/* ============================================================
   COLOR TOKENS — edit only this block to re-theme the whole app
   ============================================================ */
:root {
  /* Brand */
  --primary:        #2b6cb0;
  --primary-hover:  #1f5a96;
  --primary-soft:   #e6f0fb;
  --primary-on:     #ffffff;

  --success:        #2f855a;
  --success-soft:   #e6f6ee;
  --success-on:     #ffffff;

  --warning:        #b7791f;
  --warning-soft:   #fff7e6;
  --warning-border: #f2d39b;
  --warning-text:   #8a5a12;

  /* Neutrals */
  --bg:             #f6f8fb;
  --surface:        #ffffff;
  --surface-alt:    #e5e9ee;
  --border:         #d8e0ea;
  --text:           #1f2937;
  --text-muted:     #6b7280;
  --text-light:     #94a3b8;
  --text-disabled:  #64748b;

  /* Shadows */
  --shadow:         0 6px 20px rgba(15,23,42,.08);
  --shadow-soft:    0 2px 8px  rgba(15,23,42,.06);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Merriweather', serif;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  min-height: 100vh;
  margin: 0;
  padding: 10px;
  background-color: var(--bg);
  color: var(--text);
}

a { text-decoration: none; }

h1, h2, h3, nav {
  font-family: 'Raleway', sans-serif;
  margin: 20px 0;
  font-weight: bold;
}

h1 { font-size: 32px; }
h3 { font-size: 24px; }

/* ============================================================
   LAYOUT
   ============================================================ */
.nav-wrapper {
  display: flex;
  max-width: 800px;
  max-height: 60px;
  justify-content:right;
}

nav {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

main,
.page {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 0;
}

.screen-title          { text-align: center; }
.screen-body-container { padding: 0 20px; text-align: left; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav-list {
  display: flex;
}

nav ul {
  display: flex;
  justify-content: center;
  gap: 0;
  list-style: none;
  padding: 0;
  margin: 0;
  background-color: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

nav ul li {
  display: flex;
  border-right: 1px solid var(--border);
}

nav ul li:last-child { border-right: none; }

.nav-button {
  height: 52px;
  padding: 0 20px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: var(--text-muted);
  border: none;
  border-radius: 0;
  box-shadow: none;
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
  transition: color 0.15s, background-color 0.15s;
  cursor: pointer;
}

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

/* ============================================================
   NAVIGATION RESPONSIVE
   ============================================================ */
@media (max-width: 700px) {
  .nav-button             { font-size: 12px; }
  .course-db-topbar  { align-items: stretch; }
  .course-db-buttons { margin-left: 0; }
}

/* ============================================================
   SHARED BTN-ICON
   ============================================================ */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-icon svg {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ============================================================
   ARROW BUTTONS
   ============================================================ */
.arrow-button,
.arrow-button-back {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  cursor: pointer;
  clip-path: none;
  margin-top: 35px;
  width: fit-content;
  text-decoration: none;
  outline: none;
  box-shadow: none;
  transition: background-color 0.15s, border-color 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}

.arrow-button { margin-left: auto; margin-right: 0; }
.arrow-button-back { margin-left: 0; margin-right: auto; }

.arrow-button:hover,
.arrow-button-back:hover {
  background-color: var(--surface-alt);
  border-color: var(--surface-alt);
  transform: none;
}

.arrow-button:focus,
.arrow-button:focus-visible,
.arrow-button-back:focus,
.arrow-button-back:focus-visible {
  outline: none;
  box-shadow: none;
}

.arrow-button:active,
.arrow-button-back:active { transform: scale(0.98); }

.arrow-button .btn-icon,
.arrow-button-back .btn-icon {
  width: 13px;
  height: 13px;
  background-color: transparent;
}

.arrow-button .btn-icon svg,
.arrow-button-back .btn-icon svg {
  width: 13px;
  height: 13px;
  stroke: var(--text);
}

.arrow-button:disabled,
.arrow-button.details-button {
  background-color: var(--surface-alt);
  color: var(--text-disabled);
  border-color: transparent;
  cursor: not-allowed;
}
.arrow-button:disabled:hover,
.arrow-button:disabled:active,
.arrow-button.details-button:hover,
.arrow-button.details-button:active {
  transform: none;
  filter: none;
  background-color: var(--surface-alt);
}

/* ============================================================
   SCHEDULE BUTTON (home CTA)
   ============================================================ */
.schedule-button {
  margin: 40px auto 0;
  padding: 35px 30px;
  font-size: 18px;
  display: block;
  width: fit-content;
  border-radius: 10px;
  background-color: var(--success);
  color: var(--success-on);
  box-shadow: var(--shadow);
  border: none;
  cursor: pointer;
  transition: transform 0.1s, filter 0.1s;
}
.schedule-button:hover  { transform: scale(1.05); }
.schedule-button:active { transform: scale(0.97); filter: brightness(0.85); }

/* ============================================================
   SCHEDULE MENU BUTTONS
   ============================================================ */
.schedule-menu { display: flex; flex-direction: column; gap: 10px; }

.sched-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  width: 100%;
  outline: none;
  box-shadow: none;
  transition: background-color 0.15s, border-color 0.15s, transform 0.1s;
}

.sched-btn:hover {
  background-color: var(--surface-alt);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}
.sched-btn:active { transform: scale(0.98); }

.sched-btn--warn {
  background-color: var(--warning-soft);
  color: var(--warning-text);
  border-color: var(--warning-border);
}
.sched-btn--warn:hover { background-color: #fdecc8; border-color: #e5b97a; }

.sched-btn--primary {
  background-color: var(--primary);
  color: var(--primary-on);
  border-color: var(--primary-hover);
}
.sched-btn--primary:hover { background-color: var(--primary-hover); }

.sched-btn:disabled {
  background-color: var(--surface-alt);
  color: var(--text-disabled);
  border-color: transparent;
  cursor: not-allowed;
}
.sched-btn:disabled:hover,
.sched-btn:disabled:active { transform: none; filter: none; }

.sched-btn .btn-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.06);
}
.sched-btn--primary .btn-icon { background-color: rgba(255, 255, 255, 0.18); }
.sched-btn--warn .btn-icon    { background-color: rgba(139, 90, 43, 0.12); }
.sched-btn .btn-icon svg      { width: 13px; height: 13px; stroke: currentColor; }

.btn-label   { flex: 1; text-align: left; }
.btn-chevron { flex-shrink: 0; }

/* ============================================================
   WARNINGS POPUP
   ============================================================ */
#warnings-popup {
  display: none;
  padding: 10px;
  background-color: var(--warning-soft);
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
  border-radius: 10px;
  margin-top: 5px;
  text-align: left;
}
#warnings-popup.open { display: block; }

/* ============================================================
   MISC BUTTONS
   ============================================================ */
.alarm-button,
.filter-button {
  height: 44px;
  padding: 0 18px;
  gap: 8px;
  font-size: 15px;
  border-radius: 999px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, transform 0.1s;
}
.alarm-button:hover,
.filter-button:hover {
  background-color: var(--surface-alt);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}
.alarm-button:active,
.filter-button:active { transform: scale(0.98); }

/* Add courses FAB */
.add-courses-button {
  position: fixed;
  bottom: 20px;
  right: max(20px, calc((100vw - 800px) / 2 + 20px));
  padding: 16px 20px;
  font-size: 16px;
  border: none;
  border-radius: 999px;
  background-color: var(--success);
  color: var(--success-on);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.1s, filter 0.1s;
}
.add-courses-button:hover  { transform: scale(1.05); }
.add-courses-button:active { transform: scale(0.97); filter: brightness(0.85); }
.add-courses-button:disabled {
  background-color: var(--surface-alt);
  color: var(--text-disabled);
  box-shadow: none;
  cursor: not-allowed;
}
.add-courses-button:disabled:hover,
.add-courses-button:disabled:active { transform: none; filter: none; }

/* ============================================================
   HOME PAGE
   ============================================================ */
.user-info {
  margin: 30px auto 0;
  width: fit-content;
  text-align: center;
  font-size: 18px;
}

.schedule-home,
.schedule-section { margin-top: 30px; }

.schedule-box,
.courses-box {
  width: 100%;
  min-height: 150px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.empty-schedule { font-size: 14px; }

/* ============================================================
   COURSE DATABASE
   ============================================================ */
.course-db-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  margin-bottom: 25px;
  flex-wrap: wrap;
}

.course-search-bar {
  flex: 1;
  min-width: 220px;
  max-width: 500px;
  height: 56px;
  padding: 0 22px;
  font-size: 17px;
  border-radius: 999px;
  outline: none;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  transition: border-color 0.15s;
}
.course-search-bar:focus { border-color: var(--primary); }

.course-db-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

/* ============================================================
   DROPDOWNS
   ============================================================ */
.course-dropdown { margin-bottom: 20px; }

.dropdown-toggle {
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  font-size: 18px;
  border-radius: 8px;
  background-color: var(--primary);
  color: var(--primary-on);
  border: 1px solid var(--primary-hover);
  cursor: pointer;
  transition: background-color 0.15s, transform 0.1s;
}
.dropdown-toggle:hover  { background-color: var(--primary-hover); }
.dropdown-toggle:active { transform: scale(0.98); }

.dropdown-content      { display: none; margin-top: 12px; }
.dropdown-content.open { display: block; }

/* ============================================================
   COURSE CARDS
   ============================================================ */
.course-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.course-card.selected {
  background-color: var(--primary-soft);
  border: 2px solid var(--primary);
}

.course-card.marked-for-removal {
  border: 2px solid #dc2626;
  background-color: #fef2f2;
}

.course-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.course-card-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.course-select-box { width: 18px; height: 18px; cursor: pointer; flex-shrink: 0; }
.course-name       { margin: 0; font-size: 24px; }
.course-card-icons { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.course-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background-color: var(--surface-alt);
  color: var(--text-muted);
  cursor: pointer;
}

.course-icon--hot {
  background-color: #fff1ec;
  color: #c05621;
}

.backup-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background-color: var(--surface-alt);
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.backup-button:hover  { background-color: var(--primary-soft); color: var(--primary); }
.backup-button.saved {
  background-color: #dcfce7;
  color: #16a34a;
}

/* Tooltip */
.icon-wrapper { position: relative; display: inline-flex; align-items: center; }
.icon-tooltip {
  position: absolute;
  bottom: 130%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--text);
  color: var(--surface);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  z-index: 10;
}
.icon-wrapper:hover .icon-tooltip { opacity: 1; }

.course-card-divider { height: 1px; background-color: var(--border); margin: 12px 0; }

.course-card-details h3,
.course-card h3 { margin: 0 0 10px; font-size: 20px; }
.course-card-details p,
.course-card p  { margin: 6px 0; font-size: 15px; }

.remove-class-button {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 25%;
  background-color: var(--surface-alt);
  color: red;
  font-size: 24px;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.remove-class-button:hover {
  transform: scale(1.05);
}

.remove-class-button:active {
  transform: scale(0.95);
}

/* ============================================================
   SCHEDULE TABLE
   ============================================================ */
table {
  width: 100%;
  font-size: 14px;
  border-spacing: 1px;
  background-color: var(--border);
  table-layout: auto;
  border-radius: 12px;
  border-collapse: separate;
  overflow: hidden;
  border: 1px solid var(--border);
}

th { padding: 15px; border-radius: 2px; }
td { background-color: var(--surface); padding: 15px; border-radius: 2px; }

td[data-course] { padding: 0; }

.table-header {
  background-color: var(--primary);
  color: var(--primary-on);
}

.sch-course-card {
  display: block;
  width: 100%;
  height: 100%;
  padding: 15px;
  background-color: var(--primary-soft);
  border-left: 4px solid var(--primary);
  color: var(--primary-hover);
  border-radius: 4px;
  font-weight: bold;
}

.table-data.selected td {
  background-color: var(--primary-soft);
  font-weight: 600;
}

.sch-content-text { padding-bottom: 30px; }

/* ============================================================
   INFO BOX
   ============================================================ */
.info-box {
  background-color: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
  line-height: 1.6;
}
.info-box ul { list-style: none; padding-left: 16px; }


/* ============================================================
   FILTER POPUP SCREEN
   ============================================================ */


.screen-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.screen-overlay.open {
  display: flex;
}

.filter-screen {
  width: 100%;
  max-width: 460px;
  background-color: var(--surface);
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.25);
  padding: 24px;
}

.filter-screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.filter-screen-header h2 {
  margin: 0;
  font-size: 24px;
}

.screen-close-button {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background-color: var(--surface-alt);
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
}

.filter-section {
  border-top: 1px solid var(--border);
  padding: 16px 0;
}

.filter-section h3 {
  margin: 0 0 10px 0;
  font-size: 16px;
}

.filter-section label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
  color: var(--text-muted);
  cursor: pointer;
}

.filter-section input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.filter-confirm-button {
  width: 100%;
  margin-top: 12px;
  padding: 14px 18px;
  border: none;
  border-radius: 14px;
  background-color: var(--primary);
  color: white;
  font-weight: 700;
  cursor: pointer;
}