/* ══════════════════════════════════════════════════════════════
   IU Notenrechner – Stylesheet
   ══════════════════════════════════════════════════════════════ */

:root {
  --bg: #0f0f11;
  --surface: #17171a;
  --surface2: #1e1e23;
  --surface3: #242430;
  --border: #2a2a32;
  --accent: #c8f055;
  --accent2: #5566ff;
  --accent3: #ff9966;
  --text: #e8e8f0;
  --text-muted: #6a6a7a;
  --text-dim: #3a3a4a;
  --pass: #4ade80;
  --fail: #f87171;
  --warn: #fbbf24;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

/* ── Login Screen ─────────────────────────────────────────────── */
.login-screen {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
}

.login-logo { margin-bottom: 28px; }
.login-logo h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 32px;
  color: var(--accent);
  letter-spacing: -1px;
  line-height: 1;
}
.login-logo .sub {
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 4px;
}

.login-error {
  color: var(--fail);
  font-size: 12px;
  margin-bottom: 10px;
  display: none;
}

/* ── Main App ─────────────────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

/* ── Header ───────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 16px;
}

.logo h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 36px;
  line-height: 1;
  color: var(--accent);
  letter-spacing: -1px;
}
.logo .sub {
  color: var(--text-muted);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 4px;
}
.logo .apo-badge {
  display: inline-block;
  margin-top: 6px;
  padding: 3px 10px;
  background: rgba(200,240,85,0.1);
  border: 1px solid rgba(200,240,85,0.3);
  border-radius: 20px;
  font-size: 11px;
  color: var(--accent);
}

.header-right { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.header-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }

/* ── Program Selector ─────────────────────────────────────────── */
.program-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.program-bar .label {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  white-space: nowrap;
}

.program-tab {
  padding: 6px 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.program-tab:hover { border-color: var(--accent); color: var(--accent); }
.program-tab.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,240,85,0.08);
}

.program-bar-spacer { flex: 1; }

/* ── User Info / Logout ───────────────────────────────────────── */
.user-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.user-bar .username { color: var(--text); }

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: #0f0f11; border-color: var(--accent); font-weight: 500; }
.btn.primary:hover { background: #d4f566; }
.btn.danger:hover { border-color: var(--fail); color: var(--fail); }
.btn.small { padding: 6px 12px; font-size: 12px; }
.btn.xs { padding: 4px 9px; font-size: 11px; }
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1;
  transition: all 0.15s;
}
.icon-btn:hover { color: var(--fail); background: rgba(248,113,113,0.1); }
.icon-btn.edit:hover { color: var(--accent); background: rgba(200,240,85,0.1); }

/* ── Stats Bar ────────────────────────────────────────────────── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.4;
}
.stat-card .label {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.stat-card .value {
  font-family: 'DM Serif Display', serif;
  font-size: 30px;
  line-height: 1;
  color: var(--accent);
}
.stat-card .sub { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* ── Tabs ─────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.tab {
  padding: 10px 20px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 13px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.panel { display: none; }
.panel.active { display: block; }

/* ── Semester ─────────────────────────────────────────────────── */
.semester-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
}
.semester-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  gap: 12px;
  flex-wrap: wrap;
}
.semester-header:hover { background: var(--surface2); }
.semester-info { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.semester-name { font-family: 'DM Serif Display', serif; font-size: 20px; }
.semester-stats { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  border: 1px solid currentColor;
}
.badge.grade { color: var(--accent); border-color: var(--accent); background: rgba(200,240,85,0.08); }
.badge.ects  { color: var(--accent2); border-color: var(--accent2); background: rgba(85,102,255,0.08); }
.badge.mods  { color: var(--text-muted); border-color: var(--border); }
.chevron { transition: transform 0.2s; color: var(--text-muted); font-size: 18px; }
.semester-section.collapsed .chevron { transform: rotate(-90deg); }
.semester-body { padding: 0 16px 16px; }
.semester-section.collapsed .semester-body { display: none; }

/* ── Module Card ──────────────────────────────────────────────── */
.module-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
}
.module-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  background: var(--surface2);
  gap: 10px;
  flex-wrap: wrap;
}
.module-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  flex-wrap: wrap;
}
.module-title-input {
  background: transparent;
  border: none;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  outline: none;
  flex: 1;
  min-width: 100px;
}
.module-title-input::placeholder { color: var(--text-dim); }
.module-type-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}
.type-simple   { background: rgba(200,240,85,0.1);  color: var(--accent);  border: 1px solid rgba(200,240,85,0.3); }
.type-ce       { background: rgba(255,153,102,0.1); color: var(--accent3); border: 1px solid rgba(255,153,102,0.3); }
.type-teilmodul{ background: rgba(85,102,255,0.1);  color: var(--accent2); border: 1px solid rgba(85,102,255,0.3); }
.module-result { font-family: 'DM Serif Display', serif; font-size: 18px; white-space: nowrap; }
.module-actions { display: flex; gap: 6px; align-items: center; }

/* ── CE Entry ─────────────────────────────────────────────────── */
.ce-container { padding: 12px 16px; }
.ce-section-title {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ce-section-title span { flex: 1; height: 1px; background: var(--border); }
.ce-weight-info { font-size: 11px; color: var(--accent3); }
.ce-result-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--surface3);
  border-radius: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.weight-edit { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-muted); }
.weight-edit input { width: 54px; }

/* ── APO Calc ─────────────────────────────────────────────────── */
.apo-calc {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(200,240,85,0.04);
  border: 1px solid rgba(200,240,85,0.15);
  border-radius: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.apo-calc .pct-label  { font-size: 11px; color: var(--text-muted); }
.apo-calc .pct-val    { font-family: 'DM Serif Display', serif; font-size: 18px; color: var(--accent); }
.apo-calc .arrow      { color: var(--text-dim); }
.apo-calc .note-val   { font-family: 'DM Serif Display', serif; font-size: 18px; }
.apo-calc .note-label { font-size: 11px; color: var(--text-muted); }
.apo-calc .calc-detail { font-size: 12px; color: var(--text-muted); font-style: italic; }

/* ── Teilmodul ────────────────────────────────────────────────── */
.teilmodul-container { padding: 10px 16px; }
.teilmodul-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  overflow: hidden;
}
.teilmodul-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: rgba(85,102,255,0.05);
  flex-wrap: wrap;
}
.teilmodul-name-input {
  background: transparent;
  border: none;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  outline: none;
  flex: 1;
  min-width: 80px;
}
.teilmodul-name-input::placeholder { color: var(--text-dim); }
.teilmodul-ects {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--accent2);
  white-space: nowrap;
}
.teilmodul-ects input { width: 48px; }
.teilmodul-note { font-family: 'DM Serif Display', serif; font-size: 16px; white-space: nowrap; }
.teilmodul-body { padding: 8px 14px 12px; }

/* ── APO Reference Panel ──────────────────────────────────────── */
.apo-ref {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 14px;
}
.apo-ref h3 { font-family: 'DM Serif Display', serif; font-size: 18px; margin-bottom: 14px; }
.apo-table { width: 100%; border-collapse: collapse; }
.apo-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.apo-table td { padding: 8px 12px; border-bottom: 1px solid rgba(42,42,50,0.5); font-size: 13px; }
.apo-table tr:last-child td { border-bottom: none; }
.apo-table tr.highlight td { background: rgba(200,240,85,0.06); }

/* ── Charts ───────────────────────────────────────────────────── */
.chart-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 14px;
}
.chart-container h3 { font-family: 'DM Serif Display', serif; font-size: 18px; margin-bottom: 18px; }
.chart-wrap { height: 260px; position: relative; }

/* ── Admin Panel ──────────────────────────────────────────────── */
.admin-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 14px;
}
.admin-panel h3 { font-family: 'DM Serif Display', serif; font-size: 18px; margin-bottom: 16px; }

.user-table { width: 100%; border-collapse: collapse; }
.user-table th {
  text-align: left;
  padding: 8px 12px;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.user-table td { padding: 10px 12px; border-bottom: 1px solid rgba(42,42,50,0.5); font-size: 13px; }
.user-table tr:last-child td { border-bottom: none; }
.user-table tr:hover td { background: rgba(255,255,255,0.02); }

.role-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
}
.role-admin   { background: rgba(200,240,85,0.12); color: var(--accent);  border: 1px solid rgba(200,240,85,0.3); }
.role-student { background: rgba(85,102,255,0.12); color: var(--accent2); border: 1px solid rgba(85,102,255,0.3); }

/* ── Shared Inputs ────────────────────────────────────────────── */
input[type="text"],
input[type="number"],
input[type="password"],
input[type="email"],
select {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  padding: 7px 10px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
input:focus, select:focus { border-color: var(--accent); }
input[type="number"] { -moz-appearance: textfield; }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
select option { background: var(--surface2); }

/* ── Note colors ──────────────────────────────────────────────── */
.g1 { color: #4ade80; }
.g2 { color: #86efac; }
.g3 { color: var(--warn); }
.g4 { color: #fb923c; }
.g5 { color: var(--fail); }
.g- { color: var(--text-muted); }

.status-pass {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  background: rgba(74,222,128,0.12);
  color: var(--pass);
  border: 1px solid var(--pass);
}
.status-fail {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  background: rgba(248,113,113,0.12);
  color: var(--fail);
  border: 1px solid var(--fail);
}

/* ── Modals ───────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 100;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 90%;
  max-width: 460px;
}
.modal h3 { font-family: 'DM Serif Display', serif; font-size: 22px; margin-bottom: 20px; }
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }
.radio-group { display: flex; gap: 8px; flex-wrap: wrap; }
.radio-opt { flex: 1; min-width: 100px; }
.radio-opt input { display: none; }
.radio-opt label {
  display: block;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  font-size: 12px;
  transition: all 0.15s;
}
.radio-opt input:checked + label {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,240,85,0.08);
}
.radio-opt label:hover { border-color: var(--accent); }

/* ── Empty / Notifications ────────────────────────────────────── */
.empty { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty .icon { font-size: 38px; margin-bottom: 12px; opacity: 0.4; }

.notif {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: #0f0f11;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  z-index: 200;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
}
.notif.show { transform: translateY(0); opacity: 1; }

/* ── Simulationsmodus ────────────────────────────────────────── */

/* Banner oben */
.sim-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 18px;
  background: rgba(251,191,36,0.1);
  border: 1px solid rgba(251,191,36,0.4);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--warn);
  flex-wrap: wrap;
}
.sim-banner strong { color: var(--warn); }

/* Stat-Karte im Sim-Modus */
.stat-card-sim::before { background: var(--warn); }
.stat-card-sim .label { color: var(--warn); opacity: 0.8; }

/* Szenario-Stat-Karten (Best/Worst Case) */
.stat-card-scenario::before { background: var(--accent2); opacity: 0.3; }
.stat-card-scenario .label  { color: var(--text-muted); font-size: 10px; }
.stat-card-scenario .value  { color: var(--text-muted); }

/* Modul-Karte im Sim-Modus aktiv */
.module-card.sim-active { border-color: rgba(251,191,36,0.5); }
.module-card.sim-active .module-card-header { background: rgba(251,191,36,0.06); }

/* SIM-Badge neben der Note */
.sim-badge {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 500;
  background: rgba(251,191,36,0.15);
  color: var(--warn);
  border: 1px solid rgba(251,191,36,0.4);
  letter-spacing: 0.5px;
}

/* Sim-Eingabezeile am unteren Rand jeder Modul-Karte */
.sim-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-top: 1px dashed rgba(251,191,36,0.3);
  background: rgba(251,191,36,0.04);
  flex-wrap: wrap;
}
.sim-row-label {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--warn);
  white-space: nowrap;
  min-width: 48px;
}
.sim-row-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sim-row-inputs input {
  width: 130px;
  border-color: rgba(251,191,36,0.4);
}
.sim-row-inputs input:focus { border-color: var(--warn); }
.sim-row-real {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  white-space: nowrap;
}

/* Sim-Modus Button aktiv */
.sim-active-btn {
  border-color: var(--warn) !important;
  color: var(--warn) !important;
  background: rgba(251,191,36,0.1) !important;
}

/* ── Loading indicator ────────────────────────────────────────── */
.loading {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
  font-size: 13px;
}
.loading::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-left: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 600px) {
  .ce-inputs { grid-template-columns: 1fr 1fr; }
  .header-right { align-items: flex-start; }
}