/* Course interest registration — demand survey form */

.interest-page {
  --interest-accent: var(--theme-green);
  --interest-accent-2: var(--theme-blue);
  --interest-line: color-mix(in srgb, var(--color-border) 62%, transparent);
  --interest-soft: color-mix(in srgb, var(--interest-accent) 7%, var(--color-bg));
  --interest-field-gap: 1.25rem;
  --interest-section-gap: 2rem;
  --interest-row-gap: 1.25rem;
}

#main-content:has(.interest-page) {
  background:
    radial-gradient(ellipse 70% 50% at 100% 0%, rgba(var(--rgb-green), 0.1), transparent 55%),
    radial-gradient(ellipse 55% 42% at 0% 10%, rgba(var(--rgb-blue), 0.08), transparent 50%),
    linear-gradient(180deg, var(--interest-soft) 0%, var(--color-bg) 24%, var(--color-bg) 100%);
}

.interest-page {
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

/* Hero */
.interest-hero {
  padding: clamp(2rem, 5vw, 3.25rem) 0 1.5rem;
  max-width: 52rem;
}

.interest-hero__label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--interest-accent);
  margin-bottom: 0.55rem;
}

.interest-hero__label::before {
  content: '';
  width: 1.75rem;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}

.interest-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.2vw, 2.65rem);
  font-weight: 500;
  line-height: 1.12;
  margin: 0 0 0.75rem;
  max-width: 22ch;
}

.interest-hero__lead {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(1rem, 2vw, 1.08rem);
  line-height: 1.58;
  color: var(--color-text-soft);
}

/* Layout — narrow sidebar, wide form */
.interest-layout {
  display: grid;
  grid-template-columns: minmax(11rem, 0.42fr) minmax(0, 1.58fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}

/* Aside */
.interest-aside {
  max-width: 17.5rem;
  position: sticky;
  top: calc(var(--header-height, 4rem) + 1rem);
}

.interest-aside__card {
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--interest-line);
  background: color-mix(in srgb, var(--color-surface) 94%, var(--interest-soft));
  box-shadow: var(--color-shadow);
}

.interest-aside__card h2 {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 500;
  margin: 0 0 0.55rem;
}

.interest-aside__summary {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.42;
  color: var(--color-text-soft);
}

.interest-aside__note {
  margin: 0.65rem 0 0;
  font-size: 0.76rem;
  line-height: 1.4;
  color: var(--color-muted);
}

.interest-aside__highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.interest-aside__highlights li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--interest-line);
  background: var(--color-surface);
  font-size: 0.7rem;
  color: var(--color-muted);
  line-height: 1.2;
}

.interest-aside__highlight-num {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--interest-accent);
}

/* Form panel */
.interest-form-panel {
  min-width: 0;
}

.interest-form-panel__inner {
  padding: clamp(1.5rem, 3.5vw, 2.1rem);
  border-radius: 18px;
  border: 1px solid var(--interest-line);
  background: var(--color-surface);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.07);
}

.interest-form-panel__inner h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0 0 0.35rem;
}

.interest-form-panel__hint {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

.interest-form {
  display: flex;
  flex-direction: column;
  gap: var(--interest-section-gap);
}

.interest-form__section {
  margin: 0;
  padding: 0;
  border: none;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--interest-field-gap);
}

.interest-form__section legend {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--interest-accent);
  margin: 0;
  padding: 0;
}

.interest-form__section-hint {
  margin: 0;
  font-size: 0.84rem;
  color: var(--color-text-soft);
}

.interest-form__row {
  display: grid;
  gap: var(--interest-row-gap);
}

.interest-form__group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.interest-form__group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0;
}

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

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

.interest-form__req {
  color: #c44;
  margin-inline-start: 0.15rem;
}

.interest-form__control,
.interest-form input[type="text"],
.interest-form input[type="email"],
.interest-form input[type="tel"],
.interest-form select,
.interest-form textarea {
  width: 100%;
  padding: 0.68rem 0.78rem;
  font: inherit;
  font-size: 0.94rem;
  border-radius: 10px;
  border: 1px solid var(--interest-line);
  background: var(--color-bg);
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.interest-form__control:focus,
.interest-form input:focus,
.interest-form select:focus,
.interest-form textarea:focus {
  outline: none;
  border-color: var(--interest-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--interest-accent) 22%, transparent);
}

.interest-form textarea {
  resize: vertical;
  min-height: 5.5rem;
}

.interest-form__help {
  display: block;
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.interest-form__error {
  display: block;
  margin: 0;
  font-size: 0.8rem;
  color: #b33;
}

.interest-form__group.has-error .interest-form__control,
.interest-form__group.has-error input,
.interest-form__group.has-error select,
.interest-form__group.has-error textarea,
.interest-form__section.has-error {
  border-color: color-mix(in srgb, #c44 50%, var(--interest-line));
}

.interest-form__errors {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: color-mix(in srgb, #c44 8%, var(--color-surface));
  border: 1px solid color-mix(in srgb, #c44 25%, transparent);
  font-size: 0.9rem;
  color: #922;
}

/* Course checkboxes */
.interest-form__courses {
  display: grid;
  gap: 0.75rem;
}

.interest-form__group--other {
  margin-top: 0;
}

.interest-form__course-option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--interest-line);
  background: color-mix(in srgb, var(--color-bg) 80%, var(--color-surface));
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.interest-form__course-option:hover {
  border-color: color-mix(in srgb, var(--interest-accent) 35%, var(--interest-line));
  background: var(--color-surface-hover);
}

.interest-form__course-option:has(input:checked) {
  border-color: color-mix(in srgb, var(--interest-accent) 55%, var(--interest-line));
  background: color-mix(in srgb, var(--interest-accent) 6%, var(--color-surface));
  box-shadow: 0 4px 16px rgba(var(--rgb-green), 0.08);
}

.interest-form__course-option input[type="checkbox"] {
  flex-shrink: 0;
  width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.15rem;
  accent-color: var(--interest-accent);
}

.interest-form__course-label {
  font-size: 0.9rem;
  line-height: 1.4;
}

/* CAPTCHA */
.interest-captcha {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1.25rem;
}

.interest-captcha__image-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 12px;
  border: 1px solid var(--interest-line);
  background: var(--color-bg);
}

.interest-captcha__image {
  display: block;
  border-radius: 6px;
}

.interest-captcha__refresh {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  border: 1px solid var(--interest-line);
  background: var(--color-surface);
  font-size: 1.15rem;
  color: var(--interest-accent);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.interest-captcha__refresh:hover {
  background: var(--interest-soft);
  border-color: var(--interest-accent);
}

.interest-captcha__input {
  flex: 1;
  min-width: 10rem;
}

.interest-form__submit {
  margin-top: 0.5rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* Success */
.interest-success {
  padding: clamp(2rem, 5vw, 3rem) 1.5rem;
  text-align: center;
  border-radius: 18px;
  border: 1px solid var(--interest-line);
  background: var(--color-surface);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.07);
}

.interest-success__icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-brand, var(--interest-accent));
}

.interest-success h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  margin: 0 0 0.65rem;
}

.interest-success p {
  margin: 0 auto 1.35rem;
  max-width: 42ch;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--color-text-soft);
}

/* Homepage banner button */
.home-interest-banner {
  position: relative;
  z-index: 2;
  margin-top: clamp(0.75rem, 2vw, 1.25rem);
  margin-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}

.home-interest-banner__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  padding: 1rem 1.35rem;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid color-mix(in srgb, var(--theme-green) 35%, var(--home-line));
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--theme-green) 10%, var(--color-surface)) 0%,
    color-mix(in srgb, var(--theme-blue) 8%, var(--color-surface)) 100%
  );
  box-shadow: var(--color-shadow);
}

.home-interest-banner__text {
  flex: 1;
  min-width: min(100%, 18rem);
}

.home-interest-banner__label {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--theme-green);
  margin-bottom: 0.25rem;
}

.home-interest-banner__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  font-weight: 500;
  line-height: 1.3;
}

.home-interest-banner__desc {
  margin: 0.25rem 0 0;
  font-size: 0.88rem;
  color: var(--color-text-soft);
  max-width: 48ch;
}

.btn-interest {
  border: none;
  background: var(--gradient-brand);
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-interest:hover {
  color: #fff;
}

.hero-cta .btn-interest-outline {
  border: 1px solid color-mix(in srgb, var(--theme-green) 45%, var(--color-border));
  background: color-mix(in srgb, var(--theme-green) 8%, var(--color-surface));
  color: var(--theme-green-dark);
}

.hero-cta .btn-interest-outline:hover {
  border-color: var(--theme-green);
  background: color-mix(in srgb, var(--theme-green) 14%, var(--color-surface));
  color: var(--theme-green-dark);
}

/* Responsive */
@media (max-width: 960px) {
  .interest-layout {
    grid-template-columns: 1fr;
  }

  .interest-aside {
    position: static;
    max-width: none;
  }
}

@media (max-width: 640px) {
  .interest-page {
    --interest-field-gap: 1.1rem;
    --interest-section-gap: 1.65rem;
    --interest-row-gap: 1.1rem;
  }

  .interest-form__row--2,
  .interest-form__row--3 {
    grid-template-columns: 1fr;
  }

  .interest-captcha {
    flex-direction: column;
  }

  .home-interest-banner__inner {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .home-interest-banner__desc {
    max-width: none;
  }

  .btn-interest {
    width: 100%;
    justify-content: center;
  }
}