:root {
  --color-bg: #f5f7f8;
  --color-surface: #ffffff;
  --color-surface-alt: #e8f5f1;
  --color-text: #0f172a;
  --color-text-muted: #4b5563;
  --color-accent: #1f8a70;
  --color-accent-strong: #136b55;
  --color-border: rgba(15, 23, 42, 0.08);
  --color-overlay: rgba(7, 12, 24, 0.75);
  --gradient-hero: linear-gradient(135deg, #0f172a, #1f8a70);
  --gradient-cta: linear-gradient(120deg, #1f8a70, #2fb59b);
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --space-1: clamp(0.5rem, 1vw, 0.75rem);
  --space-2: clamp(0.75rem, 1.2vw, 1.25rem);
  --space-3: clamp(1rem, 1.5vw, 1.75rem);
  --space-4: clamp(1.5rem, 2.5vw, 2.5rem);
  --section-pad: clamp(4rem, 10vw, 7rem);
  --shell-max: 1200px;
  --radius-md: 1rem;
  --radius-lg: 1.75rem;
  --shadow-soft: 0 20px 50px rgba(15, 23, 42, 0.1);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.2vw, 1.1rem);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

p {
  letter-spacing: 0.01em;
}

html {
  scroll-behavior: smooth;
}

section {
  scroll-margin-top: 90px;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(31, 138, 112, 0.5);
  outline-offset: 3px;
  border-radius: 4px;
}

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -200%);
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  z-index: 1000;
  transition: transform 200ms ease;
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

.shell {
  width: min(var(--shell-max), calc(100% - 2.5rem));
  margin-inline: auto;
}

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

.grid-responsive {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: minmax(0, 1fr);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(245, 247, 248, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-2);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

.primary-nav {
  display: flex;
  gap: var(--space-2);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.primary-nav a {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  transition: background 200ms ease, color 200ms ease;
}

.primary-nav a:hover {
  background: rgba(31, 138, 112, 0.12);
  color: var(--color-accent-strong);
}

.btn {
  border: none;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  padding: 0.85rem 1.5rem;
  transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  animation: float-up 320ms ease backwards;
}

.btn--primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.btn--primary:hover {
  background: linear-gradient(120deg, #1a745d, #2fb59b);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--text {
  background: transparent;
  color: var(--color-accent-strong);
  padding-inline: 0.25rem;
  position: relative;
  font-weight: 600;
}

.btn--text:hover,
.btn--text:focus-visible {
  color: #0b3e32;
  background: rgba(31, 138, 112, 0.15);
  border-radius: 999px;
}

.hero {
  --section-pad: clamp(4rem, 12vw, 8rem);
  background: var(--gradient-hero);
  color: #f1f5f9;
}

.hero__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
}

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

.hero__content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero__content .lede {
  color: rgba(241, 245, 249, 0.85);
  max-width: 38ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-block: var(--space-3);
}

.hero__metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero__metrics span {
  display: block;
  font-size: 2rem;
  font-weight: 600;
}

.hero__visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: rgba(15, 23, 42, 0.65);
}

.about__grid {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}

.about__body {
  order: 1;
}

.about__media {
  order: 2;
}

.media-card {
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.media-card img {
  border-radius: calc(var(--radius-lg) * 0.6);
}

.about__body h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.015em;
}

.about__body p {
  color: var(--color-text-muted);
}

.about__list {
  margin: 0;
  margin-top: var(--space-2);
  padding-left: 1.2rem;
  color: var(--color-text);
  font-weight: 500;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--space-3);
}

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

.project-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  transition: transform 220ms ease, box-shadow 240ms ease, background 240ms ease;
  transform-origin: center;
  will-change: transform, box-shadow;
  animation: float-up 360ms ease backwards;
}

.project-card:hover {
  transform: translateY(-12px) scale(1.03);
  box-shadow: 0 34px 70px rgba(15, 23, 42, 0.28);
  background: var(--color-surface-alt);
}

.project-card__media {
  overflow: hidden;
  padding: 0.75rem 0.75rem 0;
}

.project-card__media img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: calc(var(--radius-md) - 0.5rem);
  transition: transform 340ms ease;
}

.project-card:hover .project-card__media img {
  transform: scale(1.08);
}

.project-card__body {
  padding: var(--space-3);
}

.project-card__category {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.project-card__cta {
  margin-top: var(--space-2);
}

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

.contact__intro p {
  color: var(--color-text-muted);
}

.contact__details {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
}

.contact__details span {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 320ms ease, transform 320ms ease;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.contact__form {
  background: var(--color-surface);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.tooltip-layer {
  position: fixed;
  pointer-events: none;
  inset: 0;
  z-index: 100;
}

.tooltip {
  position: absolute;
  background: var(--color-text);
  color: #f8fafc;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 200ms ease, transform 200ms ease;
}

.tooltip.is-visible {
  opacity: 0.95;
  transform: translateY(0);
}

.tooltip-trigger {
  position: relative;
}

.tooltip-trigger[data-tooltip-active="true"]::after {
  content: "";
  position: absolute;
  inset: 0;
}

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: transparent;
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease;
  z-index: 200;
}

.modal[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
  background: var(--color-overlay);
}

.modal__backdrop {
  position: absolute;
  inset: 0;
}

.modal__dialog {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  width: min(640px, calc(100% - 2rem));
  max-height: 90vh;
  overflow-y: auto;
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  box-shadow: 0 40px 120px rgba(7, 12, 24, 0.4);
}

.modal__media img {
  border-radius: var(--radius-md);
}

.modal__list {
  margin: var(--space-2) 0;
  padding-left: 1.2rem;
  color: var(--color-text);
}

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

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  cursor: pointer;
  color: #ffffff;
}

.modal__close:hover {
  color: rgba(255, 255, 255, 0.85);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-weight: 600;
}

.form-field input,
.form-field textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  background: #fdfdfd;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(31, 138, 112, 0.15);
}

.site-footer {
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-border);
}

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

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  color: var(--color-text-muted);
}

.footer__links a:hover {
  color: var(--color-accent);
}

[data-scroll="portfolio"] {
  position: relative;
}

[data-scroll="portfolio"]::after {
  content: "";
  position: absolute;
  inset: auto 0 -4px 0;
  height: 2px;
  background: currentColor;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease, opacity 200ms ease;
}

[data-scroll="portfolio"]:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

button[data-scroll="portfolio"]::after,
button[data-scroll="portfolio"]:hover::after {
  content: none;
}

/* Center hero and about visuals on narrow screens */
@media (max-width: 768px) {
  .hero__visual {
    justify-self: center;
    text-align: center;
  }

  .hero__visual img {
    margin-inline: auto;
  }

  .about__media {
    justify-self: center;
  }

  .media-card {
    margin-inline: auto;
  }
}

@keyframes float-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Compact tweaks for handheld layouts */
@media (max-width: 720px) {
  .header__inner {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
  }

  .primary-nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero__actions {
    width: 100%;
    flex-direction: column;
  }

  .hero {
    text-align: center;
  }

  .hero__content {
    align-items: center;
    text-align: center;
  }

  .hero__content .lede {
    margin-inline: auto;
  }

  .hero__visual {
    order: -1;
  }

  .contact__form {
    padding: var(--space-3);
  }

  .modal__dialog {
    width: calc(100% - 1.5rem);
  }
}

/* Extra-tight spacing on very small screens */
@media (max-width: 480px) {
  .shell {
    width: calc(100% - 1.5rem);
  }

  .project-card__body {
    padding: var(--space-2);
  }

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

  .modal__actions {
    flex-direction: column;
  }
}

/* Tablet portrait enhancements */
@media (min-width: 600px) {
  .hero__metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Tablet landscape / small desktop */
@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  }

  .hero__visual {
    order: initial;
  }

  .about__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about__body,
  .about__media {
    order: initial;
  }

  .portfolio__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

/* Full desktop layouts */
@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
  }

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

  .contact__grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .footer__grid {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal-on-scroll,
  .tooltip,
  .modal {
    transition-duration: 0.01ms !important;
  }
}