/* TRACES — base styles */
/* import this in every page */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #ededeb;
  --surface:   #f6f6f4;
  --border:    #dddbd7;
  --text:      #1a1a19;
  --muted:     #78756f;
  --accent:    #1a1a19;
  --accent-bg: #e4e3e0;
  --danger:    #c4392d;
  --success:   #2d8a4e;
  --radius:    6px;
  --font:      'Inter', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg:        #141413;
  --surface:   #1e1e1c;
  --border:    #2c2c29;
  --text:      #e8e6e1;
  --muted:     #8a8780;
  --accent:    #e8e6e1;
  --accent-bg: #242422;
  --danger:    #e8564a;
  --success:   #5cb87a;
}

body {
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* layout */
.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
.split     { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stack     { display: flex; flex-direction: column; gap: .75rem; }
.row       { display: flex; gap: .75rem; align-items: center; }

/* card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

/* typography */
h1 { font-size: 1.35rem; font-weight: 600; letter-spacing: -.01em; }
h2 { font-size: 1.05rem; font-weight: 600; margin-bottom: .5rem; letter-spacing: -.01em; }
h3 { font-size: .8rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
p  { color: var(--muted); font-size: .875rem; }

/* forms */
label {
  font-size: .75rem;
  font-weight: 500;
  color: var(--muted);
  display: block;
  margin-bottom: .2rem;
  letter-spacing: .01em;
}

input, select, textarea {
  width: 100%;
  padding: .45rem .6rem;
  font-size: .85rem;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color .15s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--text);
}

input[type="number"] { text-align: center; }
input:disabled       { opacity: .45; cursor: not-allowed; }

/* grade input — compact */
.grade-input {
  width: 52px;
  padding: .3rem .25rem;
  font-size: .82rem;
  text-align: center;
}

/* buttons */
button, .btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .85rem;
  font-size: .85rem;
  font-family: var(--font);
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: background .12s, border-color .12s;
}

button:hover  { background: var(--accent-bg); border-color: var(--muted); }
button:active { transform: scale(.98); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  opacity: .85;
  background: var(--accent);
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  opacity: .85;
  background: var(--danger);
}

.btn-sm { padding: .3rem .6rem; font-size: .78rem; }
.btn-full { width: 100%; justify-content: center; }

/* table */
table { width: 100%; border-collapse: collapse; font-size: .85rem; }
th    { font-size: .72rem; font-weight: 600; color: var(--muted); text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--border); text-transform: uppercase; letter-spacing: .04em; }
td    { padding: .45rem .5rem; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td      { background: var(--accent-bg); }

/* grades grid */
.grades-grid {
  display: grid;
  grid-template-columns: 2fr repeat(5, 52px);
  gap: 4px;
  align-items: center;
}

.grades-grid .col-header {
  font-size: .72rem;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
}

.grades-grid .subject-label {
  font-size: .85rem;
  color: var(--text);
  padding: .15rem 0;
}

/* scan viewer */
.scan-viewer {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: .5rem;
  color: var(--muted);
  font-size: .85rem;
}

.scan-viewer img,
.scan-viewer iframe {
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  object-fit: contain;
}

/* nav */
nav {
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  height: 48px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: .85rem;
  gap: 0;
}

nav .logo {
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .08em;
  margin-right: 2rem;
  color: var(--text);
}

nav .nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 450;
  transition: color .12s;
}

nav a:hover { color: var(--text); }

nav .nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
}

nav .nav-label {
  font-size: .8rem;
  color: var(--muted);
}

/* dark mode toggle switch */
.theme-toggle {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}

.theme-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.theme-toggle .slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 99px;
  cursor: pointer;
  transition: background .2s;
}

.theme-toggle .slider::before {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  left: 3px;
  top: 3px;
  background: var(--surface);
  border-radius: 50%;
  transition: transform .2s;
}

.theme-toggle input:checked + .slider {
  background: var(--muted);
}

.theme-toggle input:checked + .slider::before {
  transform: translateX(16px);
}

/* badge */
.badge {
  display: inline-block;
  padding: .15rem .5rem;
  font-size: .72rem;
  font-weight: 600;
  border-radius: 99px;
  background: var(--accent-bg);
  color: var(--muted);
}

.badge-success { background: #ecfdf5; color: var(--success); }
.badge-danger  { background: #fef2f2; color: var(--danger); }

[data-theme="dark"] .badge-success { background: #1a2e22; }
[data-theme="dark"] .badge-danger  { background: #2e1a1a; }

/* divider */
hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* search bar */
.search-bar {
  display: flex;
  gap: .5rem;
  align-items: center;
}

.search-bar input { flex: 1; }

/* empty state */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
  font-size: .85rem;
}

/* scrollbar */
::-webkit-scrollbar       { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* selection */
::selection {
  background: var(--accent);
  color: var(--bg);
}