/* =========================================================
   DekoArte — Coastal Modern Stylesheet
   Palette: Sand & Seafoam
   ========================================================= */

:root {
  --sand-50:  #faf6f0;
  --sand-100: #f4ecdf;
  --sand-200: #e8dec6;
  --sand-300: #d6c6a3;
  --driftwood: #b8a589;
  --driftwood-dark: #8a7762;

  --foam-50:  #eef4f0;
  --foam-100: #d4e3dc;
  --foam-300: #8fb5a3;
  --foam-500: #5a8775;
  --foam-700: #3d6356;

  --ink:        #1f2622;
  --ink-soft:   #3a423d;
  --ink-muted:  #6f766f;
  --line:       #e2d9c8;

  --shadow-sm: 0 1px 3px rgba(60, 50, 30, 0.06);
  --shadow-md: 0 8px 24px rgba(60, 50, 30, 0.08);
  --shadow-lg: 0 24px 60px rgba(60, 50, 30, 0.12);

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;

  --max-w: 1200px;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--sand-50);
  min-height: 100vh;
}

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

a { color: var(--foam-700); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--foam-500); }

h1, h2, h3, h4, h5 {
  font-family: 'Cormorant Garamond', 'Times New Roman', serif;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.18;
}
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.9rem, 3.4vw, 3rem); margin-bottom: 0.6rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h4 { font-size: 1.15rem; font-family: 'Inter', sans-serif; font-weight: 600; letter-spacing: 0.02em; }

p { margin-bottom: 1rem; }

.eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--foam-500);
  font-weight: 500;
  margin-bottom: 0.8rem;
  display: inline-block;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 246, 240, 0.88);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}
.brand {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.7rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.brand span { color: var(--foam-500); font-style: italic; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 1.6rem;
  color: var(--ink);
  cursor: pointer;
}
.nav-list {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav-list a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
}
.nav-list a:hover { color: var(--foam-700); }
.nav-list a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 1px;
  background: var(--foam-500);
}

/* ============ Buttons ============ */
.btn {
  display: inline-block;
  padding: 0.95rem 2rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}
.btn-primary {
  background: var(--foam-700);
  color: var(--sand-50);
}
.btn-primary:hover {
  background: var(--ink);
  color: var(--sand-50);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--driftwood);
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--sand-50);
  border-color: var(--ink);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(180deg, rgba(250,246,240,0.55) 0%, rgba(212,227,220,0.6) 100%),
    radial-gradient(ellipse at 30% 20%, var(--sand-100) 0%, var(--foam-100) 90%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 85% 60%, rgba(143,181,163,0.18) 0%, transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(216,198,163,0.25) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}
.hero h1 {
  margin-bottom: 1.4rem;
}
.hero h1 em {
  font-style: italic;
  color: var(--foam-500);
}
.hero .lede {
  font-size: 1.18rem;
  color: var(--ink-soft);
  max-width: 32em;
  margin-bottom: 2rem;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-art {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--foam-100) 0%, var(--sand-200) 100%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.6s ease;
}
.hero-art:hover img {
  transform: scale(1.04);
}
.hero-art::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, transparent 50%, rgba(10,30,20,0.55) 100%);
  z-index: 1;
  pointer-events: none;
}
.hero-art-mark {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  right: 2rem;
  color: rgba(255,255,255,0.92);
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 1.4rem;
  z-index: 2;
  letter-spacing: 0.02em;
}

/* ============ Sections ============ */
.section {
  padding: 6rem 0;
}
.section-tight { padding: 4rem 0; }
.section-foam {
  background: linear-gradient(180deg, var(--foam-50) 0%, var(--sand-50) 100%);
}
.section-sand {
  background: var(--sand-100);
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}
.section-header p {
  color: var(--ink-muted);
  font-size: 1.05rem;
}
.divider {
  width: 56px;
  height: 1px;
  background: var(--driftwood);
  margin: 1rem auto 1.4rem;
}

/* ============ Cards / Grids ============ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
}

.service-card {
  background: var(--sand-50);
  border: 1px solid var(--line);
  padding: 2.4rem 2rem;
  border-radius: var(--radius-md);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--foam-300);
}
.service-card .icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--foam-100);
  color: var(--foam-700);
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.4rem;
  font-style: italic;
}
.service-card h3 { margin-bottom: 0.5rem; }
.service-card p { color: var(--ink-muted); font-size: 0.96rem; margin: 0; }

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.portfolio-item {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background: var(--sand-200);
}
.portfolio-item img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.portfolio-item:hover img {
  transform: scale(1.06);
}
.portfolio-item .label {
  position: absolute;
  left: 1.2rem;
  bottom: 1.2rem;
  right: 1.2rem;
  color: var(--sand-50);
  z-index: 2;
}
.portfolio-item .label small {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  opacity: 0.85;
  margin-bottom: 0.3rem;
}
.portfolio-item .label strong {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: 0;
}
.portfolio-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.65) 100%);
  z-index: 1;
  transition: opacity 0.3s ease;
}
.portfolio-item:hover::after {
  opacity: 0.85;
}

/* Distinct swatches for portfolio placeholders */
.swatch-1 { background: linear-gradient(160deg, #d4e3dc, #8fb5a3); }
.swatch-2 { background: linear-gradient(160deg, #f4ecdf, #d6c6a3); }
.swatch-3 { background: linear-gradient(160deg, #eef4f0, #b8a589); }
.swatch-4 { background: linear-gradient(160deg, #f0e9dc, #5a8775); }
.swatch-5 { background: linear-gradient(160deg, #d6c6a3, #3d6356); }
.swatch-6 { background: linear-gradient(160deg, #e8dec6, #8fb5a3); }

/* ============ Two-column feature ============ */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.feature-art {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--sand-200), var(--foam-100));
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.feature-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.feature-art:hover img {
  transform: scale(1.04);
}
.feature h2 { margin-bottom: 1.2rem; }
.feature p { color: var(--ink-muted); margin-bottom: 1rem; }

/* ============ Quote / Testimonial ============ */
.quote-block {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}
.quote-block blockquote {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  font-style: italic;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 1.4rem;
}
.quote-block cite {
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.8rem;
  color: var(--foam-700);
}

/* ============ Forms ============ */
.form {
  display: grid;
  gap: 1.2rem;
  max-width: 640px;
}
.form .row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}
.form label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
  font-weight: 500;
}
.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--sand-50);
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-color: var(--foam-300);
  box-shadow: 0 0 0 3px rgba(143,181,163,0.18);
}
.form textarea { min-height: 160px; resize: vertical; }

.form-note {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 0.4rem;
}
.form-success {
  background: var(--foam-100);
  border: 1px solid var(--foam-300);
  color: var(--foam-700);
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  display: none;
}
.form-success.show { display: block; }

/* ============ Contact info block ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
}
.contact-info {
  background: var(--sand-100);
  padding: 2.4rem;
  border-radius: var(--radius-md);
}
.contact-info h3 { margin-bottom: 0.4rem; }
.contact-info dl { display: grid; gap: 1.2rem; margin-top: 1.4rem; }
.contact-info dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--foam-700);
  margin-bottom: 0.25rem;
}
.contact-info dd { color: var(--ink); font-size: 1.02rem; }

/* ============ Footer ============ */
.site-footer {
  background: var(--ink);
  color: var(--sand-100);
  padding: 4rem 0 2rem;
}
.site-footer .container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}
.site-footer h4 {
  color: var(--sand-50);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.site-footer ul { list-style: none; }
.site-footer ul a {
  color: var(--sand-200);
  font-size: 0.94rem;
  display: inline-block;
  padding: 0.25rem 0;
}
.site-footer ul a:hover { color: var(--foam-300); }
.site-footer .brand { color: var(--sand-50); font-size: 1.6rem; }
.site-footer .legal {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 3rem;
  padding-top: 1.6rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--ink-muted);
  grid-column: 1 / -1;
}

/* ============ Education area ============ */
.edu-bg {
  background:
    linear-gradient(180deg, var(--foam-50) 0%, var(--sand-50) 60%);
  min-height: 100vh;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background:
    radial-gradient(ellipse at 70% 30%, var(--foam-100) 0%, var(--sand-100) 60%, var(--sand-50) 100%);
}
.login-card {
  background: var(--sand-50);
  border: 1px solid var(--line);
  padding: 3rem 2.6rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 440px;
  text-align: center;
}
.login-card .brand { display: block; margin-bottom: 0.4rem; }
.login-card .eyebrow { color: var(--driftwood-dark); margin-bottom: 1.6rem; }
.login-card h1 {
  font-size: 1.8rem;
  margin-bottom: 0.8rem;
}
.login-card p { color: var(--ink-muted); margin-bottom: 1.8rem; }
.login-card .form { gap: 1rem; }
.login-card .btn { width: 100%; }
.login-error {
  background: #fdecea;
  border: 1px solid #e8b4ad;
  color: #8c2419;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
  text-align: left;
}
.login-error.show { display: block; }
.login-help {
  margin-top: 1.6rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

/* Education shared header */
.edu-header {
  background: var(--ink);
  color: var(--sand-100);
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  z-index: 60;
}
.edu-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.edu-header .brand { color: var(--sand-50); font-size: 1.4rem; }
.edu-header .brand span { color: var(--foam-300); }
.edu-header nav { display: flex; gap: 1.5rem; align-items: center; }
.edu-header nav a {
  color: var(--sand-200);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.edu-header nav a:hover { color: var(--foam-300); }
.edu-header .logout {
  background: transparent;
  color: var(--sand-200);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
}
.edu-header .logout:hover { background: rgba(255,255,255,0.08); color: var(--sand-50); }

.edu-hero {
  background: linear-gradient(135deg, var(--ink) 0%, var(--foam-700) 100%);
  color: var(--sand-100);
  padding: 4rem 0 3rem;
}
.edu-hero h1 { color: var(--sand-50); }
.edu-hero p { color: var(--sand-200); max-width: 60ch; }
.edu-hero .stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2.4rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.stat-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.4rem;
  color: var(--foam-300);
}
.stat-lbl {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--sand-200);
}

/* Phase / month grid */
.phase {
  margin-bottom: 3rem;
}
.phase-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.8rem;
  margin-bottom: 1.6rem;
}
.phase-head h2 { font-size: 1.7rem; margin: 0; }
.phase-head .phase-tag {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--foam-700);
  font-weight: 500;
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.month-card {
  background: var(--sand-50);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  display: block;
  transition: all 0.25s ease;
  position: relative;
}
.month-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--foam-300);
}
.month-card .num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.6rem;
  color: var(--foam-500);
  line-height: 1;
}
.month-card h3 {
  margin: 0.4rem 0 0.3rem;
  font-size: 1.15rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--ink);
}
.month-card .division {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-bottom: 0.8rem;
}
.month-card .meta {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--driftwood-dark);
}
.month-card .exam-flag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--foam-100);
  color: var(--foam-700);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  font-weight: 500;
}

/* Month detail */
.week-block {
  background: var(--sand-50);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-bottom: 2rem;
}
.week-block h3 {
  margin-bottom: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.week-block .sprint-goal {
  color: var(--foam-700);
  font-style: italic;
  margin-bottom: 1.4rem;
  border-left: 2px solid var(--foam-300);
  padding-left: 1rem;
}

.day-list { display: grid; gap: 0.5rem; }
.day-row {
  display: grid;
  grid-template-columns: 80px 1fr 100px;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: var(--sand-100);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink);
  border: 1px solid transparent;
  transition: all 0.2s;
}
.day-row:hover {
  background: var(--foam-50);
  border-color: var(--foam-300);
  color: var(--ink);
}
.day-row .day-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.4rem;
  color: var(--foam-500);
}
.day-row .day-num small {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
}
.day-row .day-topic { font-size: 0.96rem; }
.day-row .day-topic small {
  display: block;
  color: var(--ink-muted);
  font-size: 0.78rem;
  margin-top: 0.2rem;
}
.day-row .day-time {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--driftwood-dark);
  text-align: right;
}
.day-row.has-lesson .day-num small { color: var(--foam-700); }

/* Lesson page */
.lesson-shell { padding: 3rem 0 5rem; }
.lesson-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2.4rem;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--line);
}
.lesson-meta div small {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--foam-700);
  margin-bottom: 0.25rem;
}
.lesson-meta div strong {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 600;
}
.lesson-shell h1 { margin-bottom: 1rem; }
.lesson-shell h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--foam-700);
  margin-top: 2.6rem;
  margin-bottom: 1rem;
}
.lesson-shell p, .lesson-shell li { color: var(--ink-soft); }
.lesson-shell ul, .lesson-shell ol { padding-left: 1.4rem; margin-bottom: 1.2rem; }
.lesson-shell li { margin-bottom: 0.4rem; }

.callout {
  background: var(--foam-50);
  border-left: 3px solid var(--foam-500);
  padding: 1.2rem 1.4rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.6rem 0;
}
.callout strong { color: var(--foam-700); }

.lesson-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  gap: 1rem;
  flex-wrap: wrap;
}
.lesson-nav a {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}
.lesson-nav a:hover { color: var(--foam-700); }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero { min-height: auto; padding: 4rem 0; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2, .feature { grid-template-columns: 1fr; gap: 2rem; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .month-grid { grid-template-columns: 1fr 1fr; }
  .site-footer .container { grid-template-columns: 1fr 1fr; }
  .edu-hero .stats { grid-template-columns: 1fr 1fr; gap: 1.4rem; }
}

@media (max-width: 640px) {
  .container { padding: 0 1.25rem; }
  .section { padding: 4rem 0; }
  .nav-toggle { display: block; }
  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--sand-50);
    border-bottom: 1px solid var(--line);
    padding: 1rem 2rem;
  }
  .nav-list.open { display: flex; }
  .nav-list li { width: 100%; }
  .nav-list a { display: block; padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
  .grid-3, .portfolio-grid, .month-grid { grid-template-columns: 1fr; }
  .form .row-2 { grid-template-columns: 1fr; }
  .site-footer .container { grid-template-columns: 1fr; }
  .day-row { grid-template-columns: 60px 1fr; }
  .day-row .day-time { grid-column: 2; text-align: left; padding-left: 0; }
  .edu-hero .stats { grid-template-columns: 1fr 1fr; }
}

/* ============ Utilities ============ */
.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; } .mb-4 { margin-bottom: 2rem; }
.muted { color: var(--ink-muted); }