:root {
    --font-ui: 'Inter', 'Segoe UI', sans-serif;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 9px;
    --toolbar-h: 54px;
}

[data-theme="dark"] {
    --bg-base: #0c151d;
    --bg-grad-1: #102733;
    --bg-grad-2: #0e1e28;
    --blob-1: rgba(35, 160, 170, 0.24);
    --blob-2: rgba(50, 120, 185, 0.20);
    --blob-3: rgba(60, 150, 160, 0.14);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-heavy: rgba(20, 28, 33, 0.78);
    --glass-border: rgba(255, 255, 255, 0.10);
    --glass-highlight: rgba(255, 255, 255, 0.16);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
    --text-primary: rgba(240, 246, 248, 0.92);
    --text-secondary: rgba(240, 246, 248, 0.55);
    --accent: #3fb8a8;
    --accent-strong: #2f9e90;
    --accent-contrast: #06211d;
    --danger: #f47272;
    --editor-text: rgba(232, 240, 242, 0.92);
    --selection: rgba(63, 184, 168, 0.30);
    --scrollbar: rgba(148, 168, 175, 0.35);
    --scrollbar-hover: rgba(148, 168, 175, 0.6);
}

[data-theme="light"] {
    --bg-base: #edf4f7;
    --bg-grad-1: #d9ecf2;
    --bg-grad-2: #e2f1f0;
    --blob-1: rgba(70, 180, 185, 0.24);
    --blob-2: rgba(90, 150, 205, 0.20);
    --blob-3: rgba(110, 185, 180, 0.16);
    --glass-bg: rgba(255, 255, 255, 0.5);
    --glass-bg-heavy: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.7);
    --glass-highlight: rgba(255, 255, 255, 0.92);
    --glass-shadow: 0 8px 32px rgba(60, 80, 90, 0.14);
    --text-primary: rgba(24, 36, 40, 0.9);
    --text-secondary: rgba(24, 36, 40, 0.55);
    --accent: #14897d;
    --accent-strong: #0f6f66;
    --accent-contrast: #ffffff;
    --danger: #d64545;
    --editor-text: rgba(20, 32, 36, 0.92);
    --selection: rgba(20, 137, 125, 0.22);
    --scrollbar: rgba(110, 130, 138, 0.4);
    --scrollbar-hover: rgba(90, 110, 118, 0.6);
}

[data-theme="midnight"] {
    --bg-base: #08090c;
    --bg-grad-1: #101318;
    --bg-grad-2: #0b0d11;
    --blob-1: rgba(90, 100, 130, 0.14);
    --blob-2: rgba(60, 70, 100, 0.12);
    --blob-3: rgba(80, 85, 110, 0.10);
    --glass-bg: rgba(255, 255, 255, 0.045);
    --glass-bg-heavy: rgba(14, 16, 20, 0.86);
    --glass-border: rgba(255, 255, 255, 0.09);
    --glass-highlight: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    --text-primary: rgba(235, 238, 243, 0.92);
    --text-secondary: rgba(235, 238, 243, 0.52);
    --accent: #8a93ff;
    --accent-strong: #6f79f2;
    --accent-contrast: #0b0d1f;
    --danger: #f47272;
    --editor-text: rgba(232, 235, 242, 0.92);
    --selection: rgba(138, 147, 255, 0.30);
    --scrollbar: rgba(150, 155, 175, 0.32);
    --scrollbar-hover: rgba(150, 155, 175, 0.58);
}

[data-theme="classic"] {
    --font-ui: 'Tahoma', 'MS Sans Serif', 'Segoe UI', sans-serif;
    --radius-lg: 0px;
    --radius-md: 0px;
    --radius-sm: 0px;
    --bg-base: #008080;
    --bg-grad-1: #008080;
    --bg-grad-2: #008080;
    --blob-1: transparent;
    --blob-2: transparent;
    --blob-3: transparent;
    --glass-bg: #c0c0c0;
    --glass-bg-heavy: #c0c0c0;
    --glass-border: #808080;
    --glass-highlight: #ffffff;
    --glass-shadow: none;
    --text-primary: #000000;
    --text-secondary: #3f3f3f;
    --accent: #000080;
    --accent-strong: #000080;
    --accent-contrast: #ffffff;
    --danger: #aa0000;
    --editor-text: #000000;
    --selection: rgba(0, 0, 128, 0.35);
    --scrollbar: #808080;
    --scrollbar-hover: #5f5f5f;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-ui);
    color: var(--text-primary);
    background: var(--bg-base);
}

/* ---------- animated liquid backdrop ---------- */
.backdrop {
    position: fixed;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(120% 90% at 15% 10%, var(--bg-grad-1) 0%, transparent 60%),
        radial-gradient(110% 90% at 85% 90%, var(--bg-grad-2) 0%, transparent 60%),
        var(--bg-base);
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(110px);
    opacity: 0.8;
    will-change: transform;
}

.blob-1 {
    width: 46vw; height: 46vw;
    top: -12vw; left: -8vw;
    background: var(--blob-1);
    animation: drift1 26s ease-in-out infinite alternate;
}

.blob-2 {
    width: 40vw; height: 40vw;
    bottom: -14vw; right: -6vw;
    background: var(--blob-2);
    animation: drift2 32s ease-in-out infinite alternate;
}

.blob-3 {
    width: 30vw; height: 30vw;
    top: 40%; left: 55%;
    background: var(--blob-3);
    animation: drift3 38s ease-in-out infinite alternate;
}

@keyframes drift1 { to { transform: translate(10vw, 8vh) scale(1.15); } }
@keyframes drift2 { to { transform: translate(-8vw, -10vh) scale(1.1); } }
@keyframes drift3 { to { transform: translate(-12vw, 6vh) scale(0.85); } }

@media (prefers-reduced-motion: reduce) {
    .blob { animation: none; }
}

/* ---------- glass primitives ---------- */
.glass {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    backdrop-filter: blur(22px) saturate(160%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
}

.glass-heavy {
    background: var(--glass-bg-heavy);
    -webkit-backdrop-filter: blur(28px) saturate(170%);
    backdrop-filter: blur(28px) saturate(170%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
}

/* ---------- layout ---------- */
.app {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 14px;
    gap: 12px;
}

/* ---------- toolbar ---------- */
.toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: var(--toolbar-h);
    padding: 8px 12px;
    border-radius: var(--radius-lg);
    flex-wrap: wrap;
}

.tool-btn[hidden] { display: none; }

.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 13px;
    font: 500 13.5px var(--font-ui);
    color: var(--text-primary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.18s, border-color 0.18s, transform 0.1s;
    white-space: nowrap;
}

.tool-btn:hover {
    background: var(--glass-bg);
    border-color: var(--glass-border);
}

.tool-btn:active { transform: scale(0.97); }

.tool-btn svg { flex-shrink: 0; opacity: 0.85; }

.icon-only { padding: 8px 10px; }

.app-icon {
    border-radius: 26%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    flex-shrink: 0;
}

.logo-btn {
    font-weight: 700;
    font-size: 14.5px;
    letter-spacing: -0.01em;
    color: var(--accent-strong);
}

.logo-text {
    background: linear-gradient(120deg, var(--accent), #6fa8c9);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.divider {
    width: 1px;
    height: 24px;
    margin: 0 4px;
    background: var(--glass-border);
}

.spacer { flex: 1 1 auto; }

/* selects */
.glass-select {
    appearance: none;
    -webkit-appearance: none;
    padding: 8px 28px 8px 12px;
    font: 500 13px var(--font-ui);
    color: var(--text-primary);
    background:
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='14' height='14'%3E%3Cpath fill='%23888da8' d='M7.41,8.58L12,13.17L16.59,8.58L18,10L12,16L6,10L7.41,8.58Z'/%3E%3C/svg%3E") no-repeat right 9px center,
        var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    outline: none;
    transition: border-color 0.18s;
    max-width: 160px;
}

.glass-select:hover, .glass-select:focus { border-color: var(--accent); }

.glass-select option {
    background: var(--bg-base);
    color: var(--text-primary);
}

/* zoom group */
.zoom-group {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
}

.zoom-btn {
    width: 26px; height: 26px;
    display: grid;
    place-items: center;
    font-size: 15px;
    color: var(--text-primary);
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.15s;
}

.zoom-btn:hover { background: var(--glass-border); }

#zoomLevel {
    min-width: 24px;
    text-align: center;
    font: 500 12.5px var(--font-ui);
    color: var(--text-secondary);
}

/* wrap toggle */
.wrap-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    font: 500 13px var(--font-ui);
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.wrap-toggle input { display: none; }

.toggle-track {
    position: relative;
    width: 34px; height: 19px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    transition: background 0.2s, border-color 0.2s;
}

.toggle-thumb {
    position: absolute;
    top: 2px; left: 2px;
    width: 13px; height: 13px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: transform 0.2s, background 0.2s;
}

.wrap-toggle input:checked + .toggle-track {
    background: var(--accent);
    border-color: var(--accent);
}

.wrap-toggle input:checked + .toggle-track .toggle-thumb {
    transform: translateX(15px);
    background: #fff;
}

/* ---------- tab bar ---------- */
.tabbar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    border-radius: var(--radius-md);
}

.tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    flex: 1 1 auto;
    min-width: 0;
    scrollbar-width: thin;
}
.tabs::-webkit-scrollbar { height: 5px; }
.tabs::-webkit-scrollbar-thumb { border: none; border-radius: 3px; }

.tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px 6px 12px;
    font: 500 12.5px var(--font-ui);
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    /* shrink before scrolling: tabs compress down to a readable minimum,
       then the bar scrolls horizontally */
    flex: 0 1 auto;
    min-width: 74px;
    max-width: 220px;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

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

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

.tab.in-other-pane { border-style: dashed; border-color: var(--accent); }

.tab-name {
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1 1 auto;
    min-width: 20px;
    max-width: 160px;
}

.tab-dirty {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--accent-strong);
    flex-shrink: 0;
}

.tab-close {
    display: grid;
    place-items: center;
    width: 18px; height: 18px;
    font-size: 14px;
    line-height: 1;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.tab-close:hover { background: var(--glass-border); color: var(--text-primary); }

.tab-add {
    display: grid;
    place-items: center;
    width: 28px; height: 28px;
    font-size: 17px;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    flex-shrink: 0;
    transition: color 0.15s, border-color 0.15s;
}

.tab-add:hover { color: var(--accent-strong); border-color: var(--accent); }

/* ---------- workspace & panes ---------- */
.workspace {
    flex: 1;
    display: flex;
    gap: 12px;
    min-height: 0;
}

.pane {
    flex: 1 1 0;
    min-width: 0;
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 0;
}

.pane[hidden] { display: none; }

.pane.focused { border-color: var(--accent); }

.pane-head {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    border-bottom: 1px solid var(--glass-border);
}

.pane-head[hidden] { display: none; }

.pane-tab-select {
    flex: 1 1 auto;
    min-width: 0;
    max-width: none;
    padding: 6px 26px 6px 10px;
    font-size: 12.5px;
}

.pane-close {
    display: grid;
    place-items: center;
    width: 26px; height: 26px;
    font-size: 17px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.pane-close:hover { background: var(--glass-bg); color: var(--text-primary); }

/* toolbar toggle state */
.tool-btn.active {
    background: var(--glass-bg);
    border-color: var(--accent);
    color: var(--accent-strong);
}

/* ---------- editor ---------- */
.editor-shell {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
}

.gutter {
    flex: none;
    overflow: hidden;
    user-select: none;
    border-right: 1px solid var(--glass-border);
    background: rgba(140, 165, 175, 0.05);
}

.gutter-inner {
    padding: 22px 0;
    will-change: transform;
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    line-height: 1.65;
}

.gutter-line {
    padding: 0 12px 0 16px;
    text-align: right;
    color: var(--text-secondary);
    opacity: 0.75;
    font-variant-numeric: tabular-nums;
}

.editor {
    flex: 1;
    width: 100%;
    padding: 22px 26px 22px 18px;
    border: none;
    resize: none;
    outline: none;
    background: transparent;
    color: var(--editor-text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    line-height: 1.65;
    white-space: pre;
    overflow-wrap: normal;
    overflow: auto;
    caret-color: var(--accent-strong);
    tab-size: 4;
}

.editor.wrap {
    white-space: pre-wrap;
    overflow-wrap: break-word;
    overflow-x: hidden;
}

.editor::placeholder { color: var(--text-secondary); }
.editor::selection { background: var(--selection); }

/* ---------- syntax highlight overlay ---------- */
.editor-stack {
    position: relative;
    flex: 1;
    display: flex;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.editor-stack .editor {
    position: relative;
    z-index: 1;
}

.hl-layer {
    position: absolute;
    inset: 0;
    margin: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
    display: none;
    background: transparent;
}

.editor-stack.hl-on .hl-layer { display: block; }

.editor-stack.hl-on .editor {
    color: transparent;
    caret-color: var(--accent-strong);
}

.hl-layer code {
    display: block;
    box-sizing: border-box;
    padding: 22px 26px 22px 18px;
    background: transparent;
    color: var(--editor-text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    line-height: 1.65;
    white-space: pre;
    overflow-wrap: normal;
    tab-size: 4;
    will-change: transform;
}

.editor-stack.wrap .hl-layer code {
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

/* highlight.js token colors — dark theme */
.hljs-comment, .hljs-quote { color: #6f8b96; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-tag, .hljs-name { color: #6fc3df; }
.hljs-string, .hljs-attr, .hljs-regexp, .hljs-addition { color: #8ee6c2; }
.hljs-number, .hljs-literal, .hljs-symbol, .hljs-bullet { color: #f0b374; }
.hljs-title, .hljs-section, .hljs-title.function_, .hljs-title.class_ { color: #a5d8ff; }
.hljs-attribute, .hljs-variable, .hljs-template-variable { color: #d6b3ff; }
.hljs-built_in, .hljs-type { color: #7fd6e0; }
.hljs-meta, .hljs-selector-id, .hljs-selector-class { color: #c9a86a; }
.hljs-deletion { color: #f09999; }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

/* highlight.js token colors — light theme */
:is([data-theme="light"],[data-theme="classic"]) .hljs-comment, :is([data-theme="light"],[data-theme="classic"]) .hljs-quote { color: #6a8a94; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-keyword, :is([data-theme="light"],[data-theme="classic"]) .hljs-selector-tag, :is([data-theme="light"],[data-theme="classic"]) .hljs-tag, :is([data-theme="light"],[data-theme="classic"]) .hljs-name { color: #0b6a92; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-string, :is([data-theme="light"],[data-theme="classic"]) .hljs-attr, :is([data-theme="light"],[data-theme="classic"]) .hljs-regexp, :is([data-theme="light"],[data-theme="classic"]) .hljs-addition { color: #0f7a52; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-number, :is([data-theme="light"],[data-theme="classic"]) .hljs-literal, :is([data-theme="light"],[data-theme="classic"]) .hljs-symbol, :is([data-theme="light"],[data-theme="classic"]) .hljs-bullet { color: #a55c00; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-title, :is([data-theme="light"],[data-theme="classic"]) .hljs-section, :is([data-theme="light"],[data-theme="classic"]) .hljs-title.function_, :is([data-theme="light"],[data-theme="classic"]) .hljs-title.class_ { color: #1a5fb4; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-attribute, :is([data-theme="light"],[data-theme="classic"]) .hljs-variable, :is([data-theme="light"],[data-theme="classic"]) .hljs-template-variable { color: #7a3fb0; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-built_in, :is([data-theme="light"],[data-theme="classic"]) .hljs-type { color: #0d7285; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-meta, :is([data-theme="light"],[data-theme="classic"]) .hljs-selector-id, :is([data-theme="light"],[data-theme="classic"]) .hljs-selector-class { color: #8a6d1f; }
:is([data-theme="light"],[data-theme="classic"]) .hljs-deletion { color: #b3261e; }

/* ---------- markdown preview ---------- */
.md-preview {
    flex: 1;
    min-height: 0;
    overflow: auto;
    padding: 26px 32px;
    color: var(--text-primary);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 15.5px;
    line-height: 1.7;
}

.md-preview[hidden] { display: none; }

.md-preview h1, .md-preview h2, .md-preview h3,
.md-preview h4, .md-preview h5, .md-preview h6 {
    margin: 1.2em 0 0.5em;
    line-height: 1.3;
    color: var(--text-primary);
}
.md-preview h1:first-child, .md-preview h2:first-child, .md-preview h3:first-child { margin-top: 0; }
.md-preview h1 { font-size: 1.9em; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.3em; }
.md-preview h2 { font-size: 1.5em; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.25em; }
.md-preview h3 { font-size: 1.25em; }
.md-preview p, .md-preview ul, .md-preview ol, .md-preview blockquote { margin: 0.7em 0; }
.md-preview ul, .md-preview ol { padding-left: 1.6em; }
.md-preview a { color: var(--accent-strong); }
.md-preview code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 5px;
    padding: 0.1em 0.35em;
}
.md-preview pre {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    overflow: auto;
}
.md-preview pre code { background: transparent; border: none; padding: 0; }
.md-preview blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 14px;
    color: var(--text-secondary);
}
.md-preview table { border-collapse: collapse; margin: 0.8em 0; }
.md-preview th, .md-preview td {
    border: 1px solid var(--glass-border);
    padding: 6px 12px;
}
.md-preview th { background: var(--glass-bg); }
.md-preview img { max-width: 100%; }
.md-preview hr { border: none; border-top: 1px solid var(--glass-border); margin: 1.4em 0; }

/* ---------- tab rename button ---------- */
.tab-rename {
    display: grid;
    place-items: center;
    width: 18px; height: 18px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.tab-rename:hover { background: var(--glass-border); color: var(--accent-strong); }

/* ---------- scrollbars ---------- */
::-webkit-scrollbar { width: 13px; height: 13px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--scrollbar);
    border-radius: 13px;
    border: 4px solid transparent;
    background-clip: padding-box;
    min-height: 40px;
    transition: background 0.2s;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-hover);
    background-clip: padding-box;
    border-width: 3px;
}
::-webkit-scrollbar-corner { background: transparent; }

* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar) transparent;
}

/* ---------- status bar ---------- */
.statusbar {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: 12.5px;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.status-item { white-space: nowrap; }

.status-dirty { color: var(--danger); font-weight: 600; }

/* ---------- modals ---------- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(6, 8, 20, 0.45);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    align-items: flex-start;
    justify-content: center;
    padding: 12vh 20px 20px;
}

.modal.show { display: flex; }

.modal-content {
    position: relative;
    width: 100%;
    max-width: 440px;
    padding: 26px 28px;
    border-radius: var(--radius-lg);
    animation: modalIn 0.22s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(14px) scale(0.97); }
    to { opacity: 1; transform: none; }
}

.modal-content h3 {
    margin: 0 0 16px;
    font-size: 17px;
    font-weight: 600;
}

.close {
    position: absolute;
    top: 12px; right: 14px;
    width: 30px; height: 30px;
    display: grid;
    place-items: center;
    font-size: 20px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.close:hover { background: var(--glass-bg); color: var(--text-primary); }

.glass-input {
    width: 100%;
    padding: 10px 14px;
    margin-bottom: 10px;
    font: 400 14px var(--font-ui);
    color: var(--text-primary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.18s;
}

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

.check-label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 14px;
    cursor: pointer;
    user-select: none;
}

.check-label input { accent-color: var(--accent); }

.modal-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.glass-btn[hidden] { display: none; }

.glass-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 15px;
    font: 500 13px var(--font-ui);
    color: var(--text-primary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.glass-btn:hover { border-color: var(--accent); }
.glass-btn:active { transform: scale(0.97); }

.glass-btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    border-color: transparent;
    color: var(--accent-contrast);
}

.glass-btn.primary:hover { filter: brightness(1.1); }

.glass-btn.danger {
    background: linear-gradient(135deg, #e05252, #c73838);
    border-color: transparent;
    color: #fff;
}

.glass-btn.danger:hover { filter: brightness(1.1); }

.close-all-text {
    margin: 12px 0 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.close-all-list {
    margin: 8px 0 0;
    padding-left: 22px;
    max-height: 180px;
    overflow-y: auto;
    font-size: 13px;
    color: var(--text-primary);
}

.close-all-list:empty { display: none; }

.close-all-list li { margin: 2px 0; }

.find-status {
    margin: 12px 0 0;
    min-height: 18px;
    font-size: 12.5px;
    color: var(--text-secondary);
}

/* about modal */
.about-content { text-align: center; }
.about-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}
.about-logo { margin-bottom: 10px; border-radius: 24%; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3); }
.about-description { color: var(--text-secondary); font-size: 14px; line-height: 1.55; }
.about-byline { font-style: italic; color: var(--text-secondary); font-size: 13px; margin-bottom: 18px; }

/* ---------- toast ---------- */
.toast {
    position: fixed;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    padding: 11px 20px;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    color: var(--text-primary);
    animation: toastIn 0.25s ease;
    max-width: min(90vw, 480px);
    text-align: center;
}

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

@keyframes toastIn {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* ---------- compare / diff ---------- */
.compare-content {
    max-width: min(1100px, 94vw);
    display: flex;
    flex-direction: column;
    max-height: 82vh;
}

.compare-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.compare-controls .glass-select { flex: 1 1 160px; max-width: none; min-width: 0; }

.compare-vs {
    font-size: 12.5px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.diff-summary {
    margin: 0 0 10px;
    min-height: 16px;
    font-size: 12.5px;
    color: var(--text-secondary);
}

.diff-view {
    flex: 1;
    min-height: 120px;
    overflow: auto;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    background: rgba(140, 165, 175, 0.04);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    line-height: 1.55;
    display: grid;
    grid-template-columns: minmax(50%, max-content) minmax(50%, max-content);
    grid-auto-rows: min-content;
    align-content: start;
}

.diff-view.wrap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.diff-empty {
    margin: 0;
    padding: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    grid-column: 1 / -1;
}

.diff-cell {
    display: flex;
    align-items: flex-start;
    padding: 1px 12px 1px 0;
    color: var(--editor-text);
    min-width: 0;
    min-height: 1.55em;
    box-sizing: content-box;
}

.diff-cell.left { border-right: 1px solid var(--glass-border); }

.diff-code {
    flex: 1 1 auto;
    min-width: 0;
    white-space: pre;
    tab-size: 4;
}

.diff-view.wrap .diff-code {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.diff-cell.diff-header {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--bg-base);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 12px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--glass-border);
    padding-top: 5px;
    padding-bottom: 5px;
}

.diff-cell.diff-header .diff-code {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.diff-ln {
    flex: 0 0 44px;
    width: 44px;
    padding-right: 10px;
    text-align: right;
    color: var(--text-secondary);
    opacity: 0.7;
    user-select: none;
    font-variant-numeric: tabular-nums;
    box-sizing: border-box;
}

.diff-cell.diff-del { background: rgba(255, 99, 110, 0.16); }
.diff-cell.diff-add { background: rgba(63, 184, 140, 0.16); }

.diff-wrap-label { margin-bottom: 0; flex-shrink: 0; }
.diff-blank {
    background:
        repeating-linear-gradient(45deg, transparent, transparent 5px,
            rgba(140, 165, 175, 0.06) 5px, rgba(140, 165, 175, 0.06) 10px);
}

[data-theme="light"] .diff-del { background: rgba(214, 60, 76, 0.14); }
[data-theme="light"] .diff-add { background: rgba(18, 138, 104, 0.14); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
    #fontSelect { display: none; }
    .glass-select { max-width: 120px; }
}

@media (max-width: 760px) {
    .app { padding: 8px; gap: 8px; }
    .toolbar { padding: 6px 8px; gap: 4px; }
    .logo-text, .tool-btn span { display: none; }
    .tool-btn { padding: 8px 9px; }
    .glass-select { max-width: 100px; }
    .divider { margin: 0 1px; }
    .wrap-toggle { padding: 6px 4px; gap: 0; font-size: 0; }
    .statusbar { gap: 12px; padding: 7px 12px; }
    #statusCounts, #statusLines { display: none; }
    .workspace { flex-direction: column; }
    .editor { padding: 16px 14px 16px 10px; }
    .gutter-line { padding: 0 8px 0 10px; }
    .modal { padding: 6vh 10px 10px; }
    .compare-content { max-height: 88vh; padding: 20px 16px; }
}

@media (max-width: 480px) {
    #encodingSelect { display: none; }
    .zoom-group { display: none; }
}

/* ---------- settings modal ---------- */
.settings-content { max-width: 460px; }

.settings-heading {
    margin: 18px 0 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.theme-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 10px 6px;
    font: 500 12px var(--font-ui);
    color: var(--text-secondary);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.theme-option:hover { color: var(--text-primary); border-color: var(--accent); }

.theme-option.selected {
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 1px var(--accent);
}

.theme-swatch {
    width: 100%;
    height: 38px;
    border-radius: 6px;
    border: 1px solid rgba(128, 128, 128, 0.35);
}

.swatch-dark { background: linear-gradient(135deg, #102733, #0c151d 60%, #2f9e90); }
.swatch-light { background: linear-gradient(135deg, #edf4f7, #d9ecf2 60%, #14897d); }
.swatch-midnight { background: linear-gradient(135deg, #101318, #08090c 60%, #6f79f2); }
.swatch-classic { background: linear-gradient(135deg, #c0c0c0 0%, #c0c0c0 55%, #008080 55%, #008080 100%); }

.settings-about {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.settings-about .app-icon { border-radius: 24%; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25); }

.settings-about-text strong { font-size: 15px; }
.settings-about-text p { margin: 4px 0 0; }
.settings-about-text .about-byline { margin-bottom: 0; }

.settings-content .about-actions { margin-top: 14px; }

@media (max-width: 480px) {
    .theme-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- classic (90s / Win98) theme ---------- */
[data-theme="classic"] .blob { display: none; }
[data-theme="classic"] .backdrop { background: #008080; }

[data-theme="classic"] .glass,
[data-theme="classic"] .glass-heavy {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: #c0c0c0;
    border: 2px solid;
    border-color: #ffffff #808080 #808080 #ffffff;
    box-shadow: none;
}

[data-theme="classic"] .tool-btn,
[data-theme="classic"] .glass-btn,
[data-theme="classic"] .tab-add,
[data-theme="classic"] .theme-option,
[data-theme="classic"] .glass-select {
    background: #c0c0c0;
    border: 2px solid;
    border-color: #ffffff #808080 #808080 #ffffff;
    color: #000;
    transition: none;
}

[data-theme="classic"] .tool-btn:hover,
[data-theme="classic"] .glass-btn:hover,
[data-theme="classic"] .tab-add:hover { background: #d4d0c8; filter: none; }

[data-theme="classic"] .tool-btn:active,
[data-theme="classic"] .glass-btn:active,
[data-theme="classic"] .tab-add:active,
[data-theme="classic"] .tool-btn.active {
    border-color: #808080 #ffffff #ffffff #808080;
    background: #c0c0c0;
}

[data-theme="classic"] .glass-btn.primary,
[data-theme="classic"] .glass-btn.danger {
    background: #c0c0c0;
    color: #000;
    font-weight: 700;
}

[data-theme="classic"] .glass-input,
[data-theme="classic"] .glass-select,
[data-theme="classic"] .editor-shell,
[data-theme="classic"] .md-preview {
    background: #ffffff;
    border: 2px solid;
    border-color: #808080 #ffffff #ffffff #808080;
}

[data-theme="classic"] .glass-select { background: #ffffff; }

[data-theme="classic"] .editor-shell { margin: 4px; flex: 1; }

[data-theme="classic"] .gutter { background: #ececec; }

[data-theme="classic"] .tab {
    border: 2px solid;
    border-color: #ffffff #808080 #808080 #ffffff;
    background: #c0c0c0;
    color: #000;
}

[data-theme="classic"] .tab.active {
    background: #000080;
    color: #ffffff;
    border-color: #808080 #ffffff #ffffff #808080;
}

[data-theme="classic"] .tab.active .tab-rename,
[data-theme="classic"] .tab.active .tab-close { color: #fff; }

[data-theme="classic"] .modal {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: rgba(0, 0, 0, 0.3);
}

[data-theme="classic"] .theme-option.selected {
    border-color: #808080 #ffffff #ffffff #808080;
    box-shadow: inset 0 0 0 2px #000080;
}

[data-theme="classic"] ::-webkit-scrollbar-thumb {
    background: #c0c0c0;
    border-radius: 0;
    border: 2px solid;
    border-color: #ffffff #808080 #808080 #ffffff;
    background-clip: border-box;
}