@font-face {
    font-family: "Iosevka";
    src: url("../iosevka-bold-1.ttf") format("truetype");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

:root {
    --base: #1e1e2e;
    --mantle: #181825;
    --crust: #11111b;
    --surface0: #313244;
    --surface1: #45475a;
    --overlay0: #6c7086;
    --subtext0: #a6adc8;
    --text: #cdd6f4;
    --orange: #e67e22;
    --orange-hover: #d35400;
    --orange-light: #ffd6c2;
    --green: #a6e3a1;
    --red: #f38ba8;
    --editor-bg: #282c34;
    --editor-border: #3e4452;
    --radius: 8px;
    --radius-sm: 6px;
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--base);
    color: var(--text);
    overflow: hidden;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed; inset: 0; z-index: 9999;
    background: var(--crust);
    display: flex;
    align-items: center; justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}
#loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
#loading-bar-container { width: 320px; text-align: center; }
#loading-bar-track {
    height: 4px;
    background: var(--surface0);
    border-radius: 2px;
    overflow: hidden;
}
#loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--orange) 0%, var(--orange-light) 50%, var(--orange) 100%);
    background-size: 200% auto;
    border-radius: 2px;
    transition: width 0.3s ease;
    animation: shimmer 2s linear infinite;
}
@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}
#loading-text {
    margin-top: 16px;
    color: var(--subtext0);
    font-size: 14px;
    font-weight: 500;
}
#loading-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* App Layout */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    opacity: 0;
    transition: opacity 0.4s ease;
}
#app.ready { opacity: 1; }

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 52px;
    background: var(--mantle);
    border-bottom: 1px solid var(--surface0);
    flex-shrink: 0;
    gap: 16px;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}
.header-left .brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    flex-shrink: 0;
}
.header-left .brand-link img {
    height: 32px;
    width: 32px;
    transition: transform 0.2s ease;
}
.header-left .brand-link:hover img {
    transform: scale(1.1) rotate(-3deg);
}
.header-left .brand-link span {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.header-left .divider {
    width: 1px;
    height: 24px;
    background: var(--surface1);
    flex-shrink: 0;
}
.header-left .page-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--subtext0);
    white-space: nowrap;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

/* Status indicator */
#status-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--subtext0);
    white-space: nowrap;
}
#status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--red);
    transition: background 0.3s ease;
    flex-shrink: 0;
}
#status-dot.ready { background: var(--green); }

/* Example Selector */
#example-selector {
    padding: 6px 10px;
    border: 1px solid var(--surface1);
    border-radius: var(--radius-sm);
    background: var(--surface0);
    color: var(--text);
    font-size: 12px;
    cursor: pointer;
    outline: none;
    min-width: 120px;
    transition: border-color 0.2s;
}
#example-selector:hover, #example-selector:focus {
    border-color: var(--orange);
}

/* Run Button */
#btn-run {
    padding: 7px 20px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--orange);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(.2,1,.3,1);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}
#btn-run:hover:not(:disabled) {
    background: var(--orange-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(211,84,0,0.35);
}
#btn-run:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
#btn-run .key-hint {
    font-size: 11px;
    opacity: 0.7;
    font-weight: 400;
}

/* Main area */
main {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Editor */
#editor-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}
.CodeMirror {
    height: 100%;
    font-family: "Iosevka", "Fira Code", "Cascadia Code", "JetBrains Mono", monospace;
    font-size: 14px;
    line-height: 1.5;
    background: var(--editor-bg);
    color: var(--text);
}

/* Custom CodeMirror Theme: vix-dark */
.cm-s-vix-dark.CodeMirror {
    background: var(--editor-bg);
    color: #abb2bf;
}
.cm-s-vix-dark .CodeMirror-gutters {
    background: var(--editor-bg);
    border-right: 1px solid var(--editor-border);
}
.cm-s-vix-dark .CodeMirror-linenumber {
    color: #5c6370;
    padding: 0 12px 0 8px;
    font-size: 12px;
}
.cm-s-vix-dark .CodeMirror-cursor {
    border-left: 2px solid var(--orange);
}
.cm-s-vix-dark .CodeMirror-selected {
    background: rgba(230, 126, 34, 0.2);
}
.cm-s-vix-dark .CodeMirror-activeline-background {
    background: rgba(255, 255, 255, 0.04);
}
.cm-s-vix-dark .CodeMirror-matchingbracket {
    background: rgba(230, 126, 34, 0.3);
    color: var(--text) !important;
    outline: 1px solid var(--orange);
    border-radius: 2px;
}
.cm-s-vix-dark .cm-keyword {
    color: #CC7832;
    font-weight: 600;
}
.cm-s-vix-dark .cm-def {
    color: #FFC66D;
}
.cm-s-vix-dark .cm-variable {
    color: #e06c75;
}
.cm-s-vix-dark .cm-variable-2 {
    color: #e06c75;
}
.cm-s-vix-dark .cm-number {
    color: #d19a66;
}
.cm-s-vix-dark .cm-string {
    color: #98c379;
}
.cm-s-vix-dark .cm-comment {
    color: #5c6370;
    font-style: italic;
}
.cm-s-vix-dark .cm-type {
    color: #4DB8A8;
}
.cm-s-vix-dark .cm-operator {
    color: #abb2bf;
}
.cm-s-vix-dark .cm-atom {
    color: #56b6c2;
}
.cm-s-vix-dark .cm-property {
    color: #56b6c2;
}
.cm-s-vix-dark .cm-builtin {
    color: #CC7832;
}

/* Output Panel */
#output-container {
    width: 420px;
    display: flex;
    flex-direction: column;
    background: var(--crust);
    border-left: 1px solid var(--surface0);
    flex-shrink: 0;
    position: relative;
}

#output-tabs {
    display: flex;
    border-bottom: 1px solid var(--surface0);
    background: var(--mantle);
    flex-shrink: 0;
}
#output-tabs .tab {
    flex: 1;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--overlay0);
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
    font-family: inherit;
}
#output-tabs .tab:hover {
    color: var(--subtext0);
}
#output-tabs .tab.active {
    color: var(--text);
}
#output-tabs .tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--orange);
    transition: width 0.2s ease;
    border-radius: 1px 1px 0 0;
}
#output-tabs .tab.active::after {
    width: 60%;
}

#output-content, #wasm-content {
    flex: 1;
    padding: 16px;
    font-family: "Iosevka", "Fira Code", "Cascadia Code", monospace;
    font-size: 13px;
    color: var(--text);
    overflow: auto;
    white-space: pre-wrap;
    line-height: 1.6;
}
#output-content:empty::before,
#wasm-content:empty::before {
    content: '点击 ▶ 运行 查看输出';
    color: var(--overlay0);
    font-style: italic;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Output toolbar */
#output-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px;
    background: var(--mantle);
    border-bottom: 1px solid var(--surface0);
    flex-shrink: 0;
}
#output-toolbar .output-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--overlay0);
}
#btn-clear-output {
    padding: 3px 10px;
    border: 1px solid var(--surface1);
    border-radius: 4px;
    background: transparent;
    color: var(--overlay0);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}
#btn-clear-output:hover {
    border-color: var(--red);
    color: var(--red);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--surface1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--overlay0);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 0 12px;
        height: 48px;
        gap: 8px;
    }
    .header-left .brand-link span { display: none; }
    .header-left .divider { display: none; }
    .header-left .page-title { display: none; }
    #status-indicator { display: none; }
    #example-selector { min-width: 0; flex: 1; max-width: 140px; }
    #btn-run { padding: 7px 14px; }
    #btn-run .key-hint { display: none; }

    main {
        flex-direction: column;
    }
    #output-container {
        width: 100%;
        height: 35vh;
        border-left: none;
        border-top: 1px solid var(--surface0);
    }
    #editor-container {
        height: 65vh;
    }
    .CodeMirror { font-size: 13px; }
}

@media (max-width: 480px) {
    header {
        padding: 0 8px;
        gap: 6px;
    }
    .header-left .brand-link img { height: 28px; width: 28px; }
    #example-selector { max-width: 100px; font-size: 11px; padding: 5px 8px; }
    #btn-run { padding: 6px 12px; font-size: 12px; }
    #output-container { height: 30vh; }
    #editor-container { height: 70vh; }
}

/* Lint annotations */
.cm-s-vix-dark .CodeMirror-lint-markers {
    width: 16px;
}
.cm-s-vix-dark .CodeMirror-lint-mark-error {
    background: rgba(243, 139, 168, 0.6);
}
.cm-s-vix-dark .CodeMirror-lint-mark-warning {
    background: rgba(229, 192, 123, 0.5);
}
.cm-s-vix-dark .CodeMirror-lint-mark-info {
    background: rgba(137, 180, 250, 0.4);
}
.cm-s-vix-dark .cm-lint-error {
    text-decoration: wavy underline;
    text-decoration-color: var(--red);
    text-underline-offset: 2px;
}
.cm-s-vix-dark .cm-lint-warning {
    background: rgba(229, 192, 123, 0.06);
    border-bottom: 1px dotted rgba(229, 192, 123, 0.35);
}
.cm-s-vix-dark .cm-lint-info {
    border-bottom: 1px dotted rgba(137, 180, 250, 0.3);
}
.cm-s-vix-dark .CodeMirror-lint-tooltip {
    background: var(--mantle);
    border: 1px solid var(--surface1);
    border-radius: var(--radius-sm);
    color: var(--subtext0);
    font-size: 12px;
    padding: 4px 8px;
}

/* Hint popup */
.CodeMirror-hints {
    background: var(--mantle);
    border: 1px solid var(--surface1);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
    font-family: "Iosevka", "Fira Code", monospace;
    font-size: 13px;
    padding: 4px;
}
.CodeMirror-hint {
    color: var(--text);
    border-radius: 4px;
    padding: 2px 8px;
}
.CodeMirror-hint-active {
    background: var(--orange);
    color: #fff;
}

/* Hover tooltip */
.vix-hover-tooltip {
    position: fixed;
    z-index: 10000;
    max-width: 320px;
    background: var(--mantle);
    border: 1px solid var(--surface1);
    border-radius: var(--radius-sm);
    color: var(--subtext0);
    font-size: 12px;
    line-height: 1.5;
    padding: 8px 10px;
    white-space: pre-line;
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

/* Signature tooltip */
.vix-signature-tooltip {
    position: fixed;
    z-index: 10000;
    background: var(--mantle);
    border: 1px solid var(--surface1);
    border-radius: var(--radius-sm);
    color: var(--subtext0);
    font-size: 12px;
    line-height: 1.5;
    padding: 6px 10px;
    white-space: nowrap;
    pointer-events: none;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.vix-signature-tooltip .sig-name {
    color: var(--text);
    font-family: "Iosevka", "Fira Code", monospace;
    font-size: 13px;
}