@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap");

:root {
  --page: #edf7ff;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #ffffff;
  --ink: #16324f;
  --muted: #61778d;
  --primary: #168ad4;
  --primary-dark: #0869ae;
  --primary-soft: #e0f2ff;
  --line: rgba(45, 135, 194, 0.16);
  --shadow: 0 18px 45px rgba(52, 113, 157, 0.12);
  --shadow-hover: 0 24px 55px rgba(31, 104, 153, 0.2);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 0;
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
  background:
    radial-gradient(circle at 8% 2%, rgba(99, 195, 255, 0.26), transparent 28rem),
    radial-gradient(circle at 92% 20%, rgba(172, 226, 255, 0.32), transparent 25rem),
    var(--page);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.3;
  background-image: linear-gradient(rgba(22, 138, 212, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 138, 212, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
}

a {
  color: inherit;
}

/* Language switcher */
.lang-switch {
  position: fixed;
  top: 22px;
  left: 24px;
  z-index: 1000;
  display: flex;
  gap: 7px;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 22px rgba(35, 114, 161, 0.13);
  backdrop-filter: blur(14px);
}

.lang-switch button {
  display: grid;
  width: 34px;
  height: 28px;
  padding: 0;
  place-items: center;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}

.lang-switch button:hover,
.lang-switch button:focus-visible {
  background: var(--primary-soft);
  outline: none;
}

.lang-switch img {
  width: 25px;
  height: 17px;
  object-fit: cover;
  border-radius: 4px;
  transition: transform 0.25s ease;
}

.lang-switch button:hover img {
  transform: scale(1.08);
}

/* Profile hero */
.profile {
  position: relative;
  max-width: 1000px;
  margin: 0 auto 18px;
  padding: 116px 24px 78px;
  text-align: center;
}

.profile::before {
  position: absolute;
  top: 74px;
  left: 50%;
  width: min(680px, 90vw);
  height: 260px;
  z-index: -1;
  content: "";
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(129, 211, 255, 0.3), transparent 68%);
  filter: blur(8px);
}

.profile img {
  width: 156px;
  height: 156px;
  object-fit: cover;
  border: 6px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(22, 138, 212, 0.15), 0 18px 35px rgba(27, 117, 169, 0.2);
}

.profile h1 {
  margin: 23px 0 2px;
  color: var(--primary-dark);
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  letter-spacing: 0.04em;
}

.profile h1 + h1 {
  margin-top: 0;
  color: var(--ink);
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: 0.12em;
}

.profile h3 {
  max-width: 560px;
  margin: 15px auto 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
}

section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 54px 24px;
}

section h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
}

section h2 i {
  color: var(--primary);
  font-size: 0.85em;
}

section > p {
  max-width: 660px;
  margin: 0 auto 32px;
  color: var(--muted);
  text-align: center;
  font-size: 0.96rem;
  line-height: 1.7;
}

/* Personal information and socials */
.personal-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 920px;
  margin: 30px auto 18px;
}

.info-item {
  display: flex;
  min-height: 76px;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 9px 25px rgba(51, 114, 153, 0.08);
  color: var(--ink);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.info-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.info-item i {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.info-item span {
  font-size: 0.85rem;
  line-height: 1.45;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 11px;
  max-width: 920px;
  margin: 20px auto 0;
}

.socials a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.socials a i {
  color: var(--primary);
  font-size: 1.05rem;
}

.socials a:hover,
.socials a:focus-visible {
  transform: translateY(-3px);
  background: var(--primary);
  color: #fff;
  outline: none;
}

.socials a:hover i,
.socials a:focus-visible i {
  color: #fff;
}

/* Shared cards */
.project-card,
.article-card,
.certificate-card,
.skill-category {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.project-card,
.article-card,
.certificate-card {
  overflow: hidden;
  border-radius: 22px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover,
.article-card:hover,
.certificate-card:hover,
.skill-category:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.project-card img,
.article-card img {
  display: block;
  width: 100%;
  height: 230px;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.project-card:hover > img,
.article-card:hover > img,
.certificate-card:hover > img {
  transform: scale(1.035);
}

.project-content,
.article-content,
.certificate-content {
  padding: 24px;
}

.project-content h3,
.article-content h3,
.certificate-content h3 {
  margin: 0 0 10px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.08rem;
  line-height: 1.4;
}

.project-content p,
.article-content p,
.certificate-content p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
  text-align: left;
}

/* Skills */
.skills-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 920px;
  margin: 0 auto;
}

.skill-category {
  padding: 28px 22px;
  border-radius: 20px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-icon {
  display: grid;
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(135deg, #64caff, #117bc0);
  box-shadow: 0 10px 20px rgba(17, 123, 192, 0.23);
  color: #fff;
  font-size: 1.55rem;
}

.skill-category h3 {
  margin: 0 0 18px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.skill-item,
.tag,
.certificate-category,
.article-content .category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.76rem;
  font-weight: 600;
}

.skill-item {
  padding: 8px 12px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.skill-item:hover {
  transform: translateY(-2px);
  background: #bce6fc;
}

/* Projects, certificates and articles */
.projects,
.certificates,
.articles {
  display: grid;
  gap: 22px;
}

.project-content .tag,
.certificate-category {
  margin: 0 4px 7px 0;
  padding: 6px 11px;
}

.buttons,
.certificate-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 22px;
}

.buttons a,
.certificate-btn {
  display: inline-flex;
  flex: 1 1 130px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 42px;
  padding: 10px 14px;
  border-radius: 11px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.buttons a:hover,
.certificate-btn:hover {
  transform: translateY(-2px);
}

.buttons a.demo,
.certificate-btn {
  background: linear-gradient(135deg, #27a9ed, #0875bc);
  color: #fff;
  box-shadow: 0 8px 17px rgba(8, 117, 188, 0.2);
}

.buttons a.code,
.certificate-btn.secondary {
  background: #eaf5fc;
  color: var(--primary-dark);
  box-shadow: none;
}

.certificate-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  padding: 18px;
  object-fit: contain;
  background: #f7fcff;
  transition: transform 0.45s ease;
}

.certificate-content h3 {
  margin-top: 13px;
}

.certificate-meta,
.article-meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.78rem;
}

.certificate-meta i,
.article-meta i {
  margin-right: 4px;
  color: var(--primary);
}

.article-content .category {
  margin: 0 5px 12px 0;
  padding: 6px 11px;
}

.article-content {
  position: relative;
  min-height: 245px;
  padding-bottom: 70px;
}

.read-btn {
  position: absolute;
  bottom: 24px;
  left: 24px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--primary-dark);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

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

/* Footer */
footer {
  margin-top: 50px;
  padding: 50px 24px;
  border-top: 1px solid rgba(22, 138, 212, 0.1);
  background: rgba(255, 255, 255, 0.58);
  text-align: center;
}

footer .tagline {
  margin: 0 0 9px;
  color: var(--primary-dark);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
}

footer .copyright {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 760px) {
  .profile {
    padding-top: 105px;
  }

  .personal-info,
  .skills-container {
    grid-template-columns: 1fr;
  }

  section {
    padding: 42px 18px;
  }

  .project-card img,
  .article-card img {
    height: 210px;
  }
}

@media (max-width: 480px) {
  .lang-switch {
    top: 14px;
    left: 14px;
  }

  .profile {
    padding: 92px 18px 52px;
  }

  .profile img {
    width: 132px;
    height: 132px;
  }

  .profile h1 {
    font-size: 1.3rem;
  }

  .profile h1 + h1 {
    font-size: 0.95rem;
  }

  .profile h3 {
    font-size: 0.88rem;
  }

  section h2 {
    font-size: 1.35rem;
  }

  .info-item {
    min-height: 68px;
  }

  .socials a {
    flex: 1 1 calc(50% - 11px);
    padding: 10px 8px;
    font-size: 0.78rem;
  }

  .project-content,
  .article-content,
  .certificate-content {
    padding: 20px;
  }

  .read-btn {
    bottom: 20px;
    left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* Navigation, hero actions and interactive features */
.theme-toggle {
  position: fixed;
  top: 22px;
  right: 24px;
  z-index: 1000;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-strong);
  color: var(--primary-dark);
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(35, 114, 161, 0.13);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  background: var(--primary);
  color: #fff;
  outline: none;
}

.site-nav {
  position: sticky;
  top: 16px;
  z-index: 900;
  display: flex;
  width: fit-content;
  max-width: calc(100% - 40px);
  margin: 0 auto -40px;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 10px 28px rgba(35, 114, 161, 0.12);
  backdrop-filter: blur(16px);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--primary-soft);
  color: var(--primary-dark);
  outline: none;
}

.site-nav i {
  color: var(--primary);
}

.hero-description {
  max-width: 620px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 25px;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 18px;
  border: 0;
  border-radius: 12px;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.hero-btn:hover,
.hero-btn:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.hero-btn.primary {
  background: linear-gradient(135deg, #27a9ed, #0875bc);
  color: #fff;
  box-shadow: 0 9px 20px rgba(8, 117, 188, 0.2);
}

.hero-btn.secondary {
  background: var(--surface-strong);
  color: var(--primary-dark);
  box-shadow: 0 8px 18px rgba(35, 114, 161, 0.1);
}

.project-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 0 auto 25px;
}

.github-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 760px;
  margin: 0 auto 20px;
}

.github-stat {
  display: grid;
  gap: 5px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.github-stat strong {
  color: var(--primary-dark);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.65rem;
}

.github-stat span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.github-repos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.github-repo {
  display: flex;
  min-height: 150px;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface);
  box-shadow: 0 10px 25px rgba(52, 113, 157, 0.08);
}

.github-repo h3 {
  margin: 0 0 7px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  text-align: left;
}

.github-repo p {
  flex: 1;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.github-repo a {
  margin-top: 14px;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.github-repo a:hover {
  color: var(--primary);
}

.github-status {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.86rem;
}

.github-profile-link {
  width: fit-content;
  margin: 22px auto 0;
}

.study-progress {
  max-width: 920px;
  margin: 22px auto 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.progress-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.progress-kicker {
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.progress-heading h3 {
  margin: 6px 0 0;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  text-align: left;
}

.progress-heading strong {
  color: var(--primary-dark);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  white-space: nowrap;
}

.progress-track {
  height: 13px;
  margin: 22px 0 12px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--primary-soft);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #72d1ff, #0875bc);
  box-shadow: 0 0 14px rgba(22, 138, 212, 0.35);
  transition: width 0.8s ease;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.76rem;
}

.progress-meta i {
  margin-right: 4px;
  color: var(--primary);
}

.progress-note {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.filter-btn {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: transparent;
  background: var(--primary);
  color: #fff;
}

.project-card.is-hidden {
  display: none;
}

.details-btn {
  flex: 1 1 130px;
  min-height: 42px;
  padding: 10px 14px;
  border: 0;
  border-radius: 11px;
  background: #dff2ff;
  color: var(--primary-dark);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.details-btn:hover {
  background: #bce6fc;
}

.timeline {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 0 8px 34px;
  border-left: 2px solid rgba(22, 138, 212, 0.25);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 18px;
  margin-bottom: 26px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  position: absolute;
  top: 3px;
  left: -41px;
  width: 14px;
  height: 14px;
  border: 4px solid var(--page);
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 138, 212, 0.22);
  content: "";
}

.timeline-item > span {
  color: var(--primary-dark);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.timeline-item h3 {
  margin: 0 0 6px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  text-align: left;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.achievements {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.achievement-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  width: calc(50% - 10px);
  justify-self: center;
}

.achievement-card {
  position: relative;
  display: grid;
  grid-template-columns: 150px 1fr;
  overflow: hidden;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.achievement-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.achievement-card-pending {
  border-style: dashed;
  background: rgba(255, 255, 255, 0.58);
}

.achievement-pending-media {
  display: grid;
  width: 150px;
  min-height: 220px;
  place-items: center;
  background: linear-gradient(145deg, #e4f4ff, #c5e8fb);
  color: var(--primary);
  font-size: 2.2rem;
}

.achievement-pending-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  margin-top: auto;
  padding-top: 15px;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.achievement-card > img {
  width: 150px;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  background: #f7fcff;
}

.achievement-card:not(.achievement-card-featured) > img {
  padding: 20px;
  object-fit: contain;
}

.achievement-year {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 1;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(8, 117, 188, 0.9);
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
}

.achievement-content {
  display: flex;
  flex-direction: column;
  padding: 24px 20px 20px;
}

.achievement-type {
  margin-bottom: 9px;
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.achievement-content h3 {
  margin: 0 0 9px;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  line-height: 1.4;
  text-align: left;
}

.achievement-content p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
  text-align: left;
}

.achievement-gallery {
  display: flex;
  gap: 7px;
  margin-top: 12px;
}

.achievement-gallery a {
  display: block;
  width: 48px;
  height: 38px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.achievement-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.25s ease;
}

.achievement-gallery a:hover img {
  transform: scale(1.08);
}

.achievement-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  padding-top: 15px;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.achievement-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 14px;
  margin-top: auto;
}

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

.contact-section {
  max-width: 820px;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 700;
}

.contact-form .full-width {
  grid-column: 1 / -1;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-strong);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(22, 138, 212, 0.14);
}

.contact-form > .hero-btn {
  justify-self: start;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  padding: 20px;
  place-items: center;
  background: rgba(13, 48, 76, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  position: relative;
  width: min(580px, 100%);
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface-strong);
  box-shadow: var(--shadow-hover);
  transform: translateY(12px);
  transition: transform 0.25s ease;
}

.modal.open .modal-card {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-dark);
  cursor: pointer;
}

.modal-kicker {
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.modal-card h2 {
  justify-content: flex-start;
  margin-top: 14px;
  padding-right: 24px;
}

.modal-card > p {
  color: var(--muted);
  line-height: 1.7;
}

.modal-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.modal-tech span {
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

body.dark-mode {
  --page: #0e2235;
  --surface: rgba(21, 48, 72, 0.88);
  --surface-strong: #16344d;
  --ink: #e9f6ff;
  --muted: #a8c0d1;
  --primary-soft: #1b4d6d;
  --line: rgba(140, 207, 244, 0.18);
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.22);
  --shadow-hover: 0 24px 55px rgba(0, 0, 0, 0.32);
  background: #0e2235;
}

body.dark-mode::before {
  opacity: 0.14;
}

body.dark-mode .site-nav,
body.dark-mode .lang-switch {
  background: rgba(22, 52, 77, 0.82);
}

@media (max-width: 760px) {
  .site-nav {
    top: 10px;
    overflow-x: auto;
    justify-content: flex-start;
    max-width: calc(100% - 28px);
  }

  .site-nav a {
    flex: 0 0 auto;
    padding: 8px 10px;
  }

  .site-nav a span {
    display: none;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }

  .github-repos {
    grid-template-columns: 1fr;
  }

  .achievements {
    grid-template-columns: 1fr;
  }

  .achievement-card:last-child:nth-child(odd) {
    grid-column: auto;
    width: auto;
  }

  .contact-form .full-width {
    grid-column: auto;
  }
}

@media (max-width: 480px) {
  .theme-toggle {
    top: 14px;
    right: 14px;
  }

  .timeline {
    padding-left: 25px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .timeline-item::before {
    left: -32px;
  }

  .contact-form {
    padding: 18px;
  }

  .study-progress {
    padding: 20px 17px;
  }

  .progress-heading h3 {
    font-size: 0.9rem;
  }

  .progress-heading strong {
    font-size: 1.35rem;
  }

  .progress-meta {
    flex-direction: column;
    gap: 6px;
  }

  .github-stats {
    gap: 8px;
  }

  .github-stat {
    padding: 15px 8px;
  }

  .github-stat strong {
    font-size: 1.3rem;
  }

  .achievement-card {
    grid-template-columns: 112px 1fr;
  }

  .achievement-card > img {
    width: 112px;
    min-height: 190px;
  }

  .achievement-pending-media {
    width: 112px;
    min-height: 190px;
  }

  .achievement-content {
    padding: 21px 15px 16px;
  }

  .achievement-content h3 {
    font-size: 0.88rem;
  }

  .achievement-content p {
    font-size: 0.78rem;
  }
}