/* ============================================================
   ECT – Linguistic Precision Design System
   Based on DESIGN.md / Brand: Corporate Modern Minimalist
   ============================================================ */

/* --- Custom Properties (from DESIGN.md) ------------------- */
:root {
  /* Colors */
  --color-primary:            #0e9bd8;
  --color-primary-dark:       #00658f;
  --color-secondary:          #355172;
  --color-tertiary:           #152233;
  --color-surface:            #f8f9fa;
  --color-surface-low:        #f3f4f5;
  --color-surface-container:  #edeeef;
  --color-white:              #ffffff;
  --color-on-surface:         #191c1d;
  --color-on-surface-variant: #3e4850;
  --color-outline:            #6e7881;
  --color-outline-variant:    #bec8d1;
  --color-error:              #ba1a1a;
  --color-secondary-container:#bad7fe;

  /* Typography */
  --font-family:   'Inter', system-ui, -apple-system, sans-serif;
  --fs-display:    clamp(2rem, 5vw, 3rem);
  --fs-h1:         clamp(1.75rem, 4vw, 2rem);
  --fs-h2:         clamp(1.375rem, 3vw, 1.5rem);
  --fs-h3:         1.25rem;
  --fs-body-lg:    1.125rem;
  --fs-body:       1rem;
  --fs-label:      0.875rem;

  /* Spacing (8px grid) */
  --space-1:  0.5rem;   /* 8px  */
  --space-2:  1rem;     /* 16px */
  --space-3:  1.5rem;   /* 24px */
  --space-4:  2rem;     /* 32px */
  --space-5:  2.5rem;   /* 40px */
  --space-6:  3rem;     /* 48px */
  --space-8:  4rem;     /* 64px */
  --space-10: 5rem;     /* 80px */
  --container-max: 1200px;
  --gutter: 1.5rem;

  /* Shape */
  --radius-sm:  0.125rem;
  --radius:     0.25rem;
  --radius-md:  0.375rem;
  --radius-lg:  0.5rem;
  --radius-xl:  0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base ------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-body);
  line-height: 1.5;
  color: var(--color-on-surface);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

/* --- Utility ---------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--space-10);
}

.section--alt {
  background: var(--color-surface);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.section__label {
  display: inline-block;
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.section__title {
  font-size: var(--fs-h1);
  font-weight: 600;
  color: var(--color-tertiary);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

.section__subtitle {
  font-size: var(--fs-body-lg);
  color: var(--color-on-surface-variant);
  max-width: 56ch;
  margin-inline: auto;
  line-height: 1.6;
}

/* --- Skip link -------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-2);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-1) var(--space-2);
  border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition);
}
.skip-link:focus { top: 0; }

/* --- Navigation ------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.nav.is-scrolled {
  border-bottom-color: var(--color-outline-variant);
  box-shadow: 0 1px 16px rgba(21, 34, 51, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding-inline: var(--gutter);
  max-width: var(--container-max);
  margin-inline: auto;
}

.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-decoration: none;
}

.nav__logo-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-tertiary);
  letter-spacing: -0.01em;
}

.nav__logo-tagline {
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-outline);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.nav__links a {
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--color-secondary);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav__links a:hover { color: var(--color-primary); }
.nav__links a:hover::after { width: 100%; }

.nav__cta {
  display: none;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius);
}

.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--color-tertiary);
  transition: transform var(--transition), opacity var(--transition), width var(--transition);
  transform-origin: center;
}

.nav__toggle span:nth-child(2) { width: 70%; }

.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); width: 100%; }

/* --- Mobile Nav ------------------------------------------- */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }

  .nav__links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: fixed;
    top: 4rem;
    inset-inline: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-outline-variant);
    padding: var(--space-2) var(--gutter) var(--space-4);
    box-shadow: 0 8px 32px rgba(21, 34, 51, 0.1);
  }

  .nav__links.is-open li { width: 100%; }

  .nav__links.is-open a {
    display: block;
    padding: var(--space-2) 0;
    font-size: var(--fs-body);
    border-bottom: 1px solid var(--color-outline-variant);
    width: 100%;
  }

  .nav__links.is-open a::after { display: none; }
}

@media (min-width: 769px) {
  .nav__cta { display: inline-flex; }
}

/* --- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.75rem 1.625rem;
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(14, 155, 216, 0.3);
}

.btn--secondary {
  background: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}
.btn--secondary:hover {
  background: var(--color-secondary);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding-inline: 0;
}
.btn--ghost:hover { color: var(--color-primary-dark); }

.btn--lg {
  padding: 1rem 2rem;
  font-size: var(--fs-body);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-secondary);
  border-color: var(--color-white);
}
.btn--white:hover {
  background: var(--color-surface-low);
}

/* --- Hero -------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  background: linear-gradient(135deg, var(--color-tertiary) 0%, var(--color-secondary) 60%, #1a3a5c 100%);
  overflow: hidden;
  padding-top: 4rem;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, rgba(14, 155, 216, 0.15) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(53, 81, 114, 0.3) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230e9bd8' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: var(--space-10);
}

.hero__content { color: var(--color-white); }

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.hero__eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1.5px;
  background: var(--color-primary);
}

.hero__title {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__text {
  font-size: var(--fs-body-lg);
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.8);
  max-width: 48ch;
  margin-bottom: var(--space-5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.hero__stats {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero__stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
  display: block;
}

.hero__stat-label {
  font-size: var(--fs-label);
  color: rgba(255, 255, 255, 0.6);
  margin-top: 0.25rem;
  display: block;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero__portrait-wrap {
  position: relative;
  width: clamp(240px, 35vw, 400px);
  aspect-ratio: 3 / 4;
}

.hero__portrait-bg {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(14, 155, 216, 0.3), rgba(53, 81, 114, 0.4));
  transform: rotate(3deg) translate(8px, 8px);
}

.hero__portrait {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero__portrait-placeholder {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(14, 155, 216, 0.2), rgba(21, 34, 51, 0.6));
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.6);
}

.hero__portrait-placeholder svg {
  width: 5rem;
  height: 5rem;
  opacity: 0.5;
}

.hero__badge {
  position: absolute;
  bottom: -1rem;
  left: -1.5rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-3);
  box-shadow: 0 4px 24px rgba(14, 155, 216, 0.4);
  z-index: 2;
}

.hero__badge-value {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.hero__badge-label {
  font-size: 1rem;
  opacity: 0.85;
  margin-top: 0.125rem;
}

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

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.service-card:hover {
  box-shadow: 0 4px 24px rgba(21, 34, 51, 0.08);
  transform: translateY(-2px);
  border-color: var(--color-outline);
}

.service-card__icon {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, rgba(14, 155, 216, 0.12), rgba(53, 81, 114, 0.06));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.service-card__icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-primary);
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card__title {
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--color-tertiary);
  letter-spacing: -0.005em;
}

.service-card__text {
  font-size: var(--fs-body);
  color: var(--color-on-surface-variant);
  line-height: 1.65;
  flex: 1;
}

.service-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.service-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: var(--fs-label);
  color: var(--color-on-surface-variant);
}

.service-card__list li::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 1px;
  margin-top: 5px;
  flex-shrink: 0;
}

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

.project-card {
  background: var(--color-white);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  box-shadow: 0 8px 32px rgba(21, 34, 51, 0.12);
  transform: translateY(-3px);
}

.project-card__cover {
  aspect-ratio: 3 / 4;
  max-height: 280px;
  overflow: hidden;
  background: linear-gradient(160deg, var(--color-secondary), var(--color-tertiary));
  position: relative;
}

.project-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.project-card:hover .project-card__cover img {
  transform: scale(1.04);
}

/* 3D book cover placeholder */
.book-cover {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 800px;
}

.book-cover__inner {
  width: 55%;
  aspect-ratio: 2/3;
  position: relative;
  transform: rotateY(-12deg) rotateX(2deg);
  transform-style: preserve-3d;
  transition: transform 400ms ease;
  box-shadow: 8px 8px 20px rgba(0, 0, 0, 0.4);
}

.project-card:hover .book-cover__inner {
  transform: rotateY(-4deg) rotateX(1deg);
}

.book-cover__front {
  width: 100%;
  height: 100%;
  border-radius: 2px 4px 4px 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.75rem;
  text-align: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.book-cover__front::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 8px;
  background: rgba(0, 0, 0, 0.25);
}

.book-cover__title {
  font-size: 0.75rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.book-cover__author {
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.book-cover__deco {
  width: 80%;
  height: 1px;
  background: rgba(255, 255, 255, 0.3);
}

.project-card__body {
  padding: var(--space-4);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.project-card__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--color-secondary-container);
  color: var(--color-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  align-self: flex-start;
}

.project-card__title {
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--color-tertiary);
  line-height: 1.3;
}

.project-card__subtitle {
  font-size: var(--fs-label);
  color: var(--color-outline);
  line-height: 1.5;
}

.project-card__text {
  font-size: var(--fs-body);
  color: var(--color-on-surface-variant);
  line-height: 1.6;
  flex: 1;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-outline-variant);
  font-size: var(--fs-label);
  color: var(--color-outline);
}

/* --- About ------------------------------------------------ */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

.about__visual {
  position: relative;
}

.about__image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about__image-frame::after {
  content: '';
  position: absolute;
  bottom: -var(--space-3);
  right: -var(--space-3);
  width: 60%;
  height: 40%;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0.15;
}

.about__img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-outline-variant);
}

.about__img-placeholder {
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--color-surface-container), var(--color-surface-low));
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-outline-variant);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-outline);
  gap: var(--space-2);
}

.about__img-placeholder svg {
  width: 4rem;
  height: 4rem;
  opacity: 0.4;
}

.about__accent-card {
  position: absolute;
  bottom: 2rem;
  right: -2rem;
  background: var(--color-white);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: 0 8px 32px rgba(21, 34, 51, 0.1);
}

.about__accent-title {
  font-size: var(--fs-label);
  font-weight: 600;
  color: var(--color-tertiary);
  margin-bottom: 0.5rem;
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  background: var(--color-secondary-container);
  color: var(--color-secondary);
  font-size: 0.75rem;
  font-weight: 500;
}

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

.about__lead {
  font-size: var(--fs-body-lg);
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.about__text {
  font-size: var(--fs-body);
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.about__credentials {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
}

.credential {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--fs-body);
  color: var(--color-on-surface-variant);
}

.credential svg {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-primary);
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- Contact ---------------------------------------------- */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-8);
  align-items: start;
}

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

.contact__info-title {
  font-size: var(--fs-h2);
  font-weight: 600;
  color: var(--color-tertiary);
  line-height: 1.25;
}

.contact__info-text {
  font-size: var(--fs-body);
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-body);
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

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

.contact__detail svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-primary);
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  flex-shrink: 0;
}

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

/* --- Form ------------------------------------------------- */
.form {
  background: var(--color-white);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form__label {
  font-size: var(--fs-label);
  font-weight: 500;
  color: var(--color-secondary);
  letter-spacing: 0.03em;
}

.form__label .required { color: var(--color-primary); margin-left: 2px; }

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-on-surface);
  font-size: var(--fs-body);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form__input::placeholder,
.form__textarea::placeholder { color: var(--color-outline); }

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 155, 216, 0.12);
}

.form__input.is-error,
.form__select.is-error,
.form__textarea.is-error {
  border-color: var(--color-error);
}

.form__select-wrap { position: relative; }
.form__select-wrap::after {
  content: '';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--color-outline);
  pointer-events: none;
}

.form__textarea {
  resize: vertical;
  min-height: 7rem;
  line-height: 1.6;
}

.form__hint {
  font-size: 0.75rem;
  color: var(--color-error);
  display: none;
}
.form__hint.is-visible { display: block; }

/* Honeypot */
.form__honeypot { display: none !important; }

.form__submit { align-self: flex-start; }

.form__status {
  display: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-size: var(--fs-body);
  font-weight: 500;
}
.form__status.is-success {
  display: block;
  background: rgba(14, 155, 216, 0.1);
  color: var(--color-primary-dark);
  border: 1px solid rgba(14, 155, 216, 0.3);
}
.form__status.is-error {
  display: block;
  background: rgba(186, 26, 26, 0.08);
  color: var(--color-error);
  border: 1px solid rgba(186, 26, 26, 0.25);
}

/* --- Footer ----------------------------------------------- */
.footer {
  background: var(--color-tertiary);
  color: rgba(255, 255, 255, 0.75);
  padding-block: var(--space-8);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-1);
}

.footer__brand-tagline {
  font-size: var(--fs-label);
  opacity: 0.6;
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.footer__col-title {
  font-size: var(--fs-label);
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__links a {
  font-size: var(--fs-label);
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-primary); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-label);
}

.footer__legal {
  display: flex;
  gap: var(--space-4);
}

.footer__legal a {
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition);
}
.footer__legal a:hover { color: var(--color-primary); }

/* --- Loading state for form button ------------------------ */
.btn--loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn--loading::after {
  content: '';
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 0.5em;
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Scroll animations ------------------------------------ */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.animate-in.is-visible {
  opacity: 1;
  transform: none;
}
.animate-in[data-delay="1"] { transition-delay: 100ms; }
.animate-in[data-delay="2"] { transition-delay: 200ms; }
.animate-in[data-delay="3"] { transition-delay: 300ms; }

/* --- Divider lines ---------------------------------------- */
.divider {
  height: 1px;
  background: rgba(53, 81, 114, 0.15);
  border: none;
  margin: 0;
}

/* ============================================================
   Responsive Breakpoints
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .services__grid { grid-template-columns: 1fr 1fr; }
  .projects__grid { grid-template-columns: 1fr 1fr; }
  .about__inner { gap: var(--space-6); }
  .contact__inner { gap: var(--space-5); }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: var(--space-5); }

  .about__accent-card { right: 0; }
}

/* Mobile-first adjustments */
@media (max-width: 768px) {
  :root {
    --gutter: 1rem;
    --space-10: 4rem;
    --space-8: 3rem;
  }

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

  /* Hero */
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-block: var(--space-8);
  }

  .hero__visual { order: -1; }

  .hero__portrait-wrap {
    width: clamp(180px, 55vw, 260px);
  }

  .hero__badge { left: 50%; transform: translateX(-50%); bottom: -1.25rem; }

  .hero__eyebrow { justify-content: center; }
  .hero__text { max-width: 100%; margin-inline: auto; }
  .hero__actions { justify-content: center; }
  .hero__stats { justify-content: center; flex-wrap: wrap; gap: var(--space-4); }

  /* Services */
  .services__grid { grid-template-columns: 1fr; }

  /* Projects */
  .projects__grid { grid-template-columns: 1fr; }

  /* About */
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .about__visual { order: -1; }
  .about__accent-card { display: none; }

  /* Contact */
  .contact__inner { grid-template-columns: 1fr; }

  /* Form row */
  .form__row { grid-template-columns: 1fr; }
  .form { padding: var(--space-4); }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr; gap: var(--space-4); }
  .footer__bottom { flex-direction: column; gap: var(--space-2); text-align: center; }
  .footer__legal { flex-wrap: wrap; justify-content: center; }

  /* Section headers */
  .section__subtitle { font-size: var(--fs-body); }
}

@media (max-width: 480px) {
  .hero__title { letter-spacing: -0.015em; }
  .btn--lg { width: 100%; }
  .form__submit { width: 100%; }
  .form__submit .btn { width: 100%; }
  .hero__actions .btn { width: 100%; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .animate-in { opacity: 1; transform: none; }
}