/* ============================================
   The Music Treehouse � base styles
   Palette derived from the treehouse logo:
   warm cream background, leaf green, terracotta,
   plum purple, teal accents.
   ============================================ */

:root {
  --color-bg: #FBF6EA;
  --color-bg-alt: #F3ECDA;
  --color-surface: #FFFFFF;
  --color-text: #3E3529;
  --color-text-muted: #6B6153;
  --color-green: #4C7A4A;
  --color-green-dark: #3A5E39;
  --color-terracotta: #B85427;
  --color-terracotta-dark: #8F3D17;
  --color-purple: #7C5AA0;
  --color-teal: #2F8C8C;
  --color-border: #E4DAC2;
  --color-error: #B3261E;
  --color-error-bg: #FBEAE9;
  --focus-ring: #1B5E9E;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(62, 53, 41, 0.08);
  --max-width: 1080px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 1.0625rem;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--color-green-dark);
  line-height: 1.2;
  margin-top: 0;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); }
h3 { font-size: 1.2rem; }

a {
  color: var(--color-teal);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  display: block;
}

.wrap {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.wrap--narrow {
  max-width: 640px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-green-dark);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  color: #fff;
  background: var(--color-terracotta);
  border: none;
  border-radius: 999px;
  padding: 0.85rem 1.75rem;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  background: var(--color-terracotta-dark);
}

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

.btn--large {
  font-size: 1.1rem;
  padding: 1rem 2.25rem;
}

.btn--small {
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
}

.btn[disabled] {
  opacity: 0.65;
  cursor: not-allowed;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--color-green-dark);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
}

.site-header__logo {
  width: 44px;
  height: 44px;
  mix-blend-mode: multiply;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: 3.5rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.hero__logo {
  width: 250px;
  height: 250px;
  margin-bottom: 0.5rem;
  mix-blend-mode: multiply;
}

.hero__title {
  margin-bottom: 0;
}

.hero__tagline {
  font-family: var(--font-heading);
  font-style: italic;
  color: var(--color-purple);
  font-size: 1.25rem;
  margin: 0;
}

.hero__lede {
  max-width: 46ch;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin: 0;
}

.hero__schedule {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  margin: 0.25rem 0 0.75rem;
}

.hero__schedule p {
  margin: 0.35rem 0;
  font-weight: 600;
  color: var(--color-green-dark);
}

.hero__bird {
  position: absolute;
  width: 130px;
  height: auto;
  mix-blend-mode: multiply;
  opacity: 0.9;
  pointer-events: none;
}

.hero__bird--left {
  left: -20px;
  bottom: 10px;
  transform: scaleX(-1);
}

.hero__bird--right {
  right: -30px;
  top: 30px;
}

@media (max-width: 640px) {
  .hero__bird {
    width: 90px;
  }
  .hero__bird--left { left: -30px; bottom: -10px; }
  .hero__bird--right { right: -35px; top: 10px; }
}

/* Sections */
.section {
  padding-block: 3.5rem;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section-lede {
  color: var(--color-text-muted);
  margin-top: -0.5rem;
}

/* About */
.about {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
}

.about__photo {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: var(--shadow);
  border: 4px solid var(--color-surface);
}

.about__title {
  color: var(--color-terracotta-dark);
  font-weight: 600;
  margin-top: -0.5rem;
}

@media (min-width: 720px) {
  .about {
    flex-direction: row;
    text-align: left;
    align-items: flex-start;
  }
  .about__photo {
    flex-shrink: 0;
  }
}

/* Class info grid */
.info-grid {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.info-card h3 {
  color: var(--color-teal);
  margin-bottom: 0.4rem;
}

.info-card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Form */
#interestForm {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-top: 1.5rem;
}

.form-row {
  margin-bottom: 1.25rem;
}

.form-row label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row input[type="number"],
.form-row textarea {
  width: 100%;
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
}

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

.form-row input:focus-visible,
.form-row textarea:focus-visible {
  border-color: var(--focus-ring);
}

.required {
  color: var(--color-terracotta-dark);
}

.field-optional {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.field-hint {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin: 0.35rem 0 0;
}

.field-hint--inline {
  display: block;
  font-weight: 400;
  margin-top: 0.25rem;
}

.field-error {
  color: var(--color-error);
  background: var(--color-error-bg);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  margin: 0.5rem 0 0;
}

.form-row--invalid input {
  border-color: var(--color-error);
}

.form-row--honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.form-row--checkbox {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem 0.75rem;
  align-items: start;
}

.form-row--checkbox input {
  margin-top: 0.3rem;
  width: 1.15rem;
  height: 1.15rem;
}

.form-row--checkbox label {
  font-weight: 400;
  margin-bottom: 0;
}

.form-row--checkbox .field-error {
  grid-column: 1 / -1;
}

.form-status {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

.form-status--error {
  background: var(--color-error-bg);
  color: var(--color-error);
}

/* Footer */
.site-footer {
  background: var(--color-green-dark);
  color: #EFE9DA;
  padding-block: 2.5rem;
  text-align: center;
}

.site-footer a {
  color: #FFFFFF;
}

.site-footer__name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

.site-footer__copyright {
  color: #D8D2C0;
  font-size: 0.85rem;
  margin-top: 1rem;
}

/* Confirmation dialog */
dialog#confirmationDialog {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  max-width: 420px;
  width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

dialog#confirmationDialog::backdrop {
  background: rgba(62, 53, 41, 0.55);
}

.dialog__content {
  padding: 2rem;
  text-align: center;
}

.dialog__content h2 {
  margin-bottom: 0.6rem;
}

.dialog__content .btn {
  margin-top: 1.25rem;
}