:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --secondary: #ec4899;
  --accent: #8b5cf6;
  --background: #0f172a;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-hover: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: rgba(255, 255, 255, 0.1);
  --success: #10b981;
  --danger: #ef4444;
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Outfit", sans-serif;
}

body {
  background-color: var(--background);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  padding-bottom: 50px;
}

/* Background Animation */
.background-globes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: -1;
}

.globe {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.globe-1 {
  width: 400px;
  height: 400px;
  background: var(--primary);
  top: -50px;
  left: -50px;
  animation: float 10s infinite alternate;
}

.globe-2 {
  width: 500px;
  height: 500px;
  background: var(--secondary);
  bottom: -100px;
  right: -100px;
  animation: float 14s infinite alternate-reverse;
}

.globe-3 {
  width: 300px;
  height: 300px;
  background: var(--accent);
  top: 40%;
  left: 40%;
  animation: float 12s infinite alternate;
}

@keyframes float {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(30px, 30px);
  }
}

.main-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 40px;
  margin-top: 20px;
  animation: slideDown 0.8s ease-out;
}

header h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 10px;
  background: linear-gradient(to right, #fff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header .highlight {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.header-credit {
  margin-top: 10px;
  font-size: 0.95rem;
  color: var(--text-muted);
  opacity: 0.8;
}

.highlight-name {
  color: var(--secondary);
  font-weight: 600;
  font-style: italic;
}

/* Glass Panel */
.glass-panel {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--glass-shadow);
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.9rem;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  transition: color 0.2s;
}

.btn-icon:hover {
  color: var(--danger);
}

/* Controls */
.controls {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
}

/* Community Banner */
.community-banner {
  text-align: center;
  background: linear-gradient(
    135deg,
    rgba(37, 211, 102, 0.15),
    rgba(18, 140, 126, 0.15)
  );
  border: 1px solid rgba(37, 211, 102, 0.3);
  margin-bottom: 30px;
  animation: pulse-border 2s infinite;
}

.community-banner h2 {
  font-size: 1.8rem;
  margin-bottom: 8px;
  background: linear-gradient(to right, #25d366, #128c7e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.community-banner p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.btn-whatsapp-large {
  background: #25d366;
  color: white;
  font-size: 1.2rem;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-whatsapp-large:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
  background: #128c7e;
}

@keyframes pulse-border {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

/* Semester Card */
.semester-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
}

.semester-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.semester-sgpa {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  border: 1px solid rgba(16, 185, 129, 0.2);
  margin-right: 10px;
}

/* Subjects List */
.subject-header-row {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr 40px;
  gap: 15px;
  padding: 0 10px 10px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.subject-row {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr 40px;
  gap: 15px;
  align-items: center;
  margin-bottom: 12px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all 0.2s;
}

.subject-row:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.1);
}

/* Inputs */
input,
select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  color: white;
  padding: 10px 12px;
  border-radius: 6px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
}

input:focus,
select:focus {
  border-color: var(--primary);
}

.input-group {
  display: flex;
  gap: 10px;
}

.toggle-type {
  width: 90px;
}

.input-type-selector {
  padding: 10px 5px;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: none;
}

.hidden {
  display: none !important;
}

/* Overall Result */
.overall-result-card {
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 30px;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.15),
    rgba(236, 72, 153, 0.15)
  );
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.result-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.result-item .label {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.result-item .value {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(to right, #fff, #e2e8f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Reference Table */
.reference-section h3 {
  margin-bottom: 20px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: none;
}

/* Footer */
.main-footer {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-link:hover {
  color: var(--primary);
}

.footer-link.whatsapp:hover {
  color: #25d366;
}

.credits {
  font-size: 1.1rem;
  color: var(--text-main);
  font-weight: 500;
}

.heart-icon {
  color: var(--danger);
  animation: heartbeat 1.5s infinite;
}

.author-name {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

.social-icons {
  display: flex;
  gap: 20px;
  margin: 10px 0;
}

.social-icons a {
  color: var(--text-muted);
  font-size: 1.5rem;
  transition: transform 0.2s, color 0.2s;
}

.social-icons a:hover {
  transform: translateY(-3px);
}

.social-icons a:hover .fa-github {
  color: #fff;
}

.social-icons a:hover .fa-linkedin {
  color: #0a66c2;
}

.copyright {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.3);
}

@keyframes heartbeat {
  0% {
    transform: scale(1);
  }
  15% {
    transform: scale(1.3);
  }
  30% {
    transform: scale(1);
  }
  45% {
    transform: scale(1.3);
  }
  100% {
    transform: scale(1);
  }
}

/* Quick Add Toolbar */
.quick-add-toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  padding-top: 15px;
  border-top: 1px solid var(--border);
  margin-top: 10px;
}

.quick-add-count {
  width: 60px;
  text-align: center;
}

.divider-vertical {
  width: 1px;
  height: 25px;
  background: var(--border);
  margin: 0 5px;
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.slide-in {
  animation: slideRight 0.3s ease-out;
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Result Column */
.result-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.sub-value {
  font-size: 1.5rem !important;
  color: var(--secondary) !important;
  background: none !important;
  -webkit-text-fill-color: var(--secondary) !important;
}

.divider-vertical.huge {
  width: 1px;
  height: 60px;
  background: rgba(255, 255, 255, 0.2);
}

/* Disclaimer */
.disclaimer-box {
  margin-top: -10px;
  margin-bottom: 25px;
  padding: 15px;
  background: rgba(234, 179, 8, 0.1); /* Yellow/Warning tint */
  border: 1px solid rgba(234, 179, 8, 0.3);
  border-radius: 8px;
  color: #fde047;
  font-size: 0.9rem;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.disclaimer-box strong {
  color: #fff;
}

/* Fail State */
.subject-row.is-fail {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.1);
}

.subject-row.is-fail input {
  border-color: var(--danger);
}

.fail-indicator-container {
  grid-column: 1 / -1;
  text-align: right;
  height: 0;
  overflow: visible;
}

.fail-indicator {
  color: var(--danger);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  display: block;
  margin-top: -10px;
  padding-right: 50px;
}

/* Mobile Responsive */
@media (max-width: 650px) {
  .subject-header-row {
    display: none; /* Hide headers on mobile */
  }

  .subject-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 15px;
  }

  .input-group {
    width: 100%;
  }

  .overall-result-card {
    flex-direction: column;
    gap: 20px;
  }
}