* { box-sizing: border-box; }

:root {
 --color-sidebar: #1f2937;
 --color-sidebar-item: #374151;
 --color-primary: #28a745;
 --color-primary-hover: #218838;
 --color-danger: #e74c3c;
 --color-danger-hover: #c0392b;
 --color-info: #3498db;
 --color-info-hover: #2980b9;
 --color-availability: #9b59b6;
 --color-availability-hover: #8e44ad;
  
 --color-focus: #111111;
 --color-overlay: rgba(17, 24, 39, 0.55);
  
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-text: #222222;
  --color-muted: #4b5563;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;

  --space-xs: 0.25em; /*  4px; */
  --space-sm: 0.5em;  /*  8px; */
  --space-md: 0.75em; /*  12px; */
  --space-lg: 1em;    /*  16px; */
  --space-xl: 1.5em;  /*  24px; */

  --shadow-panel: -8px 0 24px rgba(0, 0, 0, 0.16);
  --shadow-modal: 0 20px 40px rgba(0, 0, 0, 0.25);

  --font-family-main: Arial, sans-serif;

  --font-size-xs: 0.75em; /*  12px; */
  --font-size-sm: 0.81em; /*  13px; */
  --font-size-md: 0.875em;  /*  14px; */
  --font-size-base: 1em;    /*  16px; */
  --font-size-lg: 1.125em;  /*  18px; */
  --font-size-xl: 1.5em;    /*  24px; */
  --font-size-2xl: 1.75em;  /*  28px; */

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  --line-height-sm: 1.2;
  --line-height-base: 1.4;
  --line-height-heading: 1.1;
}

body {
  margin: 0;
  font-family: var(--font-family-main);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

button,
select,
input {
  font: inherit;
}

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  padding: 28px var(--space-xl);
  background-color: var(--color-sidebar);
  color: var(--color-surface);
}

.sidebar h1 {
  margin: 0 0 32px;
  font-size: var(--font-size-xl);
}

.sidebar-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--space-xl);
}

.sidebar-controls select {
  width: 100%;
  padding: 10px var(--space-md);
  border: none;
  border-radius: 6px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--space-xl);
}

.nav-button,
.seed-button {
  width: 100%;
  padding: 11px 14px;
  border: none;
  cursor: pointer;
  border-radius: 6px;
}

.nav-button {
  background-color: var(--color-sidebar-item);
  color: var(--color-surface);
}

.nav-button.active {
  background-color: var(--color-info);
}

.seed-button {
  margin-top: var(--space-sm);
  background-color: var(--color-primary);
  color: var(--color-surface);
}

.main {
  flex: 1;
  padding: 32px;
  background-color: var(--color-bg);
}

#content {
  width: 100%;
  min-height: 400px;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  overflow-x: auto;
}

.content-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.content-header h2 {
  margin: 0 0 6px;
  font-size: var(--font-size-2xl);
}

.content-header p {
  margin: 0;
  color: var(--color-muted);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
}

.table th,
.table td {
  padding: 14px var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: middle;
  font-size: var(--font-size-md);
}

.table th {
  background-color: var(--color-bg);
  font-weight: var(--font-weight-bold);
}

.table-button {
  padding: 7px 10px;
  border: none;
  border-radius: 6px;
  background-color: var(--color-border);
  cursor: pointer;
}

.table-button:hover {
  background-color: var(--color-bg);
}

.table-button:disabled,
.table-button:disabled:hover {
  background-color: var(--color-muted);
  color: var(--color-surface);
  cursor: not-allowed;
  opacity: 0.75;
}

.info-button,
.assign-button {
   background-color: var(--color-info);
   color: var(--color-surface); 
}

.info-button:hover,
.assign-button:hover {
    background-color: var(--color-info-hover);
}

.availability-button {
  background-color: var(--color-availability);
  color: var(--color-surface);
}

.availability-button:hover {
  background-color: var(--color-availability-hover);
}


.table-button.danger {
  background-color: var(--color-danger);
  color: var(--color-surface);
}

.table-button.danger:hover {
    color: var(--color-surface);
  background-color: var(--color-danger-hover);
}

@media (max-width: 900px) {
  .app {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .main {
    padding: 20px;
  }

  #content {
    overflow-x: auto;
  }
}

.primary-button {
  padding: 10px var(--space-lg);
  border: none;
  border-radius: 6px;
  background-color: var(--color-primary);
  color: var(--color-surface);
  cursor: pointer;
}

.primary-button:hover {
  background-color: var(--color-primary-hover);
}

/*   MODAL   */
.hidden,
.modal.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  justify-content: flex-end;
  background-color: var(--color-overlay);
}

.modal-content {
  width: 23em;   /*  368px */
  height: 100vh;
  padding: var(--space-xl);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-panel);
  animation: slideIn 0.25s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
  }

  to {
    transform: translateX(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: var(--space-md);
  border-bottom: 2px solid #b8c0c8;
}

.modal-header h2 {
  margin: 0;
  font-size: var(--font-size-xl);
}

.modal-close {
  border: none;
  background: transparent;
  font-size: var(--font-size-2xl);
  line-height: 1;
  cursor: pointer;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 400;
}

.form input,
.form select {
  padding: var(--space-sm) 10px;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-sm);
}

.form input:focus,
.form input:focus-visible,
.form select:focus,
.form select:focus-visible {
  outline: none;
  border: 2px solid var(--color-focus);
  box-shadow: none;
}

.error-message {
  min-height: 0;
  margin-top: 0;
  font-size: var(--font-size-sm);
  line-height: 1.2;
  color: var(--color-danger);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: var(--space-sm);
}

.secondary-button {
  padding: 10px var(--space-lg);
  border: none;
  border-radius: 6px;
  background-color: var(--color-border);
  cursor: pointer;
}

.secondary-button:hover {
  background-color: var(--color-bg);
}

.primary-button:disabled,
.primary-button:disabled:hover {
  background-color: var(--color-muted);
  color: var(--color-surface);
  cursor: not-allowed;
  opacity: 1;
}

/*   EMPLOYEES MODAL   */
.center-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background-color: rgba(17, 24, 39, 0.55);
}

.center-modal.hidden {
  display: none;
}

.center-modal-content {
  width: min(1100px, 100%);
  max-height: 80vh;
  overflow: auto;
  border-radius: 8px;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-modal);
}

.center-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background-color: var(--color-sidebar-item);
  color: var(--color-surface);
}

.center-modal-header h2 {
  margin: 0;
  font-size: var(--font-size-lg);
}

#project-employees-body {
  padding: var(--space-xl) 20px;
}

/*   ASSIGN   */
.assign-popup {
  position: absolute;
  z-index: 200;
  width: 420px;
  padding: 20px;
  border-radius: 8px;
  background-color: var(--color-surface);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.assign-popup.hidden {
  display: none;
}

.assign-popup-header h2 {
  margin: 0 0 var(--space-md);
  font-size: 22px;
  color: var(--color-sidebar);
}

.assign-popup-info {
  margin-bottom: var(--space-lg);
  padding: var(--space-md);
  border-left: var(--space-xs) solid var(--color-info);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
}

.assign-popup-info p {
  margin: 0 0 var(--space-xs);
}

.assign-popup-info p:last-child {
  margin-bottom: 0;
}


.table th:nth-child(7),
.table td:nth-child(7) {
  min-width: 190px;
}

.table th:nth-child(9),
.table td:nth-child(9) {
  min-width: 160px;
}

.table td:nth-child(7) .table-button,
.table td:nth-child(9) .table-button {
  white-space: nowrap;
}

/* AVAILABILITY MODAL */
#employee-availability-modal .center-modal-content {
  width: min(440px, 100%);
  border-radius: 18px;
  overflow: hidden;
}

#employee-availability-modal .center-modal-header {
  position: relative;
  justify-content: center;
  padding: 20px 24px 8px;
  background-color: var(--color-surface);
  color: #2f4154;
}

#employee-availability-modal .center-modal-header h2 {
  margin: 0;
  font-size: 2em;
  font-weight: 700;
  text-align: center;
}

#employee-availability-modal .modal-close {
  position: absolute;
  top: 18px;
  right: 20px;
  color: #95a5a6;
  font-size: 2em;
}

#employee-availability-body {
  padding: 0 20px 20px;
}

.availability-layout {
  display: flex;
  flex-direction: column;
}

.availability-month {
  margin-top: 4px;
  text-align: center;
  font-size: 1.5em;
  color: #7f8c8d;
}

.availability-divider {
  margin: 16px 0 18px;
  border-top: 2px solid #ecf0f1;
}

.availability-weekdays,
.availability-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.availability-weekday {
  padding: 10px 0;
  border-radius: 6px;
  background-color: #eef2f5;
  text-align: center;
  font-weight: 700;
  color: #34495e;
}

.availability-empty-cell {
  min-height: 40px;
}

.availability-day {
  min-height: 42px;
  border: 1px solid #dce3e8;
  border-radius: 6px;
  background-color: #ffffff;
  color: #2f4154;
  cursor: pointer;
  font-weight: 500;
}

.availability-day:hover {
  border-color: #f39c12;
}

.availability-day.weekend {
  color: #c7ced4;
}

.availability-day.active {
  background-color: #f08a24;
  border: 2px solid #ef5b3f;
  color: #ffffff;
  font-weight: 700;
}

.availability-summary-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.availability-working-box {
  padding: 14px 16px;
  border-radius: 8px;
  background-color: #e3f1e7;
  text-align: center;
  color: #27ae60;
  font-size: 1.1em;
}

.availability-working-box strong {
  font-weight: 700;
}

.availability-vacation-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 10px;
  border-radius: 8px;
  background-color: #f8ecd8;
}

.availability-vacation-info {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  color: #2f4154;
}

.availability-vacation-info strong {
  color: #e67e22;
}

.availability-save-button {
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background-color: #e67e22;
  color: #ffffff;
  cursor: pointer;
  white-space: nowrap;
}

.availability-save-button:hover {
  background-color: #d35400;
}