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

html {
  scroll-behavior: smooth;
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

:root {
  /* Display / Hero */
  --font-size-hero: clamp(1.5rem, 1.1rem + 1.74vw, 2.5rem);
  --font-size-hero-sub: clamp(1.375rem, 1.04rem + 1.46vw, 2.2rem);
  --font-size-h1: clamp(1.375rem, 1.08rem + 1.28vw, 2.4rem);

  /* Headings */
  --font-size-h2: clamp(1.25rem, 1.02rem + 1vw, 2rem);
  --font-size-h3: clamp(1.125rem, 0.98rem + 0.63vw, 1.5rem);
  --font-size-h4: clamp(1rem, 0.94rem + 0.28vw, 1.15rem);

  /* Body */
  --font-size-base: clamp(0.938rem, 0.875rem + 0.28vw, 1rem);
  --font-size-body: clamp(0.85rem, 0.82rem + 0.13vw, 0.95rem);
  --font-size-body-sm: clamp(0.813rem, 0.78rem + 0.14vw, 0.9rem);

  /* Small / UI */
  --font-size-sm: clamp(0.813rem, 0.77rem + 0.19vw, 0.85rem);
  --font-size-xs: clamp(0.75rem, 0.72rem + 0.13vw, 0.8rem);
}

body {
  font-family:
    "Poppins",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  color: #1a1a1a;
  background: #ffffff;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 {
  transition-delay: 0.1s;
}
.fade-in-delay-2 {
  transition-delay: 0.2s;
}
.fade-in-delay-3 {
  transition-delay: 0.3s;
}
.fade-in-delay-4 {
  transition-delay: 0.4s;
}

/* --- Layout --- */
.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 2rem;
}

.container--wide {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 4rem 0;
}

/* --- Dividers --- */
.divider {
  border: none;
  border-top: 1px solid #ddd;
  margin: 0;
}

.divider--thick {
  border-top-width: 2px;
  border-color: #1a1a1a;
}

/* --- Header / Top Bar --- */
.site-header {
  padding: 1.5rem 0;
  position: relative;
}

.site-header .container,
.site-header .container--wide {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header__home {
  display: flex;
  align-items: center;
  color: #2ba84a;
  transition: opacity 0.2s ease;
}

.site-header__home:hover {
  opacity: 0.6;
}

.site-header__home svg {
  width: 24px;
  height: 24px;
}

.social-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.social-links a {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: #2ba84a;
  transition: opacity 0.2s ease;
}

.social-links a:hover {
  opacity: 0.6;
}

.social-links svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

/* --- Hero --- */
.hero {
  text-align: left;
  padding: 5rem 0 3rem;
}

.hero__title {
  font-size: var(--font-size-hero);
  font-weight: 800;
  color: #1a1a1a;
  line-height: 1.5;
  letter-spacing: -0.02em;
  margin-bottom: -0.2rem;
}

.hero__subtitle {
  font-size: var(--font-size-hero-sub);
  font-weight: 800;
  color: #2ba84a;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero__tagline {
  font-size: var(--font-size-base);
  line-height: 1.7;
  margin: 0 auto;
  color: #1a1a1a;
}

/* --- Nav Links (main page) --- */
.nav-links {
  display: flex;
  justify-content: center;
  gap: 3rem;
  padding: 2rem 0;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: var(--font-size-body-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #1a1a1a;
  transition: opacity 0.2s ease;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: #2ba84a;
  transition: width 0.25s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* --- Sticky Nav (case study pages) --- */
.sticky-nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  border-bottom: 1px solid #e8e8e8;
}

.sticky-nav .container,
.sticky-nav .container--wide {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.sticky-nav__home {
  display: flex;
  align-items: center;
  color: #1a1a1a;
  transition: opacity 0.2s ease;
}

.sticky-nav__home:hover {
  color: #2ba84a;
}

.sticky-nav__home svg {
  width: 22px;
  height: 22px;
}

.sticky-nav__links {
  display: flex;
  gap: 1.6rem;
  align-items: center;
  justify-content: center;
}

.sticky-nav__links a {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 0.2s ease;
}

.sticky-nav__links a:hover {
  color: #2ba84a;
}

/* --- Section Headings --- */
.section-heading {
  font-size: var(--font-size-h2);
  font-weight: 800;
  text-decoration-line: underline;
  text-underline-offset: 0.3rem;
  text-decoration-thickness: 0.15rem;
  text-decoration-color: #2ba84a;
  margin-bottom: 1.4rem;
  letter-spacing: -0.01em;
}

/* --- Projects Grid --- */
.projects {
  padding: 3rem 0;
  background-color: #faf8f8;
}

.project-card {
  margin-bottom: 3.5rem;
}

.project-card:last-child {
  margin-bottom: 0;
}

.project-card__media {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 4px;
  margin-bottom: 1.4rem;
  position: relative;
  background: #f0f0f0;
}

.project-card__media img {
  width: 100%;
  height: 100%;
  margin-bottom: 1.4rem;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .project-card__media img {
  transform: scale(1.02);
}

.project-card__media--video::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(0, 0, 0, 0.65);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpolygon points='9.5,7.5 16.5,12 9.5,16.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 24px;
  pointer-events: none;
  transition: background-color 0.2s ease;
}

.project-card:hover .project-card__media--video::after {
  background-color: rgba(0, 0, 0, 0.8);
}

.project-card__title {
  font-size: var(--font-size-h3);
  font-weight: 800;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
  transition: color 0.2s ease;
}

.project-card__title:hover {
  color: #2ba84a;
}

.project-card__desc {
  font-size: var(--font-size-base);
  color: #444;
  margin-bottom: 0.6rem;
  line-height: 1.65;
}

.project-card__date {
  font-size: var(--font-size-body-sm);
  color: #555;
  margin-bottom: 0.8rem;
}

.project-card__tech {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-bottom: 1.2rem;
}

.project-card__tech li {
  font-size: var(--font-size-body-sm);
  color: #555;
  padding-left: 1em;
  position: relative;
}

.project-card__tech li::before {
  content: "•";
  position: absolute;
  left: 0;
}

.project-card__link {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid #2ba84a;
  padding: 0.55rem 1.6rem;
  border-radius: 3px;
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.project-card__link:hover {
  background: #2ba84a;
  color: #fff;
}

/* --- Skills --- */
.skills {
  padding: 3rem 0;
}

.skills__intro {
  font-size: var(--font-size-body);
  color: #444;
  margin-bottom: 1.6rem;
  line-height: 1.7;
}

.skills__list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 0;
}

.skills__list li {
  font-size: var(--font-size-body);
  line-height: 1.65;
  color: #444;
  padding-left: 1.2em;
  position: relative;
}

.skills__list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #1a1a1a;
  font-weight: bold;
}

.skills__list li strong {
  color: #1a1a1a;
}

/* --- Experience --- */
.experience {
  padding: 3rem 0;
  background-color: #faf8f8;
}

.experience__meta {
  font-size: var(--font-size-sm);
  color: #666;
  font-style: italic;
  margin-bottom: 0.3rem;
}

.experience__role {
  font-size: var(--font-size-h4);
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.experience__company {
  font-size: var(--font-size-body);
  color: #555;
  margin-bottom: 1.2rem;
}

.experience__desc {
  font-size: var(--font-size-body);
  color: #444;
  margin-bottom: 1.4rem;
  line-height: 1.7;
}

.experience__highlights {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.experience__highlights li {
  font-size: var(--font-size-body);
  line-height: 1.65;
  color: #444;
  padding-left: 1.2em;
  position: relative;
}

.experience__highlights li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #1a1a1a;
}

.experience__highlights li strong {
  color: #1a1a1a;
}

.experience__cta {
  margin-top: 2rem;
}

.experience__cta a {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid #21823a;
  padding: 0.55rem 1.6rem;
  border-radius: 3px;
  transition:
    background 0.2s ease,
    color 0.2s ease;
  display: inline-block;
}

.experience__cta a:hover {
  background: #2ba84a;
  color: #fff;
}

/* --- Contact --- */
.contact {
  padding: 3rem 0 4rem;
}

.contact__table {
  width: 100%;
  border-collapse: collapse;
}

.contact__table td {
  padding: 0.5rem 0;
  font-size: var(--font-size-body);
  vertical-align: top;
}

.contact__table td:first-child {
  font-weight: 700;
  white-space: nowrap;
  padding-right: 1.5rem;
  width: 100px;
}

.contact__table a {
  color: #1a1a1a;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.2s ease;
}

.contact__table a:hover {
  opacity: 0.6;
}

/* --- Footer --- */
.site-footer {
  padding: 2rem 0;
  text-align: center;
}

.site-footer__copy {
  font-size: var(--font-size-xs);
  color: #888;
  margin-bottom: 1rem;
}

.site-footer .social-links {
  justify-content: center;
}

/* ============================================
   CASE STUDY PAGES
   ============================================ */

/* --- Case Study Hero --- */
.cs-hero {
  padding: 3rem 0 2rem;
}

.cs-hero__back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: #888;
  margin-bottom: 2rem;
  transition: color 0.2s ease;
}

.cs-hero__back:hover {
  color: #1a1a1a;
}

.cs-hero__back svg {
  width: 14px;
  height: 14px;
}

.cs-hero__title {
  font-size: var(--font-size-h1);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.cs-hero__subtitle {
  font-size: var(--font-size-h4);
  font-weight: 600;
  color: #555;
  margin-bottom: 1.2rem;
}

.cs-hero__lead {
  font-size: var(--font-size-base);
  color: #444;
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.cs-hero__date {
  font-size: var(--font-size-sm);
  color: #555;
}

/* --- Case Study Media --- */
.cs-media {
  padding: 2rem 0;
}

.cs-media__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 4px;
}

.cs-media__video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 4px;
  overflow: hidden;
  background: #000;
}

.cs-media__video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* --- Case Study Content --- */
.cs-section {
  padding: 2rem 0;
}

.cs-section__heading {
  font-size: var(--font-size-h4);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.cs-section__text {
  font-size: var(--font-size-body);
  color: #444;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.cs-section__text:last-child {
  margin-bottom: 0;
}

.cs-section__text strong {
  color: #1a1a1a;
}

/* --- Impact / Outcome List --- */
.cs-impact-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cs-impact-list li {
  font-size: var(--font-size-body);
  line-height: 1.7;
  color: #444;
  padding-left: 1.2em;
  position: relative;
}

.cs-impact-list li:last-child {
  margin-bottom: 1rem;
}

.cs-impact-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #1a1a1a;
  font-weight: bold;
}

.cs-impact-list li strong {
  color: #1a1a1a;
}

/* --- Testimonials --- */
.cs-testimonial {
  border-left: 3px solid #21823a;
  padding-left: 1.5rem;
  margin: 1.5rem 0;
}

.cs-testimonial__quote {
  font-size: var(--font-size-body);
  color: #444;
  line-height: 1.75;
  font-style: italic;
  margin-bottom: 0.5rem;
}

.cs-testimonial__author {
  font-size: var(--font-size-sm);
  color: #888;
  font-weight: 600;
}

/* --- Tech List (case study) --- */
.cs-tech-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.cs-tech-list li {
  font-size: var(--font-size-body-sm);
  color: #555;
  padding-left: 1em;
  position: relative;
}

.cs-tech-list li::before {
  content: "•";
  position: absolute;
  left: 0;
}

/* --- Accordion (Project 2) --- */
.accordion {
  margin: 1.5rem 0;
}

.accordion__item {
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.2rem;
  background: #fff;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--font-size-body-sm);
  font-weight: 700;
  color: #1a1a1a;
  text-align: left;
  transition: background 0.2s ease;
}

.accordion__trigger:hover {
  background: #f0f0f0;
}

.accordion__trigger-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.accordion__item.is-open .accordion__trigger-icon {
  transform: rotate(180deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.accordion__content-inner {
  padding: 1.2rem;
}

.accordion__step {
  margin-bottom: 1.2rem;
}

.accordion__step:last-child {
  margin-bottom: 0;
}

.accordion__step-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #21823a;
  margin-bottom: 0.3rem;
}

.accordion__step-title {
  font-size: var(--font-size-body);
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 0.5rem;
}

.accordion__step-text {
  font-size: var(--font-size-body-sm);
  color: #555;
  line-height: 1.7;
  margin-bottom: 0.5rem;
}
.accordion__step-text-tech-highlight {
  font-size: var(--font-size-body-sm);
  color: #444;
  border-left: 3px solid #21823a;
  padding-left: 0.5rem;
  line-height: 1.7;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.accordion__step-text:last-child {
  margin-bottom: 0;
}

.accordion__step-text code {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 0.82rem;
  background: #f4f4f4;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  color: #c7254e;
}

.accordion__step-text a {
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.2s ease;
}

.accordion__step-text a:hover {
  opacity: 0.6;
}

pre.code-block {
  background: #ddd;
  color: #1a1a1a;
  padding: 1rem 1.2rem;
  border-radius: 4px;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: var(--font-size-xs);
  overflow-x: auto;
  margin: 0.8rem 0;
  line-height: 1.6;
}

/* --- Project overview cards (project 2) --- */
.cs-overview-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.cs-overview-card {
  padding: 1.2rem 1.4rem;
  background: #faf8f8;
  border-radius: 6px;
  border-left: 3px solid #21823a;
}

.cs-overview-card__title {
  font-size: var(--font-size-body);
  font-weight: 700;
  margin-bottom: 0.15rem;
}

.cs-overview-card__subtitle {
  font-size: var(--font-size-sm);
  color: #666;
  font-style: italic;
  margin-bottom: 0.6rem;
}

.cs-overview-card__text {
  font-size: var(--font-size-body-sm);
  color: #555;
  line-height: 1.65;
}

/* --- Home Link (bottom of case study) --- */
.cs-home-link {
  text-align: center;
  padding: 2rem 0;
}

.cs-home-link a {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid #2ba84a;
  padding: 0.55rem 1.6rem;
  border-radius: 3px;
  display: inline-block;
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.cs-home-link a:hover {
  background: #2ba84a;
  color: #fff;
}

/* ============================================
   RESPONSIVE  –  layout-only (typography is
   handled by clamp() custom properties above)
   ============================================ */

@media (max-width: 1024px) {
  .nav-links {
    gap: 1.2rem;
  }

  .sticky-nav__links {
    gap: 0.8rem;
  }
}

@media (max-width: 480px) {
  .nav-links {
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
  }

  .sticky-nav .container,
  .sticky-nav .container--wide {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .sticky-nav__links {
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }

  .contact__table td:first-child {
    display: block;
    padding-right: 0;
    padding-bottom: 0;
  }
}