/* ─── Fonts ──────────────────────────────────────────── */
@font-face {
  font-family: 'Roboto';
  src: url('../fonts/Roboto-Regular.ttf') format('truetype');
  font-weight: 400;
}
@font-face {
  font-family: 'Roboto';
  src: url('../fonts/Roboto-Bold.ttf') format('truetype');
  font-weight: 700;
}

/* ─── Variables ──────────────────────────────────────── */
:root {
  --grey-0: #494949;
  --grey-1: #707070;
  --grey-2: #969696;
  --grey-3: #dcdcdc;
  --blue:   #65b2ff;
  --orange: #ffc965;
}

/* ─── Base ───────────────────────────────────────────── */
html { overflow-y: scroll; }

body {
  margin: 0;
  line-height: 1.55;
  font-size: 14px;
  font-family: 'Roboto', 'Noto Sans', sans-serif;
}

h1 {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 14px;
}
h3 {
  font-size: 22px;
  font-weight: 700;
  margin: 12px 0 12px;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--orange); }

p { margin: 0; padding: 0 0 6px; }

.mobile-break { display: none; }

/* ─── Layout ─────────────────────────────────────────── */
section {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 28px 24px;
  background: #fff;
  border-bottom: 1px solid var(--grey-3);
}

#profile { padding-top: 4em; max-width: 800px; }

article { padding-bottom: 18px; }

footer {
  font-size: 14px;
  text-align: center;
  margin: 15px 0 20px;
}

/* ─── Profile ────────────────────────────────────────── */
.profile-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  grid-template-areas:
    "pic bio"
    "contact contact";
  column-gap: 14px;
  row-gap: 8px;
  align-items: start;
  margin-bottom: 10px;
}
.profile-pic {
  grid-area: pic;
  width: 130px;
  border: 1px solid var(--grey-3);
  border-radius: 10px;
  display: block;
}
.profile-contact {
  grid-area: contact;
  justify-self: start;
  width: max-content;
  max-width: 100%;
  margin-top: 0;
  font-size: 14px;
}
.profile-links {
  align-items: center;
}
.profile-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.18em;
}
.profile-links a i {
  font-size: 1em;
}
.profile-link-text {
  display: inline;
}
.profile-item {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  line-height: 1.5;
}
.profile-email {
  display: inline-flex;
  align-items: center;
  color: var(--grey-2);
  padding-left: 0;
  margin-top: 6px;
  white-space: nowrap;
}
.profile-text {
  grid-area: bio;
  min-width: 0;
  max-width: none;
  width: 100%;
  padding-top: 2px;
}
.sep { color: #e0e0e0;}

/* ─── Buttons ────────────────────────────────────────── */
.button-group { padding: 14px 28px; max-width: 800px;}

button {
  border: 0;
  padding: 0;
  margin: 0 22px 0 0;
  background: #fff;
  font-family: inherit;
  font-size: 26px;
  font-weight: 700;
  color: var(--grey-3);
  cursor: pointer;
}
button:hover,
button.button-active,
[data-theme="light"] button:hover,
[data-theme="light"] button.button-active { color: #000; }

/* ─── Entry layout (papers, education, experience) ───── */
.entry {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.entry-media        { flex-shrink: 0; }
.entry-media--logo  {
  width: 120px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.entry-body         { flex: 1; min-width: 0; }
.entry-body p       { padding-left: 0; }

/* ─── Images ─────────────────────────────────────────── */
.paper-gif,
.paper-img,
.software-img {
  width: 160px;
  display: block;
  border: 1px solid var(--grey-3);
  border-radius: 6px;
}
.paper-img {
  box-sizing: border-box;
}

.school-logo {
  width: 75px;
  border: 1px solid var(--grey-3);
  border-radius: 6px;
}
.school-logo--upenn {
  width: 60px;
  border: none;
  padding: 2px 6px;
}

.job-logo { width: 110px; }

/* ─── Entry text ─────────────────────────────────────── */
.entry-title {
  font-size: 15px;
  font-weight: 600;
  padding-bottom: 4px;
}
.entry-meta {
  color: var(--grey-2);
  padding-bottom: 2px;
}
.entry-content {
  color: var(--grey-1);
  padding-bottom: 4px;
}
.entry-links {
  color: var(--grey-3);
  padding-bottom: 2px;
}
.entry-label {
  color: var(--grey-2);
  font-size: 13px;
}
.myname {
  font-weight: 700;
  color: var(--grey-1);
}

.label-mobile { display: none; }

/* ─── Theme toggle ───────────────────────────────────── */
#theme-toggle {
  position: fixed;
  top: 1em;
  right: 1.2em;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--grey-3);
  background: #fff;
  color: var(--grey-1);
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  margin: 0;
  padding: 0;
  transition: color 0.2s, border-color 0.2s;
}
#theme-toggle:hover { color: var(--orange); border-color: var(--orange); }

/* ─── Dark mode ──────────────────────────────────────── */
[data-theme="dark"] body               { background: #1e2130; color: #e0e0e0; }
[data-theme="dark"] section            { background: #1e2130; border-bottom-color: #3e3e3e; }
[data-theme="dark"] button             { background: #1e2130; color: #666; }
[data-theme="dark"] button:hover,
[data-theme="dark"] button.button-active { color: #e0e0e0; }
[data-theme="dark"] #theme-toggle      { background: #1e1e1e; border-color: #3a3a3a; color: #bbb; }
[data-theme="dark"] #theme-toggle:hover { color: var(--orange); border-color: var(--orange); }
[data-theme="dark"] .profile-pic       { border-color: #2a2a2a; }
[data-theme="dark"] .profile-email     { color: #888; }
[data-theme="dark"] .sep               { color: #555; }
[data-theme="dark"] .entry-meta        { color: #777; }
[data-theme="dark"] .entry-content     { color: #999; }
[data-theme="dark"] .entry-links       { color: #777; }
[data-theme="dark"] .entry-label       { color: #777; }
[data-theme="dark"] .myname            { color: #999; }
[data-theme="dark"] .paper-gif,
[data-theme="dark"] .paper-img,
[data-theme="dark"] .software-img,
[data-theme="dark"] .school-logo       { border-color: #1e2130; }
[data-theme="dark"] footer             { color: #777; }
.logo-dark                             { display: none; }
[data-theme="dark"] .logo-light        { display: none; }
[data-theme="dark"] .logo-dark         { display: block; }

/* ─── Responsive: tablet ─────────────────────────────── */
@media (max-width: 850px) {
  section { padding: 0 28px 20px; }
}

/* ─── Responsive: mobile ─────────────────────────────── */
@media (max-width: 600px) {
  h1     { font-size: 28px; text-align: center; }


  #profile { padding-top: 2.5em; }

  .profile-row {
    grid-template-columns: 1fr;
    grid-template-areas:
      "pic"
      "contact"
      "bio";
    justify-items: center;
    row-gap: 12px;
  }
  .profile-pic {
    width: 110px;
  }
  .profile-contact {
    width: 100%;
    max-width: min(100%, calc(100vw - 40px));
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .profile-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    width: auto;
    max-width: 100%;
    gap: 0 10px;
    margin: 0 auto;
    text-align: center;
  }
  .profile-links .profile-link-text {
    display: none;
  }
  .profile-links a {
    font-size: 20px;
    padding: 2px 4px;
  }
  .profile-item {
    justify-content: center;
    width: auto;
    max-width: 100%;
  }
  .profile-text {
    width: 100%;
    max-width: 100%;
    padding-top: 0;
  }
  .profile-email {
    display: inline-flex;
    justify-content: center;
    text-align: center;
    width: auto;
    max-width: 100%;
    margin: 6px auto 0;
    font-size: 12px;
  }

  #About .entry-title,
  #About .entry-meta {
    text-align: center;
  }

  .entry {
    flex-direction: column;
    align-items: center;
  }
  .entry-media,
  .entry-media--logo {
    width: 100%;
    display: flex;
    justify-content: center;
  }
  .paper-gif,
  .paper-img,
  .software-img {
    width: min(260px, 80%);
    margin: 0 auto;
  }
  .profile-pic { width: min(140px, 55%); }
  .school-logo { width: min(90px, 40%); }
  .school-logo--upenn { width: min(78px, 33%); }
  .job-logo    { width: min(140px, 40%); }
  .entry-body  { width: 100%; }


  .mobile-break {
    display: block;
  }

  .mobile-left-entries .entry-body {
    box-sizing: border-box;
    padding-left: 14px;
  }

  .mobile-left-entries .entry-title,
  .mobile-left-entries .entry-meta,
  .mobile-left-entries .entry-content,
  .mobile-left-entries .entry-links {
    text-align: left;
  }

  .mobile-left-entries .entry-links {
    word-break: normal;
  }

  .label-desktop { display: none; }
  .label-mobile { display: inline; }


  .mobile-left-entries .entry-body p {
    padding-left: 0;
  }
}