/* =============================================================
   Aurelian Woods Limited — Corporate Identity System (CIS)
   Software Consulting / ERP Implementation / System Integration
   ============================================================= */

/* ----- Design Tokens ---------------------------------------- */
:root {
  /* Palette */
  --color-primary: #1B4332;   /* deep ink green */
  --color-gold:    #C9A227;   /* gold, accent only */
  --color-bg:      #FFFFFF;
  --color-surface: #F7F9F8;   /* light green-grey blocks */
  --color-text:    #2D2D2D;
  --color-muted:   #6B7280;
  --color-line:    #E3E8E6;   /* dividers */

  --color-primary-dark: #143026;
  --color-gold-soft: rgba(201, 162, 39, 0.12);

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Noto Serif TC', serif;
  --font-body: 'Inter', 'Noto Sans TC', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  /* Layout */
  --container: 1160px;
  --radius: 10px;
  --radius-sm: 6px;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(27, 67, 50, 0.06);
  --shadow-md: 0 8px 28px rgba(27, 67, 50, 0.08);
  --transition: 180ms ease;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  letter-spacing: 0.2px;
}

p {
  margin: 0 0 var(--space-3);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ----- Layout Helpers --------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section {
  padding: var(--space-8) 0;
}

.section--surface {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section__head {
  max-width: 720px;
  margin: 0 0 var(--space-6);
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 var(--space-2);
}

.section__title {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
}

.section__lead {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin: 0;
}

/* ----- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--gold-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-gold);
}

.btn--gold-outline:hover {
  background: var(--color-gold);
  color: #fff;
}

.btn--gold {
  background: var(--color-gold);
  color: #fff;
  border-color: var(--color-gold);
}

.btn--gold:hover {
  background: #b8931f;
  border-color: #b8931f;
  color: #fff;
}

.btn--on-dark {
  color: #fff;
  border-color: var(--color-gold);
}

.btn--on-dark:hover {
  background: var(--color-gold);
  color: #fff;
}

/* =============================================================
   Header
   ============================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
  min-width: 0;
}

.brand__mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.18rem;
  color: var(--color-primary);
  letter-spacing: 0.18em;
}

.brand:hover .brand__name {
  color: var(--color-primary);
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 6px 0;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--color-primary);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-primary);
  transition: transform var(--transition), opacity var(--transition);
}

/* =============================================================
   Hero
   ============================================================= */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding: var(--space-8) 0;
  max-width: 780px;
}

.hero__title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.08;
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--color-muted);
  max-width: 620px;
  margin-bottom: var(--space-6);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.hero__note {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin: 0;
}

/* =============================================================
   Services cards
   ============================================================= */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #d5ddd9;
}

.card__icon {
  width: 46px;
  height: 46px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: 1.3rem;
  margin-bottom: var(--space-2);
}

.card__text {
  color: var(--color-muted);
  font-size: 0.98rem;
  margin: 0;
}

/* =============================================================
   Process / How We Work
   ============================================================= */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process__step {
  position: relative;
  padding: var(--space-4) var(--space-4) var(--space-4) 0;
}

/* connecting line + node */
.process__node {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-4);
}

.process__dot {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-gold);
  z-index: 1;
}

.process__line {
  flex: 1 1 auto;
  height: 2px;
  background: var(--color-line);
  margin-left: -1px;
}

.process__step:last-child .process__line {
  background: transparent;
}

.process__num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: var(--space-1);
}

.process__title {
  font-size: 1.1rem;
  margin-bottom: var(--space-2);
}

.process__text {
  color: var(--color-muted);
  font-size: 0.94rem;
  margin: 0;
  padding-right: var(--space-4);
}

/* =============================================================
   Industries
   ============================================================= */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.industry {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.industry:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-sm);
}

.industry__icon {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  color: var(--color-primary);
}

.industry__label {
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
}

/* =============================================================
   Why Us — value grid
   ============================================================= */
.values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6) var(--space-7);
}

.value {
  border-left: 2px solid var(--color-gold);
  padding-left: var(--space-4);
}

.value__title {
  font-size: 1.2rem;
  margin-bottom: var(--space-2);
}

.value__text {
  color: var(--color-muted);
  font-size: 0.98rem;
  margin: 0;
}

/* =============================================================
   CTA band
   ============================================================= */
.cta-band {
  background: var(--color-primary);
  color: #fff;
}

.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-7) 0;
  flex-wrap: wrap;
}

.cta-band__title {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 var(--space-2);
}

.cta-band__text {
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
  max-width: 560px;
}

/* =============================================================
   Page header
   ============================================================= */
.page-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-8) 0 var(--space-7);
}

.page-header__title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-3);
}

.page-header__lead {
  color: var(--color-muted);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0;
}

.placeholder-note {
  color: var(--color-muted);
  font-style: italic;
}

/* =============================================================
   Service detail blocks (services.html)
   ============================================================= */
.service-detail {
  max-width: 720px;
}

.service-detail__icon {
  width: 46px;
  height: 46px;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.service-detail__title {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  margin-bottom: var(--space-3);
}

.service-detail__positioning {
  color: var(--color-muted);
  font-size: 1.08rem;
  margin-bottom: var(--space-5);
}

.service-detail__subtitle {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.service-detail__list {
  margin: 0 0 var(--space-5);
}

.service-detail__list li {
  position: relative;
  padding-left: var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--color-text);
  font-size: 1rem;
}

.service-detail__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

.service-detail__outcome {
  border-left: 2px solid var(--color-gold);
  padding-left: var(--space-4);
  margin: 0;
  color: var(--color-text);
  font-size: 1.02rem;
}

.service-detail__outcome-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-1);
}

/* =============================================================
   About page
   ============================================================= */
.prose {
  max-width: 720px;
}

.prose p {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-4);
}

.prose p:last-child {
  margin-bottom: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.apart-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: 720px;
}

.apart-item {
  border-left: 2px solid var(--color-gold);
  padding-left: var(--space-4);
}

.apart-item__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.apart-item__text {
  color: var(--color-muted);
  font-size: 1rem;
  margin: 0;
}

/* =============================================================
   Contact page
   ============================================================= */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-7);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.contact-info__label {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-2);
}

.contact-info__value {
  margin: 0;
  color: var(--color-text);
  font-size: 1.05rem;
}

.contact-info__value a {
  font-weight: 500;
  color: var(--color-primary);
  word-break: break-all;
}

.contact-info__value a:hover {
  color: var(--color-gold);
}

.contact-form-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form-input {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.form-input:hover {
  border-color: #d5ddd9;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(27, 67, 50, 0.12);
}

.form-input--textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.5;
}

.form-error {
  margin: 0;
  color: #9b2c2c;
  font-size: 0.92rem;
}

.form-success {
  padding: var(--space-2) 0;
}

.form-success__title {
  font-size: 1.4rem;
  margin-bottom: var(--space-2);
}

.form-success__text {
  color: var(--color-muted);
  margin: 0;
}

.contact-form .btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* =============================================================
   Footer
   ============================================================= */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.82);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-6);
  padding: var(--space-7) 0 var(--space-6);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.82);
}

.site-footer a:hover {
  color: var(--color-gold);
}

.footer-brand__lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  margin-bottom: var(--space-3);
}

.footer-brand__lockup:hover {
  color: inherit;
}

.footer-brand__mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  letter-spacing: 0.16em;
  margin: 0;
}

.footer-brand__lockup:hover .footer-brand__name {
  color: var(--color-gold);
}

.footer-brand__tagline {
  color: rgba(255, 255, 255, 0.7);
  max-width: 320px;
  margin: 0;
}

.footer-col__title {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.footer-col li {
  margin-bottom: var(--space-2);
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: var(--space-4) 0;
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 900px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 780px) {
  body {
    font-size: 16px;
  }

  .section {
    padding: var(--space-7) 0;
  }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-md);
    padding: var(--space-2) var(--space-4) var(--space-4);
    display: none;
  }

  .nav[data-open="true"] {
    display: flex;
  }

  .nav__link {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-line);
  }

  .nav__link::after {
    display: none;
  }

  /* Services / about / contact stack */
  .grid-3,
  .grid-2,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  /* Process -> vertical */
  .process {
    grid-template-columns: 1fr;
  }

  .process__step {
    display: grid;
    grid-template-columns: 40px 1fr;
    column-gap: var(--space-3);
    padding: 0 0 var(--space-5) 0;
  }

  .process__node {
    flex-direction: column;
    align-items: center;
    margin: 0;
    grid-row: 1 / span 4;
    height: 100%;
  }

  .process__line {
    width: 2px;
    height: auto;
    flex: 1 1 auto;
    margin: var(--space-1) 0 0;
  }

  .process__step:last-child .process__line {
    display: none;
  }

  .process__num,
  .process__title,
  .process__text {
    grid-column: 2;
  }

  .process__text {
    padding-right: 0;
  }

  /* Values stack */
  .values {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .cta-band__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}