/* ==========================================================================
   PianoCare — Flagship Landing Page Styles
   ========================================================================== */

/* ---------- Custom Properties ---------- */
:root {
  --color-primary: #1a1a2e;
  --color-primary-light: #2a2a4a;
  --color-accent: #d4a843;
  --color-accent-hover: #c49733;
  --color-accent-light: rgba(212, 168, 67, 0.12);
  --color-bg: #fafaf8;
  --color-bg-alt: #f3f1ed;
  --color-text: #2c2c3a;
  --color-text-muted: #6b6b7b;
  --color-white: #ffffff;
  --color-border: #e2e0db;
  --color-success: #2e7d4f;
  --color-error: #c0392b;

  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 100px;

  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 8px 32px rgba(26, 26, 46, 0.10);

  --max-width: 1120px;
  --nav-height: 72px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--color-accent-hover); }

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--sm {
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
}

.btn--lg {
  font-size: 1rem;
  padding: 0.875rem 2rem;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(212, 168, 67, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}
.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* ---------- Section Helpers ---------- */
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.section-heading {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  line-height: 1.2;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-white);
}

.nav__logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  font-weight: 700;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-primary);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(212, 168, 67, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 80% at 80% 20%, rgba(100, 100, 200, 0.06) 0%, transparent 60%),
    linear-gradient(180deg, #1a1a2e 0%, #16162a 100%);
}

/* Subtle decorative lines evoking piano strings */
.hero__bg::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 0;
  right: 0;
  height: 60%;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 79px,
    rgba(212, 168, 67, 0.04) 79px,
    rgba(212, 168, 67, 0.04) 80px
  );
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 4rem);
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

/* ---------- How It Works ---------- */
.how-it-works {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.how-it-works--alt {
  background: var(--color-bg-alt);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.step {
  padding: var(--space-lg) var(--space-md);
}

.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  border: 2px solid var(--color-accent);
}

.step__title {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.step__desc {
  color: var(--color-text-muted);
  font-size: 0.975rem;
  max-width: 320px;
  margin: 0 auto;
}

/* ---------- The Problem ---------- */
.problem {
  padding: var(--space-2xl) 0;
  background: var(--color-primary);
  color: var(--color-white);
  text-align: center;
}

.problem .section-heading {
  color: var(--color-white);
}

.problem__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
}

.stat__label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-xs);
  max-width: 220px;
}

.problem__text {
  max-width: 640px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
  line-height: 1.75;
}

/* ---------- Benefits ---------- */
.benefits {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.benefits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  text-align: left;
}

@media (min-width: 768px) {
  .benefits__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.benefits__column-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

.benefits__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.benefit-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.25s, transform 0.25s;
}

.benefit-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.benefit-card__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  line-height: 1;
}

.benefit-card strong {
  display: block;
  font-size: 0.975rem;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
}

.benefit-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ---------- FAQ ---------- */
.faq {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
  text-align: center;
}

.accordion {
  max-width: 700px;
  margin: 0 auto;
  text-align: left;
}

.accordion__item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xs);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow 0.25s;
}

.accordion__item[open] {
  box-shadow: var(--shadow-md);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) var(--space-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.accordion__trigger::-webkit-details-marker { display: none; }

.accordion__trigger::after {
  content: '+';
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 1.25rem;
  font-weight: 400;
  transition: transform 0.25s ease;
}

.accordion__item[open] .accordion__trigger::after {
  content: '−';
  transform: rotate(180deg);
}

.accordion__trigger:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.accordion__content {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- Waitlist ---------- */
.waitlist {
  padding: var(--space-2xl) 0;
  text-align: center;
}

.waitlist__subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: var(--space-lg);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.waitlist__form {
  max-width: 520px;
  margin: 0 auto;
}

.waitlist__toggle {
  border: none;
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.waitlist__radio {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--color-text);
}

.waitlist__radio input[type="radio"] {
  accent-color: var(--color-accent);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.waitlist__radio input[type="radio"]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.waitlist__fields {
  display: flex;
  gap: var(--space-xs);
}

.waitlist__fields input[type="email"] {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.waitlist__fields input[type="email"]::placeholder {
  color: var(--color-text-muted);
}

.waitlist__fields input[type="email"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.15);
}

.waitlist__privacy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* Form messages (from form-handler.js) */
.form-message {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.925rem;
  font-weight: 500;
}

.form-message--success {
  background: rgba(46, 125, 79, 0.08);
  color: var(--color-success);
  border: 1px solid rgba(46, 125, 79, 0.2);
}

.form-message--error {
  background: rgba(192, 57, 43, 0.08);
  color: var(--color-error);
  border: 1px solid rgba(192, 57, 43, 0.2);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  gap: var(--space-md);
}

.footer__links a {
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--color-accent);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .hero {
    min-height: 90vh;
    padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-xl);
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  .hero__ctas .btn {
    width: 100%;
    max-width: 320px;
  }

  .waitlist__fields {
    flex-direction: column;
  }

  .waitlist__fields .btn {
    width: 100%;
  }

  .waitlist__toggle {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }

  .problem__stats {
    gap: var(--space-lg);
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}