/* ==========================================================================
   Blucor Techno Exam Portal — Visual System
   Theme: Crisp Clean White Background + Logo Circuit Green (#2e7d32 / #3fae5b)
   Palette drawn directly from the Blucor Techno logo.
   ========================================================================== */

:root {
  --bg-body:      #ffffff;
  --bg-surface:   #ffffff;
  --bg-subtle:    #f8fafc;
  --bg-card:      #ffffff;
  --bg-panel-2:   #f0fdf4;
  --line:         #e2e8f0;
  --line-green:   #bbf7d0;
  
  /* Logo Green Palette */
  --logo-green:     #2e7d32;
  --logo-green-dark:#1b5e20;
  --logo-green-deep:#0f5132;
  --lime:           #8bc93f;
  --green:          #3fae5b;
  --teal-real:      #2fa08c;
  --cyan:           #1f8fc0;
  
  /* High contrast text */
  --text:         #1f2937;
  --text-dim:     #4b5563;
  --text-green:   #1b5e20;
  --text-green-sub:#2e7d32;
  
  --grad: linear-gradient(100deg, var(--lime) 0%, var(--green) 35%, var(--teal-real) 70%, var(--cyan) 100%);
  --grad-green: linear-gradient(135deg, #2e7d32 0%, #3fae5b 100%);
  
  --radius: 14px;
  --shadow: 0 10px 30px -8px rgba(46, 125, 50, 0.12);
  --shadow-lg: 0 20px 40px -12px rgba(46, 125, 50, 0.18);
  
  --font-display: "Sora", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-body);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  min-height: 100vh;
}

h1, h2, h3, h4, .display-font {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  color: var(--logo-green-dark);
}

a { color: var(--logo-green); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--logo-green-dark); }
::selection { background: #bbf7d0; color: #14532d; }

/* Subtle light circuit-trace background on white */
.circuit-bg {
  position: fixed; inset: 0; z-index: -1; opacity: .45; pointer-events: none;
  background-image:
    linear-gradient(#f1f5f9 1px, transparent 1px),
    linear-gradient(90deg, #f1f5f9 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at 50% 20%, black, transparent 85%);
}

/* ---------------- Navbar ---------------- */
.bt-navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}
.bt-navbar .navbar-brand { display: flex; align-items: center; gap: .65rem; }
.bt-navbar .brand-logo { height: 38px; width: auto; display: block; }
.bt-navbar .brand-sub { font-size: .75rem; color: var(--text-dim); letter-spacing: .02em; }
.bt-navbar .nav-link { color: var(--logo-green-dark); font-weight: 600; padding: .5rem .85rem; border-radius: 8px; }
.bt-navbar .nav-link:hover, .bt-navbar .nav-link.active { color: var(--logo-green); background: #f0fdf4; }

.lang-switch select {
  background: #ffffff; color: var(--logo-green-dark); border: 1.5px solid var(--line-green);
  border-radius: 8px; padding: .35rem .75rem; font-size: .88rem; font-weight: 600;
}
.lang-switch select:focus { outline: none; border-color: var(--logo-green); box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15); }

/* ---------------- Buttons ---------------- */
.btn-grad {
  background: var(--grad);
  color: #04140f;
  border: none;
  font-weight: 700;
  padding: .72rem 1.6rem;
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}
.btn-grad:hover {
  transform: translateY(-2px);
  color: #04140f;
  box-shadow: var(--shadow-lg);
}

.btn-solid-green {
  background: var(--logo-green);
  color: #ffffff !important;
  border: none;
  font-weight: 700;
  padding: .72rem 1.6rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(46, 125, 50, 0.25);
  transition: transform .18s ease, background .18s ease;
}
.btn-solid-green:hover {
  background: var(--logo-green-dark);
  transform: translateY(-2px);
}

.btn-outline-grad {
  background: #ffffff;
  border: 1.5px solid var(--logo-green);
  color: var(--logo-green) !important;
  padding: .68rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  transition: background .15s ease, transform .15s ease, color .15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
}
.btn-outline-grad:hover {
  background: #f0fdf4;
  color: var(--logo-green-dark) !important;
  transform: translateY(-2px);
  border-color: var(--logo-green-dark);
}

.btn-excel {
  background: #107c41; /* Microsoft Excel Green */
  color: #ffffff !important;
  border: none;
  font-weight: 700;
  padding: .65rem 1.3rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(16, 124, 65, 0.25);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: transform .15s ease, background .15s ease;
}
.btn-excel:hover {
  background: #0b5a2f;
  transform: translateY(-2px);
}

/* ---------------- Hero ---------------- */
.hero { padding: 5.5rem 0 4.5rem; position: relative; overflow: hidden; background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%); }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: .5rem; color: var(--logo-green);
  font-size: .88rem; font-weight: 700; margin-bottom: 1.1rem;
  background: #e8f5e9; padding: .35rem .85rem; border-radius: 999px; border: 1px solid var(--line-green);
}
.hero .eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 8px var(--green); }
.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem); font-weight: 800; line-height: 1.15; max-width: 16ch;
  color: var(--logo-green-dark);
}
.hero h1 .accent {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { color: var(--text-dim); font-size: 1.12rem; max-width: 48ch; margin: 1.25rem 0 2rem; }
.hero .cta-row { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; animation: floaty 6s ease-in-out infinite; }

@keyframes floaty { 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce){ .hero-art svg { animation: none; } }

/* ---------------- Feature Cards ---------------- */
.section-pad { padding: 4.5rem 0; }
.section-title { font-size: clamp(1.6rem, 2.8vw, 2.2rem); font-weight: 700; margin-bottom: 2.2rem; color: var(--logo-green-dark); }
.feature-card {
  background: #ffffff;
  border: 1.5px solid var(--line-green);
  border-radius: var(--radius);
  padding: 1.8rem;
  height: 100%;
  box-shadow: var(--shadow);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--logo-green);
  box-shadow: var(--shadow-lg);
}
.feature-card .icon-wrap {
  width: 50px; height: 50px; border-radius: 12px; background: var(--grad);
  display: flex; align-items: center; justify-content: center; margin-bottom: 1.1rem;
}
.feature-card .icon-wrap svg { width: 26px; height: 26px; stroke: #04140f; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: .5rem; color: var(--logo-green-dark); font-weight: 700; }
.feature-card p { color: var(--text-dim); font-size: .95rem; margin: 0; }

/* ---------------- Panels / Cards / Forms ---------------- */
.bt-panel {
  background: #ffffff;
  border: 1.5px solid var(--line-green);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.bt-panel .panel-head { padding: 1.6rem 1.8rem 0; }
.bt-panel .panel-head h2 { color: var(--logo-green-dark); font-weight: 800; }
.bt-panel .panel-body { padding: 1.8rem; }

.form-label { color: var(--logo-green-dark); font-weight: 700; font-size: .9rem; margin-bottom: .4rem; }
.form-control, .form-select {
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  color: #1f2937;
  border-radius: 10px;
  padding: .68rem .9rem;
  font-size: .95rem;
}
.form-control:focus, .form-select:focus {
  background: #ffffff;
  color: #1f2937;
  border-color: var(--logo-green);
  box-shadow: 0 0 0 .25rem rgba(46, 125, 50, 0.18);
}
.form-control::placeholder { color: #94a3b8; }
.form-text { color: #64748b; font-size: .84rem; }
.invalid-feedback { color: #dc2626; font-weight: 600; font-size: .84rem; }

/* ---------------- Exam Page ---------------- */
.exam-topbar {
  position: sticky; top: 62px; z-index: 40;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1.5px solid var(--line-green);
  padding: .9rem 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
#examTitleBar { color: var(--logo-green-dark); font-size: 1.1rem; }
.timer-pill {
  display: inline-flex; align-items: center; gap: .5rem; font-family: var(--font-display);
  font-weight: 700; font-size: 1.05rem; background: #f0fdf4; border: 1.5px solid var(--line-green);
  color: var(--logo-green-dark); padding: .45rem .95rem; border-radius: 999px;
}
.timer-pill.low { color: #dc2626; border-color: #fca5a5; background: #fef2f2; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity: 1;} 50%{opacity: .6;} }

.q-nav-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: .5rem; }
.q-nav-btn {
  width: 40px; height: 40px; border-radius: 8px; border: 1.5px solid #cbd5e1;
  background: #ffffff; color: #475569; font-size: .85rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: all .15s ease;
}
.q-nav-btn:hover { border-color: var(--logo-green); color: var(--logo-green); background: #f0fdf4; }
.q-nav-btn.answered { background: #dcfce7; border-color: #22c55e; color: #15803d; font-weight: 800; }
.q-nav-btn.current { outline: 2.5px solid var(--logo-green); outline-offset: 2px; }

.section-badge {
  display: inline-block; font-size: .78rem; font-weight: 800; letter-spacing: .04em;
  color: #04140f; background: var(--grad); padding: .32rem .8rem; border-radius: 999px; margin-bottom: 1.1rem;
}
.option-tile {
  display: flex; gap: .85rem; align-items: flex-start; padding: .95rem 1.1rem;
  border: 1.5px solid #e2e8f0; border-radius: 10px; background: #ffffff;
  cursor: pointer; transition: border-color .15s ease, background .15s ease;
  font-weight: 500; color: #334155;
}
.option-tile:hover { border-color: var(--logo-green); background: #f0fdf4; color: var(--logo-green-dark); }
.option-tile.selected { border-color: var(--logo-green); background: #ecfdf5; color: var(--logo-green-dark); font-weight: 700; box-shadow: 0 0 0 1px var(--logo-green); }
.option-tile input { margin-top: .25rem; accent-color: var(--logo-green); }

/* ---------------- Q&A Typing Box (Questions 27-39) ---------------- */
.marks-badge {
  display: inline-flex; align-items: center; font-size: .82rem; font-weight: 700;
  color: var(--logo-green-dark); background: #e8f5e9; border: 1.2px solid var(--line-green);
  padding: .28rem .85rem; border-radius: 999px;
}
.qa-typing-container {
  background: #ffffff;
  border: 1.5px solid #cbd5e1;
  border-radius: 12px;
  padding: 1.35rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.qa-typing-container:focus-within {
  border-color: var(--logo-green);
  box-shadow: 0 0 0 .25rem rgba(46, 125, 50, 0.16);
}
.qa-label {
  font-size: .95rem;
  color: var(--logo-green-dark);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.qa-textarea {
  font-size: 1rem;
  line-height: 1.65;
  min-height: 190px;
  resize: vertical;
  border: 1.5px solid #cbd5e1;
  border-radius: 9px;
  padding: .9rem 1.1rem;
  color: #1e293b;
  background: #fbfdfc;
  transition: all .2s ease;
}
.qa-textarea:focus {
  background: #ffffff;
  border-color: var(--logo-green);
  box-shadow: none;
}
.qa-textarea::placeholder {
  color: #94a3b8;
  font-style: italic;
}
.q-section-header {
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--logo-green-dark);
  margin-top: 1rem;
  margin-bottom: .45rem;
  padding-bottom: .25rem;
  border-bottom: 1.5px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.q-nav-btn.sec-qa {
  border-color: #93c5fd;
  color: #1e3a8a;
  background: #f8fafc;
}
.q-nav-btn.sec-qa:hover {
  border-color: var(--logo-green);
  background: #f0fdf4;
  color: var(--logo-green);
}
.q-nav-btn.sec-qa.answered {
  background: #dcfce7;
  border-color: #22c55e;
  color: #15803d;
}

/* ---------------- Tables ---------------- */
.table-dark-custom {
  --bs-table-bg: transparent;
  color: #1f2937;
}
.table-dark-custom thead {
  background: #f0fdf4;
}
.table-dark-custom th {
  color: var(--logo-green-dark);
  font-weight: 700;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 2px solid var(--line-green);
  padding: .85rem .75rem;
}
.table-dark-custom td {
  border-bottom: 1px solid #e2e8f0;
  vertical-align: middle;
  padding: .85rem .75rem;
  color: #334155;
}
.table-dark-custom tbody tr:hover {
  background: #f8fafc;
}
.badge-status-active {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
  padding: .3rem .75rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
}
.badge-status-paused {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
  padding: .3rem .75rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
}

/* ---------------- Modals ---------------- */
.modal-content {
  background: #ffffff !important;
  color: #1f2937 !important;
  border: 1.5px solid var(--line-green) !important;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.modal-header {
  border-bottom: 1.5px solid var(--line-green) !important;
  background: #f0fdf4;
}
.modal-header .modal-title {
  color: var(--logo-green-dark);
  font-weight: 700;
}
.modal-footer {
  border-top: 1.5px solid var(--line) !important;
  background: #f8fafc;
}
.btn-close { filter: none !important; }

/* ---------------- Admin Tab Pills ---------------- */
#dashTabs button.active-tab, #qTypeTabs button.active-tab {
  background: var(--logo-green) !important;
  color: #ffffff !important;
  border-color: var(--logo-green) !important;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(46, 125, 50, 0.22);
}

/* ---------------- Footer ---------------- */
.bt-footer {
  border-top: 1.5px solid var(--line-green);
  background: #ffffff;
  padding: 2.2rem 0;
  color: var(--text-dim);
  font-size: .88rem;
  margin-top: auto;
}
.bt-footer strong { color: var(--logo-green-dark); }

/* ---------------- Utility ---------------- */
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}
.text-logo-green { color: var(--logo-green-dark) !important; }
.min-vh-80 { min-height: 80vh; }

/* ---------------- Responsive ---------------- */
@media (max-width: 991.98px) {
  .hero { padding: 4rem 0 3rem; text-align: center; }
  .hero .cta-row { justify-content: center; }
  .hero-art { margin-top: 2.5rem; max-width: 360px; margin-inline: auto; }
}
@media (max-width: 575.98px) {
  .bt-panel .panel-body { padding: 1.3rem; }
  .q-nav-grid { grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); }
}

/* ---------------- Tab Security & Violation Modal ---------------- */
.security-status-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .32rem .8rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  transition: all .2s ease;
}
.security-status-pill.practical-allowed {
  background: #ecfdf5;
  color: #065f46;
  border: 1.5px solid #a7f3d0;
}
.security-status-pill.restricted {
  background: #f8fafc;
  color: #475569;
  border: 1.5px solid #cbd5e1;
}
.security-status-pill.warned {
  background: #fef2f2;
  color: #b91c1c;
  border: 1.5px solid #fca5a5;
  animation: pulseWarning 1.5s infinite;
}

@keyframes pulseWarning {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

/* Modal for Tab Switch Warning */
.tab-warning-overlay {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(6px);
}
.tab-warning-modal-content {
  border: 2px solid #ef4444 !important;
  box-shadow: 0 20px 45px rgba(239, 68, 68, 0.25) !important;
  border-radius: 16px !important;
}
.warning-icon-circle {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: #fee2e2;
  color: #dc2626;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 2.2rem;
  box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.15);
  animation: wobbleWarning 1s ease infinite alternate;
}
@keyframes wobbleWarning {
  0% { transform: scale(1); }
  100% { transform: scale(1.08); }
}

/* ---------------- Section C Practical Upload Area ---------------- */
.practical-dropzone {
  border: 2px dashed #16a34a;
  background: #f0fdf4;
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s ease;
}
.practical-dropzone:hover, .practical-dropzone.dragover {
  border-color: #15803d;
  background: #dcfce7;
  transform: translateY(-1px);
}
.practical-file-preview-card {
  background: #ffffff;
  border: 1.5px solid #bbf7d0;
  border-left: 5px solid #16a34a;
  border-radius: 10px;
  padding: 1rem 1.25rem;
  box-shadow: 0 4px 12px rgba(22, 163, 74, 0.08);
}
.practical-allowed-banner {
  background: #ecfdf5;
  border: 1.5px solid #a7f3d0;
  border-radius: 10px;
  padding: .75rem 1rem;
  color: #065f46;
  font-size: .88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.qa-security-banner {
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  border-radius: 8px;
  padding: .5rem .85rem;
  color: #92400e;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: .75rem;
}