/* ==========================================================================
   SRKR Objective Examination System (OExams) - Design System & Theme
   Based on srkr-ui-desgin.txt specifications
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@500;600;700;800&family=JetBrains+Mono:wght@500;600;700;800&display=swap');

:root {
  /* BRAND */
  --bs-primary: #8c1532;
  --bs-primary-hover: #a81c3c;
  --bs-primary-active: #6e0f27;
  --bs-primary-soft: #f9eef1;

  --bs-secondary: #8a384d;
  --bs-secondary-soft: #f2f4f7;

  /* BACKGROUNDS */
  --bs-body-bg: #f8f9fb;
  --bs-surface: #ffffff;
  --bs-surface-alt: #f5f7fa;
  --bs-surface-hover: #eef2f6;

  /* TEXT */
  --bs-text: #101828;
  --bs-text-secondary: #475467;
  --bs-text-muted: #667085;
  --bs-text-disabled: #98a2b3;
  --bs-text-white: #ffffff;

  /* STATUS */
  --bs-success: #16a34a;
  --bs-success-bg: #ecfdf3;
  --bs-warning: #d97706;
  --bs-warning-bg: #fff7ed;
  --bs-danger: #dc2626;
  --bs-danger-bg: #fef2f2;
  --bs-info: #0284c7;
  --bs-info-bg: #f0f9ff;

  /* BORDERS */
  --bs-border-color: #e4e7ec;
  --bs-border-light: #f2f4f7;

  /* BORDER RADIUS - Modern Clean Curvature */
  --bs-radius: 8px;
  --bs-radius-sm: 6px;
  --bs-radius-lg: 12px;
  --bs-radius-xl: 16px;

  /* SHADOWS */
  --bs-shadow-xs: 0 1px 2px rgba(16, 24, 40, .03);
  --bs-shadow-sm: 0 2px 8px rgba(16, 24, 40, .05);
  --bs-shadow: 0 6px 18px rgba(16, 24, 40, .06);
  --bs-shadow-lg: 0 12px 30px rgba(16, 24, 40, .08);

  /* TYPOGRAPHY */
  --bs-font-family: "Inter", "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bs-font-mono: "JetBrains Mono", monospace;

  --bs-font-size-xs: .75rem;
  --bs-font-size-sm: .875rem;
  --bs-font-size: 1rem;
  --bs-font-size-lg: 1.125rem;
  --bs-font-size-xl: 1.25rem;
  --bs-font-size-2xl: 1.5rem;

  --bs-font-weight-normal: 400;
  --bs-font-weight-medium: 500;
  --bs-font-weight-semibold: 600;
  --bs-font-weight-bold: 700;
  --bs-line-height: 1.5;
}

/* Universal Sharp Border Radius */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--bs-font-family);
  background-color: var(--bs-body-bg);
  color: var(--bs-text);
  line-height: var(--bs-line-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', var(--bs-font-family);
  font-weight: 700;
  color: var(--bs-text);
  letter-spacing: -0.02em;
}

/* --------------------------------------------------
   BUTTONS
-------------------------------------------------- */
.btn {
  font-family: var(--bs-font-family);
  font-weight: var(--bs-font-weight-semibold);
  font-size: var(--bs-font-size-sm);
  border-radius: 8px !important;
  padding: 0.6rem 1.25rem;
  transition: all 0.15s ease-in-out;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  touch-action: manipulation;
}

.btn-primary {
  background-color: var(--bs-primary) !important;
  border-color: var(--bs-primary) !important;
  color: var(--bs-text-white) !important;
  box-shadow: var(--bs-shadow-xs);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--bs-primary-hover) !important;
  border-color: var(--bs-primary-hover) !important;
  color: var(--bs-text-white) !important;
  box-shadow: var(--bs-shadow-sm);
}

.btn-primary:active {
  background-color: var(--bs-primary-active) !important;
  border-color: var(--bs-primary-active) !important;
}

.btn-outline-primary {
  background-color: transparent !important;
  border: 1px solid var(--bs-primary) !important;
  color: var(--bs-primary) !important;
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background-color: var(--bs-primary) !important;
  color: var(--bs-text-white) !important;
}

.btn-soft-primary {
  background-color: var(--bs-primary-soft) !important;
  border: 1px solid rgba(140, 21, 50, 0.2) !important;
  color: var(--bs-primary) !important;
  font-weight: var(--bs-font-weight-semibold);
}

.btn-soft-primary:hover {
  background-color: var(--bs-primary) !important;
  color: var(--bs-text-white) !important;
}

.btn-secondary {
  background-color: var(--bs-secondary) !important;
  border-color: var(--bs-secondary) !important;
  color: #fff !important;
}

.btn-outline-secondary {
  border-color: var(--bs-border-color) !important;
  color: var(--bs-text-secondary) !important;
  background-color: var(--bs-surface) !important;
}

.btn-outline-secondary:hover {
  background-color: var(--bs-surface-hover) !important;
  color: var(--bs-text) !important;
  border-color: var(--bs-text-muted) !important;
}

.btn-success {
  background-color: var(--bs-success) !important;
  border-color: var(--bs-success) !important;
  color: #fff !important;
}

.btn-warning {
  background-color: var(--bs-warning) !important;
  border-color: var(--bs-warning) !important;
  color: #fff !important;
}

.btn-danger {
  background-color: var(--bs-danger) !important;
  border-color: var(--bs-danger) !important;
  color: #fff !important;
}

/* --------------------------------------------------
   CARDS & CONTAINERS
-------------------------------------------------- */
.card, .srkr-card {
  background-color: var(--bs-surface);
  border: 1px solid var(--bs-border-color) !important;
  border-radius: 12px !important;
  box-shadow: var(--bs-shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
}

.srkr-card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--bs-shadow);
  border-color: #cbd5e1 !important;
}

.card-header {
  background-color: var(--bs-surface);
  border-bottom: 1px solid var(--bs-border-color);
  font-weight: 700;
  border-top-left-radius: 11px !important;
  border-top-right-radius: 11px !important;
  border-bottom-left-radius: 0 !important;
  border-bottom-right-radius: 0 !important;
  padding: 1rem 1.25rem;
}

.card-header-primary {
  background-color: var(--bs-primary) !important;
  color: #ffffff !important;
  border-bottom: none !important;
}

/* --------------------------------------------------
   BADGES & PILLS
-------------------------------------------------- */
.badge {
  border-radius: 6px !important;
  padding: 0.35rem 0.65rem;
  font-weight: var(--bs-font-weight-semibold);
  font-size: var(--bs-font-size-xs);
  letter-spacing: 0.5px;
}

.badge-primary, .badge-srkr {
  background-color: var(--bs-primary-soft) !important;
  color: var(--bs-primary) !important;
  border: 1px solid rgba(140, 21, 50, 0.2);
}

.badge-success-soft {
  background-color: var(--bs-success-bg) !important;
  color: var(--bs-success) !important;
  border: 1px solid rgba(22, 163, 74, 0.25);
}

.badge-warning-soft {
  background-color: var(--bs-warning-bg) !important;
  color: var(--bs-warning) !important;
  border: 1px solid rgba(217, 119, 6, 0.25);
}

.badge-danger-soft {
  background-color: var(--bs-danger-bg) !important;
  color: var(--bs-danger) !important;
  border: 1px solid rgba(220, 38, 38, 0.25);
}

.badge-info-soft {
  background-color: var(--bs-info-bg) !important;
  color: var(--bs-info) !important;
  border: 1px solid rgba(2, 132, 199, 0.25);
}

/* --------------------------------------------------
   FORMS & INPUTS
-------------------------------------------------- */
.form-control, .form-select, input[type="text"], input[type="number"], input[type="file"], textarea {
  border-radius: 8px !important;
  border: 1px solid var(--bs-border-color);
  background-color: var(--bs-surface);
  color: var(--bs-text);
  font-family: var(--bs-font-family);
  font-size: var(--bs-font-size-sm);
  padding: 0.65rem 0.85rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

/* Distinct select styling to eliminate inner clipping of option text */
select, select.form-control, .form-select {
  border-radius: 8px !important;
  border: 1px solid var(--bs-border-color);
  background-color: var(--bs-surface);
  color: var(--bs-text);
  font-family: var(--bs-font-family);
  font-size: var(--bs-font-size-sm);
  padding: 0.35rem 1.75rem 0.35rem 0.65rem !important;
  height: calc(1.5em + 0.75rem + 2px) !important;
  min-height: 38px !important;
  line-height: 1.45 !important;
  vertical-align: middle !important;
  box-sizing: border-box !important;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

select.form-control-sm {
  padding: 0.25rem 1.5rem 0.25rem 0.5rem !important;
  height: calc(1.5em + 0.5rem + 2px) !important;
  min-height: 32px !important;
  font-size: 0.84rem !important;
  line-height: 1.35 !important;
}

select option {
  padding: 6px 10px !important;
  font-size: 0.875rem !important;
  color: #101828 !important;
  background-color: #ffffff !important;
  white-space: normal !important;
  word-break: break-word !important;
}

.form-control:focus, select:focus, input:focus, textarea:focus {
  border-color: var(--bs-primary) !important;
  box-shadow: 0 0 0 3px rgba(140, 21, 50, 0.12) !important;
  outline: none;
}

/* --------------------------------------------------
   NAVBAR & HEADER
-------------------------------------------------- */
.srkr-navbar {
  background: var(--bs-primary);
  border-bottom: 2px solid #5a0b1f;
  box-shadow: var(--bs-shadow);
  padding: 0.85rem 1.5rem;
}

.srkr-navbar .navbar-brand {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.15rem;
}

.brand-badge {
  background: #ffffff;
  color: var(--bs-primary);
  font-weight: 800;
  padding: 3px 8px;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

/* --------------------------------------------------
   5-DIGIT CODES & MONOSPACE BADGES
-------------------------------------------------- */
.exam-code-pill {
  font-family: var(--bs-font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 4px;
  background-color: var(--bs-primary-soft);
  color: var(--bs-primary);
  border: 2px dashed var(--bs-primary);
  padding: 6px 16px;
  display: inline-block;
  border-radius: 9999px !important;
}

.result-code-pill {
  font-family: var(--bs-font-mono);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 4px;
  background-color: var(--bs-success-bg);
  color: var(--bs-success);
  border: 2px dashed var(--bs-success);
  padding: 6px 16px;
  display: inline-block;
  border-radius: 9999px !important;
}

.code-input-box {
  font-family: var(--bs-font-mono);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 6px;
  text-align: center;
  text-transform: uppercase;
  border: 2px solid var(--bs-primary) !important;
  background: var(--bs-surface);
  color: var(--bs-primary);
  border-radius: 8px !important;
}

/* --------------------------------------------------
   TABLES
-------------------------------------------------- */
.table {
  color: var(--bs-text);
  margin-bottom: 0;
}

.table th {
  background-color: var(--bs-surface-alt);
  color: var(--bs-text-secondary);
  font-weight: var(--bs-font-weight-bold);
  font-size: var(--bs-font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  border-bottom: 2px solid var(--bs-border-color);
  padding: 12px 14px;
}

.table td {
  vertical-align: middle;
  border-color: var(--bs-border-light);
  padding: 12px 14px;
  font-size: var(--bs-font-size-sm);
}

.table-hover tbody tr:hover {
  background-color: var(--bs-surface-hover);
}

/* --------------------------------------------------
   MODALS
-------------------------------------------------- */
.modal-content {
  border-radius: 16px !important;
  border: 1px solid var(--bs-border-color);
  box-shadow: var(--bs-shadow-lg);
  overflow: hidden;
}

.modal-header {
  border-bottom: 1px solid var(--bs-border-color);
  background-color: var(--bs-surface-alt);
  border-top-left-radius: 15px !important;
  border-top-right-radius: 15px !important;
  border-bottom-left-radius: 0 !important;
  border-bottom-right-radius: 0 !important;
  padding: 1rem 1.25rem;
}

.modal-footer {
  border-top: 1px solid var(--bs-border-color);
  background-color: var(--bs-surface-alt);
  border-bottom-left-radius: 15px !important;
  border-bottom-right-radius: 15px !important;
  border-top-left-radius: 0 !important;
  border-top-right-radius: 0 !important;
  padding: 0.85rem 1.25rem;
}

/* Modal scrolling support for desktop and mobile */
.modal-dialog-scrollable {
  max-height: calc(100% - 2rem) !important;
  display: flex !important;
}

.modal-dialog-scrollable .modal-content {
  max-height: calc(100vh - 2rem) !important;
  overflow: hidden !important;
  display: flex !important;
  flex-direction: column !important;
}

.modal-dialog-scrollable .modal-body {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  flex: 1 1 auto !important;
}

@media (max-width: 767.98px) {
  .modal-dialog-scrollable {
    max-height: calc(100% - 1rem) !important;
    margin: 0.5rem !important;
  }
  .modal-dialog-scrollable .modal-content {
    max-height: calc(100vh - 1rem) !important;
  }
  .modal-dialog-scrollable .modal-body {
    max-height: calc(100vh - 140px) !important;
    padding-bottom: calc(30px + env(safe-area-inset-bottom, 0px)) !important;
  }
}

/* --------------------------------------------------
   MOBILE RESPONSIVENESS & TOUCH OPTIMIZATIONS
-------------------------------------------------- */
@media (max-width: 767.98px) {
  :root {
    --bs-font-size-2xl: 1.25rem;
    --bs-font-size-xl: 1.125rem;
    --bs-font-size-lg: 1rem;
    --bs-font-size: 0.9375rem;
    --bs-font-size-sm: 0.8125rem;
    --bs-font-size-xs: 0.7rem;
  }

  body {
    font-size: var(--bs-font-size);
  }

  .container, .container-fluid {
    padding-left: 12px !important;
    padding-right: 12px !important;
  }

  .srkr-navbar {
    padding: 0.65rem 1rem !important;
  }

  .srkr-navbar .navbar-brand {
    font-size: 1.05rem !important;
  }

  .btn {
    min-height: 44px;
    padding: 0.55rem 1rem;
    font-size: 0.875rem;
  }

  .btn-sm {
    min-height: 36px;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
  }

  .exam-code-pill, .result-code-pill {
    font-size: 1.15rem !important;
    padding: 6px 12px !important;
    letter-spacing: 2px !important;
  }

  .code-input-box, .code-input-lg {
    font-size: 22px !important;
    letter-spacing: 4px !important;
    padding: 10px 12px !important;
  }

  /* Horizontally scrollable navigation tabs */
  .nav-pills-scrollable {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-bottom: 6px !important;
    margin-bottom: 1rem !important;
    scrollbar-width: none !important;
  }
  /* ========================================================
     NATIVE APP-FEEL MOBILE UX & TYPOGRAPHY ENHANCEMENTS
     ======================================================== */
  body {
    font-size: 0.9375rem !important;
    background-color: #f7f8fa !important;
    -webkit-font-smoothing: antialiased !important;
    -moz-osx-font-smoothing: grayscale !important;
    -webkit-tap-highlight-color: transparent;
  }

  /* Refine heavy desktop bold fonts into crisp, modern semibold */
  h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', var(--bs-font-family) !important;
    font-weight: 600 !important;
    letter-spacing: -0.015em !important;
  }
  h1 { font-size: 1.45rem !important; }
  h2 { font-size: 1.3rem !important; }
  h3 { font-size: 1.18rem !important; line-height: 1.35 !important; }
  h4 { font-size: 1.05rem !important; }
  h5 { font-size: 0.98rem !important; }
  h6 { font-size: 0.88rem !important; }

  .font-weight-bold {
    font-weight: 600 !important;
  }

  /* Native App rounded cards */
  .card, .srkr-card, .profile-card, .exam-card, .question-card {
    border-radius: 12px !important;
    border: 1px solid rgba(16, 24, 40, 0.08) !important;
    box-shadow: 0 2px 8px rgba(16, 24, 40, 0.03) !important;
    padding: 1rem !important;
    background: #ffffff !important;
  }

  .card-header {
    border-top-left-radius: 12px !important;
    border-top-right-radius: 12px !important;
  }

  /* Mobile App touch buttons */
  .btn {
    border-radius: 8px !important;
    min-height: 42px !important;
    font-weight: 500 !important;
    letter-spacing: 0.01em !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: transform 0.1s ease, background-color 0.15s ease !important;
  }
  .btn:active {
    transform: scale(0.98) !important;
  }
  .btn-sm {
    min-height: 34px !important;
    padding: 4px 12px !important;
    font-size: 0.82rem !important;
  }
  .btn-lg {
    min-height: 48px !important;
    font-size: 1rem !important;
    border-radius: 10px !important;
  }

  /* Native App Inputs & Selects */
  .form-control {
    border-radius: 8px !important;
    min-height: 42px !important;
    font-size: 0.92rem !important;
    font-weight: 400 !important;
    border-color: #d0d5dd !important;
  }
  select.form-control, select {
    border-radius: 8px !important;
    min-height: 42px !important;
    padding-top: 0.35rem !important;
    padding-bottom: 0.35rem !important;
    padding-left: 0.65rem !important;
    padding-right: 1.75rem !important;
    line-height: 1.4 !important;
  }
  .form-control:focus, select:focus {
    box-shadow: 0 0 0 3px rgba(140, 21, 50, 0.12) !important;
    border-color: var(--bs-primary) !important;
  }
  .form-control-sm {
    min-height: 36px !important;
    font-size: 0.84rem !important;
  }
  select.form-control-sm {
    min-height: 34px !important;
    padding-top: 0.2rem !important;
    padding-bottom: 0.2rem !important;
    padding-left: 0.5rem !important;
    font-size: 0.84rem !important;
  }

  /* Native App Pills & Badges */
  .badge {
    border-radius: 999px !important;
    font-weight: 500 !important;
    font-size: 0.72rem !important;
    padding: 5px 10px !important;
    letter-spacing: 0.01em !important;
  }

  /* Scrollable Nav Pills (Instagram/Twitter style horizontal chip bar) */
  .nav-pills-scrollable {
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-bottom: 6px !important;
    margin-bottom: 1rem !important;
    scrollbar-width: none !important;
    gap: 8px !important;
  }
  .nav-pills-scrollable::-webkit-scrollbar {
    display: none !important;
  }
  .nav-pills-scrollable .nav-item {
    flex: 0 0 auto !important;
  }
  .nav-pills-scrollable .nav-link {
    white-space: nowrap !important;
    font-size: 0.82rem !important;
    font-weight: 500 !important;
    padding: 8px 16px !important;
    border-radius: 999px !important;
    border: 1px solid #e4e7ec !important;
    background: #ffffff !important;
    color: var(--bs-text-secondary) !important;
  }
  .nav-pills-scrollable .nav-link.active {
    background: var(--bs-primary) !important;
    border-color: var(--bs-primary) !important;
    color: #ffffff !important;
    box-shadow: 0 2px 6px rgba(140, 21, 50, 0.25) !important;
  }

  /* Native Modal Bottom Sheet / Mobile Card */
  .modal-dialog {
    margin: 0.5rem !important;
  }
  .modal-content {
    border-radius: 16px !important;
    border: none !important;
    box-shadow: 0 10px 30px rgba(16, 24, 40, 0.18) !important;
    overflow: hidden !important;
  }
  .modal-header {
    padding: 1rem 1.25rem !important;
  }

  /* Native App Touch Options for Exam Runner */
  .option-label {
    padding: 12px 14px !important;
    min-height: 52px !important;
    border-radius: 10px !important;
    border: 1.5px solid #eaecf0 !important;
    background: #ffffff !important;
    transition: all 0.15s ease !important;
  }
  .option-label:active {
    background: #fdf2f4 !important;
  }
  .option-indicator {
    width: 28px !important;
    height: 28px !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    border-radius: 50% !important;
    margin-right: 12px !important;
  }

  /* Mobile Fixed Bottom Action Bar for Exam Runner */
  .exam-mobile-bottombar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid rgba(16, 24, 40, 0.1);
    box-shadow: 0 -4px 20px rgba(16, 24, 40, 0.08);
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px)) 12px !important;
    z-index: 1040;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
  }

  .exam-mobile-bottombar .btn {
    min-height: 44px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 0.92rem !important;
    border-radius: 8px !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  .exam-mobile-bottombar .btn:active {
    transform: scale(0.97);
  }

  /* Add padding to body when mobile bottom bar is active */
  body.has-mobile-bottombar {
    padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px)) !important;
  }

  /* Prevent iOS Auto-Zoom on form inputs */
  input, select, textarea {
    font-size: 16px !important;
  }

  /* Touch-friendly code cards */
  .exam-code-pill, .result-code-pill {
    padding: 8px 14px !important;
    font-size: 1.15rem !important;
    letter-spacing: 2px !important;
    border-radius: 8px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }
  .exam-code-pill:active, .result-code-pill:active {
    transform: scale(0.96);
  }

  /* Bottom sheet modal on mobile */
  .modal-dialog-bottom {
    margin: 0 !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    max-width: 100% !important;
  }
  .modal-dialog-bottom .modal-content {
    border-bottom-left-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    border-top-left-radius: 20px !important;
    border-top-right-radius: 20px !important;
    max-height: 85vh !important;
  }
  .modal-dialog-bottom .modal-body {
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px)) !important;
  }
}

/* --------------------------------------------------
   GLOBAL TOUCH & MOBILE HELPERS
   -------------------------------------------------- */
.touch-card {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
}
.touch-card:active {
  transform: scale(0.985);
}

.big-code-hero {
  font-family: var(--bs-font-mono), monospace;
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: 8px;
  color: var(--bs-primary);
  text-align: center;
  line-height: 1.1;
  text-shadow: 0 2px 4px rgba(140, 21, 50, 0.15);
}
@media (max-width: 576px) {
  .big-code-hero {
    font-size: 2.8rem;
    letter-spacing: 5px;
  }
}

/* --------------------------------------------------
   COLLAPSIBLE SIDEBAR / DRAWER FOR STUDENT DASHBOARD
-------------------------------------------------- */
.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1045;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.sidebar-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.student-sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 320px;
  max-width: 86vw;
  background: #ffffff;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 30px rgba(0, 0, 0, 0.18);
  transform: translateX(-100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.student-sidebar.show {
  transform: translateX(0);
}

.student-avatar-sidebar {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 50% !important;
  background: linear-gradient(135deg, var(--bs-primary), var(--bs-primary-hover));
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(140, 21, 50, 0.25);
}

.sidebar-link {
  display: flex;
  align-items: center;
  padding: 11px 14px;
  color: var(--bs-text);
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 10px !important;
  text-decoration: none !important;
  margin-bottom: 3px;
  transition: background 0.15s ease, color 0.15s ease;
}

.sidebar-link:hover, .sidebar-link:focus {
  background: var(--bs-surface-alt);
  color: var(--bs-primary);
}

.sidebar-link.active {
  background: var(--bs-primary-soft);
  color: var(--bs-primary);
}

.avatar-pill-sm {
  width: 26px;
  height: 26px;
  border-radius: 50% !important;
  background: rgba(255, 255, 255, 0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  color: #ffffff;
}

/* ========================================================
   SCHEDULE INTERACTIVE CALENDAR & FILTERS (ERP MAPPED)
   ======================================================== */
.schedule-calendar-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 1rem;
  margin-bottom: 1rem;
}

.cal-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #edf2f7;
}

.cal-nav-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.cal-month-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1a202c;
  min-width: 145px;
  text-align: center;
}

.cal-weekdays-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 6px;
  text-align: center;
}

.cal-weekday {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #718096;
  letter-spacing: 0.5px;
  padding: 4px 0;
}

.cal-days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
}

.cal-day-cell {
  min-height: 56px;
  border-radius: 10px;
  padding: 5px 3px 3px 3px;
  background: #f8fafc;
  border: 1px solid #edf2f7;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease-in-out;
  user-select: none;
}

.cal-day-cell:hover:not(.empty) {
  background: #edf2f7;
  border-color: #cbd5e0;
  transform: translateY(-1px);
}

.cal-day-cell.empty {
  background: transparent;
  border-color: transparent;
  cursor: default;
}

.cal-day-cell.today {
  border: 2px solid var(--bs-primary);
  background: #ffffff;
}

.cal-day-cell.today .cal-day-num {
  font-weight: 800;
  color: var(--bs-primary);
}

.cal-day-cell.has-sessions {
  background: #ffffff;
  border-color: #e2e8f0;
}

.cal-day-cell.selected {
  background: var(--bs-primary) !important;
  border-color: var(--bs-primary) !important;
  color: #ffffff !important;
  box-shadow: 0 4px 10px rgba(140, 21, 50, 0.35);
  transform: scale(1.02);
  z-index: 2;
}

.cal-day-num {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.1;
  color: #2d3748;
}

.cal-day-cell.selected .cal-day-num {
  color: #ffffff !important;
}

.cal-day-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  margin-top: auto;
  padding-top: 3px;
  min-height: 10px;
  max-width: 100%;
}

.cal-session-dot {
  width: 6px;
  height: 6px;
  border-radius: 50% !important;
  background-color: var(--bs-primary);
  display: inline-block;
  transition: transform 0.15s;
}

.cal-day-cell.selected .cal-session-dot {
  background-color: #ffffff !important;
}

.cal-more-dots {
  font-size: 0.65rem;
  font-weight: 800;
  line-height: 1;
  color: var(--bs-primary);
}

.cal-day-cell.selected .cal-more-dots {
  color: #ffffff !important;
}

.schedule-active-banner {
  background: #fdf2f4;
  border: 1px solid #f8d7da;
  border-left: 4px solid var(--bs-primary);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

@media (max-width: 576px) {
  .schedule-calendar-card {
    padding: 0.65rem;
  }
  .cal-day-cell {
    min-height: 48px;
    padding: 4px 2px;
  }
  .cal-day-num {
    font-size: 0.8rem;
  }
  .cal-session-dot {
    width: 5px;
    height: 5px;
  }
  .cal-weekday {
    font-size: 0.68rem;
  }
  .cal-month-title {
    font-size: 0.95rem;
    min-width: 120px;
  }
}

/* ========================================================
   GLOBAL MODERN BORDER RADII (ELIMINATES ZERO RADII)
   ======================================================== */
.card, .srkr-card, .profile-card, .exam-card, .question-card {
  border-radius: 12px !important;
}
.card-header:first-child {
  border-top-left-radius: 12px !important;
  border-top-right-radius: 12px !important;
}
.card-footer:last-child {
  border-bottom-left-radius: 12px !important;
  border-bottom-right-radius: 12px !important;
}
.btn {
  border-radius: 8px !important;
}
.btn-sm {
  border-radius: 6px !important;
}
.btn-lg {
  border-radius: 10px !important;
}
.form-control, .form-select, select, textarea, input {
  border-radius: 8px !important;
}
.badge {
  border-radius: 6px !important;
}
.alert {
  border-radius: 10px !important;
}
.modal-content {
  border-radius: 16px !important;
}
.step-pill {
  border-radius: 50% !important;
}
.table-bordered, .table-responsive {
  border-radius: 10px !important;
  overflow: hidden;
}
.bg-light.border, .p-3.border, .p-2.border, .p-4.border {
  border-radius: 10px !important;
}
.exam-code-pill, .result-code-pill {
  border-radius: 8px !important;
}
.nav-pills .nav-link {
  border-radius: 8px !important;
}
.input-group > .form-control:not(:first-child),
.input-group > .custom-select:not(:first-child) {
  border-top-right-radius: 8px !important;
  border-bottom-right-radius: 8px !important;
}
.input-group > .form-control:not(:last-child),
.input-group > .custom-select:not(:last-child) {
  border-top-left-radius: 8px !important;
  border-bottom-left-radius: 8px !important;
}
.input-group-append .btn, .input-group-append .input-group-text {
  border-top-right-radius: 8px !important;
  border-bottom-right-radius: 8px !important;
}
.input-group-prepend .btn, .input-group-prepend .input-group-text {
  border-top-left-radius: 8px !important;
  border-bottom-left-radius: 8px !important;
}