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

:root {
  --bg:        #0c0c0c;
  --surface:   #161616;
  --surface2:  #1e1e1e;
  --border:    #2a2a2a;
  --text:      #e8e8e8;
  --muted:     #888;
  --accent:    #c84444;
  --accent-lo: rgba(200,68,68,.12);
  --green:     #4caf6e;
  --yellow:    #e0a943;
  --red:       #c84444;
  --blue:      #4a8fd4;
  --radius:    10px;
  --mono:      "DM Mono", monospace;
  --sans:      "DM Sans", sans-serif;
  --transition: 160ms ease;
}

[data-theme="light"] {
  --bg:        #f5f5f3;
  --surface:   #ffffff;
  --surface2:  #eeeeec;
  --border:    #dcdcda;
  --text:      #111;
  --muted:     #666;
  --accent-lo: rgba(200,68,68,.08);
}

html, body { height: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.mono   { font-family: var(--mono); }

#app { min-height: 100dvh; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  height: 52px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar-brand {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: .02em;
  user-select: none;
}
.topbar-actions { display: flex; gap: 8px; align-items: center; }
.icon-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}
.icon-btn:hover { color: var(--text); border-color: var(--muted); }
.icon-btn svg { width: 15px; height: 15px; }

.view { display: none; flex: 1; }
.view.active { display: flex; flex-direction: column; }

#view-login {
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}
.login-card {
  width: 100%;
  max-width: 360px;
}
.login-logo {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 28px;
}
.login-logo-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.login-logo-icon svg { width: 20px; height: 20px; color: #fff; }
.login-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.2;
}
.login-subtitle {
  font-size: 12px;
  color: var(--muted);
  margin-top: 1px;
}
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.field input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  padding: 10px 12px;
  outline: none;
  transition: border-color var(--transition);
}
.field input:focus { border-color: var(--accent); }
.field input::placeholder { color: var(--muted); opacity: .6; }
.login-btn {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  padding: 11px;
  cursor: pointer;
  margin-top: 4px;
  transition: opacity var(--transition);
}
.login-btn:hover:not(:disabled) { opacity: .88; }
.login-btn:disabled { opacity: .45; cursor: default; }
.login-error {
  font-size: 13px;
  color: var(--red);
  min-height: 18px;
  margin-top: 10px;
  text-align: center;
}
.login-note {
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  margin-top: 18px;
  line-height: 1.5;
}

#view-grades { padding: 0 0 80px; }

.summary-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 16px 12px;
  gap: 12px;
}
.summary-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
.summary-avg {
  font-family: var(--mono);
  font-size: 32px;
  font-weight: 500;
  line-height: 1;
}
.summary-avg.excellent { color: var(--green); }
.summary-avg.pass      { color: var(--yellow); }
.summary-avg.fail      { color: var(--red); }

.refresh-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  padding: 6px 12px;
  font-family: var(--sans);
  font-size: 12px;
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  transition: color var(--transition);
  flex-shrink: 0;
}
.refresh-btn:hover { color: var(--text); }
.refresh-btn svg { width: 13px; height: 13px; }
.refresh-btn.spinning svg { animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.period-block { padding: 0 12px 8px; }
.period-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  padding: 12px 4px 8px;
  display: flex; align-items: center; justify-content: space-between;
}
.period-avg {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
}

.subject-row {
  display: flex; align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  gap: 10px;
}
.subject-row:hover { border-color: var(--muted); background: var(--surface2); }
.subject-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.grade-chips { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; align-items: center; }
.chip {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity var(--transition);
}
.chip:hover { opacity: .75; }
.chip.excellent { background: rgba(76,175,110,.15); color: var(--green); }
.chip.pass      { background: rgba(224,169,67,.13); color: var(--yellow); }
.chip.fail      { background: rgba(200,68,68,.15);  color: var(--red); }
.chip.blue      { background: rgba(74,143,212,.15); color: var(--blue); }
.subject-avg {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  min-width: 30px;
  text-align: right;
}

#view-subject { padding: 0 0 80px; }

.back-btn {
  display: flex; align-items: center; gap: 6px;
  background: none;
  border: none;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 13px;
  cursor: pointer;
  padding: 14px 16px 4px;
  transition: color var(--transition);
}
.back-btn:hover { color: var(--text); }
.back-btn svg { width: 15px; height: 15px; }

.subject-header {
  padding: 8px 16px 16px;
  border-bottom: 1px solid var(--border);
}
.subject-header-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}
.subject-stats {
  display: flex; gap: 16px; flex-wrap: wrap;
}
.stat {
  display: flex; flex-direction: column;
}
.stat-value {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 500;
  line-height: 1;
}
.stat-label {
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}

.period-grades {
  padding: 14px 14px 0;
}
.grade-card {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  margin-bottom: 6px;
  cursor: pointer;
  transition: border-color var(--transition);
}
.grade-card:hover { border-color: var(--muted); }
.grade-big {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  min-width: 42px;
}
.grade-meta { flex: 1; }
.grade-date { font-size: 12px; color: var(--muted); }
.grade-component { font-size: 12px; color: var(--muted); margin-top: 1px; }
.grade-note { font-size: 12px; color: var(--muted); margin-top: 3px; font-style: italic; }

.goal-section {
  margin: 16px 14px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  transition: border-color 400ms ease;
}
.goal-section.flash-up {
  animation: flash-border-up 600ms ease forwards;
}
.goal-section.flash-down {
  animation: flash-border-down 600ms ease forwards;
}
@keyframes flash-border-up {
  0%   { border-color: var(--border); }
  30%  { border-color: var(--green); box-shadow: 0 0 0 2px rgba(76,175,110,.18); }
  100% { border-color: var(--border); box-shadow: none; }
}
@keyframes flash-border-down {
  0%   { border-color: var(--border); }
  30%  { border-color: var(--red); box-shadow: 0 0 0 2px rgba(200,68,68,.18); }
  100% { border-color: var(--border); box-shadow: none; }
}
.goal-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 10px;
}
.goal-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.goal-input {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  padding: 7px 10px;
  width: 70px;
  outline: none;
  transition: border-color var(--transition);
}
.goal-input:focus { border-color: var(--accent); }
.goal-btn {
  background: var(--accent-lo);
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  padding: 7px 12px;
  cursor: pointer;
  transition: background var(--transition);
}
.goal-btn:hover { background: rgba(200,68,68,.2); }
.goal-result {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.5;
  min-height: 18px;
}
.goal-result strong { color: var(--text); font-family: var(--mono); }

.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.65);
  display: flex; align-items: flex-end; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 200ms ease;
}
.modal-overlay.show { opacity: 1; pointer-events: all; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  width: 100%;
  max-width: 480px;
  padding: 20px 20px 28px;
  transform: translateY(20px);
  transition: transform 200ms ease;
}
.modal-overlay.show .modal { transform: translateY(0); }
.modal-handle {
  width: 36px; height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin: 0 auto 16px;
}
.modal-grade-big {
  font-family: var(--mono);
  font-size: 48px;
  font-weight: 500;
  line-height: 1;
  text-align: center;
  margin-bottom: 12px;
}
.modal-row {
  display: flex; justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.modal-row:last-child { border-bottom: none; }
.modal-row-label { color: var(--muted); }
.modal-close {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  padding: 10px;
  cursor: pointer;
  margin-top: 14px;
}

.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: 6px;
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.skeleton-row {
  height: 52px;
  margin-bottom: 6px;
  border-radius: var(--radius);
}

.chart-section {
  margin: 16px 14px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px 10px;
}
.chart-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 12px;
}
.chart-wrap {
  position: relative;
  width: 100%;
  max-height: 140px;
  overflow: visible;
}
.chart-wrap svg {
  display: block;
  width: 100%;
  max-height: 140px;
  overflow: visible;
}

.chart-y-label {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--muted);
}

.chart-grid {
  stroke: var(--border);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.chart-area {
  opacity: .15;
}

.chart-line {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-dot {
  stroke-width: 2;
  stroke: var(--bg);
  cursor: pointer;
  transition: r 120ms ease;
}
.chart-dot-hit {
  cursor: pointer;
}
.chart-tooltip {
  position: absolute;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 9px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
  pointer-events: none;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 120ms ease, transform 120ms ease;
  z-index: 10;
}
.chart-tooltip.show {
  opacity: 1;
  transform: translateY(0);
}

.chart-tooltip .tt-date {
  color: var(--muted);
  font-size: 10px;
  display: block;
  margin-top: 1px;
}

.chart-suff-label {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--muted);
}

@media (min-width: 480px) {
  #view-login { padding: 48px 20px; }
  .modal { border-radius: 16px; margin-bottom: 20px; }
}

.smart-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 14px 0;
}

@media (min-width: 640px) {
  .smart-bar {
    flex-direction: row;
    align-items: stretch;
    padding: 16px 16px 0;
    gap: 12px;
  }
  .smart-bar-chart {
    flex: 0 0 44%;
    min-width: 0;
  }
  .smart-bar-chart .chart-section {
    margin: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
  }
  .smart-bar-chart .chart-wrap {
    flex: 1;
    max-height: none;
  }
  .smart-bar-chart .chart-wrap svg {
    max-height: none;
    height: 100%;
  }
  .smart-bar-tools {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
  }
  .smart-bar-tools .goal-section {
    margin: 0;
    flex: 1;
  }
}