:root {
    --bg: #0b0b0c;
    --panel: #131316;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --accent: #3b82f6;
    --ring: #2563eb33;
    --gap: 12px;
    --radius: 14px;
    --btn-cyan: #00f5ff;
    --btn-lime: #aaff00;
    --btn-blue: #3b82f6;
    --btn-text-dark: #000;
    --btn-text-light: #fff;
    --border: #1f2937;
    --qr-surface: #0e0f12;
    --shadow-main: 0 10px 30px #0006, inset 0 1px 0 #ffffff08;
}

html[data-theme="classic"] {
    --bg: #0b0b0c;
    --panel: #131316;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --border: #1f2937;
    --accent: #3b82f6;
    --ring: #2563eb33;
    --qr-surface: #0e0f12;
    --btn-cyan: #00f5ff;
    --btn-lime: #aaff00;
    --btn-blue: #3b82f6;
}

html[data-theme="neon"] {
    --bg: #050508;
    --panel: #0c0c14;
    --text: #f7f7ff;
    --muted: #9aa0ab;
    --border: #1b1b2b;
    --accent: #22d3ee;
    --ring: #22d3ee33;
    --qr-surface: #0a0a12;
    --btn-cyan: #22d3ee;
    --btn-lime: #b9ff39;
    --btn-blue: #60a5fa;
}

html[data-theme="glass"] {
    --bg: linear-gradient(120deg, #0b0b12 0%, #111321 100%);
    --panel: #ffffff1a;
    --text: #eef2ff;
    --muted: #c7cbe4;
    --border: #ffffff26;
    --accent: #7dd3fc;
    --ring: #7dd3fc33;
    --qr-surface: #101423;
    --btn-cyan: #7dd3fc;
    --btn-lime: #bef264;
    --btn-blue: #93c5fd;
}

html[data-theme="mono"] {
    --bg: #0c0c0c;
    --panel: #121212;
    --text: #e5e5e5;
    --muted: #a3a3a3;
    --border: #212121;
    --accent: #9ca3af;
    --ring: #9ca3af33;
    --qr-surface: #101010;
    --btn-cyan: #d4d4d4;
    --btn-lime: #e5e7eb;
    --btn-blue: #a3a3a3;
}

* {
    box-sizing: border-box
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: grid;
    place-items: start center;
    padding: 32px 16px 64px;
    gap: 18px;
}

h1 {
    margin: 0;
    font-weight: 800;
    letter-spacing: .2px;
    background: linear-gradient(90deg, #ffffff, #00ff95);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent
}

.wrap {
    width: min(920px, 92vw);
    display: grid;
    gap: 18px;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow-main);
    backdrop-filter: blur(0px);
    transition: backdrop-filter .3s ease, background .3s ease, border-color .3s ease;
}

html[data-theme="glass"] .panel {
    backdrop-filter: blur(10px);
}

.row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--gap);
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--gap);
}

@media (max-width:800px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

label {
    font-size: 12px;
    color: var(--muted);
}

input[type="text"],
select,
input[type="color"],
input[type="range"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #30343c;
    border-radius: 10px;
    background: #0e0f12;
    color: var(--text);
    outline: none;
}

html[data-theme="glass"] input,
html[data-theme="glass"] select {
    background: #0b0e18cc;
    border-color: #2b3048;
}

input[type="text"]:focus,
select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--ring);
}

input[type="color"] {
    padding: 0;
    height: 42px;
}

.btns {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gap);
}

button {
    padding: 10px 14px;
    border: 1px solid #3a3f4a;
    border-radius: 10px;
    background: #181a20;
    color: var(--text);
    cursor: pointer;
    transition: transform .06s ease, box-shadow .24s ease, border-color .24s ease, background .24s ease;
}

button:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(1px);
}

.btn-cyan {
    background: var(--btn-cyan);
    border-color: var(--btn-cyan);
    color: var(--btn-text-dark);
    box-shadow: 0 0 12px color-mix(in oklab, var(--btn-cyan) 60%, #000 40%);
}

.btn-lime {
    background: var(--btn-lime);
    border-color: var(--btn-lime);
    color: var(--btn-text-dark);
    box-shadow: 0 0 12px color-mix(in oklab, var(--btn-lime) 60%, #000 40%);
}

.btn-blue {
    background: var(--btn-blue);
    border-color: var(--btn-blue);
    color: var(--btn-text-light);
    box-shadow: 0 0 12px color-mix(in oklab, var(--btn-blue) 60%, #000 40%);
}

.qr {
    display: grid;
    place-items: center;
    min-height: 320px;
    padding: 16px;
    border: 1px dashed #2a2f37;
    border-radius: var(--radius);
    background: var(--qr-surface);
}

.hint {
    color: var(--muted);
    font-size: 12.5px;
    margin: 0 2px;
}

.split {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 18px;
}

@media (max-width:980px) {
    .split {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
}

.card>label b:after {
    content: "";
    display: block;
    height: 1px;
    width: 100%;
    margin-top: 8px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}