:root {
    --primary-color: #a78bfa;
    --secondary-color: #38bdf8;
}

/* ===== THEMES ===== */

[data-theme="aurora"] {
    --grad-1: #0f0c29;
    --grad-2: #302b63;
    --grad-3: #24243e;

    --blob-1: rgba(102, 51, 255, 0.45);
    --blob-2: rgba(0, 200, 255, 0.35);
    --blob-3: rgba(255, 51, 153, 0.3);

    --primary: #a78bfa;
    --primary-glow: rgba(167, 139, 250, 0.4);

    --text: #e2e8f0;
    --text-muted: #94a3b8;

    --glass-bg: rgba(255, 255, 255, 0.07);
    --glass-border: rgba(255, 255, 255, 0.16);
    --glass-shadow: rgba(0, 0, 0, 0.45);

    --input-bg: rgba(255, 255, 255, 0.08);
    --input-border: rgba(255, 255, 255, 0.16);
    --input-focus: rgba(167, 139, 250, 0.4);

    --btn-grad: linear-gradient(135deg, #7c3aed, #2563eb);
    --btn-hover: linear-gradient(135deg, #6d28d9, #1d4ed8);
}

[data-theme="neon"] {
    --grad-1: #05070c;
    --grad-2: #0f172a;
    --grad-3: #030712;

    --blob-1: rgba(0, 255, 136, 0.35);
    --blob-2: rgba(0, 200, 255, 0.28);
    --blob-3: rgba(255, 0, 200, 0.22);

    --primary: #00ff88;
    --primary-glow: rgba(0, 255, 136, 0.45);

    --text: #d1fae5;
    --text-muted: #6ee7b7;

    --glass-bg: rgba(0, 255, 136, 0.05);
    --glass-border: rgba(0, 255, 136, 0.2);
    --glass-shadow: rgba(0, 0, 0, 0.6);

    --input-bg: rgba(0, 255, 136, 0.06);
    --input-border: rgba(0, 255, 136, 0.16);
    --input-focus: rgba(0, 255, 136, 0.35);

    --btn-grad: linear-gradient(135deg, #00c96a, #00aaff);
    --btn-hover: linear-gradient(135deg, #00aa55, #0088dd);
}

[data-theme="dark"] {
    --grad-1: #111111;
    --grad-2: #1a1a1a;
    --grad-3: #0d0d0d;

    --blob-1: rgba(90, 90, 90, 0.45);
    --blob-2: rgba(60, 60, 80, 0.35);
    --blob-3: rgba(100, 60, 60, 0.3);

    --primary: #d4d4d4;
    --primary-glow: rgba(212, 212, 212, 0.25);

    --text: #e5e7eb;
    --text-muted: #a1a1aa;

    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.6);

    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: rgba(212, 212, 212, 0.22);

    --btn-grad: linear-gradient(135deg, #404040, #262626);
    --btn-hover: linear-gradient(135deg, #525252, #404040);
}

[data-theme="candy"] {
    --grad-1: #ff9a9e;
    --grad-2: #fecfef;
    --grad-3: #ffecd2;

    --blob-1: rgba(255, 100, 150, 0.4);
    --blob-2: rgba(255, 200, 100, 0.35);
    --blob-3: rgba(100, 200, 255, 0.3);

    --primary: #e91e8c;
    --primary-glow: rgba(233, 30, 140, 0.35);

    --text: #2d1b69;
    --text-muted: #6d28d9;

    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-border: rgba(255, 255, 255, 0.66);
    --glass-shadow: rgba(233, 30, 140, 0.18);

    --input-bg: rgba(255, 255, 255, 0.62);
    --input-border: rgba(233, 30, 140, 0.25);
    --input-focus: rgba(233, 30, 140, 0.4);

    --btn-grad: linear-gradient(135deg, #e91e8c, #ff6b35);
    --btn-hover: linear-gradient(135deg, #c2185b, #e64a19);
}

/* ===== RESET ===== */

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

/* ===== BODY ===== */

body {
    font-family: "Poppins", sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--grad-1), var(--grad-2), var(--grad-3));
    color: var(--text);
    overflow-x: hidden;
    position: relative;
    transition: background 0.6s ease;
    padding: 24px 18px;
}

/* ===== LAYOUT ===== */

.container {
    max-width: 1120px;
    width: 100%;
    margin: 28px auto;
}

.split-layout {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 24px;
}

/* ===== GLASS CARD ===== */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(18px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 8px 30px var(--glass-shadow);
}

/* ===== TEXT ===== */

.head {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subhead {
    color: var(--text-muted);
}

/* ===== INPUTS ===== */

input,
select {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 12px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text);
}

input:focus,
select:focus {
    outline: none;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 5px var(--primary-color);
}

/* ===== BUTTON ===== */

button {
    background: var(--btn-grad);
    color: #fff;
    border: none;
    padding: 11px 16px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
}

button:hover {
    filter: brightness(1.05);
}

/* ===== QR ===== */

#qrcode {
    width: 200px;
    height: 200px;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ===== OPTIONS ===== */

.qr-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.option {
    flex-basis: calc(50% - 6px);
}

/* ===== ACTIONS ===== */

.qr-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.qr-actions button {
    flex: 1;
}

/* ===== THEME BAR ===== */

.theme-bar {
    position: fixed;
    top: 16px;
    right: 20px;
    display: flex;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 900px) {
    .split-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .qr-actions {
        flex-direction: column;
    }

    .option {
        flex-basis: 100%;
    }
}