:root {
  --green-dark: #1e5b3a;
  --green: #1f7a4d;
  --green-light: #e9f7ee;
  --purple: #6a4fd8;
  --blue: #3b5fe0;
  --dark: #1f2733;
  --gray: #6b7280;
  --border: #e2e5ea;
  --bg: #eef8f1;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--dark);
}

.topbar {
  background: var(--green-dark);
  color: #fff;
  text-align: center;
  padding: 20px 16px 24px;
}
.topbar-logo {
  width: 64px; height: 64px; border-radius: 50%;
  object-fit: cover; margin-bottom: 10px; border: 3px solid #fff;
}
.topbar h1 { margin: 0; font-size: 20px; letter-spacing: .5px; }

.tabbar {
  display: flex; flex-wrap: wrap; gap: 8px;
  max-width: 1100px; margin: -18px auto 0; padding: 0 16px;
}
.tab-btn {
  background: #dff3e6; color: var(--green-dark);
  border: 1px solid transparent; border-radius: 8px 8px 0 0;
  padding: 12px 18px; font-weight: 600; cursor: pointer;
  text-decoration: none; font-size: 14px;
}
.tab-btn.active { background: #fff; border-color: var(--border); border-bottom-color: #fff; }
.tab-spacer { flex: 1; }
.tab-btn.admin-btn { background: var(--purple); color: #fff; border-radius: 8px; }

.content {
  max-width: 1100px; margin: 0 auto; background: #fff;
  border: 1px solid var(--border); border-radius: 0 0 12px 12px;
  padding: 24px; min-height: 400px;
}

.toolbar { display: flex; gap: 12px; margin-bottom: 20px; }
.toolbar input[type=text] {
  flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
}
.toolbar select { padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }

.main-grid { display: grid; grid-template-columns: 220px 1fr; gap: 24px; }
.sidebar h3 { font-size: 13px; color: var(--gray); margin: 16px 0 8px; }
.sidebar h3:first-child { margin-top: 0; }
.full-width { width: 100%; }

.shape-btn {
  display: block; width: 100%; padding: 10px; margin-bottom: 8px;
  border: none; border-radius: 8px; color: #fff; background: var(--dark);
  font-weight: 600; cursor: pointer; font-size: 13px;
}
.shape-btn.active { background: var(--green); }

.card-preview-wrap {
  background: #e7e9ee; border-radius: 12px; min-height: 500px;
  display: flex; align-items: center; justify-content: center; position: relative;
}
#cardCanvas { max-width: 100%; max-height: 560px; border-radius: 8px; display: none; }
.card-placeholder { color: var(--gray); font-size: 15px; }

.btn {
  border: none; border-radius: 8px; padding: 12px 20px; font-weight: 600;
  cursor: pointer; font-size: 14px; color: #fff;
}
.btn-green { background: var(--green); }
.btn-blue { background: var(--blue); }
.btn-purple { background: var(--purple); }
.btn-dark { background: var(--dark); }
.btn-gray { background: var(--gray); }
.btn-red { background: #c0392b; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.admin-panel { margin-top: 32px; border-top: 1px solid var(--border); padding-top: 20px; }
.subtabs { display: flex; gap: 20px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.subtab-btn {
  background: none; border: none; padding: 10px 4px; font-size: 14px; color: var(--gray);
  cursor: pointer; border-bottom: 2px solid transparent;
}
.subtab-btn.active { color: var(--green); border-bottom-color: var(--green); font-weight: 600; }

.form-row { display: flex; gap: 20px; margin-bottom: 14px; }
.form-col { flex: 1; }
.form-col label { display: block; font-size: 12px; color: var(--gray); margin-bottom: 6px; }
.form-col input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
}
.upload-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td { text-align: left; padding: 10px; border-bottom: 1px solid var(--border); }
.data-table img { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; }
.data-table .btn { padding: 6px 10px; font-size: 12px; margin-right: 6px; }

.action-bar { display: flex; justify-content: center; gap: 12px; margin-top: 28px; }

.hint { font-size: 13px; color: var(--gray); }

/* Login / install pages */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: #fff; padding: 32px; border-radius: 12px; max-width: 380px; width: 100%;
  box-shadow: 0 8px 24px rgba(0,0,0,.08); text-align: center;
}
.login-card h1 { font-size: 16px; color: var(--green-dark); }
.login-card h2 { font-size: 20px; margin-bottom: 20px; }
.login-card form { text-align: left; }
.login-card label { display: block; font-size: 13px; margin: 10px 0 4px; color: var(--gray); }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; }
.login-card .btn { width: 100%; margin-top: 18px; }
.back-link { display: inline-block; margin-top: 16px; font-size: 13px; color: var(--gray); }
.alert { padding: 10px; border-radius: 8px; font-size: 13px; margin-bottom: 10px; }
.alert-error { background: #fdecea; color: #c0392b; }
.alert-success { background: var(--green-light); color: var(--green-dark); }

/* Modal */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4);
  align-items: center; justify-content: center; z-index: 50;
}
.modal-overlay.show { display: flex; }
.modal-box { background: #fff; border-radius: 12px; padding: 24px; width: 420px; max-width: 92vw; max-height: 85vh; overflow-y: auto; }
.modal-box label { display: block; font-size: 13px; margin: 10px 0 4px; color: var(--gray); }
.modal-box input, .modal-box select { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; }
.modal-actions { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.sesi-list { list-style: none; padding: 0; margin: 10px 0 0; }
.sesi-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 14px;
}
.sesi-list button { background: none; border: none; color: var(--blue); cursor: pointer; font-size: 13px; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--dark); color: #fff; padding: 12px 20px; border-radius: 8px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: #c0392b; }

@media (max-width: 720px) {
  .main-grid { grid-template-columns: 1fr; }
  .sidebar { display: flex; flex-wrap: wrap; gap: 8px; }
  .sidebar h3 { width: 100%; }
  .form-row { flex-direction: column; }
}