/* ==========================================================================
   Excel Results Module — Premium Modern Design System
   Standalone SPA & Cloudflare Pages Tab
   ========================================================================== */

#excelResultsRoot {
  --er-bg: #faf8f3;
  --er-surface: #ffffff;
  --er-surface-2: #f4f0e8;
  --er-surface-card: rgba(255, 255, 255, 0.95);
  --er-text: #1e293b;
  --er-text-secondary: #475569;
  --er-muted: #64748b;
  --er-line: rgba(36, 52, 71, 0.12);
  --er-line-light: rgba(36, 52, 71, 0.06);
  --er-primary: #1a4d2e;
  --er-primary-hover: #133a23;
  --er-gold: #d4af37;
  --er-gold-glow: rgba(212, 175, 55, 0.35);

  /* Visual Category Palettes */
  --er-results: #4f46e5;
  --er-results-2: #7c3aed;
  --er-results-glow: rgba(99, 102, 241, 0.22);
  --er-results-bg: rgba(79, 70, 229, 0.08);

  --er-papers: #059669;
  --er-papers-2: #10b981;
  --er-papers-alt: #f59e0b;
  --er-papers-alt-2: #ea580c;
  --er-papers-glow: rgba(16, 185, 129, 0.22);
  --er-papers-bg: rgba(16, 185, 129, 0.08);

  --er-admin: #1e293b;
  --er-admin-2: #0f172a;
  --er-admin-glow: rgba(30, 41, 59, 0.25);

  /* Format Badges */
  --er-fmt-pdf: #ef4444;
  --er-fmt-pdf-bg: rgba(239, 68, 68, 0.10);
  --er-fmt-html: #f97316;
  --er-fmt-html-bg: rgba(249, 115, 22, 0.10);
  --er-fmt-docx: #2563eb;
  --er-fmt-docx-bg: rgba(37, 99, 235, 0.10);
  --er-fmt-img: #06b6d4;
  --er-fmt-img-bg: rgba(6, 182, 212, 0.10);
  --er-fmt-txt: #64748b;
  --er-fmt-txt-bg: rgba(100, 116, 139, 0.10);

  /* Shadows & Elevation */
  --er-shadow-sm: 0 4px 12px rgba(26, 77, 46, 0.05);
  --er-shadow-md: 0 10px 25px rgba(26, 77, 46, 0.08);
  --er-shadow-lg: 0 20px 40px rgba(26, 77, 46, 0.12);
  --er-radius-sm: 10px;
  --er-radius-md: 16px;
  --er-radius-lg: 24px;
  --er-radius-full: 9999px;

  font-family: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--er-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   AMOLED Dark Theme
   ========================================================================== */
body.dark #excelResultsRoot,
body.er-lan.dark #excelResultsRoot {
  --er-bg: #000000;
  --er-surface: #0a0e17;
  --er-surface-2: #111827;
  --er-surface-card: rgba(15, 23, 42, 0.85);
  --er-text: #f1f5f9;
  --er-text-secondary: #cbd5e1;
  --er-muted: #94a3b8;
  --er-line: rgba(255, 255, 255, 0.12);
  --er-line-light: rgba(255, 255, 255, 0.06);
  --er-primary: #22c55e;
  --er-primary-hover: #16a34a;
  --er-gold: #fbbf24;
  --er-gold-glow: rgba(251, 191, 36, 0.40);

  --er-results: #818cf8;
  --er-results-2: #a855f7;
  --er-results-glow: rgba(129, 140, 248, 0.35);
  --er-results-bg: rgba(129, 140, 248, 0.15);

  --er-papers: #34d399;
  --er-papers-2: #10b981;
  --er-papers-alt: #fbbf24;
  --er-papers-alt-2: #f97316;
  --er-papers-glow: rgba(52, 211, 153, 0.35);
  --er-papers-bg: rgba(52, 211, 153, 0.15);

  --er-admin: #38bdf8;
  --er-admin-2: #1e293b;
  --er-admin-glow: rgba(56, 189, 248, 0.35);

  --er-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.40);
  --er-shadow-md: 0 10px 30px rgba(0, 0, 0, 0.55);
  --er-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.70);
}

body.er-lan {
  margin: 0;
  background: #faf8f3;
  min-height: 100vh;
}
body.er-lan.dark {
  background: #000000;
}

/* ==========================================================================
   Wrapper & Hero Banner
   ========================================================================== */
.er-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 14px 40px;
}

.er-hero {
  position: relative;
  border-radius: var(--er-radius-lg);
  padding: 32px 28px 26px;
  color: #ffffff;
  background: linear-gradient(135deg, #1a4d2e 0%, #0d2818 55%, #163d24 100%);
  box-shadow: var(--er-shadow-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  margin-bottom: 20px;
}

body.dark .er-hero {
  background: linear-gradient(135deg, #071c10 0%, #020804 55%, #0d2818 100%);
  border-color: rgba(34, 197, 94, 0.25);
  box-shadow: 0 0 40px rgba(34, 197, 94, 0.10);
}

.er-hero::before {
  content: '';
  position: absolute;
  inset: -30%;
  background:
    radial-gradient(circle at 15% 40%, rgba(247, 147, 30, 0.20) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(212, 175, 55, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 50% 10%, rgba(255, 255, 255, 0.10) 0%, transparent 50%);
  pointer-events: none;
  animation: erHeroSheen 10s ease-in-out infinite alternate;
}

@keyframes erHeroSheen {
  from { transform: scale(1) translate(0, 0); opacity: 0.8; }
  to { transform: scale(1.04) translate(15px, -10px); opacity: 1; }
}

.er-hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.er-hero-title-group h1 {
  margin: 0 0 6px;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  font-family: "Lora", Georgia, serif;
  display: flex;
  align-items: center;
  gap: 10px;
}

.er-hero-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 10px;
  border-radius: var(--er-radius-full);
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.25);
  vertical-align: middle;
  font-family: "Poppins", sans-serif;
}

.er-hero p {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  max-width: 680px;
  font-size: 0.95rem;
  line-height: 1.6;
}

.er-hero-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.er-hero-stat-pill {
  background: rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--er-radius-md);
  padding: 8px 14px;
  text-align: center;
  min-width: 80px;
}

.er-hero-stat-pill strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--er-gold);
}

.er-hero-stat-pill span {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.75);
}

/* ==========================================================================
   Breadcrumbs & Navigation Bar
   ========================================================================== */
.er-crumbs-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 14px 0 20px;
  flex-wrap: wrap;
}

.er-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.90rem;
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  padding: 8px 14px;
  border-radius: var(--er-radius-full);
  box-shadow: var(--er-shadow-sm);
}

body.dark .er-crumbs {
  background: var(--er-surface-2);
}

.er-crumbs a,
.er-crumbs button {
  background: none;
  border: 0;
  color: var(--er-primary);
  font-weight: 600;
  cursor: pointer;
  font: inherit;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 6px;
  border-radius: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}

.er-crumbs a:hover,
.er-crumbs button:hover {
  background: rgba(26, 77, 46, 0.08);
}

body.dark .er-crumbs a,
body.dark .er-crumbs button {
  color: var(--er-primary);
}

body.dark .er-crumbs a:hover,
body.dark .er-crumbs button:hover {
  background: rgba(34, 197, 94, 0.15);
}

.er-crumbs span.current {
  color: var(--er-text-secondary);
  font-weight: 600;
  padding: 2px 6px;
}

.er-crumbs .sep {
  color: var(--er-muted);
  font-size: 0.75rem;
}

.er-nav-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--er-surface);
  color: var(--er-text);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-full);
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--er-shadow-sm);
  transition: all 0.2s ease;
}

body.dark .er-nav-back-btn {
  background: var(--er-surface-2);
}

.er-nav-back-btn:hover {
  border-color: var(--er-primary);
  color: var(--er-primary);
  transform: translateX(-3px);
}

/* ==========================================================================
   Landing Cards & Big Feature Tiles
   ========================================================================== */
.er-landing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 10px;
}

.er-landing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  text-align: left;
  background: var(--er-surface-card);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-lg);
  padding: 28px 24px;
  box-shadow: var(--er-shadow-md);
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease;
}

.er-landing-card:hover,
.er-landing-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--er-shadow-lg);
  border-color: var(--card-border-hover, var(--er-primary));
  outline: none;
}

/* Results Landing Card Style */
.er-landing-card.results {
  --card-border-hover: var(--er-results);
  border-top: 6px solid var(--er-results);
}
.er-landing-card.results::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 140px; height: 140px;
  background: radial-gradient(circle, var(--er-results-glow) 0%, transparent 70%);
  pointer-events: none;
}

/* Papers Landing Card Style */
.er-landing-card.papers {
  --card-border-hover: var(--er-papers);
  border-top: 6px solid var(--er-papers);
}
.er-landing-card.papers::before {
  content: '';
  position: absolute;
  top: 0; right: 0; width: 140px; height: 140px;
  background: radial-gradient(circle, var(--er-papers-glow) 0%, transparent 70%);
  pointer-events: none;
}

/* Admin Landing Card Style */
.er-landing-card.admin {
  --card-border-hover: var(--er-admin);
  border-top: 6px solid var(--er-admin);
}

.er-card-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  color: #ffffff;
  margin-bottom: 18px;
  box-shadow: var(--er-shadow-sm);
  transition: transform 0.2s ease;
}

.er-landing-card:hover .er-card-icon-wrap {
  transform: scale(1.08);
}

.er-landing-card.results .er-card-icon-wrap {
  background: linear-gradient(135deg, var(--er-results) 0%, var(--er-results-2) 100%);
}

.er-landing-card.papers .er-card-icon-wrap {
  background: linear-gradient(135deg, var(--er-papers) 0%, var(--er-papers-2) 100%);
}

.er-landing-card.admin .er-card-icon-wrap {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.er-landing-card h2 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--er-text);
  font-family: "Poppins", sans-serif;
}

.er-landing-card p {
  margin: 0 0 20px;
  color: var(--er-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  flex: 1;
}

.er-card-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--er-radius-full);
  width: fit-content;
  transition: all 0.2s ease;
}

.er-landing-card.results .er-card-cta-btn {
  background: var(--er-results-bg);
  color: var(--er-results);
}
.er-landing-card.results:hover .er-card-cta-btn {
  background: var(--er-results);
  color: #ffffff;
}

.er-landing-card.papers .er-card-cta-btn {
  background: var(--er-papers-bg);
  color: var(--er-papers);
}
.er-landing-card.papers:hover .er-card-cta-btn {
  background: var(--er-papers);
  color: #ffffff;
}

.er-landing-card.admin .er-card-cta-btn {
  background: rgba(30, 41, 59, 0.10);
  color: var(--er-admin);
}
.er-landing-card.admin:hover .er-card-cta-btn {
  background: var(--er-admin);
  color: #ffffff;
}

/* ==========================================================================
   Toolbars, Filters & Search Inputs
   ========================================================================== */
.er-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin: 16px 0 22px;
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  padding: 12px 16px;
  border-radius: var(--er-radius-md);
  box-shadow: var(--er-shadow-sm);
}

body.dark .er-toolbar {
  background: var(--er-surface-2);
}

.er-search-box {
  position: relative;
  flex: 1;
  min-width: 220px;
}

.er-search-box i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--er-muted);
  font-size: 0.95rem;
  pointer-events: none;
}

.er-search-box input {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 14px 10px 38px;
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-full);
  background: var(--er-bg);
  color: var(--er-text);
  font: inherit;
  font-size: 0.92rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

body.dark .er-search-box input {
  background: #090e17;
}

.er-search-box input:focus {
  border-color: var(--er-primary);
  box-shadow: 0 0 0 3px rgba(26, 77, 46, 0.12);
  outline: none;
}

.er-toolbar select {
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-full);
  padding: 9px 16px;
  background: var(--er-bg);
  color: var(--er-text);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s;
}

body.dark .er-toolbar select {
  background: #090e17;
}

.er-toolbar select:focus {
  border-color: var(--er-primary);
  outline: none;
}

.er-view-toggle {
  display: flex;
  background: var(--er-bg);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-full);
  padding: 3px;
  gap: 2px;
}

body.dark .er-view-toggle {
  background: #090e17;
}

.er-view-toggle-btn {
  border: 0;
  background: transparent;
  color: var(--er-muted);
  padding: 6px 12px;
  border-radius: var(--er-radius-full);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.er-view-toggle-btn.active {
  background: var(--er-surface);
  color: var(--er-primary);
  box-shadow: var(--er-shadow-sm);
}

body.dark .er-view-toggle-btn.active {
  background: var(--er-surface-2);
  color: var(--er-primary);
}

/* ==========================================================================
   Hierarchy Cards Grid (Group, Class, Subject)
   ========================================================================== */
.er-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.er-item-card {
  position: relative;
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 22px 20px;
  box-shadow: var(--er-shadow-sm);
  cursor: pointer;
  text-align: left;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

body.dark .er-item-card {
  background: var(--er-surface-2);
}

.er-item-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--er-shadow-md);
  border-color: var(--er-papers);
}

.er-item-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.er-item-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  color: #ffffff;
  background: linear-gradient(135deg, var(--er-papers) 0%, var(--er-papers-2) 100%);
  flex-shrink: 0;
}

.er-item-title-wrap h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--er-text);
}

.er-item-card p {
  margin: 0 0 16px;
  color: var(--er-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  flex: 1;
}

.er-item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--er-line-light);
  padding-top: 12px;
}

.er-badge-count {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--er-radius-full);
  background: var(--er-papers-bg);
  color: var(--er-papers);
}

.er-card-arrow {
  color: var(--er-muted);
  font-size: 0.88rem;
  transition: transform 0.2s ease, color 0.2s ease;
}

.er-item-card:hover .er-card-arrow {
  color: var(--er-papers);
  transform: translateX(4px);
}

/* ==========================================================================
   Practice Question Papers List & Cards
   ========================================================================== */
.er-paper-list {
  display: grid;
  gap: 14px;
}

.er-paper-card {
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 20px 22px;
  box-shadow: var(--er-shadow-sm);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

body.dark .er-paper-card {
  background: var(--er-surface-2);
}

.er-paper-card:hover {
  border-color: var(--er-papers);
  box-shadow: var(--er-shadow-md);
  transform: translateY(-2px);
}

.er-paper-main {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex: 1;
  min-width: 260px;
}

.er-format-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  font-weight: 800;
  flex-shrink: 0;
  color: #ffffff;
}

.er-format-icon.pdf { background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%); }
.er-format-icon.html, .er-format-icon.htm { background: linear-gradient(135deg, #f97316 0%, #c2410c 100%); }
.er-format-icon.docx, .er-format-icon.doc { background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%); }
.er-format-icon.svg, .er-format-icon.png, .er-format-icon.jpg { background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%); }
.er-format-icon.txt { background: linear-gradient(135deg, #64748b 0%, #475569 100%); }

.er-paper-info h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--er-text);
}

.er-paper-info p {
  margin: 0 0 10px;
  color: var(--er-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.er-paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.er-tag-chip {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--er-radius-full);
  background: var(--er-bg);
  border: 1px solid var(--er-line);
  color: var(--er-muted);
}

.er-paper-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.er-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 0;
  border-radius: var(--er-radius-full);
  padding: 9px 16px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  background: var(--er-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(26, 77, 46, 0.20);
  transition: all 0.2s ease;
}

.er-btn:hover {
  background: var(--er-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 77, 46, 0.30);
}

.er-btn.secondary {
  background: var(--er-papers);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.20);
}
.er-btn.secondary:hover {
  background: #047857;
}

.er-btn.results-btn {
  background: var(--er-results);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.20);
}
.er-btn.results-btn:hover {
  background: #4338ca;
}

.er-btn.ghost {
  background: var(--er-surface);
  color: var(--er-text);
  border: 1px solid var(--er-line);
  box-shadow: none;
}
.er-btn.ghost:hover {
  background: var(--er-bg);
  border-color: var(--er-primary);
  color: var(--er-primary);
}

body.dark .er-btn.ghost {
  background: var(--er-surface-2);
}

.er-btn.danger {
  background: #dc2626;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.20);
}
.er-btn.danger:hover {
  background: #b91c1c;
}

/* ==========================================================================
   In-Page Paper Preview Modal & Drawer
   ========================================================================== */
.er-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: 16px;
  animation: erFadeIn 0.2s ease;
}

.er-modal-preview-card {
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-lg);
  box-shadow: var(--er-shadow-lg);
  width: 100%;
  max-width: 960px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: erSlideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

body.dark .er-modal-preview-card {
  background: var(--er-surface-2);
}

.er-preview-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--er-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--er-bg);
}

body.dark .er-preview-header {
  background: #0a0e17;
}

.er-preview-title-group h3 {
  margin: 0 0 4px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--er-text);
}

.er-preview-title-group p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--er-muted);
}

.er-preview-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.er-preview-close-btn {
  background: transparent;
  border: 1px solid var(--er-line);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--er-muted);
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.15s ease;
}

.er-preview-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: transparent;
}

.er-preview-viewport {
  flex: 1;
  min-height: 480px;
  max-height: 70vh;
  background: #ffffff;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

body.dark .er-preview-viewport {
  background: #05080f;
}

.er-preview-viewport iframe,
.er-preview-viewport embed {
  width: 100%;
  height: 100%;
  min-height: 480px;
  border: 0;
}

.er-preview-viewport img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  padding: 16px;
}

.er-preview-fallback {
  text-align: center;
  padding: 40px 20px;
  max-width: 440px;
}

.er-preview-fallback-icon {
  font-size: 3.5rem;
  color: var(--er-results);
  margin-bottom: 16px;
}

/* ==========================================================================
   Results Table & Card View
   ========================================================================== */
.er-results-summary-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding: 12px 18px;
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  box-shadow: var(--er-shadow-sm);
}

body.dark .er-results-summary-bar {
  background: var(--er-surface-2);
}

.er-summary-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.er-metric-tag {
  font-size: 0.85rem;
  color: var(--er-muted);
}
.er-metric-tag strong {
  color: var(--er-results);
  font-weight: 700;
}

/* Results Table */
.er-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  background: var(--er-surface);
  box-shadow: var(--er-shadow-sm);
}

body.dark .er-table-wrap {
  background: var(--er-surface-2);
}

.er-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.er-table th,
.er-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--er-line-light);
  font-size: 0.90rem;
}

.er-table th {
  background: var(--er-bg);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--er-muted);
  border-bottom: 1px solid var(--er-line);
}

body.dark .er-table th {
  background: #090e17;
}

.er-table tbody tr {
  transition: background 0.15s ease;
}

.er-table tbody tr:hover {
  background: rgba(79, 70, 229, 0.04);
}

body.dark .er-table tbody tr:hover {
  background: rgba(129, 140, 248, 0.08);
}

/* Grade Pills */
.er-grade-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--er-radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
}

.er-grade-pill.A-plus, .er-grade-pill.A {
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.30);
}
body.dark .er-grade-pill.A-plus, body.dark .er-grade-pill.A {
  background: rgba(52, 211, 153, 0.20);
  color: #34d399;
}

.er-grade-pill.B-plus, .er-grade-pill.B {
  background: rgba(59, 130, 246, 0.15);
  color: #2563eb;
  border: 1px solid rgba(59, 130, 246, 0.30);
}
body.dark .er-grade-pill.B-plus, body.dark .er-grade-pill.B {
  background: rgba(96, 165, 250, 0.20);
  color: #60a5fa;
}

.er-grade-pill.C {
  background: rgba(245, 158, 11, 0.15);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.30);
}

.er-grade-pill.F, .er-grade-pill.D {
  background: rgba(239, 68, 68, 0.15);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.30);
}

/* Results Card View (Grid) */
.er-results-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.er-student-result-card {
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 18px 20px;
  box-shadow: var(--er-shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s, box-shadow 0.2s;
}

body.dark .er-student-result-card {
  background: var(--er-surface-2);
}

.er-student-result-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--er-shadow-md);
  border-color: var(--er-results);
}

.er-student-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.er-student-card-title h4 {
  margin: 0 0 2px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--er-text);
}

.er-student-roll-chip {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--er-muted);
}

.er-student-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.80rem;
}

.er-marks-progress-wrap {
  margin-top: 4px;
}

.er-marks-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.er-progress-track {
  height: 8px;
  border-radius: 4px;
  background: var(--er-bg);
  overflow: hidden;
  border: 1px solid var(--er-line-light);
}

body.dark .er-progress-track {
  background: #090e17;
}

.er-progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--er-results), var(--er-results-2));
  transition: width 0.4s ease;
}

/* ==========================================================================
   Admin Dashboard Layout
   ========================================================================== */
.er-admin-shell {
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-lg);
  box-shadow: var(--er-shadow-md);
  overflow: hidden;
}

body.dark .er-admin-shell {
  background: var(--er-surface-2);
}

.er-admin-topbar {
  padding: 16px 22px;
  background: var(--er-bg);
  border-bottom: 1px solid var(--er-line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

body.dark .er-admin-topbar {
  background: #090e17;
}

.er-admin-nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.er-admin-tab-btn {
  border: 0;
  background: transparent;
  color: var(--er-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--er-radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.er-admin-tab-btn:hover {
  background: rgba(30, 41, 59, 0.08);
  color: var(--er-text);
}

.er-admin-tab-btn.active {
  background: var(--er-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(26, 77, 46, 0.25);
}

body.dark .er-admin-tab-btn.active {
  background: var(--er-primary);
  color: #000000;
}

.er-admin-body {
  padding: 24px;
}

.er-form-card {
  background: var(--er-surface);
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

body.dark .er-form-card {
  background: #0d131f;
}

.er-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.er-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.er-field label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--er-muted);
}

.er-field input,
.er-field select,
.er-field textarea {
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-sm);
  padding: 9px 12px;
  background: var(--er-bg);
  color: var(--er-text);
  font: inherit;
  font-size: 0.90rem;
}

body.dark .er-field input,
body.dark .er-field select,
body.dark .er-field textarea {
  background: #090e17;
}

.er-field input:focus,
.er-field select:focus,
.er-field textarea:focus {
  border-color: var(--er-primary);
  outline: none;
}

.er-tree-node {
  border: 1px solid var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 12px 16px;
  margin-bottom: 10px;
  background: var(--er-surface);
}

body.dark .er-tree-node {
  background: #0d131f;
}

.er-upload-dropzone {
  border: 2px dashed var(--er-line);
  border-radius: var(--er-radius-md);
  padding: 30px 20px;
  text-align: center;
  background: var(--er-bg);
  cursor: pointer;
  transition: all 0.2s ease;
}

body.dark .er-upload-dropzone {
  background: #090e17;
}

.er-upload-dropzone:hover {
  border-color: var(--er-primary);
  background: rgba(26, 77, 46, 0.04);
}

/* ==========================================================================
   Toasts, Skeletons & Empty States
   ========================================================================== */
.er-toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 120;
  padding: 14px 20px;
  background: #0f172a;
  color: #ffffff;
  font-size: 0.90rem;
  font-weight: 600;
  border-radius: var(--er-radius-md);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
  animation: erSlideUp 0.25s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.er-empty-box {
  padding: 48px 24px;
  text-align: center;
  border-radius: var(--er-radius-lg);
  border: 1px dashed var(--er-line);
  background: var(--er-surface);
  color: var(--er-muted);
}

body.dark .er-empty-box {
  background: var(--er-surface-2);
}

.er-empty-icon {
  font-size: 3rem;
  color: var(--er-muted);
  opacity: 0.6;
  margin-bottom: 14px;
}

.er-skel {
  height: 100px;
  border-radius: var(--er-radius-md);
  background: linear-gradient(90deg, #ece7dc, #f7f4ee, #ece7dc);
  background-size: 200% 100%;
  animation: erShimmer 1.4s infinite;
  margin-bottom: 12px;
}

body.dark .er-skel {
  background: linear-gradient(90deg, #111827, #1f2937, #111827);
  background-size: 200% 100%;
}

@keyframes erShimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

@keyframes erFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes erSlideUp {
  from { transform: translateY(16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 768px) {
  .er-hero { padding: 22px 18px; }
  .er-hero-title-group h1 { font-size: 1.6rem; }
  .er-landing-grid { grid-template-columns: 1fr; }
  .er-toolbar { flex-direction: column; align-items: stretch; }
  .er-search-box { width: 100%; min-width: unset; }
  .er-preview-header { flex-direction: column; align-items: flex-start; }
  .er-preview-actions { width: 100%; justify-content: flex-end; }
  .er-paper-card { flex-direction: column; align-items: stretch; }
  .er-paper-actions { width: 100%; justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  .er-hero::before { animation: none; }
  .er-skel { animation: none; }
  .er-landing-card { transition: none; }
}