:root {
  --bg-body: #2c3239;
  --bg-nav: #1e2328;
  --bg-surface: #353c44;
  --bg-elevated: #3e464f;
  --bg-input: #313840;
  --text: #dce0e5;
  --text-secondary: #97a0ab;
  --text-muted: #6a7380;
  --accent: #4e8cc7;
  --accent-hover: #3d75aa;
  --border: rgba(255,255,255,.07);
  --border-active: rgba(255,255,255,.14);
  --shadow-sm: 0 1px 4px rgba(0,0,0,.2);
  --shadow: 0 2px 10px rgba(0,0,0,.28);
  --shadow-lg: 0 6px 20px rgba(0,0,0,.35);
  --radius: 6px;
  --radius-lg: 10px;
}

*,*::before,*::after { box-sizing: border-box; }

body {
  background-color: var(--bg-body);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); transition: color .15s; }
a:hover { color: var(--accent-hover); }

/* ---- Navbar ---- */
.navbar {
  background-color: var(--bg-nav) !important;
  border-bottom: 1px solid var(--border);
  padding: .5rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1030;
  backdrop-filter: blur(12px);
}
.navbar-brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .5px;
  color: var(--text) !important;
  transition: opacity .2s;
}
.navbar-brand:hover { opacity: .75; }

.navbar-toggler {
  border: 1px solid var(--border-active);
  padding: .35rem .6rem;
}
.navbar-toggler:focus { box-shadow: 0 0 0 .15rem rgba(78,140,199,.25); }
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23dce0e5' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-nav .nav-link {
  color: var(--text-secondary) !important;
  font-size: .875rem;
  font-weight: 500;
  padding: .45rem .75rem !important;
  border-radius: var(--radius);
  transition: color .15s, background-color .15s;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: #fff !important;
  background-color: rgba(255,255,255,.06);
}

.dark-dropdown {
  background-color: var(--bg-nav);
  border: 1px solid var(--border-active);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 150px;
  padding: .3rem 0;
  margin-top: 2px;
}
.dark-dropdown .dropdown-item {
  color: var(--text-secondary);
  font-size: .85rem;
  padding: .42rem 1rem;
  transition: background-color .12s, color .12s;
}
.dark-dropdown .dropdown-item:hover,
.dark-dropdown .dropdown-item.active {
  background-color: rgba(255,255,255,.07);
  color: #fff;
}

@media (min-width: 992px) {
  .navbar-nav .nav-item.dropdown:hover .dropdown-menu { display: block; }
  .navbar-nav .nav-item.dropdown .dropdown-toggle::after { display: none; }
}

@media (max-width: 991px) {
  .navbar-collapse {
    background-color: var(--bg-nav);
    border-top: 1px solid var(--border);
    margin: .5rem -1rem 0;
    padding: .5rem 1rem .75rem;
  }
  .navbar-nav .nav-link {
    padding: .6rem .75rem !important;
    border-bottom: 1px solid var(--border);
  }
  .navbar-nav .nav-item:last-child .nav-link { border-bottom: none; }
  .dark-dropdown {
    background-color: rgba(255,255,255,.03);
    border: none;
    box-shadow: none;
    padding-left: 1rem;
    margin-top: 0;
  }
}

/* ---- Cards ---- */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  color: var(--text);
}
.card-header {
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  padding: .7rem 1.1rem;
}
.card-header:first-child { border-radius: calc(var(--radius-lg) - 1px) calc(var(--radius-lg) - 1px) 0 0; }
.card-body { padding: 1.1rem; }
.card-footer {
  background-color: transparent;
  border-top: 1px solid var(--border);
  padding: .7rem 1.1rem;
}
.card-title { font-weight: 600; }
.card-text { color: var(--text-secondary); font-size: .92rem; line-height: 1.6; }

/* ---- Buttons ---- */
.btn { border-radius: var(--radius); font-weight: 500; font-size: .9rem; transition: all .15s; }
.btn-primary { background-color: var(--accent); border-color: var(--accent); }
.btn-primary:hover { background-color: var(--accent-hover); border-color: var(--accent-hover); }
.btn-dark { background-color: var(--bg-elevated); border-color: var(--border-active); color: var(--text); }
.btn-dark:hover { background-color: #4d555e; border-color: var(--border-active); color: #fff; }

/* ---- Forms ---- */
.form-control, .form-select {
  background-color: var(--bg-input);
  border: 1px solid var(--border-active);
  color: var(--text);
  border-radius: var(--radius);
  font-size: .9rem;
  padding: .5rem .75rem;
}
.form-control:focus, .form-select:focus {
  background-color: var(--bg-elevated);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 0 .2rem rgba(78,140,199,.18);
}
.form-control::placeholder { color: var(--text-muted); }
.form-label { font-weight: 500; font-size: .88rem; color: var(--text-secondary); margin-bottom: .3rem; }
.form-check-input { background-color: var(--bg-input); border-color: var(--border-active); }
.form-check-input:checked { background-color: var(--accent); border-color: var(--accent); }

/* ---- Tables ---- */
.table { color: var(--text); --bs-table-bg: transparent; }
.table > thead > tr > th {
  background-color: var(--bg-elevated);
  border-color: var(--border);
  font-weight: 600;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-secondary);
  padding: .65rem .8rem;
}
.table > tbody > tr > td {
  border-color: var(--border);
  padding: .6rem .8rem;
  vertical-align: middle;
}
.table-striped > tbody > tr:nth-of-type(odd) > * { background-color: rgba(255,255,255,.015); color: var(--text); }
.table-hover > tbody > tr:hover > * { background-color: rgba(255,255,255,.04); color: var(--text); }

/* ---- Alerts ---- */
.alert { border-radius: var(--radius); border: none; font-size: .9rem; }

/* ---- Modal ---- */
.modal-content {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-lg);
  color: var(--text);
}
.modal-header { border-bottom: 1px solid var(--border); }
.modal-header .modal-title { font-weight: 600; color: var(--text); }
.modal-header .btn-close-white { filter: invert(1) grayscale(100%) brightness(200%); }
.modal-body { color: var(--text); }

/* ---- Pagination ---- */
.page-link {
  background-color: var(--bg-surface);
  border-color: var(--border);
  color: var(--text-secondary);
  font-size: .88rem;
}
.page-link:hover { background-color: var(--bg-elevated); border-color: var(--border-active); color: var(--text); }
.page-item.active .page-link { background-color: var(--accent); border-color: var(--accent); color: #fff; }
.page-item.disabled .page-link { background-color: var(--bg-body); border-color: var(--border); color: var(--text-muted); }

/* ---- Sidebar ---- */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: .9rem 0;
  border-right: 1px solid var(--border);
  align-self: flex-start;
  position: sticky;
  top: 70px;
}
.sidebar-item {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .92rem;
  font-weight: 500;
  padding: .7rem 1.15rem .7rem 1.25rem;
  border-left: 3px solid transparent;
  transition: color .15s, background-color .15s, border-color .15s;
}
.sidebar-item:hover {
  color: var(--text);
  background-color: rgba(255,255,255,.04);
}
.sidebar-item.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background-color: rgba(78,140,199,.08);
  font-weight: 600;
}
@media (min-width: 992px) {
  .sidebar-nav {
    max-width: 320px;
  }
}
@media (max-width: 767px) {
  .sidebar-nav {
    border-right: none;
    border-bottom: none;
    flex-direction: column;
    gap: .35rem;
    position: static;
    padding: .25rem 0 .75rem;
    margin-bottom: 1rem;
  }
  .sidebar-item {
    display: none;
    border-left-width: 4px;
    border-bottom: none;
    padding: .8rem 1rem;
    font-size: .9rem;
    background-color: rgba(255,255,255,.03);
    border-radius: var(--radius);
  }
  .sidebar-item.active,
  .sidebar-nav.is-open .sidebar-item {
    display: block;
  }
  .sidebar-item.active {
    border-left-color: var(--accent);
    border-bottom-color: transparent;
    position: relative;
    padding-right: 2.8rem;
  }
  .sidebar-item.active::after {
    content: "";
    position: absolute;
    right: 1rem;
    top: 50%;
    width: .55rem;
    height: .55rem;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: translateY(-65%) rotate(45deg);
    transition: transform .15s ease;
  }
  .sidebar-nav.is-open .sidebar-item.active::after {
    transform: translateY(-35%) rotate(-135deg);
  }
}

/* ---- Form container (admin) ---- */
.form-container {
  max-width: 500px;
  margin: 0 auto;
  padding: 1.5rem;
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
}
.form-container h2 { margin-bottom: 1.2rem; font-size: 1.3rem; font-weight: 600; }

/* ---- Auth cards ---- */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.auth-card { max-width: 420px; width: 100%; }
.auth-card .card-header {
  background-color: var(--bg-nav);
  text-align: center;
  padding: 1.2rem;
}
.auth-card .card-header h4 { margin: 0; font-weight: 700; color: #fff; font-size: 1.2rem; }
.auth-card .card-footer { text-align: center; }
.auth-card .card-footer a { font-size: .88rem; }

/* ---- Dashboard welcome ---- */
.welcome-section { text-align: center; padding: 3rem 1rem; }
.welcome-section h1 { font-weight: 700; font-size: 1.75rem; margin-bottom: .5rem; }
.welcome-section p { color: var(--text-secondary); font-size: 1rem; }
.quick-links { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; margin-top: 1.5rem; }
.quick-link {
  display: flex; align-items: center; gap: .5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: .75rem 1.25rem;
  color: var(--text);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  transition: all .15s;
  box-shadow: var(--shadow-sm);
}
.quick-link:hover {
  background-color: var(--bg-elevated);
  border-color: var(--border-active);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

/* ---- Spinner ---- */
.spinner-border { color: var(--accent) !important; }