:root {
    --green: #22c55e;
    --green-dark: #15803d;
    --red: #ef4444;
    --red-dark: #b91c1c;
    --orange: #f59e0b;
    --blue: #3b82f6;
    --bg: #0f172a;
    --panel: #1e293b;
    --text: #f8fafc;
    --muted: #94a3b8;
    --border: #334155;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
}

/* ---------- Header ---------- */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 20px 28px;
    background: linear-gradient(135deg, #111827, #1e293b);
    border-bottom: 1px solid var(--border);
}

.brand h1 {
    margin: 0;
    font-size: 1.6rem;
    letter-spacing: 0.5px;
}

.brand p {
    margin: 6px 0 0;
    color: var(--muted);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.topbar-right #editBtn {
    min-width: 90px;
    min-height: 54px;
    border-radius: 10px;
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 0 16px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.topbar-right #editBtn:hover {
    border-color: var(--blue);
}

.stats {
    display: flex;
    align-items: center;
    gap: 14px;
}

.stat {
    text-align: center;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 16px;
    min-width: 90px;
}

.stat span {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
}

.stat label {
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--muted);
    letter-spacing: 0.5px;
}

/* ---------- Controls ---------- */
.controls[hidden] {
    display: none;
}

.controls {
    padding: 16px 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.legend {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 0.85rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    display: inline-block;
}

.dot.available { background: var(--green); }
.dot.sold      { background: var(--red); }
.dot.pending   { background: var(--orange); }
.dot.selected  { background: var(--blue); }

.zoom {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.zoom button {
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
}

.zoom button:hover {
    border-color: var(--blue);
}

#zoomLevel {
    min-width: 44px;
    text-align: center;
    color: var(--muted);
    font-weight: 600;
}

.auto-wrap {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.auto-fields {
    display: flex;
    align-items: center;
    gap: 6px;
}

.auto-wrap input {
    width: 110px;
    padding: 10px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #0b1220;
    color: var(--text);
    font: inherit;
}

.auto-wrap .mul {
    color: var(--muted);
}

.auto-error {
    color: var(--red);
    font-size: 0.8rem;
    text-align: right;
    max-width: 320px;
}

.auto-error[hidden] {
    display: none;
}

.ghost-btn {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
}

.ghost-btn:hover {
    border-color: var(--blue);
}

.hint {
    width: 100%;
    color: var(--muted);
    font-size: 0.8rem;
}

.selection-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    width: 100%;
    background: var(--panel);
    border: 1px solid var(--blue);
    padding: 10px 16px;
    border-radius: 10px;
}

.selection-bar[hidden] {
    display: none;
}

.primary {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: var(--blue);
    color: #fff;
    cursor: pointer;
    font-weight: 600;
    font: inherit;
}

.primary:hover {
    background: #2563eb;
}

#clearBtn {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font: inherit;
}

/* ---------- Grid ---------- */
main {
    padding: 0 28px 60px;
}

.canvas-wrap {
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #0b1220;
    max-height: calc(100vh - 230px);
}

.grid-stage {
    position: relative;
    width: fit-content;
}

#grid {
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.grid-lines {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.18) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
}

.ad-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.ad-layer img {
    position: absolute;
    display: block;
    object-fit: fill;
}

.loading {
    text-align: center;
    color: var(--muted);
    padding: 24px;
}

.loading[hidden] {
    display: none;
}

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

.small {
    font-size: 0.8rem;
}

a {
    color: #60a5fa;
}

/* ---------- Tooltip ---------- */
.tooltip {
    position: fixed;
    pointer-events: none;
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 8px;
    font-size: 0.8rem;
    z-index: 40;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.tooltip[hidden] {
    display: none;
}

/* ---------- Modal ---------- */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

.modal[hidden] {
    display: none;
}

.modal-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    width: min(480px, 92vw);
    position: relative;
    max-height: 90vh;
    overflow: auto;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 14px;
    background: none;
    border: none;
    color: var(--muted);
    font-size: 1.6rem;
    cursor: pointer;
    line-height: 1;
}

.modal h2 {
    margin-top: 0;
}

.summary {
    background: #0b1220;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    margin: 16px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary > div {
    display: flex;
    justify-content: space-between;
}

.summary .total {
    border-top: 1px solid var(--border);
    padding-top: 8px;
    font-weight: 700;
    font-size: 1.1rem;
}

.summary .key {
    font-family: 'Courier New', monospace;
    word-break: break-all;
    color: #60a5fa;
}

.field {
    margin-bottom: 12px;
}

.field label {
    display: block;
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 4px;
}

.field input {
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #0b1220;
    color: var(--text);
    font: inherit;
}

.field canvas {
    display: block;
    border-radius: 8px;
    margin-bottom: 8px;
}

.key-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.key-row .key {
    flex: 1;
    min-width: 0;
    text-align: right;
}

#copyKeyBtn {
    flex-shrink: 0;
    padding: 6px 10px;
    font-size: 0.8rem;
}

.captcha-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.captcha-label {
    color: var(--muted);
    font-size: 0.85rem;
    white-space: nowrap;
}

.captcha-row input {
    flex: 1;
    min-width: 0;
}

.captcha-error {
    color: var(--red);
    font-size: 0.8rem;
    margin-top: 6px;
}

.captcha-error[hidden] {
    display: none;
}

#paymentElement {
    min-height: 44px;
    padding: 10px 12px;
    background: #0b1220;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.upload-row {
    display: flex;
    gap: 8px;
}

.upload-row input {
    flex: 1;
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 12px 20px;
    border-radius: 10px;
    z-index: 60;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    max-width: 90vw;
}

.toast[hidden] {
    display: none;
}

.toast.error { border-color: var(--red); }
.toast.success { border-color: var(--green); }