbar-left,
    .toolbar-center,
    .toolbar-right {
        justify-content: center;
        flex-wrap: wrap;
    }

    .machine-status-text {
        width: 100%;
        text-align: center;
    }
}

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

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

/* Video Container */
.video-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

#remote-video {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.video-container.fit-to-window #remote-video {
    width: 100%;
    height: 100%;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 1.25rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1000;
}

.modal[hidden] {
    display: none;
}

.modal-content {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    max-width: 400px;
    text-align: center;
}

.modal-content h2 {
    margin: 0 0 1rem;
    color: var(--color-text-heading);
}

.modal-content p {
    margin: 0 0 1.5rem;
    color: var(--color-text);
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }

    .connection-panel {
        padding: 1.5rem;
    }

    .logo {
        font-size: 2rem;
    }

    .session-code {
        font-size: 1.75rem;
        padding: 0.75rem 1.5rem;
    }

    .input-group {
        flex-direction: column;
    }

    .setting-row {
        flex-wrap: wrap;
    }

    .setting-row select,
    .setting-row input[type="url"] {
        width: 100%;
    }

    .session-chat-compose {
        grid-template-columns: 1fr;
    }

    .agent-assist-form {
        grid-template-columns: 1fr;
    }

    .agent-assist-form button {
        grid-column: 1;
    }

    .remote-session-chat {
        max-height: none;
    }
}

/* Print */
@media print {
    .screen:not(.active),
    .btn,
    .toolbar,
    .settings-panel {
        display: none;
    }
}