/*===== GOOGLE FONTS =====*/
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap");
/*===== VARIABLES CSS =====*/
:root {
  --header-height: 3rem;
  --font-semi: 600;
  /*===== Colores =====*/
  /*Purple 260 - Red 355 - Blue 224 - Pink 340*/
  /* HSL color mode */
  --hue-color: 90;
  --first-color: hsl(var(--hue-color), 60%, 40%);
  --second-color: hsl(var(--hue-color), 56%, 12%);
  /*===== Fuente y tipografia =====*/
  --body-font: "Poppins", sans-serif;
  --big-font-size: 2rem;
  --h2-font-size: 1.25rem;
  --normal-font-size: .938rem;
  --smaller-font-size: .75rem;
  /*===== Margenes =====*/
  --mb-2: 1rem;
  --mb-4: 2rem;
  --mb-5: 2.5rem;
  --mb-6: 3rem;
  /*===== z index =====*/
  --z-back: -10;
  --z-fixed: 100;
}
@media screen and (min-width: 968px) {
  :root {
    --big-font-size: 3.5rem;
    --h2-font-size: 2rem;
    --normal-font-size: 1rem;
    --smaller-font-size: .875rem;
  }
}
.about__videos-row {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* allows stacking on small screens */
    margin-top: 15px;
}

.about__videos-row iframe {
    width: 30%;
    min-width: 280px;  /* ensures readability on smaller screens */
    aspect-ratio: 16/9;
    border: none;
    border-radius: 0px;
}

.custom-thumbnail {
    width: 100%;
    max-width: 350px;   /* adjust size */
    border-radius: 0px;
    cursor: pointer;
    transition: 0.3s ease;
}

.custom-thumbnail:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 15px rgba(0,0,0,0.25);
}

.video-card-row {
    display: flex;
    gap: 25px;
    justify-content: center;
    flex-wrap: wrap; /* allows stacking on smaller screens */
    margin-top: 20px;
}

.video-card {
    width: 260px; /* adjust size */
    background: #ffffff;
    border-radius: 12px;
    padding: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    text-align: center;
    transition: 0.3s ease;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}

.video-thumb {
    width: 100%;
    border-radius: 10px;
    cursor: pointer;
}

.year-title {
    font-weight: 700;
    color: #c40000; /* red */
    margin-top: 20px;
    margin-bottom: 8px;
    font-size: 20px;
}

.module-list {
    margin-left: 15px;
    line-height: 1.55;
}

.audited {
    font-weight: normal;        /* keep rest of sentence normal weight */
}

.audited .label {
    font-weight: bold;          /* make only “Audited:” bold */
    color: #4CAF50;             /* choose any colour you like */
}

.TA {
    font-weight: normal;        /* keep rest of sentence normal weight */
}

.TA .label {
    font-weight: bold;          /* make only “Audited:” bold */
    color: #FF4D04;             /* choose any colour you like */
}

/* Center the whole game section */
.dot-game-section {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

/* Card style */
.dot-game-card {
  background: rgba(255, 255, 255, 0.97);
  border-radius: 1.5rem;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.15);
  padding: 1.75rem 2rem 2rem;
  max-width: 520px;
  width: 100%;
  text-align: center;
}

/* If your site is dark, you can invert these colors later */
.dot-game-title {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

.dot-game-subtitle {
  font-size: 0.95rem;
  opacity: 0.75;
  margin-bottom: 1rem;
}

/* Canvas */
#dotCanvas {
  width: 100%;
  max-width: 420px;
  height: auto;
  border-radius: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
  display: block;
  margin: 0 auto 1.25rem;
}

/* Controls */
.dot-game-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
  margin-bottom: 0.75rem;
}

.dot-game-label {
  font-size: 0.95rem;
}

.dot-game-input {
  width: 5rem;
  padding: 0.4rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(0, 0, 0, 0.15);
  font-size: 0.95rem;
  text-align: center;
}

/* Buttons */
.dot-game-button {
  border: none;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.2s ease;
  background: #66a329;
  color: #fff;
  box-shadow: 0 4px 10px rgba(77, 171, 247, 0.35);
}

.dot-game-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(77, 171, 247, 0.5);
}

.dot-game-button:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(77, 171, 247, 0.4);
}

.dot-game-button-ghost {
  background: #fff;
  color: #66a329;
  border: 1px solid #66a329;
  box-shadow: none;
}

/* Feedback / stats */
.dot-game-feedback {
  margin-top: 0.4rem;
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}

.dot-game-stats {
  font-size: 0.85rem;
  opacity: 0.75;
}

.cn-name{
  font-family: "FZKai-Z03", "FZ Kai-Z03", "FZKai",
               "FangZheng KaiTi", "FZKTJW",
               "KaiTi", "STKaiti", serif;
  font-weight: 400;
  margin-left: 0.5rem;   /* remove if you use <br> */
  font-size: 0.95em;     /* tweak to taste */
}



.video-title {
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
    color: #222;
    padding: 6px;
    background: #f3f3f3;
    background: #f3f3f3;
    border-radius: 8px;
}


/*===== BASE =====*/
*, ::before, ::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: var(--header-height) 0 0 0;
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  color: var(--second-color);
}

h1, h2, p {
  margin: 0;
}

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

a {
  text-decoration: none;
}

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

/*===== CLASS CSS ===== */
.section-title {
  position: relative;
  font-size: var(--h2-font-size);
  color: var(--first-color);
  margin-top: var(--mb-2);
  margin-bottom: var(--mb-4);
  text-align: center;
}
.section-title::after {
  position: absolute;
  content: "";
  width: 64px;
  height: 0.18rem;
  left: 0;
  right: 0;
  margin: auto;
  top: 2rem;
  background-color: var(--first-color);
}

.section {
  padding-top: 3rem;
  padding-bottom: 2rem;
}

/*===== LAYOUT =====*/
.bd-grid {
  max-width: 1024px;
  display: grid;
  margin-left: var(--mb-2);
  margin-right: var(--mb-2);
}

.l-header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  background-color: #fff;
  box-shadow: 0 1px 4px rgba(146, 161, 176, 0.15);
}

/*===== NAV =====*/
.nav {
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: var(--font-semi);
}
@media screen and (max-width: 767px) {
  .nav__menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 80%;
    height: 100%;
    padding: 2rem;
    background-color: var(--second-color);
    transition: 0.5s;
  }
}
.nav__item {
  margin-bottom: var(--mb-4);
}
.nav__link {
  position: relative;
  color: #fff;
}
.nav__link:hover {
  position: relative;
}
.nav__link:hover::after {
  position: absolute;
  content: "";
  width: 100%;
  height: 0.18rem;
  left: 0;
  top: 2rem;
  background-color: var(--first-color);
}
.nav__logo {
  color: var(--second-color);
}
.nav__toggle {
  color: var(--second-color);
  font-size: 1.5rem;
  cursor: pointer;
}

/*Active menu*/
.active-link::after {
  position: absolute;
  content: "";
  width: 100%;
  height: 0.18rem;
  left: 0;
  top: 2rem;
  background-color: var(--first-color);
}

/*=== Show menu ===*/
.show {
  right: 0;
}

/*===== HOME =====*/
.home {
  position: relative;
  row-gap: 5rem;
  padding: 4rem 0 5rem;
}
.home__data {
  align-self: center;
}
.home__title {
  font-size: var(--big-font-size);
  margin-bottom: var(--mb-5);
}
.home__title-color {
  color: var(--first-color);
}
.home__social {
  display: flex;
  flex-direction: column;
}
.home__social-icon {
  width: max-content;
  margin-bottom: var(--mb-2);
  font-size: 1.5rem;
  color: var(--second-color);
}

.home__img {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 260px;
}
.home__blob {
  fill: var(--first-color);
}
.home__blob-img {
  width: 360px;
}

/*BUTTONS*/
.button {
  display: inline-block;
  background-color: var(--first-color);
  color: #fff;
  padding: 0.75rem 2.5rem;
  font-weight: var(--font-semi);
  border-radius: 0.5rem;
  transition: 0.3s;
}
.button:hover {
  box-shadow: 0px 10px 36px rgba(0, 0, 0, 0.15);
}

/* ===== ABOUT =====*/
.about__container {
  row-gap: 2rem;
  text-align: center;
}
.about__subtitle {
  margin-bottom: var(--mb-2);
}
.about__img {
  justify-self: center;
}
.about__img img {
  width: 200px;
  border-radius: 0.5rem;
}

/* ===== SKILLS =====*/
.skills__container {
  row-gap: 2rem;
  text-align: center;
}
.skills__subtitle {
  margin-bottom: var(--mb-2);
}
.skills__text {
  margin-bottom: var(--mb-4);
}
.skills__data {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  font-weight: var(--font-semi);
  padding: 0.5rem 1rem;
  margin-bottom: var(--mb-4);
  border-radius: 0.5rem;
  box-shadow: 0px 4px 25px rgba(14, 36, 49, 0.15);
}
.skills__icon {
  font-size: 2rem;
  margin-right: var(--mb-2);
  color: var(--first-color);
}
.skills__names {
  display: flex;
  align-items: center;
}
.skills__bar {
  position: absolute;
  left: 0;
  bottom: 0;
  background-color: var(--first-color);
  height: 0.25rem;
  border-radius: 0.5rem;
  z-index: var(--z-back);
}
.skills__html {
  width: 95%;
}
.skills__css {
  width: 85%;
}
.skills__js {
  width: 65%;
}
.skills__ux {
  width: 85%;
}
.skills__img {
  border-radius: 0.5rem;
}

/* ===== WORK =====*/
.work__container {
  row-gap: 2rem;
}
.work__img {
  box-shadow: 0px 4px 25px rgba(14, 36, 49, 0.15);
  border-radius: 0.5rem;
  overflow: hidden;
}
.work__img img {
  transition: 1s;
}
.work__img img:hover {
  transform: scale(1.1);
}

/* ===== CONTACT =====*/
.contact__input {
  width: 100%;
  font-size: var(--normal-font-size);
  font-weight: var(--font-semi);
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1.5px solid var(--second-color);
  outline: none;
  margin-bottom: var(--mb-4);
}
.contact__button {
  display: block;
  border: none;
  outline: none;
  font-size: var(--normal-font-size);
  cursor: pointer;
  margin-left: auto;
}

/* ===== FOOTER =====*/
.footer {
  background-color: var(--second-color);
  color: #fff;
  text-align: center;
  font-weight: var(--font-semi);
  padding: 2rem 0;
}
.footer__title {
  font-size: 2rem;
  margin-bottom: var(--mb-4);
}
.footer__social {
  margin-bottom: var(--mb-4);
}
.footer__icon {
  font-size: 1.5rem;
  color: #fff;
  margin: 0 var(--mb-2);
}
.footer__copy {
  font-size: var(--smaller-font-size);
}

/* ===== MEDIA QUERIES=====*/
@media screen and (max-width: 320px) {
  .home {
    row-gap: 2rem;
  }
  .home__img {
    width: 200px;
  }
}
@media screen and (min-width: 576px) {
  .home {
    padding: 4rem 0 2rem;
  }
  .home__social {
    padding-top: 0;
    padding-bottom: 2.5rem;
    flex-direction: row;
    align-self: flex-end;
  }
  .home__social-icon {
    margin-bottom: 0;
    margin-right: var(--mb-4);
  }
  .home__img {
    width: 300px;
    bottom: 25%;
  }
  .about__container {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    text-align: initial;
  }
  .skills__container {
    grid-template-columns: 0.7fr;
    justify-content: center;
    column-gap: 1rem;
  }
  .work__container {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 2rem;
    padding-top: 2rem;
  }
  .contact__form {
    width: 360px;
    padding-top: 2rem;
  }
  .contact__container {
    justify-items: center;
  }
}
@media screen and (min-width: 768px) {
  body {
    margin: 0;
  }
  .section {
    padding-top: 4rem;
    padding-bottom: 3rem;
  }
  .section-title {
    margin-bottom: var(--mb-6);
  }
  .section-title::after {
    width: 80px;
    top: 3rem;
  }
  .nav {
    height: calc(var(--header-height) + 1.5rem);
  }
  .nav__list {
    display: flex;
    padding-top: 0;
  }
  .nav__item {
    margin-left: var(--mb-6);
    margin-bottom: 0;
  }
  .nav__toggle {
    display: none;
  }
  .nav__link {
    color: var(--second-color);
  }
  .home {
    padding: 8rem 0 2rem;
  }
  .home__img {
    width: 400px;
    bottom: 10%;
  }
  .about__container {
    padding-top: 2rem;
  }
  .about__img img {
    width: 300px;
  }
  .skills__container {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 2rem;
    align-items: center;
    text-align: initial;
  }
  .work__container {
    grid-template-columns: repeat(3, 1fr);
    column-gap: 2rem;
  }
}
@media screen and (min-width: 992px) {
  .bd-grid {
    margin-left: auto;
    margin-right: auto;
  }
  .home {
    padding: 10rem 0 2rem;
  }
  .home__img {
    width: 450px;
  }
}