@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --primary: #12355b;
  --primary-dark: #0b2545;
  --accent: #00a6a6;
  --accent-dark: #007f7f;
  --background: #f4f7fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #657084;
  --border: #dce3ec;
  --danger: #c0392b;
  --warning: #d97706;
  --shadow: 0 10px 30px rgba(18, 53, 91, 0.1);
}

html {
  position: relative;
  min-height: 100%;
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  margin-bottom: 80px;
  background: var(--background);
  color: var(--text);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.6;
}

/* Navigation */

.navbar {
  background: linear-gradient(
    135deg,
    var(--primary-dark),
    var(--primary)
  ) !important;
  border: none !important;
  box-shadow: 0 4px 18px rgba(11, 37, 69, 0.2);
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.navbar-brand {
  color: #ffffff !important;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.navbar .nav-link {
  color: rgba(255, 255, 255, 0.82) !important;
  font-weight: 500;
  margin: 0 0.25rem;
  transition: 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus {
  color: #ffffff !important;
  transform: translateY(-1px);
}

.navbar-toggler {
  border-color: rgba(255, 255, 255, 0.4);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

/* Main layout */

main {
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

main > h1,
main > .text-center > h1,
h1 {
  color: var(--primary-dark);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

h2,
h3,
h4 {
  color: var(--primary);
  font-weight: 700;
}

p {
  color: var(--muted);
}

/* Homepage */

.text-center {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 3.5rem 2rem;
}

.display-4 {
  color: var(--primary-dark);
  font-weight: 800;
  letter-spacing: -0.05em;
}

.text-center p {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.05rem;
}

/* Buttons */

.btn {
  border-radius: 9px;
  padding: 0.6rem 1rem;
  font-weight: 600;
  border: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(18, 53, 91, 0.18);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  color: #ffffff;
}

.btn-success {
  background: var(--accent);
}

.btn-success:hover,
.btn-success:focus {
  background: var(--accent-dark);
}

.btn-warning {
  background: var(--warning);
  color: #ffffff;
}

.btn-danger {
  background: var(--danger);
}

.btn-secondary {
  background: #697386;
}

.btn-link {
  color: var(--primary);
  font-weight: 600;
}

/* Forms */

form {
  max-width: 850px;
}

.form-control,
.form-select {
  min-height: 45px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #ffffff;
}

textarea.form-control {
  min-height: 120px;
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.22rem rgba(0, 166, 166, 0.15);
}

.form-label,
label {
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-check-input:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}

.text-danger,
.field-validation-error {
  font-size: 0.9rem;
  font-weight: 500;
}

/* Tables */

.table {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  vertical-align: middle;
}

.table thead {
  background: var(--primary-dark);
  color: #ffffff;
}

.table thead th {
  color: #ffffff;
  padding: 1rem;
  border-bottom: none;
  font-weight: 700;
}

.table tbody td {
  padding: 1rem;
  border-color: var(--border);
  color: var(--text);
}

.table tbody tr {
  transition: background-color 0.18s ease;
}

.table tbody tr:hover {
  background: #f0f7fa;
}

.table a {
  text-decoration: none;
}

/* Authentication pages */

.row form,
section form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 2rem;
}

#external-account button,
button[name="provider"] {
  width: 100%;
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

#external-account button:hover,
button[name="provider"]:hover {
  background: #f4f7fb;
}

/* Links */

a {
  color: var(--primary);
}

a:hover {
  color: var(--accent-dark);
}

/* Footer */

.footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8) !important;
  border-top: none !important;
  min-height: 70px;
  display: flex;
  align-items: center;
}

.footer .container {
  color: rgba(255, 255, 255, 0.8);
}

.footer a {
  color: #ffffff;
}

/* Responsive improvements */

@media (max-width: 767px) {
  main {
    padding-top: 1.5rem;
  }

  .text-center {
    padding: 2rem 1.1rem;
  }

  .display-4 {
    font-size: 2.25rem;
  }

  .table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .btn {
    margin-bottom: 0.3rem;
  }
}