/* --- Reset & base --- */
*{box-sizing:border-box}
:root{
  --bg1:#0f172a;
  --bg2:#111827;
  --accent:#60a5fa;
  --accent-2:#a78bfa;
  --good:#22c55e;
  --bad:#ef4444;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --input-bg:#0b1220;
  --input-border:#1f2937;
  --card-bg:rgba(0,0,0,0.1);
  --header-bg:rgba(0,0,0,0.2);
}

/* Light mode */
body.light-mode{
  --bg1:#f8fafc;
  --bg2:#e2e8f0;
  --accent:#3b82f6;
  --accent-2:#8b5cf6;
  --good:#16a34a;
  --bad:#dc2626;
  --text:#1e293b;
  --muted:#64748b;
  --glass: rgba(255,255,255,0.7);
  --glass-border: rgba(148,163,184,0.3);
  --input-bg:#ffffff;
  --input-border:#cbd5e1;
  --card-bg:rgba(241,245,249,0.5);
  --header-bg:rgba(226,232,240,0.5);
}

body.light-mode {
  background: radial-gradient(1200px 800px at 20% -10%, #cbd5e1 0%, transparent 60%), linear-gradient(180deg, var(--bg1), var(--bg2) 60%);
}

body.light-mode .bg::before, 
body.light-mode .bg::after{
  background: radial-gradient(600px 500px at 85% 20%, rgba(59,130,246,0.08), transparent 60%),
              radial-gradient(500px 400px at 10% 90%, rgba(139,92,246,0.06), transparent 60%);
}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color:var(--text);
  background: radial-gradient(1200px 800px at 20% -10%, #1e293b 0%, transparent 60%), linear-gradient(180deg, var(--bg1), var(--bg2) 60%);
  overflow-x:hidden;
}
.bg::before, .bg::after{
  content:"";
  position:fixed; inset:-100px;
  background: radial-gradient(600px 500px at 85% 20%, rgba(96,165,250,0.12), transparent 60%),
              radial-gradient(500px 400px at 10% 90%, rgba(167,139,250,0.10), transparent 60%);
  z-index:-1;
  filter: blur(2px);
}

.site-header{
  text-align:center; 
  padding:32px 16px 8px;
}

h1{margin:0 0 8px; font-weight:800; letter-spacing:.2px}
.tagline{margin:0; color:var(--muted)}

.container{
  max-width:1200px; 
  margin: 0 auto; 
  padding: 20px;
}

.glass{
  background: var(--glass);
  border:1px solid var(--glass-border);
  border-radius:20px;
  box-shadow: 0 10px 40px rgba(0,0,0,.25);
  backdrop-filter: blur(8px);
}

.form-section{ 
  padding:24px; 
}

.table-header{
  display: grid;
  grid-template-columns: 50px repeat(4, 1fr);
  gap: 8px;
  padding: 12px 8px;
  background: var(--header-bg);
  border-radius: 12px;
  margin-bottom: 12px;
}

.col-label{
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-align: center;
}

#wordForms{
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.word-row{
  display: grid;
  grid-template-columns: 50px repeat(4, 1fr);
  gap: 8px;
  align-items: center;
  padding: 8px;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.word-row:hover{
  border-color: var(--glass-border);
}

.word-number{
  text-align: center;
  font-weight: 600;
  color: var(--accent);
  font-size: 14px;
}

.word-input{
  display: flex;
}
input{
  width: 100%;
  font: inherit;
  font-size: 14px;
  color:var(--text);
  background:var(--input-bg);
  border:1px solid var(--input-border);
  border-radius:10px;
  padding:10px 12px;
  outline:none;
  transition: border .2s ease, background .2s ease, box-shadow .2s ease;
}
input:focus{ 
  border-color: var(--accent); 
  box-shadow: 0 0 0 3px rgba(96,165,250,.12);
}
input.good{ 
  border-color: var(--good); 
  background: rgba(34,197,94,.08);
}
input.bad{ 
  border-color: var(--bad); 
  background: rgba(239,68,68,.08);
}
input[readonly]{ 
  opacity:.9; 
  cursor: not-allowed;
}
input.given-form{
  background: var(--header-bg);
  border: 2px solid var(--accent);
  font-weight: 600;
  color: var(--accent);
  cursor: default;
}
body.light-mode input.given-form{
  background: var(--header-bg);
  border: 2px solid var(--accent);
}

.actions{ 
  display:flex; 
  gap:10px; 
  margin: 20px 0 16px; 
  flex-wrap:wrap;
  justify-content: center;
  align-items: center;
}

.theme-btn{
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: auto;
}

.theme-btn .icon-sun{
  display: none;
}

body.light-mode .theme-btn .icon-sun{
  display: inline;
}

body.light-mode .theme-btn .icon-moon{
  display: none;
}

.timer-display{
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
  color: var(--text);
  font-size: 16px;
}

.timer-icon{
  font-size: 18px;
}
.btn{
  appearance:none; border:none; cursor:pointer;
  padding:12px 16px; border-radius:12px; font-weight:700;
  background:#0f172a; color:var(--text); border:1px solid var(--glass-border);
  transition: transform .05s ease, background .2s ease, border .2s ease;
}
.btn:hover{ background:#111827 }
.btn:active{ transform: translateY(1px) }
.btn.primary{ background: linear-gradient(90deg, rgba(96,165,250,.25), rgba(167,139,250,.25)); border-color:#374151 }
.btn:disabled{ opacity:.6; cursor:not-allowed }

.feedback{ 
  min-height:28px; 
  margin-top:6px; 
  color:var(--muted);
  text-align: center;
  font-size: 15px;
}
.feedback.success{ color: var(--good); font-weight: 600; }
.feedback.partial{ color: var(--accent); }
.feedback.error{ color: var(--bad); }

/* Rules section */
.rules-section{
  margin-top: 40px;
  margin-bottom: 40px;
  padding: 32px;
}

.rules-section h2{
  text-align: center;
  margin: 0 0 32px;
  font-size: 28px;
  color: var(--text);
}

.rule-category{
  margin-bottom: 32px;
}

.rule-category h3{
  color: var(--accent);
  margin: 0 0 16px;
  font-size: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--glass-border);
}

.rule-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.rule-box{
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.rule-box:hover{
  transform: translateY(-2px);
  border-color: var(--accent);
}

.rule-box h4{
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--accent-2);
}

.rule-box p{
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
}

.example{
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  color: var(--text);
  line-height: 1.6;
}

.special-rules{
  border-top: 2px solid var(--glass-border);
  padding-top: 24px;
}

.special-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.special-box{
  background: var(--header-bg);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 20px;
  transition: transform 0.2s ease;
}

.special-box:hover{
  transform: translateY(-2px);
}

.special-box h4{
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--accent);
}

.special-box p{
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
}

.special-box .example{
  background: var(--card-bg);
}

/* Responsive adjustments */
@media(max-width: 768px){
  .table-header{
    display: none;
  }
  
  .word-row{
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px;
  }
  
  .word-number{
    text-align: left;
    font-size: 16px;
    margin-bottom: 4px;
  }
  
  .word-input{
    position: relative;
  }
  
  .word-input::before{
    content: attr(data-label);
    position: absolute;
    left: 12px;
    top: -18px;
    font-size: 11px;
    color: var(--muted);
  }
  
  .word-input:nth-child(2)::before{ content: "Ubunde eintal"; }
  .word-input:nth-child(3)::before{ content: "Bunde eintal"; }
  .word-input:nth-child(4)::before{ content: "Ubunde fleirtal"; }
  .word-input:nth-child(5)::before{ content: "Bunde fleirtal"; }
  
  .rules-section{
    padding: 20px;
  }
  
  .rules-section h2{
    font-size: 22px;
  }
  
  .rule-grid{
    grid-template-columns: 1fr;
  }
  
  .special-grid{
    grid-template-columns: 1fr;
  }
}

/* Print styles */
@media print {
  .bg, .bg::before, .bg::after {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .actions, .timer-display, .feedback, .rules-section {
    display: none !important;
  }
  
  .site-header {
    padding: 20px 0 10px;
  }
  
  .site-header h1 {
    color: black;
    font-size: 24px;
  }
  
  .glass {
    background: white;
    border: 2px solid #333;
    box-shadow: none;
  }
  
  .form-section {
    padding: 20px;
  }
  
  .table-header {
    background: #f0f0f0;
    border: 1px solid #333;
    page-break-after: avoid;
  }
  
  .col-label {
    color: black;
    font-weight: bold;
  }
  
  .word-row {
    background: white;
    border: 1px solid #ddd;
    page-break-inside: avoid;
  }
  
  .word-number {
    color: black;
  }
  
  input {
    background: white;
    border: 1px solid #333;
    color: black;
  }
  
  input.given-form {
    background: #f0f0f0;
    border: 2px solid #666;
    color: black;
    font-weight: bold;
  }
  
  input.good {
    border-color: #4CAF50;
    background: #e8f5e9;
  }
  
  input.bad {
    border-color: #f44336;
    background: #ffebee;
  }
}