/* ===========
   Brand system
   =========== */

:root {
  /* Colors */
  --ism-ink:        #1B2942;
  --ism-ink-soft:   #2C3E5C;
  --ism-paper:      #F6F1E4;
  --ism-paper-dim:  #EFE8D6;
  --ism-line:       #DCD3B8;
  --ism-gold:       #D4A548;
  --ism-gold-dark:  #B8862F;
  --ism-teal:       #3E7C7B;
  --ism-coral:      #C85A46;

  /* Typography scale (tweak to match mockup) */
  --ism-font-size-body: 16px;
  --ism-font-size-sm:   14px;
  --ism-font-size-lg:   20px;
  --ism-font-size-h1:   40px;
  --ism-font-size-h2:   30px;
  --ism-font-size-h3:   22px;

  /* Spacing */
  --ism-space-xs: 0.5rem;
  --ism-space-sm: 1rem;
  --ism-space-md: 1.5rem;
  --ism-space-lg: 2.5rem;
  --ism-space-xl: 3.5rem;
}

/* ===========
   Global base
   =========== */

html {
  box-sizing: border-box;
}

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

body.ism-body {
  margin: 0;
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-size: var(--ism-font-size-body);
  line-height: 1.6;
  background-color: var(--ism-paper);
  color: var(--ism-ink-soft);
}

/* Links & buttons */

a {
  color: var(--ism-gold-dark);
  text-decoration: none;
}

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

.ism-button {
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 3px;
  padding: 0.75rem 1.5rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.ism-button--primary {
  background-color: var(--ism-gold-dark);
  color: var(--ism-paper);
}

.ism-button--primary:hover {
  background-color: var(--ism-ink);
  color: var(--ism-paper);
}

.ism-button--on-gold {
  /* tweak if needed for contrast on gold band */
}

.ism-link--ghost {
    font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
  text-decoration: underline;
  color: var(--ism-ink-soft);
  margin-left: var(--ism-space-sm);
  padding: 0.25rem 0;
}

.ism-link--ghost:hover {
  color: var(--ism-teal);
}

/* Eyebrow labels */

.ism-eyebrow {
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ism-eyebrow--mono {
  color: var(--ism-ink-soft);
}

.ism-eyebrow--teal {
  color: var(--ism-teal);
}

.ism-eyebrow--light {
  color: var(--ism-paper);
}

.ism-eyebrow--dark {
  color: var(--ism-ink);
}

/* Containers & layout utilities */

.ism-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--ism-space-md);
}

.ism-page {
  min-height: 100vh;
}

.ism-page--home {
  padding-bottom: var(--ism-space-xl);
}

/* Generic grid helper for offers and packages */

.ism-grid {
  display: grid;
  gap: var(--ism-space-md);
}

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

@media (max-width: 900px) {
  .ism-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .ism-grid--3 {
    grid-template-columns: 1fr;
  }
}

/* Card base */

.ism-card {
  background-color: var(--ism-paper);
  border: 1px solid var(--ism-line);
  border-radius: 6px;
  padding: var(--ism-space-md);
  position: relative;
  transition: box-shadow 0.18s ease, transform 0.18s ease, background-color 0.18s ease;
}

.ism-card--offer:hover,
.ism-card--package:hover {
  background-color: var(--ism-paper-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(27, 41, 66, 0.12);
}

.ism-card__title {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h3);
  font-weight: 600;
  color: var(--ism-ink);
  margin: 0 0 var(--ism-space-xs);
}

.ism-card__body {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ism-ink-soft);
}

/* ===========
   Header / Nav
   =========== */

.ism-header {
  padding: var(--ism-space-sm) 0;
  background-color: var(--ism-paper);
}

.ism-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ism-header__logo {
  max-height: 40px;
}

.ism-header__brand {
  font-family: "Fraunces", "Georgia", serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ism-ink);
}

.ism-header__right {
  display: flex;
  align-items: center;
  gap: var(--ism-space-md);
}

.ism-header__nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--ism-space-sm);
}

.ism-header__nav-link {
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ism-ink);
}

.ism-header__nav-link:hover {
  color: var(--ism-teal);
}

.ism-header__cta {
  /* primary nav button */
}

/* ===========
   Hero section
   =========== */

.ism-hero {
  padding: var(--ism-space-xl) 0 var(--ism-space-lg);
}

.ism-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1.4fr);
  gap: var(--ism-space-lg);
  align-items: center;
}

@media (max-width: 900px) {
  .ism-hero__inner {
    grid-template-columns: 1fr;
  }
}

.ism-hero__headline {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h1);
  font-weight: 600;
  color: var(--ism-ink);
  margin: var(--ism-space-sm) 0 var(--ism-space-xs);
}

.ism-hero__subheadline {
  font-size: var(--ism-font-size-lg);
  color: var(--ism-ink-soft);
  margin: 0 0 var(--ism-space-sm);
}

.ism-hero__intro {
  font-size: 0.98rem;
  color: var(--ism-ink-soft);
  margin-bottom: var(--ism-space-md);
}

.ism-hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.ism-hero__col--right {
  position: relative;
}

/* Chalkboard panel */

.ism-chalkboard {
  position: relative;
  background-color: var(--ism-ink);
  border-radius: 12px;
  overflow: hidden;
  padding: var(--ism-space-lg);
  color: var(--ism-paper);
}

.ism-chalkboard__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}

.ism-chalkboard__content {
  position: relative;
  font-family: "JetBrains Mono", "SF Mono", monospace;
  display: flex;
  flex-direction: column;
  gap: var(--ism-space-md);
}

.ism-chalkboard__equation {
  font-size: 1.1rem;
}

.ism-chalkboard__result {
  display: inline-flex;
  align-items: center;
  gap: var(--ism-space-xs);
  font-size: 0.95rem;
}

.ism-chalkboard__checkmark {
  font-size: 1.3rem;
  color: var(--ism-gold);
}

/* ===========
   Subject ticker
   =========== */

.ism-ticker {
  margin: 0;
  padding: var(--ism-space-xs) 0;
  background-color: var(--ism-ink);
  color: var(--ism-paper);
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.8rem;
}

.ism-ticker__inner {
  overflow: hidden;
}

.ism-ticker__track {
  display: inline-flex;
  gap: var(--ism-space-md);
  white-space: nowrap;
  /* Two copies of the items, so we move by half */
  animation: ism-ticker-scroll 24s linear infinite;
}

.ism-ticker__item::after {
  content: "•";
  margin-left: var(--ism-space-xs);
  color: var(--ism-gold);
}

@keyframes ism-ticker-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ===========
   Offers grid
   =========== */

.ism-offers {
  padding: var(--ism-space-lg) 0 var(--ism-space-xl);
}

.ism-offers__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--ism-space-md);
}

@media (max-width: 1100px) {
  .ism-offers__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .ism-offers__grid {
    grid-template-columns: 1fr;
  }
}

/* ===========
   Who I Work With band
   =========== */

.ism-band {
  padding: var(--ism-space-lg) 0;
}

.ism-band--who {
  background-color: var(--ism-ink);
  color: var(--ism-paper);
}

.ism-band__headline {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h2);
  font-weight: 600;
  margin: var(--ism-space-xs) 0 var(--ism-space-xs);
}

.ism-band__intro {
  margin: 0 0 var(--ism-space-md);
  font-size: 0.95rem;
}

/* Number line */

.ism-numberline {
  margin-top: var(--ism-space-md);
  position: relative;
  padding-top: var(--ism-space-sm);
}

.ism-numberline__axis {
  height: 2px;
  background-color: var(--ism-paper);
  position: relative;
}

.ism-numberline__ticks {
  list-style: none;
  padding: 0;
  margin: var(--ism-space-sm) 0 0;
  display: flex;
  justify-content: space-between;
}

.ism-numberline__tick {
  text-align: center;
  flex: 1 1 auto;
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.8rem;
}

.ism-numberline__marker {
  display: block;
  width: 2px;
  height: 14px;
  margin: 0 auto var(--ism-space-xs);
  background-color: var(--ism-paper);
}

.ism-numberline__label {
  display: block;
}

/* ===========
   Why I Speak Math
   =========== */

.ism-section {
  padding: var(--ism-space-xl) 0;
}

.ism-section__header {
  margin-bottom: var(--ism-space-md);
}

.ism-section__headline {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h2);
  font-weight: 600;
  color: var(--ism-ink);
  margin: var(--ism-space-xs) 0;
}

.ism-section__cols {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.4fr);
  gap: var(--ism-space-lg);
}

@media (max-width: 900px) {
  .ism-section__cols {
    grid-template-columns: 1fr;
  }
}

/* Translation card */

.ism-translation-card {
  background-color: var(--ism-paper);
  border: 1px solid var(--ism-line);
  border-radius: 8px;
  padding: var(--ism-space-md);
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.85rem;
}

.ism-translation-card__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: var(--ism-space-xs);
  align-items: center;
  padding: var(--ism-space-xs) 0;
  border-bottom: 1px dashed var(--ism-line);
}

.ism-translation-card__row:last-child {
  border-bottom: none;
}

.ism-translation-card__from {
  color: var(--ism-ink-soft);
}

.ism-translation-card__arrow {
  color: var(--ism-coral);
  text-align: center;
}

.ism-translation-card__to {
  color: var(--ism-ink);
}

/* Philosophy / pull quote */

.ism-pullquote {
  font-family: "Fraunces", "Georgia", serif;
  font-style: italic;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ism-ink);
  margin: 0 0 var(--ism-space-md);
}

.ism-section__body {
  font-size: 0.98rem;
  color: var(--ism-ink-soft);
}

/* ===========
   Final CTA band
   =========== */

.ism-band--final-cta {
  background-color: var(--ism-gold);
  color: var(--ism-ink);
  text-align: center;
}

.ism-band__inner--center {
  text-align: center;
}

.ism-band--final-cta .ism-band__headline {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h2);
  font-weight: 600;
  margin-bottom: var(--ism-space-sm);
}

/* ===========
   Footer
   =========== */

.ism-footer {
  background-color: var(--ism-ink);
  color: var(--ism-paper);
  padding: var(--ism-space-lg) 0 var(--ism-space-md);
  margin-top: var(--ism-space-xl);
}

.ism-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: var(--ism-space-lg);
  align-items: flex-start;
  flex-wrap: wrap;
}

.ism-footer__logo {
  max-height: 32px;
  margin-bottom: var(--ism-space-xs);
}

.ism-footer__tagline {
  margin: 0;
  font-size: 0.9rem;
}

.ism-footer__nav-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--ism-space-xs);
  display: flex;
  flex-wrap: wrap;
  gap: var(--ism-space-xs);
}

.ism-footer__nav-link {
  font-size: 0.85rem;
  color: var(--ism-paper);
}

.ism-footer__nav-link:hover {
  color: var(--ism-teal);
}

.ism-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
}

.ism-footer__bottom {
  text-align: center;
  margin-top: var(--ism-space-md);
}

.ism-footer__copy {
  font-size: 0.8rem;
  color: rgba(246, 241, 228, 0.8);
}

/* ===========
   Responsive tweaks
   =========== */

@media (max-width: 768px) {
  .ism-header__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--ism-space-sm);
  }

  .ism-header__right {
    width: 100%;
    justify-content: space-between;
  }

  .ism-hero {
    padding-top: var(--ism-space-lg);
  }
}

/* Payment hero */

.ism-section--payment-hero {
  padding: var(--ism-space-xl) 0 var(--ism-space-lg);
}

.ism-section--payment-hero .ism-section__headline {
  font-family: "Fraunces", "Georgia", serif;
  font-size: var(--ism-font-size-h2);
  font-weight: 600;
  color: var(--ism-ink);
}

.ism-section__subheadline {
  font-size: 1rem;
  color: var(--ism-ink-soft);
  margin: 0 0 var(--ism-space-md);
}

/* Payment details & FAQ */

.ism-section--payment-details {
  padding: var(--ism-space-lg) 0 var(--ism-space-xl);
}

.ism-section--payment-details .ism-section__cols {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.2fr);
  gap: var(--ism-space-lg);
}

@media (max-width: 900px) {
  .ism-section--payment-details .ism-section__cols {
    grid-template-columns: 1fr;
  }
}

.ism-faq__item {
  border-bottom: 1px solid var(--ism-line);
  padding: var(--ism-space-sm) 0;
}

.ism-faq__item:last-child {
  border-bottom: none;
}

.ism-faq__question {
  font-family: "Fraunces", "Georgia", serif;
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 var(--ism-space-xs);
  color: var(--ism-ink);
}

.ism-faq__answer {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ism-ink-soft);
}

/* Contact hero & main */

.ism-section--contact-hero {
  padding: var(--ism-space-xl) 0 var(--ism-space-lg);
}

.ism-section--contact-main {
  padding: var(--ism-space-lg) 0 var(--ism-space-xl);
}

.ism-section--contact-main .ism-section__cols {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.2fr);
  gap: var(--ism-space-lg);
}

@media (max-width: 900px) {
  .ism-section--contact-main .ism-section__cols {
    grid-template-columns: 1fr;
  }
}

/* Contact form */

.ism-form {
  display: grid;
  gap: var(--ism-space-sm);
}

.ism-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.ism-form__field label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ism-ink);
}

.ism-form__field input,
.ism-form__field textarea {
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  padding: 0.6rem 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--ism-line);
  background-color: var(--ism-paper);
  color: var(--ism-ink-soft);
}

.ism-form__field input:focus,
.ism-form__field textarea:focus {
  outline: 2px solid var(--ism-teal);
  border-color: var(--ism-teal);
}

.ism-contact-info p {
  margin: 0 0 0.4rem;
  font-size: 0.9rem;
}

.ism-contact-closing {
  margin-top: var(--ism-space-md);
  font-size: 0.95rem;
}

/* Header nav links */

.ism-header__nav-list a {
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ism-ink); /* bluish Ink */
  text-decoration: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
}

.ism-header__nav-list a:hover {
  color: var(--ism-teal);
  border-bottom-color: var(--ism-teal); /* underline effect */
}