/* Irwin's Styles — single design system for all Irwin pages.
   Fonts: public/fonts/ (Nunito variable, normal + italic).
   /irwin/** also loads base.css (for the site header/footer).
   /bonus/  loads this file only — standalone, no site header/footer. */

/* ── Fonts ───────────────────────────────────────────────────── */

@font-face {
  font-family: 'Nunito';
  src: url('../fonts/Nunito-VariableFont_wght.ttf') format('truetype-variations');
  font-weight: 100 1000;
  font-style: normal;
  font-display: optional;
}
@font-face {
  font-family: 'Nunito';
  src: url('../fonts/Nunito-Italic-VariableFont_wght.ttf') format('truetype-variations');
  font-weight: 100 1000;
  font-style: italic;
  font-display: optional;
}

/* ── Design tokens ───────────────────────────────────────────── */

:root {
  /* Primary — sky blue */
  --irwin-primary:        #5BBFD6;
  --irwin-primary-rgb:    91, 191, 214;
  --irwin-primary-hover:  #3fa0bc;

  /* Accent — warm orange */
  --irwin-accent:         #E8762A;
  --irwin-accent-rgb:     232, 118, 42;
  --irwin-accent-hover:   #c9601c;
  --irwin-accent-lite:    #FFF1E8;

  /* Surfaces */
  --irwin-bg:             #F0FAFF;
  --irwin-bg-white:       #ffffff;
  --irwin-bg-panel:       #D6EEF8;
  --irwin-border:         #ADE3F5;

  /* Text */
  --irwin-text:           #3D3D3A;
  --irwin-text-muted:     #888780;
  --irwin-placeholder:    #bbbbbb;

  /* On-color */
  --irwin-on-primary:     #ffffff;
  --irwin-on-accent:      #ffffff;

  /* Hero */
  --irwin-hero-title:     #2c3e50;
  --irwin-hero-bg-start:  #8ED4E8;
  --irwin-hero-bg-mid:    #B6E2EF;
  --irwin-hero-bg-end:    #D8EFF7;

  /* Feedback */
  --irwin-success:        #2a7a4b;
  --irwin-error:          #c0392b;

  /* Typography */
  --irwin-font:        'Nunito', system-ui, sans-serif;
  --irwin-fs-body-lg:  1.05rem;
  --irwin-fs-body:     1rem;
  --irwin-fs-small:    0.95rem;
  --irwin-fs-label:    0.75rem;
  --irwin-fs-h2:       1.7rem;
  --irwin-fs-h3:       1.15rem;
  --irwin-fw-regular:  400;
  --irwin-fw-semibold: 600;
  --irwin-fw-bold:     700;
  --irwin-fw-black:    800;
  --irwin-lh-tight:    1.2;
  --irwin-lh-snug:     1.4;
  --irwin-lh-body:     1.65;

  /* Spacing */
  --irwin-sp-1:  4px;
  --irwin-sp-2:  8px;
  --irwin-sp-3:  12px;
  --irwin-sp-4:  16px;
  --irwin-sp-5:  24px;
  --irwin-sp-6:  32px;
  --irwin-sp-8:  48px;
  --irwin-sp-10: 80px;

  /* Radii */
  --irwin-radius-input:  10px;
  --irwin-radius-card:   12px;
  --irwin-radius-pill:   50px;
  --irwin-radius-circle: 50%;

  /* Shadows */
  --irwin-shadow-card:             0 4px 20px rgba(var(--irwin-primary-rgb), 0.12);
  --irwin-shadow-card-hover:       0 8px 28px rgba(var(--irwin-primary-rgb), 0.22);
  --irwin-shadow-btn-orange:       0 4px 16px rgba(var(--irwin-accent-rgb), 0.25);
  --irwin-shadow-btn-orange-hover: 0 6px 22px rgba(var(--irwin-accent-rgb), 0.35);
  --irwin-shadow-btn-blue:         0 4px 16px rgba(var(--irwin-primary-rgb), 0.25);

  /* Motion */
  --irwin-duration-fast: 150ms;
  --irwin-duration-base: 200ms;
  --irwin-ease:          ease;
  --irwin-lift-hover:    translateY(-2px);

  /* Layout */
  --irwin-container: 760px;
}

/* ── Reset (needed for standalone /bonus/ — harmless on /irwin/ pages) ── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--irwin-font);
  font-size: var(--irwin-fs-body);
  line-height: var(--irwin-lh-body);
  color: var(--irwin-text);
  background: var(--irwin-bg);
}

/* ── Shared primitives ───────────────────────────────────────── */

/* 760px content wrapper — hub/bonus pages only.
   Do NOT use on /irwin/* pages; those use .book-detail .container (800px). */
.hub-container {
  max-width: var(--irwin-container);
  margin: 0 auto;
  padding: 0 var(--irwin-sp-5);
}

.card {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-6);
  box-shadow: var(--irwin-shadow-card);
}

.section-title,
.card-title {
  font-weight: var(--irwin-fw-black);
  letter-spacing: 0.005em;
}
.section-title { font-size: var(--irwin-fs-h2); color: var(--irwin-text); line-height: 1.25; margin-bottom: var(--irwin-sp-4); }
.card-title    { font-size: var(--irwin-fs-h3); line-height: var(--irwin-lh-snug); }

.section-label {
  font-size: var(--irwin-fs-label);
  font-weight: var(--irwin-fw-black);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--irwin-primary);
  margin-bottom: var(--irwin-sp-3);
}

/* Dashed vertical accent — toothbrushing motif from the book */
.dash-accent {
  display: inline-block;
  width: 3px;
  height: 32px;
  background: repeating-linear-gradient(
    to bottom,
    var(--irwin-accent) 0px,
    var(--irwin-accent) 5px,
    transparent 5px,
    transparent 9px
  );
  border-radius: 2px;
  vertical-align: middle;
  margin-right: var(--irwin-sp-2);
}

/* Orange CTA — works as <a> (.btn-download) or <button> (.btn-orange) */
.btn-orange,
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--irwin-sp-2);
  background: var(--irwin-accent);
  color: var(--irwin-on-accent);
  font-family: var(--irwin-font);
  font-weight: var(--irwin-fw-black);
  font-size: var(--irwin-fs-body-lg);
  padding: 14px 28px;
  border-radius: var(--irwin-radius-pill);
  text-decoration: none;
  transition: background var(--irwin-duration-base) var(--irwin-ease),
              transform var(--irwin-duration-fast) var(--irwin-ease),
              box-shadow var(--irwin-duration-base) var(--irwin-ease);
  box-shadow: var(--irwin-shadow-btn-orange);
}
.btn-orange { border: none; cursor: pointer; }
.btn-orange:hover,
.btn-download:hover {
  background: var(--irwin-accent-hover);
  transform: var(--irwin-lift-hover);
  box-shadow: var(--irwin-shadow-btn-orange-hover);
}
.btn-orange:active,
.btn-download:active { transform: translateY(0); }

.btn-blue {
  background: var(--irwin-primary);
  box-shadow: var(--irwin-shadow-btn-blue);
  width: 100%;
  justify-content: center;
}
.btn-blue:hover { background: var(--irwin-primary-hover); }

/* ── Irwin page layout (/irwin/** — uses site header/footer) ─── */

.book-detail {
  margin-top: 80px;
  padding: 60px 20px 80px;
  background: var(--irwin-bg);
  min-height: calc(100vh - 80px - 72px);
}

.book-detail .container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--irwin-sp-5);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--irwin-primary);
  font-weight: var(--irwin-fw-semibold);
  margin-bottom: 2rem;
  transition: color var(--irwin-duration-base) var(--irwin-ease);
}
.back-link:hover { color: var(--irwin-primary-hover); }

/* ── Book detail card (irwin/index.html) ─────────────────────── */

.book-detail-content {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  overflow: hidden;
  box-shadow: var(--irwin-shadow-card);
}

.book-detail-cover {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  background: var(--irwin-bg-panel);
}

.book-detail-info { padding: 2rem; }

.book-detail-info h1 {
  font-size: 2.5rem;
  font-weight: var(--irwin-fw-black);
  color: var(--irwin-primary);
  margin-bottom: 1rem;
}

.book-detail-info p {
  color: var(--irwin-text-muted);
  font-size: 1.1rem;
  line-height: var(--irwin-lh-body);
}

/* ── Page heroes ─────────────────────────────────────────────── */

.challenge-hero,
.game-hero,
.rewards-hero {
  text-align: center;
  padding: 2.5rem 0;
}

.challenge-hero h1,
.game-hero h1,
.rewards-hero h1 {
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: var(--irwin-fw-black);
  color: var(--irwin-primary);
  margin-bottom: var(--irwin-sp-2);
}

.challenge-hero .subtitle,
.game-hero .subtitle,
.rewards-hero .subtitle {
  color: var(--irwin-text-muted);
  font-size: 1.1rem;
  line-height: var(--irwin-lh-body);
  margin-bottom: var(--irwin-sp-5);
}

.game-hero .tagline {
  color: var(--irwin-text-muted);
  font-size: var(--irwin-fs-small);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--irwin-sp-5);
}

/* ── Info blocks ─────────────────────────────────────────────── */

.how-it-works,
.info-block,
.whats-next {
  background: var(--irwin-bg-panel);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-5) var(--irwin-sp-6);
  margin-bottom: var(--irwin-sp-5);
}

.how-it-works h2,
.info-block h2,
.whats-next h3 {
  font-size: var(--irwin-fs-h3);
  font-weight: var(--irwin-fw-bold);
  color: var(--irwin-text);
  margin-bottom: var(--irwin-sp-3);
}

.whats-next p {
  color: var(--irwin-text-muted);
  font-size: var(--irwin-fs-small);
  line-height: var(--irwin-lh-body);
  margin-bottom: var(--irwin-sp-4);
}

.whats-next a { color: var(--irwin-primary); font-weight: var(--irwin-fw-semibold); text-decoration: none; }
.whats-next a:hover { text-decoration: underline; }

/* ── Steps ───────────────────────────────────────────────────── */

.steps,
.steps-list,
.item-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.step,
.item {
  color: var(--irwin-text);
  font-size: var(--irwin-fs-small);
  padding-left: 1rem;
  position: relative;
}

.steps .step::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--irwin-primary);
}

.item::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--irwin-primary);
  font-weight: var(--irwin-fw-bold);
}

.steps-list { counter-reset: steps; gap: 0.6rem; }
.steps-list .step { padding-left: 2rem; counter-increment: steps; }
.steps-list .step::before {
  content: counter(steps) '.';
  position: absolute;
  left: 0;
  color: var(--irwin-primary);
  font-weight: var(--irwin-fw-semibold);
  min-width: 1.4rem;
}

/* ── Day / week grids ────────────────────────────────────────── */

.days-grid,
.weeks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--irwin-sp-3);
  margin-bottom: var(--irwin-sp-5);
}

.day-card,
.week-card {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-4) var(--irwin-sp-5);
  box-shadow: var(--irwin-shadow-card);
}

.day-card.final {
  grid-column: 1 / -1;
  background: rgba(var(--irwin-primary-rgb), 0.06);
  border-color: var(--irwin-primary);
}

.day-label,
.week-label {
  font-weight: var(--irwin-fw-bold);
  color: var(--irwin-primary);
  font-size: var(--irwin-fs-small);
  margin-bottom: var(--irwin-sp-1);
}

.irwin-says,
.week-desc { color: var(--irwin-text-muted); font-size: 0.875rem; line-height: 1.5; }
.irwin-says { font-style: italic; }

/* ── Special spaces (game board) ─────────────────────────────── */

.special-spaces {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--irwin-sp-3);
  margin-bottom: var(--irwin-sp-5);
}

.space-card {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-4) var(--irwin-sp-5);
  box-shadow: var(--irwin-shadow-card);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.space-icon { font-size: 1.4rem; line-height: 1; flex-shrink: 0; }
.space-text { font-size: var(--irwin-fs-small); color: var(--irwin-text); }
.space-text strong { display: block; font-weight: var(--irwin-fw-bold); margin-bottom: 0.2rem; }

/* ── Notices ─────────────────────────────────────────────────── */

.mystery-note,
.reward-note,
.parent-tip {
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-4) var(--irwin-sp-5);
  margin-bottom: var(--irwin-sp-8);
  color: var(--irwin-text-muted);
  font-size: var(--irwin-fs-small);
  line-height: var(--irwin-lh-body);
}

.mystery-note,
.reward-note { text-align: center; }

.mystery-note strong,
.reward-note strong,
.parent-tip strong { color: var(--irwin-text); font-weight: var(--irwin-fw-bold); }

.reward-note a { color: var(--irwin-primary); font-weight: var(--irwin-fw-semibold); text-decoration: none; }
.reward-note a:hover { text-decoration: underline; }

.download-cta { text-align: center; padding-bottom: var(--irwin-sp-4); }

/* ── Certificate card ────────────────────────────────────────── */

.certificate-card {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  box-shadow: var(--irwin-shadow-card);
  padding: var(--irwin-sp-8) var(--irwin-sp-6);
  text-align: center;
  margin: var(--irwin-sp-6) 0;
}

.level-badge {
  display: inline-block;
  background: rgba(var(--irwin-primary-rgb), 0.12);
  color: var(--irwin-primary);
  font-weight: var(--irwin-fw-bold);
  font-size: var(--irwin-fs-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--irwin-sp-1) var(--irwin-sp-3);
  border-radius: var(--irwin-radius-pill);
  margin-bottom: var(--irwin-sp-4);
}

.certificate-card h2 {
  font-size: var(--irwin-fs-h2);
  font-weight: var(--irwin-fw-black);
  color: var(--irwin-text);
  margin-bottom: 0.75rem;
}

.certificate-card p {
  color: var(--irwin-text-muted);
  font-size: var(--irwin-fs-small);
  line-height: var(--irwin-lh-body);
  max-width: 440px;
  margin: 0 auto var(--irwin-sp-6);
}

/* ── Hub layout (/bonus/ — standalone, no site header/footer) ── */

.hero {
  background: linear-gradient(180deg, var(--irwin-hero-bg-start) 0%, var(--irwin-hero-bg-mid) 60%, var(--irwin-hero-bg-end) 100%);
  display: flex;
  align-items: stretch;
  justify-content: center;
  overflow: hidden;
  height: 280px;
}

.hero-center {
  max-width: var(--irwin-container);
  width: 100%;
  padding: 0 var(--irwin-sp-5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--irwin-sp-6);
}

.hero-title {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: var(--irwin-fw-bold);
  letter-spacing: 0.005em;
  color: var(--irwin-hero-title);
  line-height: var(--irwin-lh-tight);
  text-shadow: 0 2px 0 rgba(255,255,255,0.4);
  text-wrap: balance;
  max-width: 520px;
  margin: 0;
  text-align: center;
}

.hero-dino {
  flex-shrink: 0;
  align-self: flex-end;
  width: clamp(120px, 18vw, 200px);
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.hero-dino img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: bottom center;
  display: block;
}

.section { padding: var(--irwin-sp-10) 0; }
.section-warm { background: transparent; }
.section-blue { background: var(--irwin-bg-panel); }

.section-intro {
  font-size: 1.05rem;
  color: var(--irwin-text);
  margin-bottom: var(--irwin-sp-6);
  line-height: var(--irwin-lh-body);
}

/* ── Free gift ───────────────────────────────────────────────── */

.gift-card { text-align: center; }
.gift-icon {
  width: 56px;
  height: 56px;
  background: var(--irwin-accent-lite);
  border-radius: var(--irwin-radius-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto var(--irwin-sp-4);
}
.gift-body {
  display: inline-flex;
  flex-direction: column;
  gap: var(--irwin-sp-3);
  align-items: stretch;
  text-align: left;
  width: 100%;
}
.gift-blurb { font-size: 1rem; color: var(--irwin-text-muted); line-height: var(--irwin-lh-body); margin: 0; padding: 0 0 6px; }
.gift-card .btn-orange { align-items: center; justify-content: center; text-align: center; }
.gift-meta {
  font-size: 0.85rem;
  color: var(--irwin-text-muted);
  margin-top: var(--irwin-sp-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--irwin-sp-2) var(--irwin-sp-4);
  justify-content: center;
  align-items: center;
}
.gift-meta-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--irwin-border); flex-shrink: 0; }

/* ── Email opt-in ────────────────────────────────────────────── */

.bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--irwin-sp-3);
  margin-bottom: var(--irwin-sp-5);
}
.bullets li {
  display: flex;
  align-items: center;
  gap: var(--irwin-sp-3);
  font-size: 1rem;
  font-weight: var(--irwin-fw-semibold);
  color: var(--irwin-text);
}
.bullet-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--irwin-primary); flex-shrink: 0; }

.form-group { display: flex; flex-direction: column; gap: var(--irwin-sp-3); margin-bottom: var(--irwin-sp-4); }
.form-row { display: flex; gap: var(--irwin-sp-3); }
.form-field { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.form-field label { font-size: 0.85rem; font-weight: var(--irwin-fw-bold); color: var(--irwin-text); }
.form-field input {
  font-family: var(--irwin-font);
  font-size: var(--irwin-fs-body);
  padding: 12px 16px;
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-input);
  outline: none;
  color: var(--irwin-text);
  background: var(--irwin-bg-white);
  width: 100%;
  transition: border-color var(--irwin-duration-base) var(--irwin-ease),
              box-shadow var(--irwin-duration-base) var(--irwin-ease);
}
.form-field input:focus { border-color: var(--irwin-primary); box-shadow: 0 0 0 3px rgba(var(--irwin-primary-rgb), 0.18); }
.form-field input::placeholder { color: var(--irwin-placeholder); }
.form-submit { text-align: center; }
.form-note { font-size: 0.82rem; color: var(--irwin-text-muted); margin-top: var(--irwin-sp-2); text-align: center; }
.form-status { font-size: 0.9rem; font-weight: var(--irwin-fw-semibold); margin-top: var(--irwin-sp-3); min-height: 1.4em; }
.form-status-success { color: var(--irwin-success); }
.form-status-error   { color: var(--irwin-error); }

/* ── Coming soon ─────────────────────────────────────────────── */

.coming-soon-card {
  background: var(--irwin-bg-white);
  border: 2px solid var(--irwin-border);
  border-radius: var(--irwin-radius-card);
  padding: var(--irwin-sp-6);
  display: flex;
  gap: var(--irwin-sp-6);
  align-items: center;
}
.coming-soon-text { flex: 1; }
.coming-soon-blurb { font-size: 1rem; color: var(--irwin-text-muted); line-height: var(--irwin-lh-body); margin-bottom: var(--irwin-sp-4); }
.coming-soon-cta { font-size: 0.9rem; padding: 11px 22px; }
.coming-soon-preview {
  flex-shrink: 0;
  width: 160px;
  height: 200px;
  border-radius: 10px;
  border: 2px solid var(--irwin-border);
  overflow: hidden;
  position: relative;
}
.coming-soon-preview-inner { width: 100%; height: 100%; }
.coming-soon-preview-inner img { width: 100%; height: 100%; object-fit: cover; display: block; }
.coming-soon-preview .cs-badge {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.5);
}
.cs-badge-pill {
  background: var(--irwin-accent);
  color: var(--irwin-on-accent);
  font-size: var(--irwin-fs-label);
  font-weight: var(--irwin-fw-black);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 7px 16px;
  border-radius: var(--irwin-radius-pill);
  box-shadow: 0 2px 10px rgba(var(--irwin-accent-rgb), 0.3);
}

/* ── Two-column ──────────────────────────────────────────────── */

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--irwin-sp-5); }
.two-col .card { display: flex; flex-direction: column; gap: var(--irwin-sp-3); }
.card-emoji { font-size: 1.4rem; }
.card-stars { font-size: 1.4rem; display: flex; gap: 2px; }
.card-body { font-size: 0.95rem; color: var(--irwin-text-muted); line-height: var(--irwin-lh-body); flex: 1; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--irwin-primary);
  font-weight: var(--irwin-fw-black);
  font-size: var(--irwin-fs-small);
  text-decoration: none;
  transition: color var(--irwin-duration-base) var(--irwin-ease);
  margin-top: auto;
}
.card-link:hover { color: var(--irwin-primary-hover); }
.card-link svg { transition: transform 0.2s ease; }
.card-link:hover svg { transform: translateX(3px); }
.two-col .btn-orange { font-size: 0.9rem; padding: 11px 22px; align-self: flex-start; margin-top: auto; }

/* ── Hub footer ──────────────────────────────────────────────── */

.hub-footer { background: var(--irwin-primary); padding: 28px var(--irwin-sp-5); text-align: center; }
.hub-footer-text { font-size: 1rem; color: var(--irwin-on-primary); }
.hub-footer-text a {
  color: var(--irwin-on-primary);
  font-weight: var(--irwin-fw-bold);
  text-decoration: underline;
  text-underline-offset: 3px;
  opacity: 0.85;
}
.hub-footer-text a:hover { opacity: 1; }

/* ── Responsive ──────────────────────────────────────────────── */

@media (max-width: 768px) {
  .book-detail { padding: 40px 20px 60px; }
  .book-detail-info h1 { font-size: 2rem; }
  .book-detail-info p { font-size: 1rem; }
}

@media (max-width: 640px) {
  .hero { height: auto; padding-top: var(--irwin-sp-6); }
  .hero-center { flex-direction: column; gap: var(--irwin-sp-4); }
  .hero-dino { width: 140px; height: 180px; align-self: center; }
  .hero-title { font-size: 1.55rem; }
  .two-col { grid-template-columns: 1fr; }
  .coming-soon-card { flex-direction: column; }
  .coming-soon-preview { width: 100%; height: 140px; }
  .form-row { flex-direction: column; }
  .section-title { font-size: 1.4rem; }
}

@media (max-width: 600px) {
  .days-grid,
  .weeks-grid,
  .special-spaces { grid-template-columns: 1fr; }
  .day-card.final { grid-column: auto; }
  .certificate-card { padding: var(--irwin-sp-6) var(--irwin-sp-4); }
  .certificate-card h2 { font-size: 1.5rem; }
  .how-it-works,
  .info-block,
  .whats-next { padding: var(--irwin-sp-4) var(--irwin-sp-5); }
}

@media (max-width: 480px) {
  .book-detail-info h1 { font-size: 1.8rem; }
}