:root{
  --bg:#07111f;
  --bg-soft:#0d1b2a;
  --panel:#0f1f33;
  --panel-2:#14253d;
  --panel-3:#182c46;
  --text:#e8eef8;
  --muted:#9fb1c9;
  --line:rgba(255,255,255,.08);
  --primary:#65dccb;
  --accent:#ffbf7a;
  --accent-2:#7ca7ff;
  --danger:#ff6b78;
  --shadow:0 18px 48px rgba(1, 9, 20, .38);
  --radius:22px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{
  font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",system-ui,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 0% 0%, rgba(93,214,197,.18), transparent 28%),
    radial-gradient(circle at 100% 0%, rgba(255,191,122,.14), transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(124,167,255,.10), transparent 30%),
    linear-gradient(180deg, #06101c 0%, #081423 42%, #0b1320 100%);
  position:relative;
  overflow-x:hidden;
}
body::before,
body::after{
  content:'';
  position:fixed;
  pointer-events:none;
  border-radius:999px;
  filter:blur(2px);
  opacity:.72;
}
body::before{
  width:360px;height:360px;
  top:-140px;right:-120px;
  background:radial-gradient(circle, rgba(93,214,197,.10), transparent 68%);
}
body::after{
  width:420px;height:420px;
  bottom:-200px;left:-160px;
  background:radial-gradient(circle, rgba(124,167,255,.10), transparent 70%);
}
a{color:inherit}
input,select,textarea,button{
  font:inherit;
}
.app-shell{
  min-height:100vh;
  display:grid;
  grid-template-columns:280px 1fr;
}
.sidebar{
  padding:24px;
  background:
    linear-gradient(180deg, rgba(6,14,26,.86), rgba(6,14,26,.70)),
    rgba(4,10,18,.72);
  border-right:1px solid var(--line);
  backdrop-filter:blur(18px);
  position:sticky;
  top:0;
  height:100vh;
}
.brand{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 14px 18px;
  border-radius:18px;
  background:linear-gradient(135deg, rgba(93,214,197,.12), rgba(255,184,107,.10));
  border:1px solid var(--line);
}
.brand-mark{
  width:48px;height:48px;border-radius:16px;
  display:grid;place-items:center;
  font-weight:800;
  letter-spacing:.08em;
  color:#06101c;
  background:linear-gradient(135deg, var(--primary), var(--accent));
}
.brand strong{display:block}
.brand span{display:block;color:var(--muted);font-size:.9rem}
.nav{display:grid;gap:8px;margin:18px 0}
.nav a,.btn,.user-pill,.tag,.status,.badge,.flash{
  border-radius:999px;
}
.nav a{
  display:block;
  padding:12px 14px;
  color:var(--muted);
  text-decoration:none;
  border:1px solid transparent;
}
.nav a:hover{
  color:var(--text);
  background:rgba(255,255,255,.04);
  border-color:var(--line);
}
.logout-form{margin-top:16px}
.main{
  padding:28px;
  position:relative;
}
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:24px;
  margin-bottom:22px;
  padding:18px 20px;
  border:1px solid var(--line);
  border-radius:24px;
  background:linear-gradient(180deg, rgba(20,37,61,.92), rgba(12,24,40,.82));
  box-shadow:var(--shadow);
}
.topbar h1{
  margin:6px 0 0;
  font-size:clamp(1.8rem, 4vw, 3.1rem);
  letter-spacing:-.04em;
}
.eyebrow{
  color:var(--primary);
  text-transform:uppercase;
  letter-spacing:.22em;
  font-size:.72rem;
  font-weight:700;
  margin:0;
}
.user-pill{
  display:inline-flex;
  padding:10px 14px;
  background:rgba(255,255,255,.06);
  color:var(--text);
  border:1px solid var(--line);
}
.content{
  display:grid;
  gap:18px;
}
.panel,.card,.metric-card{
  background:linear-gradient(180deg, rgba(20,37,61,.92), rgba(12,24,40,.96));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  border-radius:var(--radius);
}
.panel,.card{padding:22px}
.grid{display:grid;gap:18px}
.metrics{grid-template-columns:repeat(3,minmax(0,1fr))}
.metric-card{padding:20px}
.metric-card span{display:block;color:var(--muted);margin-bottom:8px}
.metric-card strong{font-size:2.4rem;line-height:1}
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
}
.project-grid,.template-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.project-card h3,.template-card h3{margin:12px 0 8px}
.project-card p,.template-card p{color:var(--muted)}
.project-top{
  display:flex;
  justify-content:space-between;
  gap:12px;
}
.tag,.status,.badge{
  display:inline-flex;
  align-items:center;
  padding:6px 12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--text);
}
.status{color:var(--accent)}
.actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:16px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 16px;
  border:1px solid transparent;
  background:rgba(255,255,255,.06);
  color:var(--text);
  text-decoration:none;
  cursor:pointer;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#04101c;font-weight:800}
.btn.secondary{border-color:rgba(93,214,197,.28);background:rgba(93,214,197,.08)}
.btn.ghost{border-color:var(--line)}
.btn.danger{background:linear-gradient(135deg,#ff7a8a,#ff5d5d);color:#fff}
.stack{display:grid;gap:14px}
.columns-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
label{display:grid;gap:8px}
label span{color:var(--muted);font-size:.95rem}
input,select,textarea{
  width:100%;
  padding:13px 14px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.1);
  background:rgba(4,10,18,.54);
  color:var(--text);
}
input:focus,select:focus,textarea:focus{
  outline:none;
  border-color:rgba(93,214,197,.56);
  box-shadow:0 0 0 4px rgba(93,214,197,.12);
}
table{width:100%;border-collapse:collapse}
th,td{
  padding:14px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
th{color:var(--muted);font-weight:600}
.row-actions{display:flex;gap:12px;flex-wrap:wrap}
.flash{
  padding:14px 16px;
  border:1px solid var(--line);
  margin-bottom:14px;
}
.flash.success{background:rgba(93,214,197,.12);color:#c8fff5}
.flash.error{background:rgba(255,107,120,.12);color:#ffd0d6}
.auth-layout{
  min-height:calc(100vh - 56px);
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(360px,.8fr);
  gap:28px;
  align-items:center;
  padding:28px 0 16px;
  position:relative;
}
.auth-layout::before{
  content:'';
  position:absolute;
  inset:0;
  border-radius:32px;
  background:
    radial-gradient(circle at 18% 18%, rgba(101,220,203,.16), transparent 25%),
    radial-gradient(circle at 82% 12%, rgba(255,191,122,.16), transparent 28%),
    linear-gradient(135deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  pointer-events:none;
}
.auth-copy{
  position:relative;
  z-index:1;
  padding:36px 8px 36px 12px;
}
.auth-copy h2{
  font-size:clamp(2rem, 4vw, 4rem);
  line-height:1.05;
  letter-spacing:-.04em;
  margin:10px 0 14px;
  max-width:12ch;
  text-wrap:balance;
}
.auth-lead{
  max-width:42rem;
  color:var(--muted);
  font-size:1.02rem;
  line-height:1.8;
}
.feature-list{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}
.feature-list span{
  display:inline-flex;
  padding:10px 14px;
  border-radius:999px;
  background:linear-gradient(135deg, rgba(101,220,203,.12), rgba(124,167,255,.10));
  border:1px solid var(--line);
  box-shadow:0 10px 24px rgba(1,9,20,.16);
}
.auth-stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
  margin-top:22px;
  max-width:52rem;
}
.auth-stat{
  padding:16px 16px 14px;
  border-radius:18px;
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(20,37,61,.66), rgba(12,24,40,.52));
  box-shadow:0 14px 34px rgba(1, 9, 20, .18);
}
.auth-stat strong{
  display:block;
  margin-bottom:6px;
  font-size:1rem;
}
.auth-stat span{
  display:block;
  color:var(--muted);
  font-size:.84rem;
  line-height:1.5;
}
.auth-card{
  position:relative;
  overflow:hidden;
  max-width:520px;
  justify-self:end;
  width:100%;
  padding:28px;
  background:
    radial-gradient(circle at top right, rgba(255,191,122,.12), transparent 28%),
    linear-gradient(180deg, rgba(20,37,61,.96), rgba(12,24,40,.98));
  backdrop-filter:blur(16px);
}
.auth-card::before{
  content:'';
  position:absolute;
  inset:12px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.05);
  pointer-events:none;
}
.auth-card-kicker{
  display:inline-flex;
  margin-bottom:10px;
  padding:7px 12px;
  border-radius:999px;
  background:rgba(101,220,203,.12);
  color:#c8fff5;
  border:1px solid rgba(101,220,203,.18);
  font-size:.76rem;
  letter-spacing:.16em;
  font-weight:800;
  text-transform:uppercase;
}
.auth-card h1{
  margin:0 0 18px;
  font-size:2rem;
  letter-spacing:-.04em;
}
.auth-card .stack{
  position:relative;
  z-index:1;
}
.preview-toolbar,.project-toolbar{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:space-between;
  align-items:center;
}
.preview-switch{display:flex;gap:10px;flex-wrap:wrap}
.preview-frame-wrap{
  padding:18px;
  background:rgba(2,7,14,.8);
  border-radius:22px;
  border:1px solid var(--line);
  overflow:auto;
}
.preview-frame{
  width:100%;
  height:980px;
  border:0;
  border-radius:18px;
  background:#fff;
  transition:width .18s ease;
}
pre{
  white-space:pre-wrap;
  word-break:break-word;
  color:#d7e3f4;
  background:rgba(4,10,18,.58);
  padding:14px;
  border-radius:16px;
  border:1px solid var(--line);
  overflow:auto;
}
details.card summary{
  cursor:pointer;
}
@media (max-width: 1100px){
  .app-shell{grid-template-columns:1fr}
  .sidebar{
    position:relative;
    height:auto;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .metrics,.project-grid,.template-grid,.columns-2,.auth-layout,.auth-stats{grid-template-columns:1fr}
  .auth-card{justify-self:stretch;max-width:none}
}
@media (max-width: 720px){
  .main{padding:16px}
  .topbar{align-items:flex-start;flex-direction:column}
  .project-toolbar,.preview-toolbar,.section-head{align-items:flex-start;flex-direction:column}
  .preview-frame{height:760px}
  .auth-copy{padding:24px 4px}
}