/* Cloud Backend Career Certification Hub — coastal editorial theme */

:root {
  --color-chalk: #f7f5f1;
  --color-ivory: #f3efe6;
  --color-sand: #d8cfc0;
  --color-teal: #4a8b85;
  --color-teal-deep: #3a716c;
  --color-navy: #1b2a4a;
  --color-navy-soft: #2a3d64;
  --color-coral: #e07a5f;
  --color-text: #243044;
  --color-muted: #5c677a;
  --color-white: #ffffff;
  --font-serif: "Noto Serif TC", "Songti TC", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", sans-serif;
  --radius-card: 14px;
  --radius-pill: 999px;
  --shadow-soft: 0 12px 28px rgba(27, 42, 74, 0.12);
  --header-h: 4.25rem;
  --space: clamp(1rem, 2.5vw, 2rem);
  --max: 72rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text);
  background:
    radial-gradient(ellipse at 10% 0%, rgba(74, 139, 133, 0.08), transparent 45%),
    radial-gradient(ellipse at 90% 10%, rgba(224, 122, 95, 0.06), transparent 40%),
    linear-gradient(180deg, var(--color-chalk) 0%, #eef2ef 48%, var(--color-chalk) 100%);
  min-height: 100vh;
}

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

a {
  color: var(--color-teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-navy);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-navy);
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  width: min(100% - 2 * var(--space), var(--max));
  margin-inline: auto;
}

.section {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.section--tight {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.section__eyebrow {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: 0.75rem;
}

.section__lead {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 40rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.45rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.35s ease, box-shadow 0.35s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(27, 42, 74, 0.18);
}

.btn--navy {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn--navy:hover {
  color: var(--color-white);
  background: var(--color-navy-soft);
}

.btn--teal {
  background: var(--color-teal);
  color: var(--color-white);
}

.btn--teal:hover {
  color: var(--color-white);
  background: var(--color-teal-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn--ghost:hover {
  color: var(--color-navy);
  background: rgba(255, 255, 255, 0.5);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Cards */
.card {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.35), transparent 40%),
    var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.22);
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.card__body {
  position: relative;
  padding: 1.35rem 1.4rem 1.5rem;
}

.card__img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
  width: 100%;
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: 0.4rem;
}

.card__text {
  color: var(--color-muted);
  font-size: 0.98rem;
  margin-bottom: 0.85rem;
}

.card__link {
  font-weight: 500;
  text-decoration: none;
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-coral);
}

.card-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(247, 245, 241, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(27, 42, 74, 0.08);
}

.site-header__inner {
  width: min(100% - 2 * var(--space), var(--max));
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--color-navy);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
}

.site-header__mark {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--color-coral);
  box-shadow: 0 0 0 4px rgba(74, 139, 133, 0.25);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.site-header__nav a {
  text-decoration: none;
  color: var(--color-navy);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.site-header__nav a:hover {
  color: var(--color-teal-deep);
}

.site-header__cta {
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-pill);
  background: var(--color-navy);
  color: var(--color-white) !important;
}

.site-header__cta:hover {
  background: var(--color-navy-soft);
}

.site-header__toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(27, 42, 74, 0.2);
  border-radius: 0.6rem;
  background: var(--color-ivory);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.28rem;
}

.site-header__toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--color-navy);
}

@media (max-width: 920px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem var(--space) 1.25rem;
    background: rgba(247, 245, 241, 0.97);
    border-bottom: 1px solid rgba(27, 42, 74, 0.1);
    display: none;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav a {
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid rgba(27, 42, 74, 0.06);
  }

  .site-header__cta {
    margin-top: 0.5rem;
    text-align: center;
  }
}

/* Footer */
.site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.86);
  margin-top: 3rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__coral {
  height: 3px;
  background: linear-gradient(90deg, var(--color-coral), #f0a48f, var(--color-coral));
}

.site-footer__inner {
  width: min(100% - 2 * var(--space), var(--max));
  margin-inline: auto;
  padding: 3.5rem 0 2rem;
}

.site-footer__cta-block {
  max-width: 36rem;
  margin-bottom: 2.75rem;
}

.site-footer__cta-title {
  font-family: var(--font-serif);
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

.site-footer__cta-text {
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 1.25rem;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.site-footer__heading {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: 0.9rem;
}

.site-footer__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__list li {
  margin-bottom: 0.45rem;
}

.site-footer__contact {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 0.45rem;
}

.site-footer__social {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.site-footer__social a {
  opacity: 0.65;
}

.site-footer__social a:hover {
  opacity: 1;
}

.site-footer__copy {
  margin-top: 2.5rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 800px) {
  .site-footer__cols {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .site-footer__cols {
    grid-template-columns: 1fr;
  }
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: 200;
  max-width: 36rem;
  margin-inline: auto;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.25);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  padding: 1.15rem 1.25rem;
}

.cookie-banner[hidden] {
  display: none !important;
}

.cookie-banner__text {
  font-size: 0.92rem;
  margin-bottom: 0.9rem;
  color: var(--color-text);
}

.cookie-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.cookie-banner__error {
  color: #9b2c2c;
  font-size: 0.85rem;
  margin: 0.6rem 0 0;
}

/* Hero home — asymmetrical split */
.hero-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
}

.hero-split__copy {
  padding-bottom: 1rem;
}

.hero-split__brand {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  line-height: 1.15;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
}

.hero-split__headline {
  font-family: var(--font-sans);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 500;
  color: var(--color-teal-deep);
  margin-bottom: 1rem;
  max-width: 28rem;
}

.hero-split__text {
  color: var(--color-muted);
  max-width: 32rem;
}

.hero-split__visual {
  position: relative;
  min-height: 22rem;
}

.hero-split__img-main {
  width: 88%;
  margin-left: auto;
  border-radius: 18px 18px 4px 18px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.hero-split__img-layer {
  position: absolute;
  left: 0;
  bottom: 8%;
  width: 48%;
  border-radius: 12px;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border: 3px solid var(--color-chalk);
  box-shadow: var(--shadow-soft);
}

.hero-split__caption {
  position: absolute;
  right: 4%;
  top: 6%;
  background: rgba(243, 239, 230, 0.92);
  border: 1px solid rgba(27, 42, 74, 0.15);
  border-radius: 10px;
  padding: 0.65rem 0.85rem;
  font-size: 0.8rem;
  color: var(--color-navy);
  max-width: 11rem;
}

@media (max-width: 800px) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .hero-split__img-main {
    width: 100%;
    aspect-ratio: 16 / 11;
  }

  .hero-split__img-layer {
    width: 42%;
    bottom: -4%;
  }
}

/* Page hero */
.page-hero {
  padding: clamp(2.5rem, 6vw, 4rem) 0 2rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.page-hero--solo {
  grid-template-columns: 1fr;
  max-width: 42rem;
}

.page-hero__img {
  border-radius: 16px;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

@media (max-width: 760px) {
  .page-hero {
    grid-template-columns: 1fr;
  }
}

/* Feature band */
.feature-band {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  align-items: center;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.18);
  border-radius: 20px;
  overflow: hidden;
}

.feature-band__img {
  height: 100%;
  min-height: 18rem;
  object-fit: cover;
  width: 100%;
}

.feature-band__body {
  padding: clamp(1.5rem, 3vw, 2.5rem);
}

@media (max-width: 760px) {
  .feature-band {
    grid-template-columns: 1fr;
  }
}

/* Process steps */
.steps {
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}

.steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: rgba(255, 255, 255, 0.45);
  border-left: 3px solid var(--color-teal);
  border-radius: 0 12px 12px 0;
}

.steps__item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-serif);
  color: var(--color-coral);
  font-size: 1.35rem;
  line-height: 1;
}

/* Quotes */
.quote-list {
  display: grid;
  gap: 1.5rem;
}

.quote {
  padding: 1.5rem 1.6rem;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.2);
  border-radius: var(--radius-card);
}

.quote--wide {
  grid-column: 1 / -1;
}

.quote__text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-navy);
  margin-bottom: 1rem;
}

.quote__meta {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.quote-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 700px) {
  .quote-grid {
    grid-template-columns: 1fr;
  }
}

/* Pricing table-ish */
.rate-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.2);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.rate-table th,
.rate-table td {
  text-align: left;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid rgba(27, 42, 74, 0.1);
  vertical-align: top;
}

.rate-table th {
  background: rgba(27, 42, 74, 0.06);
  font-weight: 600;
  color: var(--color-navy);
}

.rate-note {
  margin-top: 1.25rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Forms */
.form {
  display: grid;
  gap: 1.1rem;
  max-width: 36rem;
}

.form__group {
  display: grid;
  gap: 0.35rem;
}

.form__label {
  font-weight: 500;
  color: var(--color-navy);
  font-size: 0.95rem;
}

.form__input,
.form__select,
.form__textarea {
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 1px solid rgba(27, 42, 74, 0.25);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
}

.form__textarea {
  min-height: 8rem;
  resize: vertical;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: 2px solid var(--color-teal);
  outline-offset: 1px;
}

.form__error {
  color: #9b2c2c;
  font-size: 0.85rem;
  display: none;
}

.form__group.has-error .form__error {
  display: block;
}

.form__group.has-error .form__input,
.form__group.has-error .form__select,
.form__group.has-error .form__textarea {
  border-color: #9b2c2c;
}

.form__status {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  font-size: 0.95rem;
  display: none;
}

.form__status.is-success {
  display: block;
  background: rgba(74, 139, 133, 0.15);
  color: var(--color-teal-deep);
  border: 1px solid rgba(74, 139, 133, 0.35);
}

.form__status.is-error {
  display: block;
  background: rgba(155, 44, 44, 0.08);
  color: #9b2c2c;
  border: 1px solid rgba(155, 44, 44, 0.25);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-aside {
  padding: 1.5rem;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.2);
  border-radius: var(--radius-card);
}

@media (max-width: 800px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

/* Legal prose */
.prose {
  max-width: 46rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
}

.prose th,
.prose td {
  border: 1px solid rgba(27, 42, 74, 0.18);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--color-ivory);
}

/* Blog */
.post-list {
  display: grid;
  gap: 1.75rem;
}

.post-item {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: 1.5rem;
  align-items: center;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid rgba(27, 42, 74, 0.12);
}

.post-item__img {
  border-radius: 12px;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  width: 100%;
}

.post-item__date {
  font-size: 0.85rem;
  color: var(--color-teal);
  margin-bottom: 0.35rem;
}

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

/* Cohorts */
.cohort-list {
  display: grid;
  gap: 1.25rem;
}

.cohort {
  display: grid;
  grid-template-columns: 8rem 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem 1.4rem;
  background: var(--color-ivory);
  border: 1px solid rgba(27, 42, 74, 0.2);
  border-radius: var(--radius-card);
}

.cohort__date {
  font-family: var(--font-serif);
  color: var(--color-navy);
  font-size: 1.15rem;
  line-height: 1.3;
}

.cohort__meta {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 0;
}

@media (max-width: 700px) {
  .cohort {
    grid-template-columns: 1fr;
  }
}

/* Detail lists */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 700px) {
  .detail-grid {
    grid-template-columns: 1fr;
  }
}

.detail-box {
  padding: 1.35rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(27, 42, 74, 0.18);
  border-radius: var(--radius-card);
}

.detail-box h3 {
  font-size: 1.1rem;
}

/* 404 */
.error-page {
  text-align: center;
  padding: 6rem 0 5rem;
}

.error-page h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
}

/* Motion */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.15s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.25s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.35s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.45s; }
.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: none;
}

.parallax-img {
  will-change: transform;
  transition: transform 0.1s linear;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-stagger > *,
  .btn {
    transition: none;
    opacity: 1;
    transform: none;
  }
}