:root {
    --wa-green: #25d366;
    --wa-dark: #075e54;
    --wa-teal: #128c7e;
    --bg: #e8edf2;
    --card: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --info: #0ea5e9;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    --radius: 14px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(160deg, #dcf8c6 0%, var(--bg) 35%, #f1f5f9 100%);
    color: var(--text);
    min-height: 100vh;
    padding: 1.5rem;
}

.container { max-width: 1180px; margin: 0 auto; }

.page-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.page-header .logo {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--wa-green), var(--wa-teal));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: var(--shadow);
}

.page-header h1 { margin: 0; font-size: 1.65rem; color: var(--wa-dark); }
.page-header p { margin: 0.2rem 0 0; color: var(--muted); font-size: 0.95rem; }

.card {
    background: var(--card);
    padding: 1.75rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.card h2 {
    margin: 0 0 1.25rem;
    font-size: 1.15rem;
    color: var(--wa-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h2::before {
    content: '';
    width: 4px;
    height: 1.1rem;
    background: var(--wa-green);
    border-radius: 2px;
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }

.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    margin-bottom: 0.45rem;
    font-weight: 600;
    font-size: 0.88rem;
    color: #334155;
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fafbfc;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--wa-green);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.15);
    background: #fff;
}

textarea { min-height: 90px; resize: vertical; font-family: ui-monospace, monospace; font-size: 0.85rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.55rem 1rem;
    border: none;
    border-radius: 9px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
    white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--wa-green); color: #fff; }
.btn-info { background: var(--info); color: #fff; }
.btn-dark { background: #1e293b; color: #fff; }
.btn-edit { background: #f59e0b; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: #f1f5f9; color: #475569; border: 1px solid var(--border); }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }
.btn-group { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }

.table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
thead { background: linear-gradient(180deg, #f8fafc, #f1f5f9); }
th {
    text-align: left;
    padding: 0.85rem 1rem;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
    font-weight: 700;
    border-bottom: 2px solid var(--border);
}
td { padding: 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
tbody tr:hover { background: #f8fffe; }
tbody tr:last-child td { border-bottom: none; }

.client-id { font-weight: 700; color: var(--wa-dark); }
.badge { display: inline-block; padding: 0.25rem 0.65rem; border-radius: 999px; font-size: 0.78rem; font-weight: 700; }
.badge-ready { background: #dcfce7; color: #166534; }
.badge-pending { background: #ffedd5; color: #9a3412; }
.badge-conflict { background: #fee2e2; color: #b91c1c; }
.badge-type { background: #e0f2fe; color: #0369a1; }

.api-key { display: flex; align-items: center; gap: 0.4rem; }
.api-key code {
    font-size: 0.72rem;
    background: #f1f5f9;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
    word-break: break-all;
    flex: 1;
}

.qr-card {
    text-align: center;
    padding: 0.75rem;
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    background: #fafbfc;
}
.qr-card p { margin: 0 0 0.5rem; font-size: 0.82rem; color: var(--muted); }
.qr-card img { max-width: 180px; border-radius: 8px; }

.hint { font-size: 0.78rem; color: var(--muted); margin-top: 0.35rem; }
.doc-block {
    background: #f8fafc;
    padding: 1.25rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    margin-top: 1rem;
}
.doc-block pre {
    white-space: pre-wrap;
    word-break: break-all;
    background: #e2e8f0;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.82rem;
    margin: 0.5rem 0 0;
}
.doc-block ul { margin: 0.5rem 0 0; padding-left: 1.25rem; color: #475569; }

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.modal-overlay.open { display: flex; }
.modal {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.modal-header h3 { margin: 0; color: var(--wa-dark); font-size: 1.1rem; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--muted); }
.modal-body { padding: 1.5rem; }
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.5rem; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; font-weight: 500; font-size: 0.88rem; }
.warning-text { color: #b91c1c; font-size: 0.82rem; margin: 0 0 0.5rem; max-width: 280px; }
.input-readonly { background: #f1f5f9; cursor: not-allowed; }