* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, sans-serif; background: #f6f6f6; color: #1e293b; }

.screen { min-height: 100vh; }
.hidden { display: none !important; }

/* Login */
#login-screen { display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-box { background: #fff; padding: 2rem; border-radius: 1rem; box-shadow: 0 4px 20px rgba(0,0,0,.08); max-width: 360px; width: 100%; }
.login-box h1 { margin: 0 0 0.5rem; font-size: 1.5rem; }
.login-hint { color: #64748b; font-size: 0.9rem; margin-bottom: 1rem; }
#login-form { display: flex; flex-direction: column; gap: 0.75rem; }
#login-form input { padding: 0.75rem 1rem; border: 1px solid #e2e8f0; border-radius: 0.5rem; font-size: 1rem; }
#login-form button { padding: 0.75rem 1rem; background: #10b981; color: #fff; border: none; border-radius: 0.5rem; font-weight: 600; cursor: pointer; }
#login-form button:hover { background: #059669; }
.error { color: #dc2626; font-size: 0.9rem; margin-top: 0.5rem; }
#login-error:empty { display: none; }

/* Admin layout */
.admin-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; background: #fff; border-bottom: 1px solid #e2e8f0; }
.admin-header h1 { margin: 0; font-size: 1.25rem; }
.logout { padding: 0.5rem 1rem; background: #f1f5f9; border: none; border-radius: 0.5rem; cursor: pointer; font-size: 0.9rem; color: #475569; }
.logout:hover { background: #e2e8f0; color: #1e293b; }

.admin-nav { display: flex; gap: 0.25rem; padding: 0.5rem 1.5rem; background: rgba(255,255,255,.9); border-bottom: 1px solid #e2e8f0; }
.nav-tab { padding: 0.5rem 1rem; background: none; border: none; border-radius: 0.5rem; cursor: pointer; font-size: 0.9rem; color: #64748b; }
.nav-tab:hover { color: #1e293b; background: #f1f5f9; }
.nav-tab.active { background: #d1fae5; color: #047857; font-weight: 500; }

.admin-main { max-width: 42rem; margin: 0 auto; padding: 1.5rem; }

/* Config tab */
.mb { margin-bottom: 1rem; }
.preview-card { display: flex; gap: 1rem; align-items: center; padding: 1rem; background: #fff; border-radius: 0.75rem; border: 1px solid #e2e8f0; margin-bottom: 1.5rem; }
.preview-emoji { font-size: 2rem; }
.preview-title { margin: 0; font-size: 1rem; }
.preview-desc { margin: 0.25rem 0 0; font-size: 0.85rem; color: #64748b; }
.preview-desc:empty { display: none; }

.config-section { background: #fff; padding: 1.5rem; border-radius: 0.75rem; border: 1px solid #e2e8f0; margin-bottom: 1.5rem; }
.config-section h2 { margin: 0 0 0.75rem; font-size: 1.1rem; }
.section-desc { font-size: 0.85rem; color: #64748b; margin-bottom: 1rem; }
.field { margin-bottom: 1rem; }
.field label { display: block; font-size: 0.9rem; font-weight: 500; color: #475569; margin-bottom: 0.25rem; }
.field input, .field textarea { width: 100%; padding: 0.6rem 0.75rem; border: 1px solid #e2e8f0; border-radius: 0.5rem; font-size: 0.95rem; }
.field input:focus, .field textarea:focus { outline: none; border-color: #10b981; box-shadow: 0 0 0 3px rgba(16,185,129,.15); }
.emoji-input { font-size: 1.5rem !important; }
.btn { padding: 0.6rem 1.25rem; border-radius: 0.5rem; font-weight: 500; cursor: pointer; border: none; }
.btn-primary { background: #10b981; color: #fff; }
.btn-primary:hover { background: #059669; }
.btn-primary.saved { background: #059669; }
.btn-secondary { background: #334155; color: #fff; }
.btn-secondary:hover { background: #1e293b; }

.preset-add { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.preset-add input { flex: 1; padding: 0.5rem 0.75rem; border: 1px solid #e2e8f0; border-radius: 0.5rem; }
#preset-list { list-style: none; padding: 0; margin: 0; }
#preset-list li { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem; background: #f8fafc; border-radius: 0.5rem; margin-bottom: 0.5rem; }
.preset-info p { margin: 0; font-size: 0.9rem; }
.preset-info small { color: #64748b; font-size: 0.8rem; }
.preset-actions { display: flex; gap: 0.5rem; }
.preset-actions button { padding: 0.4rem 0.75rem; font-size: 0.85rem; border-radius: 0.4rem; border: none; cursor: pointer; }
.preset-use { background: #10b981; color: #fff; }
.preset-use:hover { background: #059669; }
.preset-del { background: transparent; color: #94a3b8; }
.preset-del:hover { color: #dc2626; }

/* Users tab */
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.75rem; margin-bottom: 1.5rem; }
.stat-card { padding: 1rem; border-radius: 0.75rem; }
.stat-card .num { font-size: 1.5rem; font-weight: 700; }
.stat-card .label { font-size: 0.8rem; color: #64748b; }
.stat-total { background: #f1f5f9; }
.stat-free { background: #f1f5f9; }
.stat-trial { background: #fef3c7; }
.stat-paid { background: #d1fae5; }
.stat-active { background: #ede9fe; }

.table-wrap { overflow-x: auto; background: #fff; border-radius: 0.75rem; border: 1px solid #e2e8f0; }
.users-table { width: 100%; min-width: 950px; border-collapse: collapse; font-size: 0.85rem; }
.users-table th { text-align: left; padding: 0.75rem 1rem; background: #f8fafc; font-weight: 600; color: #475569; border-bottom: 1px solid #e2e8f0; }
.users-table td { padding: 0.75rem 1rem; border-bottom: 1px solid #f1f5f9; }
.users-table tr:hover td { background: #fafafa; }
.users-table code { font-size: 0.75rem; background: #f1f5f9; padding: 0.2rem 0.4rem; border-radius: 0.25rem; }
.badge { display: inline-block; padding: 0.2rem 0.5rem; border-radius: 999px; font-size: 0.75rem; font-weight: 500; }
.badge-free { background: #e2e8f0; color: #475569; }
.badge-trial { background: #fef3c7; color: #92400e; }
.badge-paid { background: #d1fae5; color: #047857; }
.loading { display: flex; justify-content: center; padding: 2rem; }
.spinner { width: 2rem; height: 2rem; border: 2px solid #e2e8f0; border-top-color: #10b981; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }