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

:root {
  /* Tron Legacy Dark Theme (Default) */
  --bg-color: #080A0F;
  --surface-color: #10141E;
  --surface-variant: #182030;
  --primary-color: #00F0FF; /* Tron Cyan Blue Glow */
  --primary-glow: rgba(0, 240, 255, 0.35);
  --primary-container: #00384D;
  --on-primary-container: #80F8FF;
  --text-color: #E2F1F8;
  --text-muted: #7A9AA8;
  --border-color: #004D66;
  --card-glow: 0 0 12px rgba(0, 240, 255, 0.2);
  --error-color: #FF5252;
  --success-color: #00E676;
  --info-color: #00E5FF;
  --font-family: 'Rajdhani', 'Roboto', -apple-system, sans-serif;
}

[data-theme="light"] {
  /* Tron Legacy Light Theme */
  --bg-color: #EBF4F8;
  --surface-color: #FFFFFF;
  --surface-variant: #D6ECF7;
  --primary-color: #0088FF;
  --primary-glow: rgba(0, 136, 255, 0.25);
  --primary-container: #CCE5FF;
  --on-primary-container: #003366;
  --text-color: #081B26;
  --text-muted: #486581;
  --border-color: #0088FF;
  --card-glow: 0 0 10px rgba(0, 136, 255, 0.15);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  color: var(--text-color);
  font-family: var(--font-family);
  height: 100vh;
  overflow: hidden;
  letter-spacing: 0.5px;
}

/* Auth View */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.auth-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 0 24px var(--primary-glow);
  text-align: center;
  position: relative;
}

.auth-card h1 {
  color: var(--primary-color);
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 10px var(--primary-glow);
  margin-bottom: 8px;
}

.auth-card p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--primary-color);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background-color: var(--surface-variant);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 15px;
  font-family: var(--font-family);
  outline: none;
  transition: all 0.2s;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 10px var(--primary-glow);
}

.btn {
  width: 100%;
  padding: 12px 20px;
  border: 1px solid var(--primary-color);
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  font-family: var(--font-family);
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #001A24;
  box-shadow: 0 0 12px var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 20px var(--primary-color);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--surface-variant);
  color: var(--text-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* App Layout */
.app-container {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 240px;
  background-color: var(--surface-color);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 24px 20px;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  text-shadow: 0 0 10px var(--primary-glow);
  border-bottom: 1px solid var(--border-color);
}

.nav-list {
  list-style: none;
  padding: 16px 8px;
  flex: 1;
}

.nav-item {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: all 0.2s;
}

.nav-item:hover {
  background-color: var(--surface-variant);
  color: var(--primary-color);
  border-color: var(--border-color);
}

.nav-item.active {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
  border-color: var(--primary-color);
  box-shadow: 0 0 10px var(--primary-glow);
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.top-bar {
  height: 64px;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
}

.top-bar-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: 1px;
}

.content-body {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* Cards & Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--card-glow);
  transform: translateY(-2px);
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-color);
}

.card-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-active { background-color: #004D25; color: #80FFB4; border: 1px solid #00E676; }
.badge-new { background-color: #263238; color: #B0BEC5; border: 1px solid #78909C; }
.badge-progress { background-color: #002B4D; color: #80C8FF; border: 1px solid #0088FF; }
.badge-completed { background-color: #004D25; color: #80FFB4; border: 1px solid #00E676; }

/* Filter Bar */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.chip {
  padding: 8px 16px;
  border-radius: 20px;
  background-color: var(--surface-variant);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  white-space: nowrap;
  transition: all 0.2s;
}

.chip:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.chip.active {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
  border-color: var(--primary-color);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* Gantt Chart */
.gantt-container {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow-x: auto;
  margin-top: 16px;
  box-shadow: var(--card-glow);
}

.gantt-header {
  display: flex;
  background-color: var(--surface-variant);
  border-bottom: 1px solid var(--border-color);
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-color);
}

.gantt-label-col {
  width: 260px;
  min-width: 260px;
  padding: 12px 16px;
  border-right: 1px solid var(--border-color);
}

.gantt-timeline-header {
  flex: 1;
  display: flex;
}

.gantt-day-col {
  flex: 1;
  min-width: 45px;
  padding: 12px 4px;
  text-align: center;
  border-right: 1px solid rgba(0, 240, 255, 0.1);
  font-size: 11px;
}

.gantt-row {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
}

.gantt-task-info {
  width: 260px;
  min-width: 260px;
  padding: 12px 16px;
  border-right: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 600;
}

.gantt-timeline-row {
  flex: 1;
  display: flex;
  position: relative;
  height: 48px;
  align-items: center;
}

.gantt-bar {
  position: absolute;
  height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: 11px;
  font-weight: 700;
  box-shadow: 0 0 10px var(--primary-glow);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gantt-bar-new { background-color: #37474F; color: #ECEFF1; border: 1px solid #78909C; }
.gantt-bar-progress { background-color: #0088FF; color: #FFFFFF; border: 1px solid #80C8FF; }
.gantt-bar-completed { background-color: #00E676; color: #003311; border: 1px solid #80FFB4; }

/* Calendar Grid */
.calendar-month-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  background-color: var(--surface-color);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-glow);
}

.calendar-day-header {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-color);
  padding: 8px 0;
  text-transform: uppercase;
}

.calendar-day-cell {
  background-color: var(--surface-variant);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-height: 85px;
  max-height: 130px;
  overflow: hidden;
  padding: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: all 0.2s;
}

.calendar-day-cell:hover {
  border-color: var(--primary-color);
  box-shadow: 0 0 8px var(--primary-glow);
}

.calendar-day-cell.selected {
  border-color: var(--primary-color);
  background-color: var(--primary-container);
  box-shadow: 0 0 10px var(--primary-glow);
}

.calendar-day-cell.other-month {
  opacity: 0.3;
}

.calendar-day-number {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 4px;
}

.calendar-event-dot {
  background-color: var(--primary-container);
  color: var(--on-primary-container);
  border: 1px solid var(--primary-color);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 4px;
  border-radius: 4px;
  margin-top: 2px;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Modal Backdrop & Dialog */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(8, 10, 15, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal {
  background-color: var(--surface-color);
  border: 1px solid var(--primary-color);
  border-radius: 16px;
  width: 90%;
  max-width: 520px;
  padding: 32px;
  box-shadow: 0 0 30px var(--primary-glow);
}

.modal-header {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

.gantt-section-header {
  display: flex;
  background-color: var(--surface-variant);
  border-bottom: 2px solid var(--primary-color);
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 700;
}

/* Responsive Mobile Adjustments */
@media (max-width: 768px) {
  .app-container {
    flex-direction: column-reverse;
  }

  .sidebar {
    width: 100%;
    height: 60px;
    flex-direction: row;
    border-right: none;
    border-top: 1px solid var(--border-color);
  }

  .sidebar-brand {
    display: none;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    padding: 4px;
    width: 100%;
  }

  .nav-item {
    padding: 8px;
    margin-bottom: 0;
    font-size: 12px;
    flex-direction: column;
    gap: 2px;
    text-align: center;
  }

  .main-content {
    height: calc(100vh - 60px);
  }

  .top-bar {
    padding: 0 12px;
    height: 56px;
  }

  .top-bar-title {
    font-size: 16px;
  }

  .content-body {
    padding: 12px;
  }

  .modal {
    width: 95%;
    padding: 20px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}