:root {
  --bg-dark: #121212;
  --container-dark: #1e1e1e;
  --text-dark: #ffffff;
  --accent-dark: #1976d2;
  --bg-light: #f0f2f5;
  --container-light: #ffffff;
  --text-light: #000000;
  --accent-light: #007acc;
  --transition-speed: 0.3s;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Roboto', sans-serif;
  background: var(--bg-dark);
  color: var(--text-dark);
  transition: background var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
}
.light-theme body {
  background: var(--bg-light);
  color: var(--text-light);
}
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: -1;
  top: 0;
  left: 0;
  opacity: 0.5;
}
.main-layout {
  display: grid;
  grid-template-columns: 300px auto 600px;
  gap: 20px;
  padding: 20px;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  flex: 1;
}
.sidebar-left {
  background: var(--container-dark);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(255,255,255,0.1);
  transition: background var(--transition-speed), box-shadow var(--transition-speed);
  align-self: start;
}
.light-theme .sidebar-left {
  background: var(--container-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.center-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-column {
  background: var(--container-dark);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(255,255,255,0.1);
  transition: background var(--transition-speed), box-shadow var(--transition-speed);
  align-self: start;
}
.light-theme .news-column {
  background: var(--container-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.sidebar-left h3,
.news-column h3 {
  font-size: 20px;
  margin-bottom: 10px;
  border-bottom: 1px solid currentColor;
  padding-bottom: 5px;
}
.sidebar-left h4 {
  font-size: 16px;
  margin-top: 20px;
  margin-bottom: 8px;
}
.calculator-container {
  background: var(--container-dark);
  box-shadow: 0 4px 12px rgba(255,255,255,0.1);
  padding: 30px;
  border-radius: 10px;
  width: 100%;
  transition: background var(--transition-speed), box-shadow var(--transition-speed);
}
.light-theme .calculator-container {
  background: var(--container-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.history-container {
  background: var(--container-dark);
  padding: 20px;
  border-radius: 10px;
  width: 100%;
  box-shadow: 0 4px 12px rgba(255,255,255,0.05);
  transition: background var(--transition-speed), color var(--transition-speed), box-shadow var(--transition-speed);
}
.light-theme .history-container {
  background: var(--container-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.header h1 {
  font-size: 24px;
}
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  outline: none;
  transition: transform var(--transition-speed);
}
.theme-toggle:hover {
  transform: scale(1.1);
}
.theme-icon {
  width: 24px;
  height: 24px;
  fill: currentColor;
}
label {
  margin: 10px 0 5px;
  font-weight: 500;
}
input[type="number"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 4px;
  border: 1px solid #ccc;
  font-size: 14px;
  transition: border-color var(--transition-speed);
}
input[type="number"]:focus {
  border-color: var(--accent-dark);
  outline: none;
}
.light-theme input[type="number"]:focus {
  border-color: var(--accent-light);
}
.calc-btn {
  margin-top: 15px;
  padding: 10px;
  width: 100%;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  background: var(--accent-dark);
  transition: background var(--transition-speed);
}
.calc-btn:hover {
  background: #1558a3;
}
.light-theme .calc-btn {
  background: var(--accent-light);
}
.light-theme .calc-btn:hover {
  background: #005fa3;
}
.ergebnis {
  margin-top: 15px;
  font-weight: bold;
  white-space: pre-wrap;
  padding: 10px;
  border-radius: 4px;
  background: #2b2b2b;
  transition: background var(--transition-speed);
}
.light-theme .ergebnis {
  background: #f8f8f8;
  color: #000;
}
.history-container h2 {
  font-size: 20px;
  margin-bottom: 10px;
  text-align: center;
  border-bottom: 1px solid currentColor;
  padding-bottom: 5px;
}
#historyList {
  max-height: 300px;
  overflow-y: auto;
  overflow-x: hidden;
  margin-bottom: 10px;
}
.history-entry {
  font-size: 14px;
  margin: 10px 0;
  padding: 8px;
  background: rgba(0,0,0,0.1);
  border-radius: 4px;
  transition: background var(--transition-speed);
}
.light-theme .history-entry {
  background: rgba(0,0,0,0.05);
}
.history-entry:hover {
  background: rgba(0,0,0,0.2);
}
.light-theme .history-entry:hover {
  background: rgba(0,0,0,0.1);
}
.history-entry-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.history-entry-content hr {
  margin: 8px 0;
  border: none;
  border-top: 1px solid currentColor;
}
.timestamp {
  font-size: 12px;
  opacity: 0.8;
  margin-top: 4px;
}
.clear-btn {
  width: 100%;
  background: #e53935;
  border: none;
  border-radius: 4px;
  padding: 10px;
  color: #fff;
  cursor: pointer;
  font-size: 16px;
  transition: background var(--transition-speed);
}
.clear-btn:hover {
  background: #c62828;
}
.light-theme .clear-btn {
  background: #ff5c5c;
}
.light-theme .clear-btn:hover {
  background: #e53935;
}
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--container-dark);
  color: var(--text-dark);
  padding: 15px;
  display: flex;
  justify-content: center;
  gap: 10px;
  align-items: center;
  z-index: 9999;
  transition: background var(--transition-speed), color var(--transition-speed);
}
.light-theme .cookie-banner {
  background: var(--container-light);
  color: var(--text-light);
  box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
}
.cookie-banner button {
  background: var(--accent-dark);
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: background var(--transition-speed);
}
.light-theme .cookie-banner button {
  background: var(--accent-light);
}
.cookie-banner button:hover {
  filter: brightness(0.9);
}
.hidden {
  display: none;
}
#tipOfDay {
  margin-top: 10px;
  text-align: center;
}
.tip-container {
  display: inline-block;
  font-size: 16px;
  padding: 15px;
  border-radius: 8px;
  border: 2px solid var(--accent-dark);
  line-height: 1.4;
  text-align: center;
}
.light-theme .tip-container {
  border: 2px solid var(--accent-light);
}
.user-tip-form {
  margin: 15px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.user-tip-form input[type="text"] {
  padding: 8px;
  border-radius: 4px;
  border: 1px solid #ccc;
  outline: none;
}
.user-tip-form button {
  padding: 8px;
  border-radius: 4px;
  background: var(--accent-dark);
  color: #fff;
  border: none;
  cursor: pointer;
  transition: background var(--transition-speed);
}
.user-tip-form button:hover {
  filter: brightness(0.9);
}
.light-theme .user-tip-form button {
  background: var(--accent-light);
}
.user-tip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  margin-top: 5px;
}
.delete-tip-btn {
  margin-left: 10px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: currentColor;
  transition: transform var(--transition-speed);
}
.delete-tip-btn:hover {
  transform: scale(1.1);
}
.schnitt-container {
  margin-top: 20px;
  border: 2px solid var(--accent-dark);
  border-radius: 8px;
  padding: 15px;
  text-align: center;
}
.schnitt-container h4 {
  margin-bottom: 10px;
  font-size: 16px;
}
.schnitt-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.grades-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  margin-top: 5px;
}
.schnitt-result {
  margin-top: 10px;
  font-size: 16px;
  font-weight: bold;
  animation: fadeIn 1s;
}
@keyframes fadeIn {
  from { opacity: 0.5; }
  to { opacity: 1; }
}
.info-container {
  margin-top: 20px;
  text-align: center;
}
.info-toggle {
  background: var(--accent-dark);
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background var(--transition-speed);
  margin-bottom: 10px;
}
.info-toggle:hover {
  filter: brightness(0.9);
}
.light-theme .info-toggle {
  background: var(--accent-light);
}
.info-content {
  border: 2px solid var(--accent-dark);
  border-radius: 8px;
  padding: 15px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.6s ease;
}
.light-theme .info-content {
  border: 2px solid var(--accent-light);
}
.info-content.fade-in {
  animation: fadeIn 0.6s;
}
.info-content:not(.hidden) {
  max-height: 300px;
}
.news-column h3 {
  font-size: 20px;
  margin-bottom: 10px;
  border-bottom: 1px solid currentColor;
  padding-bottom: 5px;
}
.news-item {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  align-items: flex-start;
}
.news-img img {
  width: 180px;
  height: auto;
  border-radius: 4px;
  object-fit: cover;
}
.news-body {
  flex: 1;
}
.news-body h4 {
  font-size: 18px;
  margin-bottom: 6px;
}
.news-snippet {
  font-size: 14px;
  line-height: 1.4;
  margin-bottom: 8px;
}
.full-snippet.hidden {
  display: none;
}
.news-author {
  font-size: 13px;
  font-style: italic;
  margin-bottom: 8px;
  opacity: 0.9;
}
.toggle-desc-btn {
  margin-bottom: 6px;
  background: var(--accent-dark);
  border: none;
  color: #fff;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  transition: background var(--transition-speed);
}
.toggle-desc-btn:hover {
  filter: brightness(0.9);
}
.light-theme .toggle-desc-btn {
  background: var(--accent-light);
}
.news-more {
  font-size: 14px;
  text-decoration: none;
  font-weight: 600;
  color: var(--accent-dark);
  margin-left: 10px;
}
.light-theme .news-more {
  color: var(--accent-light);
}
.news-more:hover {
  text-decoration: underline;
}
.footer {
  width: 100%;
  padding: 20px;
  background: var(--container-dark);
  text-align: center;
  transition: background var(--transition-speed);
}
.light-theme .footer {
  background: var(--container-light);
}
.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
}
.social-icon {
  color: currentColor;
  transition: transform 0.3s;
  display: inline-flex;
  width: 40px;
  height: 40px;
}
.social-icon:hover {
  transform: scale(1.15);
}
.icon-github,
.icon-linkedin {
  width: 100%;
  height: 100%;
  fill: currentColor;
}
@media (max-width: 600px) {
  .sidebar-left { display: none; }
  .main-layout { grid-template-columns: 1fr; }
  .center-content { order: 1; }
  .news-column { order: 2; }
  .news-item { flex-direction: column; }
  .news-img img { width: 100%; margin-bottom: 10px; }
}
@media (max-width: 992px) and (min-width: 601px) {
  .main-layout {
    grid-template-columns: 250px 1fr;
    grid-template-areas: "sidebar-left center-content" "sidebar-left news-column";
  }
  .sidebar-left { grid-area: sidebar-left; }
  .center-content { grid-area: center-content; }
  .news-column { grid-area: news-column; }
  .news-item { flex-direction: row; }
}