:root {
  --bg: #0b0d12;
  --bg-elev: #12151c;
  --bg-elev-2: #191d27;
  --border: #262b36;
  --text: #eef0f4;
  --text-dim: #9aa2b1;
  --accent: #6c5ce7;
  --accent-2: #00d4b5;
  --danger: #ff5470;
  --success: #2ecc71;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  font-size: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1a1030 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-2); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .4em; }
p { color: var(--text-dim); margin: 0 0 1em; }
.hidden { display: none !important; }

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(11,13,18,0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 1.1rem; white-space: nowrap; }
.brand-dot { width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 0 14px var(--accent); }
.brand-name strong { color: var(--accent-2); font-weight: 700; }
.brand-tagline {
  font-size: 0.72rem; color: var(--text-dim); border-left: 1px solid var(--border);
  padding-left: 10px; margin-left: 2px; letter-spacing: 0.02em;
}
@media (max-width: 560px) { .brand-tagline { display: none; } }

.topbar-stats { display: flex; gap: 20px; margin-left: auto; }
.stat { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; }
.stat-value { font-weight: 700; font-size: 0.95rem; }
.stat-label { font-size: 0.7rem; color: var(--text-dim); }

.topbar-auth { display: flex; align-items: center; gap: 10px; }
.user-chip { display: flex; align-items: center; gap: 10px; background: var(--bg-elev); border: 1px solid var(--border); padding: 6px 10px; border-radius: 999px; font-size: 0.85rem; }
.user-balance { color: var(--accent-2); font-weight: 700; }

/* Buttons */
.btn {
  border: none; cursor: pointer; border-radius: 10px;
  padding: 10px 18px; font-size: 0.9rem; font-weight: 600;
  transition: transform .12s ease, opacity .12s ease, background .15s ease;
  font-family: inherit;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: linear-gradient(135deg, var(--accent), #8e6ef0); color: white; }
.btn-primary:hover { opacity: 0.92; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.icon-btn {
  width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--text); cursor: pointer; font-size: 1rem;
}
.icon-btn:hover { border-color: var(--accent); }

/* Hero */
.hero { max-width: 900px; margin: 56px auto 32px; padding: 0 20px; text-align: center; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.8rem); }
.accent { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { font-size: 1.05rem; max-width: 560px; margin-inline: auto; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }

/* Grid section */
.grid-section { max-width: 1200px; margin: 0 auto 40px; padding: 0 20px; }
.grid-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px; flex-wrap: wrap; gap: 10px;
}
.toolbar-left { display: flex; align-items: center; gap: 8px; }
.zoom-label { font-size: 0.85rem; color: var(--text-dim); min-width: 42px; text-align: center; }
.hint { font-size: 0.8rem; color: var(--text-dim); }

.mode-toggle { display: flex; gap: 4px; background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 10px; padding: 4px; }
.mode-btn {
  border: none; background: transparent; color: var(--text-dim); cursor: pointer;
  padding: 7px 14px; border-radius: 7px; font-size: 0.82rem; font-weight: 600; font-family: inherit;
}
.mode-btn.active { background: var(--accent); color: white; }

.canvas-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  background: #05060a;
  box-shadow: var(--shadow);
  touch-action: pan-x pan-y;
  height: min(75vh, 720px);
}
.canvas-wrap.mode-select { touch-action: none; }
#gridCanvas { display: block; image-rendering: pixelated; touch-action: inherit; }
#gridCanvas.cursor-select { cursor: crosshair; }
#gridCanvas.cursor-browse { cursor: grab; }
.canvas-empty-hint {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: 0.9rem; pointer-events: none;
}

/* How it works */
.how { max-width: 1100px; margin: 0 auto 60px; padding: 0 20px; text-align: center; }
.how-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 24px; }
.how-card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; text-align: left;
}
.how-num {
  width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12; font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 10px;
}
.how-card h3 { font-size: 1rem; }
.how-card p { font-size: 0.85rem; margin: 0; }

.site-footer { text-align: center; padding: 30px 20px 60px; color: var(--text-dim); font-size: 0.8rem; }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(5,6,10,0.7); backdrop-filter: blur(4px);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 16px;
}
.modal-overlay.open { display: flex; }
.modal {
  position: relative; width: 100%; max-width: 420px; background: var(--bg-elev);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow); max-height: 90vh; overflow-y: auto;
}
.modal-close {
  position: absolute; top: 14px; right: 14px; background: transparent; border: none;
  color: var(--text-dim); font-size: 1.1rem; cursor: pointer;
}
.modal-close:hover { color: var(--text); }

.auth-tabs { display: flex; gap: 6px; margin-bottom: 18px; background: var(--bg-elev-2); border-radius: 10px; padding: 4px; }
.auth-tab { flex: 1; padding: 8px; border: none; background: transparent; color: var(--text-dim); border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 0.85rem; }
.auth-tab.active { background: var(--accent); color: white; }

.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.82rem; color: var(--text-dim); }
.auth-form input {
  background: var(--bg-elev-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; color: var(--text); font-size: 0.95rem; font-family: inherit;
}
.auth-form input:focus { outline: none; border-color: var(--accent); }
.form-error { color: var(--danger); font-size: 0.82rem; min-height: 1em; }

.wallet-balance { font-size: 1rem; }
.wallet-balance strong { color: var(--accent-2); font-size: 1.3rem; }

.wallet-step { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; }
.wallet-step-num {
  flex: none; width: 24px; height: 24px; border-radius: 50%;
  background: var(--bg-elev-2); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: var(--accent-2);
}
.wallet-step strong { display: block; font-size: 0.88rem; margin-bottom: 2px; }
.wallet-step p { font-size: 0.78rem; margin: 0 0 8px; }

.my-requests { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 14px; }
.my-requests h3 { font-size: 0.85rem; margin: 0 0 10px; color: var(--text-dim); }
.req-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.85rem; padding: 8px 10px; border-radius: 8px; background: var(--bg-elev-2); margin-bottom: 6px;
}
.req-status { font-size: 0.72rem; padding: 3px 8px; border-radius: 999px; }
.req-pending .req-status { background: rgba(255,196,0,0.15); color: #ffd166; }
.req-approved .req-status { background: rgba(46,204,113,0.15); color: var(--success); }
.req-rejected .req-status { background: rgba(255,84,112,0.15); color: var(--danger); }
.quick-amounts { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: var(--bg-elev-2); border: 1px solid var(--border); color: var(--text); padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 0.8rem; }
.chip:hover { border-color: var(--accent); }
.fine-print { font-size: 0.72rem; color: var(--text-dim); margin: -4px 0 0; }

.purchase-summary { display: flex; justify-content: space-between; background: var(--bg-elev-2); border-radius: 10px; padding: 14px; margin-bottom: 16px; gap: 10px; }
.purchase-summary div { display: flex; flex-direction: column; gap: 4px; font-size: 0.7rem; color: var(--text-dim); }
.purchase-summary strong { font-size: 0.95rem; color: var(--text); }
.p-preview { width: 100%; border-radius: 8px; margin-top: -4px; border: 1px solid var(--border); max-height: 160px; object-fit: contain; background: #05060a; }

/* Popover for block hover/tap */
.popover {
  position: fixed; z-index: 90; background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: var(--shadow); padding: 10px; width: 220px; display: none;
  pointer-events: none;
}
.popover.open { display: block; pointer-events: auto; }
.popover img { width: 100%; border-radius: 6px; display: block; margin-bottom: 8px; background: #05060a; }
.pop-title { font-weight: 700; font-size: 0.85rem; margin-bottom: 4px; }
.pop-body a { font-size: 0.78rem; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg-elev); border: 1px solid var(--border); padding: 12px 20px; border-radius: 10px;
  box-shadow: var(--shadow); font-size: 0.85rem; opacity: 0; pointer-events: none; transition: all .25s ease;
  z-index: 200; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: var(--danger); color: #ffb3c0; }
.toast.success { border-color: var(--success); color: #b7f7cf; }

@media (max-width: 720px) {
  .topbar-stats { display: none; }
  .how-grid { grid-template-columns: 1fr 1fr; }
  .canvas-wrap { height: 65vh; }
}
@media (max-width: 420px) {
  .how-grid { grid-template-columns: 1fr; }
}