/* ============================================================
   CGPA Pro Toolkit — Frontend CSS (Glassmorphism Design)
   Author: Kundariya Dharmeshkumar
   ============================================================ */

/* ── CSS Variables (design tokens) ──────────────────────── */
:root {
  --cgpa-primary:       #6366f1;
  --cgpa-secondary:     #8b5cf6;
  --cgpa-accent:        #10b981;
  --cgpa-danger:        #ef4444;
  --cgpa-warning:       #f59e0b;
  --cgpa-radius:        16px;
  --cgpa-radius-sm:     8px;
  --cgpa-radius-lg:     24px;
  --cgpa-font-base:     16px;
  --cgpa-anim:          0.4s;
  --cgpa-shadow:        0 8px 32px rgba(99,102,241,.18);
  --cgpa-glass-bg:      rgba(255,255,255,.72);
  --cgpa-glass-border:  rgba(255,255,255,.45);
  --cgpa-text:          #1e1b4b;
  --cgpa-text-muted:    #6b7280;
  --cgpa-surface:       #f8faff;
  --cgpa-input-bg:      rgba(255,255,255,.9);
  --cgpa-gradient:      linear-gradient(135deg,#667eea 0%,#764ba2 100%);
  --cgpa-gradient-card: linear-gradient(145deg,rgba(255,255,255,.8),rgba(255,255,255,.5));
}

/* ── Dark mode ───────────────────────────────────────────── */
.cgpa-dark, [data-cgpa-theme="dark"] {
  --cgpa-glass-bg:     rgba(18,18,35,.82);
  --cgpa-glass-border: rgba(255,255,255,.1);
  --cgpa-text:         #e2e8f0;
  --cgpa-text-muted:   #94a3b8;
  --cgpa-surface:      #0f0f1a;
  --cgpa-input-bg:     rgba(30,27,75,.7);
  --cgpa-gradient-card:linear-gradient(145deg,rgba(30,27,75,.8),rgba(18,18,35,.6));
}

/* ── Base wrapper ────────────────────────────────────────── */
.cgpa-pro-wrap {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: var(--cgpa-font-base);
  color: var(--cgpa-text);
  max-width: 860px;
  margin: 0 auto 2rem;
}

/* ── Glass card ──────────────────────────────────────────── */
.cgpa-card {
  background: var(--cgpa-glass-bg);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border: 1px solid var(--cgpa-glass-border);
  border-radius: var(--cgpa-radius-lg);
  box-shadow: var(--cgpa-shadow);
  overflow: hidden;
  animation: cgpa-fade-in var(--cgpa-anim) ease both;
}

.cgpa-card-header {
  background: var(--cgpa-gradient);
  padding: 1.25rem 1.75rem;
  position: relative;
  overflow: hidden;
}

.cgpa-card-header::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 220px;
  height: 220px;
  background: rgba(255,255,255,.08);
  border-radius: 50%;
}

.cgpa-heading {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.02em;
}

.cgpa-card-body {
  padding: 1.75rem;
}

.cgpa-card-footer {
  display: flex;
  gap: .75rem;
  padding: 1rem 1.75rem;
  border-top: 1px solid var(--cgpa-glass-border);
  background: rgba(255,255,255,.3);
}

/* ── Fields ──────────────────────────────────────────────── */
.cgpa-field {
  margin-bottom: 1.1rem;
}

.cgpa-field label {
  display: block;
  font-size: .83rem;
  font-weight: 600;
  color: var(--cgpa-text-muted);
  margin-bottom: .35rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.cgpa-input, .cgpa-select {
  width: 100%;
  padding: .7rem 1rem;
  background: var(--cgpa-input-bg);
  border: 1.5px solid rgba(99,102,241,.25);
  border-radius: var(--cgpa-radius-sm);
  font-size: .95rem;
  color: var(--cgpa-text);
  transition: border-color var(--cgpa-anim), box-shadow var(--cgpa-anim);
  box-sizing: border-box;
  outline: none;
  appearance: none;
}

.cgpa-input:focus, .cgpa-select:focus {
  border-color: var(--cgpa-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.18);
}

.cgpa-input-lg { font-size: 1.15rem; padding: .85rem 1.1rem; }

/* ── Grid layouts ────────────────────────────────────────── */
.cgpa-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 540px) { .cgpa-grid-2 { grid-template-columns: 1fr; } }

/* ── Subject rows ────────────────────────────────────────── */
.cgpa-subjects { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1rem; }

.cgpa-subject-row {
  background: rgba(99,102,241,.04);
  border: 1px solid rgba(99,102,241,.12);
  border-radius: var(--cgpa-radius-sm);
  padding: .6rem .8rem;
  transition: box-shadow var(--cgpa-anim);
}
.cgpa-subject-row:hover { box-shadow: 0 2px 12px rgba(99,102,241,.12); }

.cgpa-field-inline {
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-wrap: wrap;
}
.cgpa-field-inline .cgpa-input { flex: 1; min-width: 80px; }
.cgpa-label-inline {
  font-size: .88rem;
  font-weight: 600;
  color: var(--cgpa-text);
  min-width: 110px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.cgpa-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .65rem 1.35rem;
  border: none;
  border-radius: var(--cgpa-radius-sm);
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--cgpa-anim);
  text-decoration: none;
}

.cgpa-btn-primary {
  background: var(--cgpa-gradient);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99,102,241,.4);
}
.cgpa-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,.5);
}

.cgpa-btn-secondary {
  background: rgba(99,102,241,.12);
  color: var(--cgpa-primary);
  border: 1.5px solid rgba(99,102,241,.3);
}
.cgpa-btn-secondary:hover { background: rgba(99,102,241,.2); }

.cgpa-btn-ghost {
  background: transparent;
  color: var(--cgpa-text-muted);
  border: 1.5px solid rgba(0,0,0,.12);
}
.cgpa-btn-ghost:hover { background: rgba(0,0,0,.04); }

.cgpa-btn-danger {
  background: rgba(239,68,68,.12);
  color: var(--cgpa-danger);
  border: none;
  padding: .4rem .65rem;
  border-radius: 6px;
  font-size: .82rem;
}
.cgpa-btn-danger:hover { background: rgba(239,68,68,.22); }

.cgpa-actions { display: flex; gap: .65rem; flex-wrap: wrap; margin-top: .5rem; }

/* ── Result card ─────────────────────────────────────────── */
.cgpa-result-area {
  margin-top: 1.25rem;
  animation: cgpa-slide-up .35s ease both;
}

.cgpa-result-card {
  background: var(--cgpa-gradient-card);
  border: 1px solid var(--cgpa-glass-border);
  border-radius: var(--cgpa-radius);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cgpa-result-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,rgba(99,102,241,.06),rgba(139,92,246,.06));
}

.cgpa-result-number {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--cgpa-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: -.04em;
  animation: cgpa-count-in .6s ease both;
}

.cgpa-result-label {
  font-size: .9rem;
  color: var(--cgpa-text-muted);
  margin-top: .25rem;
}

/* ── Badge ───────────────────────────────────────────────── */
.cgpa-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem 1rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  margin-top: .75rem;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
}

/* ── Progress bar ────────────────────────────────────────── */
.cgpa-progress-wrap {
  margin-top: 1rem;
  background: rgba(0,0,0,.06);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
}
.cgpa-progress-bar {
  height: 100%;
  border-radius: 999px;
  background: var(--cgpa-gradient);
  transition: width 1s cubic-bezier(.4,0,.2,1);
}

/* ── Formula info ────────────────────────────────────────── */
.cgpa-formula-info {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-top: .75rem;
  padding: .5rem .8rem;
  background: rgba(99,102,241,.07);
  border-radius: var(--cgpa-radius-sm);
  font-size: .82rem;
  color: var(--cgpa-text-muted);
}
.cgpa-formula-info code {
  background: rgba(99,102,241,.12);
  padding: .1rem .4rem;
  border-radius: 4px;
  font-family: 'Fira Code', 'Cascadia Code', monospace;
}

/* ── Info box ────────────────────────────────────────────── */
.cgpa-info-box {
  background: rgba(16,185,129,.08);
  border: 1px solid rgba(16,185,129,.2);
  border-radius: var(--cgpa-radius-sm);
  padding: .65rem 1rem;
  font-size: .85rem;
  color: #065f46;
  margin-bottom: 1rem;
}

/* ── Tab system (all_calculators) ────────────────────────── */
.cgpa-all-wrap { position: relative; }

.cgpa-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  background: rgba(99,102,241,.06);
  border-radius: var(--cgpa-radius);
  padding: .5rem;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(99,102,241,.12);
}

.cgpa-tab {
  padding: .5rem 1rem;
  border: none;
  border-radius: var(--cgpa-radius-sm);
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--cgpa-text-muted);
  transition: all var(--cgpa-anim);
}
.cgpa-tab.active, .cgpa-tab:hover {
  background: var(--cgpa-gradient);
  color: #fff;
  box-shadow: 0 2px 10px rgba(99,102,241,.3);
}

.cgpa-tab-panel { animation: cgpa-fade-in .3s ease both; }

/* ── Ad slots ────────────────────────────────────────────── */
.cgpa-ad { text-align: center; margin: 1rem 0; }
.cgpa-ad-top    { margin-bottom: 1.25rem; }
.cgpa-ad-bottom { margin-top:    1.25rem; }

/* ── Dark mode toggle ────────────────────────────────────── */
.cgpa-dark-toggle {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: rgba(255,255,255,.2);
  border: none;
  border-radius: 999px;
  padding: .3rem .7rem;
  cursor: pointer;
  color: #fff;
  font-size: .85rem;
  backdrop-filter: blur(4px);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .cgpa-card-body  { padding: 1.25rem; }
  .cgpa-card-footer{ flex-wrap: wrap; }
  .cgpa-actions    { flex-direction: column; }
  .cgpa-btn        { justify-content: center; }
  .cgpa-result-number { font-size: 2.6rem; }
  .cgpa-tabs       { gap: .3rem; }
  .cgpa-tab        { padding: .4rem .7rem; font-size: .8rem; }
}

/* ── Print ───────────────────────────────────────────────── */
@media print {
  .cgpa-actions, .cgpa-tabs, .cgpa-ad, .cgpa-dark-toggle,
  .cgpa-card-footer { display: none !important; }
  .cgpa-card {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
  }
  .cgpa-result-number {
    -webkit-text-fill-color: #1e1b4b !important;
    color: #1e1b4b !important;
  }
}

/* ── Keyframes ───────────────────────────────────────────── */
@keyframes cgpa-fade-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes cgpa-slide-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes cgpa-count-in {
  from { opacity: 0; transform: scale(.8); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes cgpa-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99,102,241,.4); }
  50%       { box-shadow: 0 0 0 8px rgba(99,102,241,0); }
}

/* ── Extended modern design engine ───────────────────────── */
.cgpa-pro-wrap {
  position: relative;
  isolation: isolate;
  max-width: var(--cgpa-max-width, 860px);
  background: radial-gradient(circle at top left, rgba(255,255,255,.55), transparent 28%), var(--cgpa-bg-tint, transparent);
  border-radius: calc(var(--cgpa-radius-lg) + 8px);
  padding: .15rem;
}

.cgpa-bg-orb,
.cgpa-bg-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.cgpa-bg-orb {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(22px);
  opacity: .35;
}

.cgpa-bg-orb-a {
  left: -24px;
  top: -16px;
  background: color-mix(in srgb, var(--cgpa-primary) 74%, white 26%);
}

.cgpa-bg-orb-b {
  right: -24px;
  bottom: -18px;
  background: color-mix(in srgb, var(--cgpa-accent) 66%, white 34%);
}

.cgpa-bg-grid {
  background-image: linear-gradient(rgba(255,255,255,.14) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.45), transparent 85%);
  opacity: .35;
}

.cgpa-no-fx .cgpa-bg-orb,
.cgpa-no-fx .cgpa-bg-grid { display: none; }

.cgpa-card {
  border-width: var(--cgpa-border-width, 1px);
  backdrop-filter: blur(var(--cgpa-blur, 14px)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--cgpa-blur, 14px)) saturate(180%);
}

.cgpa-card-body {
  padding: var(--cgpa-card-padding, 1.75rem);
}

.cgpa-heading {
  font-size: var(--cgpa-heading-size, 1.35rem);
}

.cgpa-header-kicker {
  display: inline-flex;
  margin-bottom: .55rem;
  padding: .25rem .65rem;
  border-radius: 999px;
  background: rgba(255,255,255,.14);
  color: rgba(255,255,255,.92);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 700;
}

.cgpa-btn {
  border-radius: var(--cgpa-button-radius, 12px);
}

.cgpa-theme-aurora .cgpa-card-header {
  box-shadow: inset 0 1px 0 rgba(255,255,255,.22);
}

.cgpa-theme-aurora .cgpa-result-card::before {
  background: linear-gradient(135deg, rgba(255,255,255,.3), rgba(255,255,255,.08));
}

.cgpa-theme-neo {
  --cgpa-text: #0f172a;
  --cgpa-text-muted: #475569;
}

.cgpa-theme-neo .cgpa-card {
  background: rgba(255,255,255,.92);
  border-color: rgba(15,23,42,.08);
}

.cgpa-theme-neo .cgpa-card-header {
  background: linear-gradient(135deg, rgba(15,23,42,.98), rgba(30,41,59,.92));
}

.cgpa-theme-neo .cgpa-btn-primary {
  box-shadow: 0 10px 22px rgba(15,23,42,.18);
}

.cgpa-theme-minimal .cgpa-pro-wrap {
  background: transparent;
}

.cgpa-theme-minimal .cgpa-card {
  background: rgba(255,255,255,.97);
  border-color: rgba(15,23,42,.08);
}

.cgpa-theme-minimal .cgpa-card-header {
  background: linear-gradient(135deg, #111827, #374151);
}

.cgpa-layout-grid .cgpa-card-body {
  display: grid;
  gap: 1.1rem;
}

.cgpa-layout-stacked .cgpa-card {
  box-shadow: 0 8px 18px rgba(15,23,42,.08);
}

.cgpa-header-split .cgpa-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cgpa-header-clean .cgpa-card-header::before {
  display: none;
}

.cgpa-btn-style-soft .cgpa-btn {
  box-shadow: none;
  border-radius: 999px;
}

.cgpa-btn-style-sharp .cgpa-btn {
  border-radius: 8px;
}

.cgpa-btn-style-sharp .cgpa-btn-primary {
  box-shadow: none;
}

.cgpa-card-footer {
  background: linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,.34));
}

.cgpa-dark .cgpa-card-footer {
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.05));
}

.cgpa-dark .cgpa-bg-grid {
  opacity: .15;
}

.cgpa-dark .cgpa-theme-neo .cgpa-card,
.cgpa-dark.cgpa-theme-neo .cgpa-card {
  background: rgba(15,23,42,.84);
}