:root {
  --bg: #f8f9fa;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --primary: #dc2626;
  --primary-dark: #b91c1c;
  --primary-glow: rgba(220,38,38,0.25);
  --accent: #f59e0b;
  --accent-glow: rgba(245,158,11,0.2);
  --text: #1a1a1a;
  --text-muted: #6b7280;
  --text-dim: #9ca3af;
  --border: rgba(0,0,0,0.08);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --green: #059669;
  --green-bg: rgba(5,150,105,0.1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family:'Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
}

.hidden { display:none !important; }

/* ===== AUTH SCREEN ===== */
.auth-screen {
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  padding:2rem 5%; background:radial-gradient(ellipse at 50% 0%, #fff5f5 0%, var(--bg) 60%);
}
.auth-card {
  width:100%; max-width:420px;
  background:var(--bg-card); border-radius:var(--radius); border:1px solid var(--border);
  padding:2rem; box-shadow:var(--shadow-lg);
}
.auth-header { text-align:center; margin-bottom:1.5rem; }
.auth-header h1 { font-family:'Inter',sans-serif; font-size:1.6rem; color:var(--text); }
.auth-header h1 span { color:var(--primary); }
.auth-header p { font-size:.85rem; color:var(--text-muted); margin-top:.3rem; }

.auth-tabs { display:flex; gap:.5rem; margin-bottom:1.5rem; background:var(--bg-elevated); padding:.3rem; border-radius:var(--radius-sm); border:1px solid var(--border); }
.auth-tab {
  flex:1; padding:.6rem; border:none; border-radius:8px; background:transparent;
  color:var(--text-muted); font-size:.85rem; font-weight:600; cursor:pointer;
  transition:all .3s; font-family:'Inter',sans-serif;
}
.auth-tab.active { background:var(--primary); color:#fff; box-shadow:0 4px 14px var(--primary-glow); }

.auth-form { display:none; }
.auth-form.active { display:block; animation:fadeIn .3s ease; }

.form-group { margin-bottom:1rem; }
.form-group label { display:block; font-size:.8rem; font-weight:600; color:var(--text-muted); margin-bottom:.4rem; text-transform:uppercase; letter-spacing:.04em; }
.form-group input, .form-group select {
  width:100%; padding:.7rem .9rem; border-radius:var(--radius-sm); border:1px solid var(--border);
  background:var(--bg-elevated); color:var(--text); font-size:.9rem; font-family:'Inter',sans-serif;
  transition:border-color .3s, box-shadow .3s;
}
.form-group input:focus, .form-group select:focus { outline:none; border-color:var(--primary); box-shadow:0 0 0 3px var(--primary-glow); }
.form-group input::placeholder { color:var(--text-dim); }
.field-hint { font-size:.75rem; color:var(--text-dim); margin-top:.3rem; }

.form-error { color:var(--primary); font-size:.8rem; margin-top:.5rem; text-align:center; }
.form-success { color:var(--green); font-size:.85rem; margin-top:.5rem; text-align:center; }
.form-note { font-size:.75rem; color:var(--text-dim); margin-top:1rem; text-align:center; }
.form-note a { color:var(--primary); }

.btn-primary {
  display:inline-flex; align-items:center; justify-content:center; gap:.4rem;
  font-size:.85rem; font-weight:600; padding:.85rem 1.4rem;
  border-radius:var(--radius-sm); border:none; background:var(--primary); color:#fff;
  cursor:pointer; transition:transform .3s, box-shadow .3s, background .3s;
  font-family:'Inter',sans-serif; text-decoration:none;
}
.btn-primary:hover { transform:translateY(-2px); background:var(--primary-dark); box-shadow:0 6px 24px rgba(220,38,38,0.4); }
.btn-full { width:100%; }
.btn-secondary {
  display:inline-flex; align-items:center; gap:.35rem;
  font-size:.82rem; font-weight:600; padding:.6rem 1.2rem;
  border-radius:var(--radius-sm); border:1.5px solid var(--border);
  background:rgba(0,0,0,0.06); color:var(--text);
  cursor:pointer; transition:all .3s; font-family:'Inter',sans-serif; text-decoration:none;
}
.btn-secondary:hover { background:rgba(0,0,0,0.1); border-color:rgba(0,0,0,0.15); }
.btn-sm { font-size:.75rem; padding:.5rem 1rem; }
.btn-text {
  background:none; border:none; color:var(--text-muted); font-size:.8rem;
  cursor:pointer; display:flex; align-items:center; gap:.4rem;
  transition:color .3s; font-family:'Inter',sans-serif;
}
.btn-text:hover { color:var(--primary); }

.btn-danger {
  background:#ef4444; border:none; color:#fff; font-size:.8rem;
  cursor:pointer; padding:.45rem .9rem; border-radius:50px;
  font-weight:500; display:flex; align-items:center; gap:.4rem;
  transition:background .3s, transform .3s; font-family:'Inter',sans-serif;
}
.btn-danger:hover { background:#dc2626; transform:translateY(-1px); }

.checkbox-group { display:flex; gap:1rem; flex-wrap:wrap; }
.checkbox { display:flex; align-items:center; gap:.4rem; cursor:pointer; font-size:.85rem; color:var(--text-muted); }
.checkbox input { width:auto; accent-color:var(--primary); }
.checkbox input:disabled { opacity:.5; }

@keyframes fadeIn { from{opacity:0;transform:translateY(8px);} to{opacity:1;transform:translateY(0);} }

/* ===== DASHBOARD ===== */
.dashboard { min-height:100vh; }
.dash-header {
  position:sticky; top:0; z-index:900;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 5%; height:60px;
  background:rgba(255,255,255,0.95); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 3px rgba(0,0,0,0.05);
}
.dash-brand a { font-family:'Inter',sans-serif; font-size:1.25rem; font-weight:800; color:var(--text); text-decoration:none; letter-spacing:-0.02em; }
.dash-brand span { color:var(--primary); font-weight:800; }
.dash-user { display:flex; align-items:center; gap:1rem; }
.dash-user span { font-size:.8rem; color:var(--text-muted); display:none; }

.dash-section { padding:1.5rem 5%; max-width:900px; margin:0 auto; border-bottom:1px solid var(--border); }
.dash-title {
  font-family:'Inter',sans-serif; font-size:1.1rem; color:var(--text);
  margin-bottom:1rem; display:flex; align-items:center; gap:.5rem;
}
.dash-title i { color:var(--primary); font-size:.9rem; }

/* Subscription */
.sub-card { background:var(--bg-card); border-radius:var(--radius); padding:1.25rem; border:1px solid var(--border); box-shadow:var(--shadow); }
.sub-badge { display:inline-flex; align-items:center; gap:.4rem; font-size:.8rem; font-weight:600; padding:.35rem .8rem; border-radius:50px; margin-bottom:.5rem; }
.sub-badge.active { background:var(--green-bg); color:var(--green); }
.sub-badge.inactive { background:rgba(220,38,38,0.1); color:var(--primary); }
.sub-card p { font-size:.85rem; color:var(--text-muted); margin-bottom:.75rem; }

/* Config form */
.config-form .form-row { display:grid; grid-template-columns:1fr; gap:1rem; margin-bottom:.5rem; }
.config-form button { margin-top:.5rem; }

/* Deadlines */
.deadlines-empty { text-align:center; padding:2rem; color:var(--text-dim); }
.deadlines-empty i { font-size:2rem; margin-bottom:.5rem; }
.deadlines-list { display:flex; flex-direction:column; gap:.6rem; }
.deadline-item {
  display:flex; align-items:center; justify-content:space-between;
  background:var(--bg-card); border-radius:var(--radius-sm); padding:1rem 1.25rem;
  border:1px solid var(--border); border-left:3px solid var(--primary);
  box-shadow:var(--shadow);
}
.deadline-item.urgent { border-left-color:var(--primary); }
.deadline-item.warning { border-left-color:var(--accent); }
.deadline-item.ok { border-left-color:var(--green); }
.deadline-info h4 { font-size:.9rem; color:var(--text); margin-bottom:.15rem; }
.deadline-info p { font-size:.75rem; color:var(--text-muted); }
.deadline-date { text-align:right; }
.deadline-date .d-days { font-size:1.2rem; font-weight:700; color:var(--primary); }
.deadline-date .d-date { font-size:.75rem; color:var(--text-muted); }

/* Alerts history */
.alerts-list { background:var(--bg-card); border-radius:var(--radius); border:1px solid var(--border); padding:1rem; box-shadow:var(--shadow); }
.empty-state { text-align:center; color:var(--text-dim); font-size:.85rem; padding:1rem; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:var(--bg); }
::-webkit-scrollbar-thumb { background:var(--text-dim); border-radius:4px; }
::-webkit-scrollbar-thumb:hover { background:var(--primary); }

/* ===== SOPORTE ===== */
.support-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-align: center;
}
.support-card p {
  color: var(--text-muted);
  font-size: .9rem;
  margin-bottom: 1rem;
}
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: #25d366;
  color: #fff;
  font-weight: 600;
  padding: .75rem 1.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-size: .9rem;
  transition: transform .2s, box-shadow .2s;
  font-family: 'Inter', sans-serif;
}
.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.35);
}
.btn-whatsapp i { font-size: 1.1rem; }

.how-to-use {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
}
.how-to-use h3 {
  font-size: .95rem;
  font-weight: 700;
  margin-bottom: .75rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.how-to-step {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  margin-bottom: .5rem;
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.how-to-step:last-child { margin-bottom: 0; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: .75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: .05rem;
}
.how-to-step strong { color: var(--text); }

.wa-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.wa-preview-header {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: .75rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.wa-preview-header i { color: #25d366; font-size: 1rem; }
.wa-preview-bubble {
  background: #fff;
  border: 1px solid rgba(0,0,0,0.06);
  border-left: 4px solid #25d366;
  border-radius: 0 12px 12px 12px;
  padding: 1rem;
  max-width: 480px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.wa-preview-name {
  font-size: .75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: .4rem;
  text-transform: uppercase;
  letter-spacing: .02em;
}
.wa-preview-body {
  font-size: .85rem;
  color: var(--text);
  line-height: 1.6;
}
.wa-preview-body p { margin-bottom: .5rem; }
.wa-preview-body a { color: #039be5; text-decoration: none; }
.wa-preview-time {
  font-size: .7rem;
  color: var(--text-dim);
  text-align: right;
  margin-top: .3rem;
}
.wa-preview-note {
  font-size: .75rem;
  color: var(--text-muted);
  margin-top: .75rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.wa-preview-note i { color: var(--primary); font-size: .8rem; }


.btn-support {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: #25d366;
  color: #fff;
  font-size: .78rem;
  font-weight: 600;
  padding: .4rem .85rem;
  border-radius: 50px;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s;
  white-space: nowrap;
}
.btn-support:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,211,102,.35);
}
.btn-support i { font-size: .9rem; }

/* ===== OUTPUT PREVIEW ===== */
.output-preview {
  max-width: 380px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  padding: 1.5rem;
  font-family: 'Inter', sans-serif;
  border: 1px solid rgba(0,0,0,0.04);
}
.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--primary);
}
.preview-title {
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  letter-spacing: -0.01em;
}
.preview-title i { font-size: 0.9rem; }
.preview-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}
.preview-row { margin-bottom: 0.85rem; }
.preview-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
  font-weight: 600;
}
.preview-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.preview-box {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 1rem;
  margin-top: 0.75rem;
  border: 1px solid rgba(0,0,0,0.04);
}
.preview-box-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}
.preview-box-row:not(:last-child) { margin-bottom: 0.5rem; }
.preview-box-label { font-weight: 600; color: var(--text); }
.preview-box-value { font-weight: 700; color: var(--text); }
.preview-box-total {
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 0.5rem;
}
.preview-box-total .preview-box-value { font-size: 1rem; }
.preview-footer {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.preview-footer i { color: var(--green); font-size: 0.75rem; }

/* ===== RESPONSIVE ===== */
@media(min-width:640px){
  .dash-user span { display:inline; }
  .config-form .form-row { grid-template-columns:1fr 1fr; }
}
@media(min-width:768px){
  .dash-header { height:68px; padding:0 5%; }
  .dash-section { padding:2rem 5%; }
}

/* ===== PHONE FRAME / WHATSAPP CHAT ===== */
.phone-frame {
  max-width: 340px;
  margin: 0 auto;
  border: 10px solid #1a1a1a;
  border-radius: 44px;
  overflow: hidden;
  background: #fff;
  position: relative;
  box-shadow: 0 25px 50px rgba(0,0,0,0.18), 0 10px 20px rgba(0,0,0,0.1);
}
.phone-notch {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 26px;
  background: #1a1a1a;
  border-radius: 0 0 18px 18px;
  z-index: 10;
}
.wa-chat-header {
  background: #008069;
  color: #fff;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .75rem;
  padding-top: 34px;
}
.wa-chat-back { font-size: .85rem; opacity: .9; }
.wa-chat-avatar {
  width: 34px; height: 34px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem;
}
.wa-chat-info { flex: 1; }
.wa-chat-name { font-size: .85rem; font-weight: 600; letter-spacing: .01em; }
.wa-chat-status { font-size: .65rem; opacity: .85; }
.wa-chat-actions { font-size: .85rem; opacity: .9; }
.wa-chat-body {
  background: #f0f2f5;
  padding: .55rem .7rem;
}
.wa-chat-date {
  text-align: center;
  font-size: .62rem; color: #54656f;
  background: #d1d7db;
  margin: 0 auto .5rem;
  padding: .2rem .55rem;
  border-radius: 6px;
  display: block;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: .03em;
  font-weight: 500;
}
.wa-chat-msg {
  max-width: 88%;
  margin-bottom: .3rem;
  padding: .35rem .5rem;
  border-radius: 10px;
  position: relative;
  font-size: .78rem; line-height: 1.4;
}
.wa-chat-msg.received {
  background: #fff; color: #111;
  border-top-left-radius: 2px;
  margin-right: auto;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.wa-chat-msg.sent {
  background: #d9fdd3; color: #111;
  border-top-right-radius: 2px;
  margin-left: auto;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.wa-chat-msg-name {
  font-size: .62rem; color: #008069;
  font-weight: 700; margin-bottom: .1rem;
  text-transform: uppercase;
  letter-spacing: .02em;
}
.wa-chat-msg-text { color: #111; }
.wa-chat-msg-text a { color: #039be5; text-decoration: none; font-weight: 500; }
.wa-chat-msg-time {
  font-size: .58rem; color: #667781;
  text-align: right; margin-top: .15rem;
  display: flex; align-items: center;
  justify-content: flex-end; gap: .2rem;
}
.wa-chat-footer {
  display: flex; align-items: center; gap: .4rem;
  padding: .4rem .6rem;
  background: #f0f2f5;
  border-top: 1px solid rgba(0,0,0,0.04);
}
.wa-chat-input {
  flex: 1; background: #fff;
  border-radius: 18px;
  padding: .4rem .7rem;
  font-size: .72rem; color: #667781;
  display: flex; align-items: center; gap: .4rem;
}
.wa-chat-input::before {
  content: "\f0c6";
  font-family: "Font Awesome 6 Free";
  font-weight: 400;
  font-size: .8rem;
  color: #667781;
}
.wa-chat-mic {
  width: 30px; height: 30px;
  background: #008069; color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem;
}