:root {
  --bg: #edf4f1;
  --surface: #fffefa;
  --ink: #17231f;
  --muted: #62736d;
  --line: #d8e2dc;
  --green: #1c7c5a;
  --green-dark: #135a41;
  --mint: #dff4e9;
  --sky: #e3f0ff;
  --sun: #ffe9a8;
  --rose: #ffe4de;
  --blue: #2f6fbb;
  --coral: #cf6559;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 10%, rgba(255, 233, 168, 0.55), transparent 28%),
    radial-gradient(circle at 90% 0%, rgba(227, 240, 255, 0.75), transparent 30%),
    linear-gradient(180deg, #f8fbf7 0%, var(--bg) 48%, #e7f0ee 100%);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

.app-shell {
  width: min(880px, calc(100% - 28px));
  margin: 18px auto 40px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  align-items: center;
  gap: 16px;
  min-height: 218px;
  margin: 18px 0;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(255, 254, 250, 0.94), rgba(223, 244, 233, 0.92)),
    linear-gradient(135deg, var(--sun), var(--sky));
  box-shadow: 0 18px 45px rgba(23, 35, 31, 0.10);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 620px;
  font-size: 34px;
  line-height: 1.08;
}

.hero-text {
  max-width: 560px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.hero-card {
  display: grid;
  place-items: center;
}

.mini-board {
  width: 158px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  gap: 5px;
  padding: 18px;
  border: 1px solid rgba(28, 124, 90, 0.25);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(28, 124, 90, 0.14);
  transform: rotate(2deg);
}

.mini-board span {
  width: 48px;
  height: 8px;
  border-radius: 99px;
  background: var(--sun);
}

.mini-board strong {
  color: var(--green);
  font-size: 34px;
}

.mini-board em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.status {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  color: var(--muted);
  font-size: 13px;
}

.panel,
.result,
.usage-card,
.plans-card,
.support-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(23, 35, 31, 0.08);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 22px 0;
}

.panel-head h2 {
  margin: 0;
  font-size: 22px;
}

.panel-head p {
  max-width: 310px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.lesson-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 22px;
}

label,
fieldset {
  display: grid;
  gap: 8px;
  min-width: 0;
  margin: 0;
}

.full {
  grid-column: 1 / -1;
}

span,
legend {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

select,
textarea,
button {
  width: 100%;
  border-radius: 8px;
  font: inherit;
}

select,
textarea {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  padding: 12px 13px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

select:focus,
textarea:focus {
  outline: 3px solid rgba(28, 124, 90, 0.14);
  border-color: var(--green);
}

textarea {
  resize: vertical;
}

fieldset {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  background: linear-gradient(180deg, #ffffff, #fbfdfb);
}

legend {
  padding: 0 6px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 14px;
}

.check input {
  width: 17px;
  height: 17px;
}

.actions {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

button {
  border: 0;
  background: linear-gradient(135deg, var(--green), #249f72);
  color: #ffffff;
  padding: 14px 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 22px rgba(28, 124, 90, 0.24);
}

button:hover {
  background: var(--green-dark);
}

button:disabled {
  cursor: progress;
  opacity: 0.75;
}

button.secondary {
  width: auto;
  min-width: 150px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--green);
}

button.secondary:hover {
  border-color: var(--green);
  background: #f6faf7;
}

.result {
  margin-top: 18px;
  padding: 18px;
  border-color: rgba(28, 124, 90, 0.25);
}

.billing-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 18px;
  margin-top: 18px;
}

.usage-card,
.plans-card {
  padding: 18px;
}

.support-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-top: 18px;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(255, 254, 250, 0.97), rgba(227, 240, 255, 0.82)),
    var(--surface);
}

.support-card h2 {
  margin: 0 0 8px;
  font-size: 21px;
}

.support-card p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
}

.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.support-actions a {
  min-width: 128px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--green);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.support-actions a:first-child {
  background: linear-gradient(135deg, var(--green), #249f72);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(28, 124, 90, 0.18);
}

.usage-card h2,
.plans-card h2 {
  margin: 0 0 8px;
  font-size: 21px;
}

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

.usage-meter {
  height: 10px;
  margin: 14px 0 10px;
  overflow: hidden;
  border-radius: 99px;
  background: #e8eee9;
}

.usage-meter span {
  display: block;
  height: 100%;
  width: var(--value);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--green), #56bf8c);
}

.plans-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.plans-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.plan {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff, #f8fbf9);
}

.plan strong {
  font-size: 17px;
}

.plan small {
  color: var(--muted);
  line-height: 1.4;
}

.plan button {
  padding: 10px 12px;
  box-shadow: none;
}

.result h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

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

.result a {
  color: var(--blue);
  font-weight: 700;
}

.link-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.link-list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f8fbf9);
  text-decoration: none;
}

.link-list a:hover {
  border-color: var(--blue);
}

.error {
  color: var(--coral);
}

@media (max-width: 720px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .hero-card {
    justify-content: start;
  }

  .lesson-form,
  fieldset,
  .actions,
  .billing-grid,
  .plans-list,
  .support-card {
    grid-template-columns: 1fr;
  }

  .support-card {
    display: grid;
  }

  .support-actions {
    justify-content: stretch;
  }

  .support-actions a {
    flex: 1 1 100%;
  }

  button.secondary {
    width: 100%;
  }

  h1 {
    font-size: 29px;
  }
}