* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0a0a0f; --bg2: #15151f; --bg3: #1f1f2e;
  --primary: #00ff88; --primary-dim: #00cc6a;
  --text: #f0f0f0; --text-dim: #a0a0b0;
  --danger: #ff4d6d; --warning: #ffa500;
  --border: rgba(255,255,255,0.1);
  --radius: 12px;
}
html, body { background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; min-height: 100vh; }
body { padding-bottom: env(safe-area-inset-bottom); }
a { color: var(--primary); text-decoration: none; }
input, select, textarea, button { font-family: inherit; font-size: 16px; }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 20px; border: none; border-radius: var(--radius); cursor: pointer; transition: all 0.2s; font-weight: 600; }
.btn-primary { background: var(--primary); color: #000; }
.btn-primary:hover { background: var(--primary-dim); }
.btn-secondary { background: var(--bg3); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg2); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert.error { background: rgba(255,77,109,0.15); color: var(--danger); border: 1px solid rgba(255,77,109,0.3); }
.alert.success { background: rgba(0,255,136,0.15); color: var(--primary); border: 1px solid rgba(0,255,136,0.3); }
.alert.info { background: rgba(100,150,255,0.15); color: #88aaff; border: 1px solid rgba(100,150,255,0.3); }

/* Login */
.login-body { display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-container { width: 100%; max-width: 380px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 24px; }
.login-title { font-size: 28px; text-align: center; margin-bottom: 4px; }
.login-sub { text-align: center; color: var(--text-dim); font-size: 14px; margin-bottom: 24px; }
.login-form label { display: block; margin-bottom: 16px; font-size: 13px; color: var(--text-dim); }
.login-form input { width: 100%; padding: 12px; margin-top: 4px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.login-form input:focus { outline: none; border-color: var(--primary); }

/* Header */
.app-header { background: var(--bg2); border-bottom: 1px solid var(--border); padding: 14px 16px; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; }
.app-header h1 { font-size: 17px; }
.app-header .user-info { font-size: 12px; color: var(--text-dim); }
.app-header .user-info a { margin-left: 12px; color: var(--danger); }

/* Main */
.app-main { padding: 16px; max-width: 720px; margin: 0 auto; }

/* Dashboard cards */
.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 18px; }
.metric-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.metric-label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; margin-bottom: 4px; }
.metric-value { font-size: 24px; font-weight: 700; }
.metric-value.green { color: var(--primary); }
.metric-value.red { color: var(--danger); }
.metric-value.yellow { color: var(--warning); }

/* Nav menu */
.nav-menu { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.nav-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 16px; display: flex; align-items: center; gap: 12px; transition: all 0.2s; }
.nav-card:hover { background: var(--bg3); transform: translateY(-2px); }
.nav-icon { font-size: 28px; }
.nav-title { font-size: 14px; font-weight: 600; }

/* Tables */
.table { width: 100%; border-collapse: collapse; background: var(--bg2); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { background: var(--bg3); color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11px; }
.table tr:last-child td { border-bottom: none; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--text-dim); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* Search bar */
.search-bar { position: relative; margin-bottom: 14px; }
.search-bar input { width: 100%; padding: 12px 12px 12px 38px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.search-bar .icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-dim); }

/* Meses list */
.meses-list { display: flex; flex-direction: column; gap: 8px; margin: 16px 0; }
.mes-row { background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; padding: 12px; display: flex; align-items: center; gap: 12px; }
.mes-row.vencido { border-color: var(--danger); }
.mes-row.actual { border-color: var(--warning); }
.mes-checkbox { width: 22px; height: 22px; }
.mes-info { flex: 1; }
.mes-name { font-weight: 600; }
.mes-status { font-size: 11px; color: var(--text-dim); }
.mes-amount { font-weight: 700; color: var(--primary); }

.total-bar { background: var(--bg3); border: 2px solid var(--primary); border-radius: var(--radius); padding: 16px; display: flex; justify-content: space-between; align-items: center; margin: 16px 0; }
.total-label { font-size: 13px; color: var(--text-dim); }
.total-amount { font-size: 28px; font-weight: 700; color: var(--primary); }

.qr-box { background: white; padding: 20px; border-radius: var(--radius); text-align: center; margin: 16px 0; }

/* Badges */
.badge { display: inline-block; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge.green { background: rgba(0,255,136,0.2); color: var(--primary); }
.badge.red { background: rgba(255,77,109,0.2); color: var(--danger); }
.badge.yellow { background: rgba(255,165,0,0.2); color: var(--warning); }

/* Back link */
.back-link { display: inline-block; color: var(--text-dim); margin-bottom: 12px; font-size: 14px; }