:root {
  --bg: #0d0f13;
  --panel: #131722;
  --panel-soft: #1c2230;
  --text: #f2f4f8;
  --muted: #9aa4b2;
  --accent: #f7e479;
  --accent-strong: #ffd84a;
  --danger: #ff6b6b;
  --success: #6ee7b7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Lucida Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #1a1f2c 0%, #0d0f13 60%);
  color: var(--text);
}

.page {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: linear-gradient(180deg, #10141f 0%, #0b0e16 100%);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  border-right: 1px solid #1f2433;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(140deg, #f7e479 0%, #caa82e 100%);
  box-shadow: 0 6px 18px rgba(247, 228, 121, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.5px;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--muted);
}

.content {
  flex: 1;
  padding: 28px 36px 48px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--panel);
  padding: 22px 24px;
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  margin-bottom: 24px;
}

.topbar h1 {
  margin: 0 0 6px 0;
  font-size: 1.8rem;
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.primary-btn {
  display: inline-block;
  background: var(--accent);
  color: #1b1f2a;
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
}

.ghost-btn {
  display: inline-block;
  color: var(--accent);
  border: 1px solid rgba(247, 228, 121, 0.4);
  padding: 10px 14px;
  border-radius: 10px;
  text-decoration: none;
}

.pill {
  background: rgba(247, 228, 121, 0.15);
  color: var(--accent);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--panel);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 12px 22px rgba(0, 0, 0, 0.25);
}

.card h3 {
  margin-top: 0;
}

.card p {
  color: var(--muted);
}

.sidebar-card {
  background: var(--panel-soft);
  padding: 18px;
  border-radius: 16px;
  color: var(--muted);
}

.sidebar-card h3 {
  margin-top: 0;
  color: var(--text);
}

.alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 18px;
  font-weight: 600;
}

.alert-success {
  background: rgba(110, 231, 183, 0.12);
  color: var(--success);
  border: 1px solid rgba(110, 231, 183, 0.3);
}

.alert-error {
  background: rgba(255, 107, 107, 0.12);
  color: var(--danger);
  border: 1px solid rgba(255, 107, 107, 0.3);
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
}

.table th, .table td {
  padding: 12px;
  border-bottom: 1px solid #22293a;
  text-align: left;
}

.table th {
  color: var(--muted);
  font-size: 0.85rem;
}

.table td a {
  color: var(--accent);
  text-decoration: none;
}

.table td a:hover {
  text-decoration: underline;
}

.form-section {
  background: var(--panel);
  padding: 24px;
  border-radius: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.input-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.input-field input, .input-field select, .input-field textarea {
  background: #0f1420;
  border: 1px solid #2a3143;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
}

.input-field textarea {
  min-height: 120px;
}

.submit-btn {
  background: var(--accent);
  color: #1b1f2a;
  border: none;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}

.link-btn {
  background: transparent;
  border: none;
  color: var(--accent);
  cursor: pointer;
}

/* Radio menu from Uiverse */
.radio-container {
  --main-color: #f7e479;
  --main-color-opacity: #f7e4791c;
  --total-radio: 9;
  display: flex;
  flex-direction: column;
  position: relative;
  padding-left: 0.5rem;
  gap: 2px;
}

.radio-container input {
  cursor: pointer;
  appearance: none;
}

.radio-container .glider-container {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: linear-gradient(
    0deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(27, 27, 27, 1) 50%,
    rgba(0, 0, 0, 0) 100%
  );
  width: 1px;
}

.radio-container .glider-container .glider {
  position: relative;
  height: calc(100% / var(--total-radio));
  width: 100%;
  background: linear-gradient(
    0deg,
    rgba(0, 0, 0, 0) 0%,
    var(--main-color) 50%,
    rgba(0, 0, 0, 0) 100%
  );
  transition: transform 0.5s cubic-bezier(0.37, 1.95, 0.66, 0.56);
}

.radio-container .glider-container .glider::before {
  content: "";
  position: absolute;
  height: 60%;
  width: 300%;
  top: 50%;
  transform: translateY(-50%);
  background: var(--main-color);
  filter: blur(10px);
}

.radio-container .glider-container .glider::after {
  content: "";
  position: absolute;
  left: 0;
  height: 100%;
  width: 150px;
  background: linear-gradient(
    90deg,
    var(--main-color-opacity) 0%,
    rgba(0, 0, 0, 0) 100%
  );
}

.radio-container label {
  cursor: pointer;
  padding: 0.9rem 0.6rem;
  position: relative;
  color: grey;
  transition: all 0.3s ease-in-out;
  font-weight: 600;
}

.radio-container input:checked + label {
  color: var(--main-color);
}

.radio-container input:nth-of-type(1):checked ~ .glider-container .glider { transform: translateY(0); }
.radio-container input:nth-of-type(2):checked ~ .glider-container .glider { transform: translateY(100%); }
.radio-container input:nth-of-type(3):checked ~ .glider-container .glider { transform: translateY(200%); }
.radio-container input:nth-of-type(4):checked ~ .glider-container .glider { transform: translateY(300%); }
.radio-container input:nth-of-type(5):checked ~ .glider-container .glider { transform: translateY(400%); }
.radio-container input:nth-of-type(6):checked ~ .glider-container .glider { transform: translateY(500%); }
.radio-container input:nth-of-type(7):checked ~ .glider-container .glider { transform: translateY(600%); }
.radio-container input:nth-of-type(8):checked ~ .glider-container .glider { transform: translateY(700%); }

/* Login/Register form from Uiverse */
.form-container {
  width: 320px;
  border-radius: 0.75rem;
  background-color: rgba(17, 24, 39, 1);
  padding: 2rem;
  color: rgba(243, 244, 246, 1);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.title {
  text-align: center;
  font-size: 1.5rem;
  line-height: 2rem;
  font-weight: 700;
}

.form {
  margin-top: 1.5rem;
}

.input-group {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.input-group label {
  display: block;
  color: rgba(156, 163, 175, 1);
  margin-bottom: 4px;
}

.input-group input {
  width: 100%;
  border-radius: 0.375rem;
  border: 1px solid rgba(55, 65, 81, 1);
  outline: 0;
  background-color: rgba(17, 24, 39, 1);
  padding: 0.75rem 1rem;
  color: rgba(243, 244, 246, 1);
}

.input-group input:focus {
  border-color: rgba(167, 139, 250);
}

.forgot {
  display: flex;
  justify-content: flex-end;
  font-size: 0.75rem;
  line-height: 1rem;
  color: rgba(156, 163, 175,1);
  margin: 8px 0 14px 0;
}

.forgot a, .signup a {
  color: rgba(243, 244, 246, 1);
  text-decoration: none;
  font-size: 14px;
}

.forgot a:hover, .signup a:hover {
  text-decoration: underline rgba(167, 139, 250, 1);
}

.sign {
  display: block;
  width: 100%;
  background-color: rgba(167, 139, 250, 1);
  padding: 0.75rem;
  text-align: center;
  color: rgba(17, 24, 39, 1);
  border: none;
  border-radius: 0.375rem;
  font-weight: 600;
}

.social-message {
  display: flex;
  align-items: center;
  padding-top: 1rem;
}

.line {
  height: 1px;
  flex: 1 1 0%;
  background-color: rgba(55, 65, 81, 1);
}

.social-message .message {
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: rgba(156, 163, 175, 1);
}

.social-icons {
  display: flex;
  justify-content: center;
}

.social-icons .icon {
  border-radius: 0.125rem;
  padding: 0.75rem;
  border: none;
  background-color: transparent;
  margin-left: 8px;
}

.social-icons .icon svg {
  height: 1.25rem;
  width: 1.25rem;
  fill: #fff;
}

.signup {
  text-align: center;
  font-size: 0.75rem;
  line-height: 1rem;
  color: rgba(156, 163, 175, 1);
}

.center-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
  padding: 12px 0;
}

.lesson-list {
  display: grid;
  gap: 12px;
}

.lesson {
  background: #101521;
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid #20283a;
}

.lesson h4 {
  margin: 0 0 6px 0;
}

.badge {
  display: inline-block;
  background: rgba(247, 228, 121, 0.2);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  margin-bottom: 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.stat {
  background: #0f1420;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid #20283a;
}

.stat h4 {
  margin: 0 0 6px 0;
}

.progress-bar {
  background: #1b2232;
  border-radius: 999px;
  overflow: hidden;
  height: 10px;
  margin-top: 8px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #f7e479 0%, #ffd84a 100%);
  width: 0%;
}

.tag {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(110, 231, 183, 0.15);
  color: var(--success);
  font-size: 0.75rem;
  margin-left: 6px;
}

.quiz-question {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #101521;
  border: 1px solid #20283a;
}

.option-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0 0;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  background: #0f1420;
  margin-bottom: 8px;
  border: 1px solid transparent;
}

.option-item input {
  accent-color: #f7e479;
}

.option-item:hover {
  border-color: #2a3143;
}

.content-list {
  display: grid;
  gap: 16px;
}

.content-item {
  background: #0f1420;
  border-radius: 16px;
  padding: 16px;
  border: 1px solid #20283a;
}

.content-meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 6px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 1.2fr);
  gap: 20px;
}

@media (max-width: 980px) {
  .split-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .page {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
  }
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}


.radio-container input:nth-of-type(9):checked ~ .glider-container .glider { transform: translateY(800%); }


.attempt-chart {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.attempt-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.attempt-bar {
  flex: 1;
  height: 10px;
  background: #1b2232;
  border-radius: 999px;
  overflow: hidden;
}

.attempt-fill {
  height: 100%;
  background: linear-gradient(90deg, #f7e479 0%, #ffd84a 100%);
}

.attempt-meta {
  min-width: 140px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: right;
}