:root {
  --orange:    #ee7900;
  --orange-dk: #c96300;
  --orange-lt: #fff4ea;
  --dark:      #1c1c1c;
  --gray:      #6c757d;
  --light:     #f4f5f7;
  --white:     #ffffff;
  --radius:    14px;
  --shadow:    0 4px 24px rgba(0,0,0,.10);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.15);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background: var(--light); color: var(--dark); }

/* ────── SHARED HEADER ────── */
.site-header {
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  padding: 0 2rem;
  position: sticky; top: 0; z-index: 100;
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: auto; height: 68px;
}
.site-header img.logo { height: 46px; }
.header-brand {
  display: flex; align-items: center; gap: 1rem;
}
.header-brand .app-name {
  font-size: .82rem; font-weight: 800; color: var(--orange);
  letter-spacing: .06em; text-transform: uppercase;
  border-left: 2px solid #e0e0e0; padding-left: 1rem;
}
.user-pill {
  display: flex; align-items: center; gap: .6rem;
  background: var(--orange-lt); border-radius: 50px;
  padding: .35rem .9rem .35rem .5rem; font-size: .85rem; font-weight: 500;
}
.user-pill .avatar {
  background: var(--orange); color: #fff;
  border-radius: 50%; width: 32px; height: 32px;
  display: grid; place-items: center; font-size: .8rem;
}
.btn-logout {
  margin-left: .5rem; background: none; border: none;
  color: var(--gray); cursor: pointer; font-size: .85rem;
  transition: color var(--transition);
}
.btn-logout:hover { color: var(--orange); }

/* ────── PAGE TRANSITIONS ────── */
.page { display: none; animation: fadeSlideIn .45s ease forwards; }
.page.active { display: block; }
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(15px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ────── LOGIN PAGE ────── */
#login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #1c1c1c 0%, #3a1a00 50%, #ee7900 100%);
  display: flex; align-items: center; justify-content: center; padding: 2rem;
}
#login-page.active { display: flex; }
.login-card {
  background: var(--white); border-radius: 22px;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  padding: 3rem 2.5rem; width: 100%; max-width: 420px; text-align: center;
  position: relative; overflow: hidden;
}
.login-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--orange), #ffb74d, var(--orange));
}
.login-card img.logo { height: 58px; margin-bottom: 1.4rem; }
.login-card h1 { font-size: 1.4rem; font-weight: 800; margin-bottom: .3rem; }
.login-card .app-badge {
  display: inline-block; background: var(--orange-lt); color: var(--orange);
  border-radius: 50px; padding: .2rem .8rem; font-size: .72rem;
  font-weight: 700; letter-spacing: .08em; margin-bottom: .4rem;
  text-transform: uppercase;
}
.login-card p.sub { font-size: .88rem; color: var(--gray); margin-bottom: 2rem; }
.login-card .form-label { text-align: left; display: block; font-size: .83rem; font-weight: 500; margin-bottom: .3rem; }
.login-card .form-control {
  border-radius: 10px; border: 1.5px solid #ddd; padding: .7rem 1rem;
  font-size: .95rem; transition: border-color .2s;
}
.login-card .form-control:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(238,121,0,.15); outline: none; }
.login-card .input-group { position: relative; }
.login-card .input-icon {
  position: absolute; left: .9rem; top: 50%; transform: translateY(-50%);
  color: var(--gray); font-size: .9rem; z-index: 1;
}
.login-card .form-control.with-icon { padding-left: 2.4rem; }
.btn-login {
  width: 100%; background: linear-gradient(135deg, var(--orange), #f09030);
  color: #fff; border: none; border-radius: 10px; padding: .85rem;
  font-size: 1rem; font-weight: 600; cursor: pointer;
  transition: transform .15s, box-shadow .2s; margin-top: .5rem;
  box-shadow: 0 4px 15px rgba(238,121,0,.35);
}
.btn-login:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(238,121,0,.45); }
.btn-login:active { transform: translateY(0); }
.login-notice { font-size: .78rem; color: var(--gray); margin-top: 1.4rem; }

/* ────── COMPANIES PAGE ────── */
.dash-hero {
  background: linear-gradient(120deg, #1c1c1c, #3a1700);
  color: #fff; padding: 2.5rem 2rem;
}
.dash-hero .inner { max-width: 1200px; margin: auto; }
.dash-hero h2 { font-size: 1.5rem; font-weight: 700; margin: 0 0 .3rem; }
.dash-hero p { font-size: .9rem; opacity: .75; margin: 0; }
.dash-hero .id-badge {
  display: inline-block; background: var(--orange); border-radius: 50px;
  padding: .25rem .9rem; font-size: .82rem; font-weight: 600; margin-top: .7rem;
}

.companies-body { max-width: 1200px; margin: 2rem auto; padding: 0 1.5rem 4rem; }

/* Stats row */
.stats-row { display: flex; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.stat-card {
  background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.1rem 1.5rem; flex: 1; min-width: 160px;
  border-left: 4px solid var(--orange); display: flex; align-items: center; gap: 1rem;
  transition: transform var(--transition);
}
.stat-card:hover { transform: translateY(-2px); }
.stat-card .icon { font-size: 1.6rem; color: var(--orange); }
.stat-card .val { font-size: 1.6rem; font-weight: 700; line-height: 1; }
.stat-card .lbl { font-size: .78rem; color: var(--gray); }

/* Company cards grid */
.company-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem; margin-top: .5rem;
}
.company-card {
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.company-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: linear-gradient(90deg, var(--orange), #ffb74d);
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s ease;
}
.company-card:hover::before { transform: scaleX(1); }
.company-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.company-card-body { padding: 1.8rem; }
.company-card .company-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, var(--orange-lt), #ffe0b2);
  display: grid; place-items: center; font-size: 1.5rem; color: var(--orange);
  margin-bottom: 1rem;
}
.company-card .company-name {
  font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; line-height: 1.3;
}
.company-card .company-meta {
  display: flex; gap: 1rem; flex-wrap: wrap;
}
.company-card .meta-item {
  display: flex; align-items: center; gap: .35rem;
  font-size: .8rem; color: var(--gray);
}
.company-card .meta-item i { color: var(--orange); font-size: .75rem; }
.company-card-footer {
  background: #fafafa; border-top: 1px solid #f0f0f0;
  padding: .8rem 1.8rem; display: flex; justify-content: space-between;
  align-items: center; font-size: .82rem;
}
.company-card-footer .enter-link {
  color: var(--orange); font-weight: 600; text-decoration: none;
  display: flex; align-items: center; gap: .3rem;
  transition: gap var(--transition);
}
.company-card:hover .enter-link { gap: .6rem; }
.company-card .cert-badges { display: flex; gap: .4rem; }
.company-card .cert-badge {
  background: var(--orange-lt); color: var(--orange);
  border-radius: 50px; padding: .15rem .6rem; font-size: .7rem; font-weight: 600;
}
.company-card .cert-badge.prop-badge {
  background: #e8f5e9; color: #2e7d32;
}

/* ────── CERTIFICATES PAGE ────── */
.cert-page-body { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem 4rem; }
.btn-back {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--white); border: 1.5px solid #e0e0e0; border-radius: 10px;
  padding: .55rem 1.2rem; font-size: .85rem; font-weight: 500; color: var(--dark);
  cursor: pointer; transition: all var(--transition); margin: 1.5rem 0;
}
.btn-back:hover {
  border-color: var(--orange); color: var(--orange);
  box-shadow: 0 2px 8px rgba(238,121,0,.12);
}

/* Cert type tabs */
.cert-type-tabs {
  background: var(--white); border-radius: var(--radius) var(--radius) 0 0;
  box-shadow: 0 -2px 10px rgba(0,0,0,.04);
  display: flex; border-bottom: 2px solid #f0f0f0; overflow-x: auto;
}
.cert-type-tab {
  border: none; background: none; padding: 1rem 1.5rem;
  font-size: .9rem; font-weight: 600; color: var(--gray); cursor: pointer;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
  display: flex; align-items: center; gap: .5rem;
  transition: color var(--transition); white-space: nowrap;
}
.cert-type-tab .tab-icon {
  width: 30px; height: 30px; border-radius: 8px;
  display: grid; place-items: center; font-size: .8rem;
  transition: background var(--transition), color var(--transition);
}
.cert-type-tab .tab-icon.ret-icon { background: #fff3e0; color: #e65100; }
.cert-type-tab .tab-icon.prop-icon { background: #e8f5e9; color: #2e7d32; }
.cert-type-tab .tab-count {
  background: #f0f0f0; border-radius: 50px; padding: .1rem .55rem;
  font-size: .72rem; font-weight: 700;
}
.cert-type-tab.active { color: var(--orange); border-bottom-color: var(--orange); }
.cert-type-tab.active .tab-count { background: var(--orange-lt); color: var(--orange); }
.cert-type-tab:hover:not(.active) { color: var(--dark); }

.cert-panel {
  background: var(--white); border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.cert-tab-pane { padding: 1.5rem; display: none; }
.cert-tab-pane.active { display: block; }

/* Table */
.table-wrapper { overflow-x: auto; }
table.cert-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.cert-table thead th {
  background: #fafafa; font-size: .78rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; color: var(--gray); padding: .85rem 1rem;
  border-bottom: 2px solid #f0f0f0;
}
.cert-table tbody tr { transition: background .15s; }
.cert-table tbody tr:hover { background: var(--orange-lt); }
.cert-table tbody td { padding: .8rem 1rem; font-size: .9rem; border-bottom: 1px solid #f4f4f4; vertical-align: middle; }

/* Type pills */
.type-pill {
  display: inline-flex; align-items: center; gap: .4rem;
  border-radius: 50px; padding: .25rem .75rem; font-size: .78rem; font-weight: 600;
}
.type-fuente  { background: #fff3e0; color: #e65100; }
.type-iva     { background: #e8f5e9; color: #2e7d32; }
.type-ica     { background: #e3f2fd; color: #1565c0; }
.type-prop    { background: #f3e5f5; color: #7b1fa2; }

/* PDF download button */
.btn-pdf {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--orange), #f09030);
  color: #fff; text-decoration: none;
  font-size: .9rem; transition: transform .15s, box-shadow .2s; border: none; cursor: pointer;
  box-shadow: 0 2px 8px rgba(238,121,0,.25);
}
.btn-pdf:hover { transform: scale(1.1); box-shadow: 0 4px 12px rgba(238,121,0,.35); color: #fff; }

/* DataTables overrides */
.dataTables_wrapper .dataTables_filter input {
  border-radius: 8px; border: 1.5px solid #ddd; padding: .4rem .8rem; font-size: .88rem;
}
.dataTables_wrapper .dataTables_filter input:focus { border-color: var(--orange); outline: none; }
.dataTables_wrapper .dataTables_length select { border-radius: 8px; border: 1.5px solid #ddd; padding: .3rem .5rem; }
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  background: var(--orange) !important; border-color: var(--orange) !important;
  color: #fff !important; border-radius: 6px;
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  background: var(--orange-lt) !important; border-color: var(--orange) !important;
  color: var(--orange) !important; border-radius: 6px;
}

/* Empty state */
.empty-state {
  text-align: center; padding: 3rem 1rem; color: var(--gray);
}
.empty-state i { font-size: 3rem; color: #ddd; margin-bottom: 1rem; }
.empty-state h4 { font-size: 1.1rem; font-weight: 600; color: var(--dark); margin-bottom: .3rem; }
.empty-state p { font-size: .88rem; }

/* Responsive */
@media (max-width: 600px) {
  .login-card { padding: 2rem 1.2rem; }
  .dash-hero h2 { font-size: 1.2rem; }
  .stats-row .stat-card { min-width: 130px; }
  .company-grid { grid-template-columns: 1fr; }
  .header-brand .app-name { display: none; }
}