:root {
  --ink-strong: #18263f;
  --ink-soft: #617089;
  --ink-light: #f3f6fb;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --surface-dark: #12223a;
  --line: rgba(24, 38, 63, 0.1);
  --shadow: 0 20px 50px rgba(26, 39, 63, 0.12);
  --shadow-soft: 0 12px 26px rgba(19, 31, 52, 0.08);
  --gold: #f0b949;
  --gold-deep: #bb7d21;
  --red-start: #d64545;
  --red-end: #861d2e;
  --blue-start: #0d3b66;
  --blue-end: #1e5fa8;
  --mint-start: #c6f6e8;
  --mint-end: #7bdcb5;
  --success-bg: #ebfff4;
  --success-text: #12663d;
  --warning-bg: #fff6db;
  --warning-text: #856100;
  --danger-bg: #ffe9ea;
  --danger-text: #9a2030;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink-strong);
  background:
    radial-gradient(circle at 0% 0%, rgba(252, 214, 123, 0.34), transparent 24%),
    radial-gradient(circle at 100% 10%, rgba(58, 120, 198, 0.16), transparent 25%),
    linear-gradient(180deg, #f9f4ea 0%, #f6f9ff 55%, #edf3fb 100%);
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
strong {
  font-family: Georgia, "Times New Roman", serif;
  letter-spacing: 0.01em;
}

button,
input,
select {
  font: inherit;
}

.backdrop {
  position: fixed;
  inset: auto auto 0 0;
  pointer-events: none;
  border-radius: 999px;
  filter: blur(20px);
  opacity: 0.58;
}

.backdrop-one {
  width: 380px;
  height: 380px;
  background: rgba(224, 172, 62, 0.18);
  left: -80px;
  top: 120px;
}

.backdrop-two {
  width: 520px;
  height: 520px;
  background: rgba(36, 96, 179, 0.14);
  right: -120px;
  top: 380px;
  left: auto;
}

.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 320px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  color: var(--ink-light);
  background:
    linear-gradient(180deg, rgba(12, 31, 57, 0.98) 0%, rgba(18, 42, 77, 0.97) 60%, rgba(28, 61, 102, 0.95) 100%);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.05);
}

.brand-lockup {
  display: flex;
  gap: 14px;
  align-items: center;
}

.brand-badge {
  width: 54px;
  height: 54px;
  display: inline-grid;
  place-items: center;
  border-radius: 16px;
  color: #16253f;
  font-weight: 800;
  background: linear-gradient(135deg, #f7e4a4 0%, #f0b949 100%);
  box-shadow: 0 8px 22px rgba(240, 185, 73, 0.24);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 245, 220, 0.7);
}

.sidebar h1 {
  margin: 0;
  font-size: 2rem;
}

.brand-copy {
  margin: 20px 0 0;
  line-height: 1.6;
  color: rgba(234, 242, 255, 0.8);
}

.divider {
  height: 1px;
  margin: 24px 0 18px;
  background: linear-gradient(90deg, rgba(240, 185, 73, 0.5), rgba(255, 255, 255, 0.08));
}

.menu {
  display: grid;
  gap: 12px;
}

.menu button {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink-light);
  border-radius: 18px;
  padding: 15px 16px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.menu button:hover,
.menu button.active {
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.13);
  border-color: rgba(240, 185, 73, 0.5);
}

.menu-title {
  display: block;
  font-weight: 700;
}

.menu button small {
  display: block;
  margin-top: 5px;
  opacity: 0.7;
}

.sidebar-footer {
  display: grid;
  gap: 12px;
}

.footer-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
}

.footer-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(234, 242, 255, 0.7);
}

.logout-btn {
  border: 1px solid rgba(240, 185, 73, 0.35);
  background: transparent;
  color: #ffecc0;
  border-radius: 14px;
  padding: 12px 14px;
  cursor: pointer;
}

.signature {
  color: rgba(234, 242, 255, 0.68);
  font-size: 0.92rem;
}

.main-content {
  padding: 34px 36px 40px;
}

.page-header {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 26px;
}

.page-header h2 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 3vw, 3rem);
  color: #10213b;
}

.page-header p {
  margin: 0;
  max-width: 720px;
  color: var(--ink-soft);
}

.hero-card {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 8px;
  align-content: center;
  min-height: 150px;
  padding: 24px;
  border-radius: 28px;
  color: #fff9ee;
  background:
    linear-gradient(145deg, rgba(16, 39, 72, 0.95) 0%, rgba(42, 79, 129, 0.92) 58%, rgba(238, 176, 68, 0.9) 100%);
  box-shadow: var(--shadow);
}

.hero-card::after {
  content: "";
  position: absolute;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  right: -40px;
  top: -30px;
  background: rgba(255, 255, 255, 0.12);
}

.hero-kicker {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.85;
}

.hero-card strong {
  font-size: 1.65rem;
}

#feedback {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.notice {
  border-radius: 18px;
  padding: 15px 18px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.55);
}

.notice.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.notice.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.notice.error {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.section-intro {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 18px;
}

.section-intro h3 {
  margin: 6px 0 0;
  font-size: 1.75rem;
}

.section-intro p {
  max-width: 520px;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.panel {
  background: var(--surface);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 18px;
}

.accent-panel {
  background:
    linear-gradient(180deg, rgba(255, 250, 239, 0.92) 0%, rgba(255, 255, 255, 0.82) 100%);
  border-color: rgba(240, 185, 73, 0.3);
}

.panel h3,
.panel h4 {
  margin-top: 0;
}

.grid-2,
.grid-5,
.metrics-grid {
  display: grid;
  gap: 18px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.metrics-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.split-focus {
  align-items: start;
}

.glass-stack {
  display: grid;
  gap: 8px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.field label {
  font-weight: 700;
}

.field input[type="text"],
.field input[type="password"],
.field input[type="date"],
.field input[type="number"],
.field select {
  width: 100%;
  border: 1px solid rgba(24, 38, 63, 0.12);
  border-radius: 16px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink-strong);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: rgba(13, 59, 102, 0.45);
  box-shadow: 0 0 0 4px rgba(40, 97, 170, 0.12);
}

.switch-row label {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-grid {
  display: grid;
  gap: 10px;
}

.checkbox-grid.columns-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  border: 1px solid rgba(24, 38, 63, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-soft);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.top-gap {
  margin-top: 18px;
}

.btn {
  border: 0;
  border-radius: 16px;
  padding: 13px 18px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn.primary {
  color: #fffaf0;
  background: linear-gradient(135deg, var(--blue-start) 0%, var(--blue-end) 58%, #f0b949 100%);
  box-shadow: 0 14px 28px rgba(20, 58, 104, 0.2);
}

.btn.secondary {
  color: var(--ink-strong);
  background: rgba(244, 247, 252, 0.98);
}

.btn.ghost {
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid rgba(24, 38, 63, 0.12);
}

.btn.danger {
  color: #fff6f6;
  background: linear-gradient(135deg, var(--red-start) 0%, var(--red-end) 100%);
}

.btn.wide {
  width: 100%;
}

.metric-card {
  position: relative;
  overflow: hidden;
  color: #fefaf2;
  border-radius: 22px;
  padding: 18px 20px;
  background:
    linear-gradient(135deg, rgba(14, 49, 86, 0.96) 0%, rgba(34, 93, 161, 0.92) 60%, rgba(240, 185, 73, 0.92) 100%);
  box-shadow: var(--shadow);
}

.metric-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  right: -24px;
  top: -26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.metric-label,
.metric-note {
  display: block;
  opacity: 0.88;
}

.metric-value {
  display: block;
  margin: 8px 0 4px;
  font-size: 1.8rem;
}

.summary-list,
.mini-list {
  display: grid;
  gap: 12px;
}

.mini-item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(24, 38, 63, 0.08);
  background: rgba(255, 255, 255, 0.8);
}

.mini-item strong {
  font-size: 1.05rem;
}

.month-bundle small {
  line-height: 1.5;
}

.student-card {
  background: rgba(255, 255, 255, 0.92);
  border-radius: 20px;
  padding: 18px 20px;
  margin-bottom: 14px;
  border-left: 7px solid var(--belt-color, #d8d7d3);
  box-shadow: var(--shadow-soft);
}

.student-topline {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.student-card h4 {
  margin: 0 0 6px;
}

.belt {
  color: var(--ink-soft);
}

.detail {
  margin-top: 8px;
  color: #42536d;
}

.point-chip {
  padding: 10px 12px;
  border-radius: 999px;
  color: #0f284a;
  background: rgba(240, 185, 73, 0.16);
}

.progress-track {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  margin-top: 12px;
  background: rgba(13, 59, 102, 0.08);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #0d3b66 0%, #2e7bc5 60%, #f0b949 100%);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 18px;
  overflow: hidden;
}

thead {
  background: rgba(22, 53, 91, 0.08);
}

th,
td {
  padding: 13px 10px;
  text-align: left;
  border-bottom: 1px solid rgba(24, 38, 63, 0.08);
}

.muted {
  color: var(--ink-soft);
}

.hidden {
  display: none !important;
}

.login-shell {
  min-height: 62vh;
  display: grid;
  place-items: center;
}

.login-panel {
  width: min(960px, 100%);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: stretch;
}

.login-copy,
.login-card {
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.login-copy {
  color: #fff7ea;
  background:
    linear-gradient(140deg, rgba(17, 42, 74, 0.98) 0%, rgba(36, 82, 137, 0.94) 58%, rgba(240, 185, 73, 0.88) 100%);
}

.login-copy h3 {
  margin: 0 0 12px;
  font-size: 2rem;
}

.login-copy p {
  color: rgba(255, 248, 232, 0.84);
  line-height: 1.7;
}

.feature-list {
  margin: 18px 0 0;
  padding-left: 18px;
  line-height: 1.9;
}

.login-card {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.92);
}

.login-card h4 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 1.45rem;
}

@media (max-width: 1220px) {
  .page-header {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
  }
}

@media (max-width: 880px) {
  .main-content {
    padding: 24px 18px 28px;
  }

  .grid-2,
  .grid-5,
  .metrics-grid,
  .checkbox-grid.columns-2,
  .login-panel {
    grid-template-columns: 1fr;
  }

  .section-intro {
    flex-direction: column;
    align-items: start;
  }

  .student-topline {
    flex-direction: column;
    align-items: start;
  }
}