* { box-sizing: border-box; }

:root {
    --bg: #0f1115;
    --panel: #171a21;
    --panel-2: #1e2129;
    --border: #2a2e38;
    --border-strong: #3a3f4c;
    --text: #eceef2;
    --text-dim: #9298a6;
    --accent: #7c5cff;
    --accent-2: #22d3c5;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background:
        radial-gradient(1200px 600px at 15% -10%, rgba(124,92,255,0.18), transparent 60%),
        radial-gradient(1000px 500px at 100% 0%, rgba(34,211,197,0.12), transparent 55%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 32px 20px 64px; }

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}
.site-header h1 {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, #fff, #b9b3ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.site-header h1::before {
    content: "◇ ";
    -webkit-text-fill-color: var(--accent);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    background: var(--panel-2);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color .15s ease, transform .1s ease;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: scale(0.97); }

.layout { display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap; }

.panel {
    flex: 1 1 400px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
}

.preview {
    flex: 0 0 300px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    min-height: 320px;
    position: sticky;
    top: 24px;
}
.preview-label {
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-dim);
}
#qr-canvas {
    background: #fff;
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}
#qr-canvas canvas, #qr-canvas img { display: block; border-radius: 4px; }

.tabs {
    flex: 0 0 150px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--panel-2);
    color: var(--text-dim);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all .15s ease;
}
.tab:hover { color: var(--text); border-color: var(--border-strong); }
.tab.active {
    background: linear-gradient(135deg, var(--accent), #5a3fe0);
    color: #fff;
    border-color: transparent;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade .15s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: translateY(0); } }

label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .02em;
    color: var(--text-dim);
    margin: 14px 0 6px;
}
input[type="text"], input[type="url"], input[type="email"], textarea, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    background: var(--panel-2);
    color: var(--text);
    transition: border-color .15s ease;
}
input::placeholder, textarea::placeholder { color: #565c6b; }
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
}

input[type="color"] {
    width: 100%;
    height: 42px;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--panel-2);
    cursor: pointer;
}
input[type="file"] {
    width: 100%;
    font-size: 13px;
    color: var(--text-dim);
    padding: 8px 0;
}
input[type="file"]::file-selector-button {
    padding: 7px 12px;
    margin-right: 10px;
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    background: var(--panel-2);
    color: var(--text);
    cursor: pointer;
}

hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

.style-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }

.actions { display: flex; gap: 10px; margin-top: 24px; }
.actions .btn { flex: 1; justify-content: center; }
#save-btn { background: var(--panel-2); }
#download-btn {
    background: linear-gradient(135deg, var(--accent-2), #16a89c);
    border-color: transparent;
    color: #04211d;
    font-weight: 600;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}
.history-table th {
    text-align: left;
    padding: 12px 14px;
    background: var(--panel-2);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-dim);
}
.history-table td {
    text-align: left;
    padding: 12px 14px;
    border-top: 1px solid var(--border);
    font-size: 13px;
}
.history-table tr:hover td { background: rgba(124,92,255,0.06); }
.history-table a { color: #ff8e8e; text-decoration: none; }
.history-table .truncate { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-dim); }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 4px; margin-right: 6px; vertical-align: middle; border: 1px solid var(--border-strong); }