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

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

html, body {
  overflow: hidden;
  height: 100vh;
}

*,
*::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;
}

[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1) brightness(0.9);
}

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;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
  border: 3px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

/* 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;
}

/* loading spinner */
.spinner {
  position: relative;
  display: inline-block;
  flex: 0 0 auto;
  color: var(--muted);
}

.spinner span {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 999px;
  transform-origin: center var(--r);
  background: currentColor;
  opacity: .14;
}

.spinner.sm { width: 16px; height: 16px; }
.spinner.sm span { width: 2.5px; height: 5px; margin-left: -1.25px; margin-top: calc(-1 * var(--r)); --r: 8px; }

.spinner.md { width: 24px; height: 24px; }
.spinner.md span { width: 3.5px; height: 7px; margin-left: -1.75px; margin-top: calc(-1 * var(--r)); --r: 12px; }

.spinner.lg { width: 36px; height: 36px; }
.spinner.lg span { width: 5px; height: 11px; margin-left: -2.5px; margin-top: calc(-1 * var(--r)); --r: 18px; }

.spinner span:nth-child(1) { transform: rotate(0deg);   animation: spinner-fade .8s 0s linear infinite; }
.spinner span:nth-child(2) { transform: rotate(45deg);  animation: spinner-fade .8s .1s linear infinite; }
.spinner span:nth-child(3) { transform: rotate(90deg);  animation: spinner-fade .8s .2s linear infinite; }
.spinner span:nth-child(4) { transform: rotate(135deg); animation: spinner-fade .8s .3s linear infinite; }
.spinner span:nth-child(5) { transform: rotate(180deg); animation: spinner-fade .8s .4s linear infinite; }
.spinner span:nth-child(6) { transform: rotate(225deg); animation: spinner-fade .8s .5s linear infinite; }
.spinner span:nth-child(7) { transform: rotate(270deg); animation: spinner-fade .8s .6s linear infinite; }
.spinner span:nth-child(8) { transform: rotate(315deg); animation: spinner-fade .8s .7s linear infinite; }

.loading-inline {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: var(--muted);
}

.loading-block {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  min-height: 72px;
  color: var(--muted);
  font-size: .86rem;
}

.btn .spinner {
  color: currentColor;
}

@keyframes spinner-fade {
  0% { opacity: 1; }
  100% { opacity: .14; }
}

/* 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;
}

.grade-input,
#sf10-avg,
#sf9-avg {
  appearance: textfield;
  -moz-appearance: textfield; /* Firefox */
}

.grade-input::-webkit-outer-spin-button,
.grade-input::-webkit-inner-spin-button,
#sf10-avg::-webkit-outer-spin-button,
#sf10-avg::-webkit-inner-spin-button,
#sf9-avg::-webkit-outer-spin-button,
#sf9-avg::-webkit-inner-spin-button {
  -webkit-appearance: none; /* Chrome, Safari, Edge, Opera */
  margin: 0;
}

input:disabled {
  opacity: .45;
  cursor: not-allowed;
}

/* grade input - compact */
.grade-input {
  width: 48px;
  padding: .3rem .25rem;
  font-size: .82rem;
  text-align: center;
}

.grade-remark {
  width: 68px;
  padding: .3rem .25rem;
  font-size: .82rem;
  font-weight: 600;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  outline: none;
}

/* 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);
  text-decoration: none;
  transition: background .12s, border-color .12s;
  user-select: none;
}

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: 0 .6rem;
  height: 30px;
  font-size: .78rem;
  line-height: 1.2;
  box-sizing: border-box;
  justify-content: center;
}

.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;
  flex-shrink: 0;
  user-select: none;
}

nav .logo {
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .08em;
  color: var(--text);
  text-decoration: none;
}

nav .nav-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 1.25rem;
  flex-shrink: 0;
}

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;
  padding: .15rem 0;
}

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

nav a.active {
  color: var(--text);
  font-weight: 600;
}

nav .nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* dark mode toggle switch */
.theme-toggle {
  position: relative;
  --toggle-speed: .2s;
  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 var(--toggle-speed);
}

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

.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: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 99px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text);
}

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