/* ================= RESET ================= */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Roboto, system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #e0ebf9;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ================= NAVBAR ================= */

.navbar {
  background: #0b1a2e;
  padding: 0.8rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.navbar-brand {
  color: white;
  font-size: 1.6rem;
  font-weight: 600;
  white-space: nowrap;
}

.navbar-brand i {
  color: #f0c27f;
  margin-right: 10px;
}

.serach-form {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #1e3347;
  border: 1px solid #3a5068;
  border-radius: 20px;
  padding: 5px 10px 5px 5px;
  flex: 1;
  max-width: 420px;
}

.serach-form input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  color: white;
  font-size: 0.95rem;
  padding: 8px;
}

.serach-form input::placeholder {
  color: #b5c4d4;
}

.serach-form button {
  border: none;
  background: #f0c27f;
  color: #0b1a2e;
  border-radius: 30px;
  padding: 8px 16px;
  cursor: pointer;
  font-weight: 600;
  transition: 0.3s;
  white-space: nowrap;
}

.serach-form button:hover {
  background: #e6b067;
  transform: scale(1.05);
}
/* ================= NAVBAR SMALL DEVICES ================= */

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;

    align-items: stretch;

    gap: 15px;

    padding: 16px;
  }

  .navbar-brand {
    text-align: center;

    font-size: 1.4rem;
  }

  .search-form {
    width: 100%;

    max-width: 100%;
  }

  .search-form input {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 14px;
  }

  .navbar-brand {
    font-size: 1.25rem;
  }

  .search-form {
    flex-direction: column;

    border-radius: 18px;

    padding: 12px;
  }

  .search-form button {
    width: 100%;

    padding: 12px;
  }
}

/* ================= ALERT ================= */

#alertuser {
  width: min(1200px, 92%);

  margin: 18px auto 0;
}

.alert-custom {
  padding: 14px 20px;

  border-radius: 40px;

  background: #d4edda;

  color: #0e4b2b;

  border-left: 6px solid #28a745;

  display: flex;

  align-items: center;

  gap: 12px;

  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.alert-danger-custom {
  background: #f8d7da;

  color: #842029;

  border-left-color: #dc3545;
}

.alert-custom i {
  font-size: 1.2rem;
}

/* ================= CONTAINER ================= */

.container {
  width: 100%;

  max-width: 1200px;

  margin: 2rem auto;

  padding: 0 20px;

  flex: 1;
}

/* ================= WELCOME CARD ================= */

.welcome-card {
  background: white;

  border-radius: 20px;

  padding: 1.8rem 2rem;

  display: flex;

  justify-content: space-between;

  align-items: center;

  gap: 18px;

  flex-wrap: wrap;

  box-shadow: 0 8px 24px rgba(0, 20, 40, 0.08);

  margin-bottom: 25px;
}

.welcome-card h1 {
  color: #0b1a2e;

  font-size: 2rem;

  font-weight: 600;
}

.welcome-card h1 i {
  color: #f0c27f;

  margin-right: 12px;
}

.badge-count {
  background: #eef3f9;

  padding: 10px 20px;

  border-radius: 40px;

  font-size: 0.95rem;

  white-space: nowrap;
}

.badge-count i {
  margin-right: 8px;

  color: #e6b067;
}

/* ================= FORM CARD ================= */

.form-card {
  background: white;

  border-radius: 25px;

  padding: 2rem;

  margin-bottom: 2rem;

  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}

/* Form Layout */

.form-grid {
  display: flex;

  flex-wrap: wrap;

  gap: 25px;

  align-items: flex-end;
}

.form-group {
  flex: 1 1 220px;

  min-width: 220px;
}

.form-group label {
  display: block;

  margin-bottom: 8px;

  color: #1e3347;

  font-weight: 600;
}

/* Inputs */

.form-group input,
.radio-group {
  width: 100%;

  border: 1px solid #dde4ed;

  border-radius: 50px;

  background: #fafcff;

  padding: 12px 15px;

  font-size: 0.95rem;
}

.form-group input:focus {
  outline: none;

  border-color: #b68b5c;

  box-shadow: 0 0 0 3px rgba(182, 139, 92, 0.2);
}

/* Radio */

.radio-group {
  display: flex;

  flex-wrap: wrap;

  gap: 15px;
}

.radio-group label {
  display: flex;

  align-items: center;

  gap: 6px;

  font-weight: 500;

  cursor: pointer;

  margin: 0;
}

.radio-group input[type="radio"] {
  width: 16px;

  height: 16px;

  accent-color: #b68b5c;
}

/* Add Button */

.btn-add {
  width: 100%;

  border: none;

  background: #1f3a57;

  color: white;

  border-radius: 50px;

  padding: 13px;

  font-size: 1rem;

  font-weight: 600;

  cursor: pointer;

  transition: 0.3s;

  display: flex;

  justify-content: center;

  align-items: center;

  gap: 10px;
}

.btn-add:hover {
  transform: translateY(-2px);

  background: #16314d;
}

/* ================= TABLET FORM ================= */

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .welcome-card {
    flex-direction: column;

    align-items: flex-start;
  }

  .welcome-card h1 {
    font-size: 1.6rem;
  }

  .form-card {
    padding: 20px 16px;
  }

  /* Reader - Book gap fix */

  .form-grid {
    flex-direction: column;

    gap: 10px;
  }

  .form-group {
    flex: 1 1 100%;

    min-width: 100%;
  }

  .form-group label {
    margin-bottom: 5px;
  }

  .radio-group {
    border-radius: 20px;

    padding: 12px;

    gap: 12px;
  }
}

/* ================= MOBILE ================= */

@media (max-width: 480px) {
  .container {
    padding: 0 12px;

    margin: 20px auto;
  }

  .welcome-card {
    padding: 20px;
  }

  .welcome-card h1 {
    font-size: 1.35rem;
  }

  .badge-count {
    width: 100%;

    text-align: center;
  }

  .form-card {
    padding: 16px;
  }

  .form-grid {
    gap: 8px;
  }

  .form-group label {
    margin-bottom: 4px;
  }

  .form-group input,
  .radio-group {
    padding: 10px 14px;
  }

  .radio-group {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ================= TABLE ================= */

.table-wrapper {
  background: white;

  border-radius: 25px;

  overflow-x: auto;

  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);

  -webkit-overflow-scrolling: touch;
}

/* Table */

.table {
  width: 100%;

  min-width: 760px;

  border-collapse: collapse;

  font-size: 0.95rem;
}

/* Table Header */

.table thead {
  background: #0b1a2e;

  color: white;
}

.table th {
  padding: 16px 18px;

  text-align: left;

  white-space: nowrap;

  font-weight: 600;
}

/* Table Data */

.table td {
  padding: 15px 18px;

  border-bottom: 1px solid #eef2f7;

  color: #1e2f41;

  vertical-align: middle;
}

.table tbody tr:hover {
  background: #f8faff;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ================= BOOK GENRE BADGE ================= */

.book-genre {
  display: inline-block;

  padding: 5px 14px;

  border-radius: 30px;

  background: #e8edf5;

  color: #1f3a57;

  font-size: 0.85rem;

  font-weight: 600;
}

/* ================= ACTION BUTTONS ================= */

.action-btns {
  display: flex;

  justify-content: flex-end;

  flex-wrap: wrap;

  gap: 8px;
}

.btn-icon {
  border: none;

  background: transparent;

  color: #3a5068;

  cursor: pointer;

  border-radius: 30px;

  padding: 8px 12px;

  display: inline-flex;

  align-items: center;

  gap: 5px;

  transition: 0.25s;
}

.btn-icon i {
  font-size: 1rem;
}

.btn-icon:hover {
  background: #eef4fb;
}

/* Delete Button */

.btn-icon.delete:hover {
  background: #fee9ec;

  color: #dc3545;
}

/* Issue Button */

.btn-icon.issue:hover {
  background: #e7f7ed;

  color: #198754;
}

/* Issued Button */

.btn-icon.issued {
  background: #e7f7ed;

  color: #198754;

  pointer-events: none;

  opacity: 0.85;
}

/* ================= EMPTY TABLE ROW ================= */

.empty-row td {
  text-align: center;

  padding: 45px 20px;

  color: #7a8b9f;

  font-style: italic;
}

.empty-row i {
  display: block;

  font-size: 2rem;

  color: #cbd8e6;

  margin-bottom: 12px;
}

/* ================= TABLE RESPONSIVE ================= */

@media (max-width: 768px) {
  .table-wrapper {
    border-radius: 18px;
  }

  .table {
    min-width: 700px;

    font-size: 0.9rem;
  }

  .table th,
  .table td {
    padding: 12px;
  }

  .action-btns {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .table {
    min-width: 650px;

    font-size: 0.85rem;
  }

  .table th,
  .table td {
    padding: 10px;
  }

  .btn-icon {
    padding: 7px 10px;
  }
}

/* ================= GLOBAL RESPONSIVE CONTROL ================= */

/* Laptop / Small Desktop */

@media (max-width: 992px) {
  .navbar {
    padding: 16px;
  }

  .container {
    padding: 0 16px;
  }

  .welcome-card h1 {
    font-size: 1.8rem;
  }

  .form-grid {
    gap: 18px;
  }
}

/* ================= TABLET ================= */

@media (max-width: 768px) {
  body {
    overflow-x: hidden;
  }

  .container {
    width: 100%;

    margin: 1.5rem auto;
  }

  /* Welcome Card */

  .welcome-card {
    gap: 12px;

    margin-bottom: 18px;
  }

  /* Form */

  .form-card {
    border-radius: 20px;
  }

  .form-grid {
    display: flex;

    flex-direction: column;

    gap: 10px;
  }

  .form-group {
    width: 100%;

    min-width: 100%;
  }

  .form-group input {
    height: auto;
  }

  /* Radio */

  .radio-group {
    width: 100%;
  }

  /* Button */

  .btn-add {
    padding: 12px;
  }
}

/* ================= SMALL MOBILE ================= */

@media (max-width: 480px) {
  .container {
    padding: 0 10px;
  }

  .alert-custom {
    border-radius: 18px;

    padding: 12px 15px;

    font-size: 0.9rem;
  }

  .welcome-card {
    border-radius: 18px;

    padding: 16px;
  }

  .welcome-card h1 {
    font-size: 1.25rem;
  }

  .badge-count {
    font-size: 0.85rem;

    padding: 8px 14px;
  }

  .form-card {
    padding: 14px;

    border-radius: 18px;
  }

  .form-group label {
    font-size: 0.9rem;
  }

  .form-group input {
    font-size: 0.9rem;
  }

  .btn-add {
    font-size: 0.9rem;
  }
}

/* ================= LARGE DESKTOP ================= */

@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }

  .welcome-card h1 {
    font-size: 2.2rem;
  }
}