/* =========================================================
   Study File — design tokens
   Direction: an engineer's notebook / blueprint grid.
   Grounded in the JEE/engineering subject matter — graph
   paper, ink-blue, drafting corner marks, mono data labels.
   ========================================================= */

:root {
  --paper: #F8F7F2;
  --grid: #DCE3F0;
  --card: #FFFFFF;
  --ink: #1C2430;
  --ink-soft: #5B6573;
  --line: #DCE0E6;
  --blue: #2451B0;
  --blue-deep: #16306B;
  --amber: #E2972F;
  --green: #3F8F66;
  --radius: 10px;
  --max-w: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", -apple-system, Segoe UI, sans-serif;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  line-height: 1.55;
}

.mono { font-family: "IBM Plex Mono", monospace; }

a { color: var(--blue); }

/* ---------- layout shell ---------- */

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-deep);
  display: flex;
  align-items: center;
  gap: 10px;
}

.eyebrow .dot {
  width: 7px;
  height: 7px;
  background: var(--amber);
  border-radius: 50%;
  display: inline-block;
}

.site-nav {
  display: flex;
  gap: 8px;
}

.site-nav a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  background: var(--card);
  padding: 8px 14px;
  border-radius: 999px;
  transition: border-color .15s ease, color .15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible { color: var(--blue-deep); border-color: var(--blue); }

.site-nav a.is-active {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

/* ---------- drafting card with corner registration marks ---------- */

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card::before,
.card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}

.card::before { /* top-left */
  top: -1px; left: -1px;
  border-top: 2px solid var(--blue);
  border-left: 2px solid var(--blue);
  border-top-left-radius: 4px;
}

.card::after { /* bottom-right */
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--blue);
  border-right: 2px solid var(--blue);
  border-bottom-right-radius: 4px;
}

/* ---------- buttons ---------- */

.btn {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 8px;
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #fff;
  padding: 12px 22px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform .12s ease, background .15s ease, box-shadow .15s ease;
}

.btn:hover { background: var(--blue-deep); border-color: var(--blue-deep); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }

.btn.btn-ghost {
  background: transparent;
  color: var(--blue-deep);
}
.btn.btn-ghost:hover { background: rgba(36, 81, 176, 0.08); }

.btn.btn-sm { padding: 7px 12px; font-size: 12px; }
.btn[disabled] { opacity: 0.55; cursor: default; }

/* ---------- PROFILE PAGE ---------- */

.profile-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 22px;
  align-items: stretch;
}

.profile-photo-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.profile-photo-card img {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.profile-photo-card .target-chip {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  background: rgba(226, 151, 47, 0.14);
  color: #94660f;
  border: 1px solid rgba(226, 151, 47, 0.4);
  padding: 6px 12px;
  border-radius: 999px;
}

.profile-details h1 {
  font-size: clamp(28px, 3.4vw, 38px);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.profile-sub {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 18px;
}

.profile-sub strong { color: var(--ink); font-weight: 600; }

.spec-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px dashed var(--line);
}
.spec-row:first-of-type { border-top: none; }

.spec-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-deep);
  padding-top: 2px;
}

.hobby-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hobby-tags span {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
}

.cta-row {
  margin-top: 26px;
  display: flex;
  justify-content: flex-end;
}

/* ---------- TRACKING PAGE ---------- */

.date-rail {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 26px;
}

.date-display {
  min-width: 280px;
  text-align: center;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  padding: 12px 20px;
  position: relative;
}

.date-display .weekday {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.date-display .full-date {
  font-size: 20px;
  font-weight: 600;
  margin-top: 2px;
}

.badge-today,
.badge-future {
  position: absolute;
  top: -10px;
  right: 10px;
  color: #fff;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
}
.badge-today { background: var(--amber); }
.badge-future { background: var(--green); }

.nav-arrow {
  font-family: "IBM Plex Mono", monospace;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .15s ease, color .15s ease;
}
.nav-arrow:hover, .nav-arrow:focus-visible { border-color: var(--blue); color: var(--blue-deep); }

.jump-today {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blue);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.panel h2 {
  font-size: 14px;
  margin: 0 0 14px;
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-deep);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel h2 .count {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 11px;
  color: var(--ink-soft);
}

.row-list { display: flex; flex-direction: column; gap: 10px; }

.row-item {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--paper);
  position: relative;
}

.row-item input {
  font: inherit;
  border: none;
  background: transparent;
  width: 100%;
  padding: 2px 0;
}
.row-item input:focus-visible { outline: 2px solid var(--blue); border-radius: 4px; }

.row-item .field-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.row-remove {
  position: absolute;
  top: 6px;
  right: 6px;
  border: none;
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 4px;
}
.row-remove:hover { color: #C0392B; background: rgba(192, 57, 43, 0.08); }

.add-row-btn {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--blue);
  padding: 9px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 6px;
  width: 100%;
}
.add-row-btn:hover { border-color: var(--blue); background: rgba(36, 81, 176, 0.06); }

.notes-area {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 14px 14px 16px;
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 27px,
    var(--grid) 28px
  );
  background-attachment: local;
  line-height: 28px;
}
.notes-area:focus-visible { outline: 2px solid var(--blue); }

.empty-hint {
  font-size: 13px;
  color: var(--ink-soft);
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}

.save-bar {
  margin-top: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.save-status {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
  min-width: 120px;
}
.save-status.ok { color: var(--green); }
.save-status.err { color: #C0392B; }

footer.site-footer {
  margin-top: 48px;
  text-align: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

@media (max-width: 820px) {
  .profile-grid { grid-template-columns: 1fr; }
  .profile-photo-card img { max-width: 160px; }
  .panels { grid-template-columns: 1fr; }
  .date-display { min-width: 220px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}