/* =========================================================
   NE0-OBSIDIAN BOARD UI v1.0
   - Glass-Metal + Neon Engrave + Aurora Edge
   - Mobile optimized
   ========================================================= */

/* ---- Root tokens ---- */
:root{
  --bg0:#07080a;
  --bg1:#0b0d12;
  --bg2:#0f1320;
  --panel: rgba(20,22,28,.66);
  --panel2: rgba(14,16,22,.78);
  --line: rgba(255,255,255,.06);
  --line2: rgba(0,0,0,.55);
  --txt:#e7eaf1;
  --muted:#9aa3b2;
  --muted2:#6e7685;

  --neoA:#8ef7ff;
  --neoB:#9a7bff;
  --neoC:#35ff9e;
  --neoD:#5865F2;

  --shadow: 0 18px 60px rgba(0,0,0,.55);
  --shadow2: 0 10px 35px rgba(0,0,0,.45);
  --inset: inset 0 1px 0 rgba(255,255,255,.06), inset 0 -1px 0 rgba(0,0,0,.65);
  --radius: 18px;
  --radius2: 14px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  background: radial-gradient(1200px 700px at 20% 10%, rgba(154,123,255,.14), transparent 60%),
              radial-gradient(900px 650px at 80% 30%, rgba(142,247,255,.10), transparent 60%),
              radial-gradient(1000px 700px at 60% 85%, rgba(53,255,158,.08), transparent 60%),
              linear-gradient(135deg, var(--bg0), var(--bg2));
  color: var(--txt);
  overflow-x:hidden;
}

/* ---- Subtle noise + vignette overlay (super premium feel) ---- */
body:before{
  content:"";
  position:fixed; inset:0;
  pointer-events:none;
  background:
    radial-gradient(1200px 700px at 50% 10%, rgba(255,255,255,.06), transparent 55%),
    radial-gradient(1200px 900px at 50% 120%, rgba(0,0,0,.55), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='320'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  opacity:.28;
}

/* =========================================================
   TOPBAR (engraved line + halo)
   ========================================================= */
.topbar{
  height:56px;
  background: linear-gradient(180deg, rgba(18,20,26,.92), rgba(12,13,16,.78));
  border-bottom: 1px solid rgba(255,255,255,.06);
  box-shadow:
    0 1px 0 rgba(255,255,255,.05),
    0 12px 35px rgba(0,0,0,.45);
  display:flex;
  align-items:center;
  padding: 0 18px;
  justify-content:flex-end;
  flex-shrink:0;
  position:sticky; top:0;
  z-index:50;
  backdrop-filter: blur(14px) saturate(130%);
}
.topbar:after{
  content:"";
  position:absolute; left:0; right:0; bottom:-1px; height:2px;
  background: linear-gradient(90deg, transparent, rgba(142,247,255,.22), rgba(154,123,255,.20), transparent);
  opacity:.55;
  filter: blur(.2px);
}

/* =========================================================
   BOARD CONTAINER
   ========================================================= */
.board-container{
  width:100%;
  min-height:100%;
  display:flex;
  flex-direction:column;
  padding: 26px;
  padding-top: 26px; /* topbar sticky라 공간 추가 필요 없음 */
  overflow-y:auto;
}

/* =========================================================
   HEADER (engraved + neon title)
   ========================================================= */
.board-header{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  margin: 6px 0 20px;
  gap: 12px;
  flex-wrap:wrap;

  padding: 14px 14px 18px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16,18,24,.62), rgba(10,11,14,.30));
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: var(--shadow2), var(--inset);
  position:relative;
  overflow:hidden;
}
.board-header:before{
  content:"";
  position:absolute; inset:-2px;
  background:
    radial-gradient(500px 120px at 15% 0%, rgba(142,247,255,.18), transparent 60%),
    radial-gradient(500px 120px at 85% 0%, rgba(154,123,255,.14), transparent 60%),
    linear-gradient(90deg, rgba(255,255,255,.06), transparent 35%, transparent 65%, rgba(255,255,255,.05));
  opacity:.85;
  pointer-events:none;
}
.board-header:after{
  content:"";
  position:absolute; left:14px; right:14px; bottom:10px; height:1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.09), transparent);
  opacity:.75;
}

.board-title{
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.7px;
  text-transform: uppercase;

  background: linear-gradient(90deg, #fff, rgba(142,247,255,.95), rgba(154,123,255,.92));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  text-shadow:
    0 0 22px rgba(142,247,255,.22),
    0 0 34px rgba(154,123,255,.16);
}

/* =========================================================
   BUTTONS (premium neon / micro-scanline)
   ========================================================= */
.btn-group{ display:flex; gap: 10px; align-items:center; }

.btn-write{
  position:relative;
  border:none;
  color:#fff;
  padding: 10px 18px;
  border-radius: 999px;
  cursor:pointer;
  font-weight: 900;
  font-size: 13px;
  letter-spacing:.2px;

  background:
    radial-gradient(120px 70px at 30% 20%, rgba(255,255,255,.20), transparent 60%),
    linear-gradient(135deg, rgba(88,101,242,1), rgba(154,123,255,.95));
  box-shadow:
    0 14px 35px rgba(88,101,242,.28),
    0 6px 18px rgba(154,123,255,.16);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  overflow:hidden;
}
.btn-write:before{
  content:"";
  position:absolute; inset:-2px;
  background: linear-gradient(90deg, transparent, rgba(142,247,255,.45), transparent);
  transform: translateX(-120%);
  filter: blur(1px);
  opacity:.9;
}
.btn-write:after{
  /* micro scanline */
  content:"";
  position:absolute; inset:0;
  background: repeating-linear-gradient(
    180deg,
    rgba(255,255,255,.06) 0px,
    rgba(255,255,255,.06) 1px,
    transparent 2px,
    transparent 6px
  );
  opacity:.18;
  mix-blend-mode: overlay;
  pointer-events:none;
}
.btn-write:hover{
  transform: translateY(-2px);
  filter:saturate(1.1);
  box-shadow:
    0 18px 46px rgba(88,101,242,.34),
    0 10px 26px rgba(154,123,255,.20);
}
.btn-write:hover:before{ transform: translateX(120%); transition: transform .65s ease; }
.btn-write:active{ transform: translateY(0px) scale(.99); }

.btn-back{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.10);
  color: var(--muted);
  padding: 10px 14px;
  border-radius: 999px;
  cursor:pointer;
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow: 0 10px 26px rgba(0,0,0,.25), var(--inset);
  transition: transform .18s ease, border-color .18s ease;
}
.btn-back:hover{
  transform: translateY(-1px);
  border-color: rgba(142,247,255,.24);
}

/* edit/del */
.btn-edit, .btn-del{
  padding: 7px 12px;
  border-radius: 12px;
  cursor:pointer;
  font-size: 12px;
  font-weight: 900;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
  backdrop-filter: blur(10px);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.btn-edit{
  color: rgba(53,255,158,.95);
  box-shadow: 0 10px 25px rgba(53,255,158,.06);
}
.btn-del{
  color: rgba(255,99,99,.95);
  box-shadow: 0 10px 25px rgba(255,99,99,.06);
}
.btn-edit:hover{ transform: translateY(-1px); border-color: rgba(53,255,158,.35); }
.btn-del:hover { transform: translateY(-1px); border-color: rgba(255,99,99,.35); }

/* =========================================================
   LIST
   ========================================================= */
.board-list{ display:flex; flex-direction:column; gap: 10px; }

/* Ambient border glow frame */
.board-item{
  position:relative;
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 16px 18px;
  border-radius: var(--radius2);
  cursor:pointer;

  background:
    radial-gradient(420px 140px at var(--mx,30%) var(--my,30%), rgba(142,247,255,.12), transparent 60%),
    radial-gradient(420px 140px at calc(var(--mx,30%) + 18%) calc(var(--my,30%) + 12%), rgba(154,123,255,.10), transparent 62%),
    linear-gradient(180deg, rgba(20,22,28,.72), rgba(12,13,16,.55));
  border: 1px solid rgba(255,255,255,.07);
  box-shadow: 0 14px 36px rgba(0,0,0,.38);
  backdrop-filter: blur(16px) saturate(130%);
  overflow:hidden;

  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

/* Aurora edge */
.board-item:before{
  content:"";
  position:absolute; inset:-2px;
  background: conic-gradient(from 180deg at 50% 50%,
    rgba(142,247,255,.0),
    rgba(142,247,255,.26),
    rgba(154,123,255,.22),
    rgba(53,255,158,.18),
    rgba(142,247,255,.0)
  );
  opacity:.0;
  filter: blur(8px);
  transition: opacity .18s ease;
  pointer-events:none;
}

/* Glass highlight + micro texture */
.board-item:after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(120deg, rgba(255,255,255,.10), transparent 35%, transparent 70%, rgba(255,255,255,.06)),
    repeating-linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.04) 1px, transparent 2px, transparent 7px);
  opacity:.22;
  mix-blend-mode: overlay;
  pointer-events:none;
}

.board-item:hover{
  transform: translateY(-2px) scale(1.004);
  border-color: rgba(142,247,255,.24);
  box-shadow: 0 20px 55px rgba(0,0,0,.50);
}
.board-item:hover:before{ opacity:.85; }

.b-id{
  width: 70px;
  font-weight: 900;
  color: rgba(142,247,255,.95);
  text-shadow: 0 0 18px rgba(142,247,255,.25);
  opacity:.95;
}
.b-title{
  flex:1;
  font-weight: 800;
  color:#fff;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  letter-spacing:-.2px;
}
.b-writer{
  width: 120px;
  text-align:right;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.b-date{
  width: 80px;
  text-align:right;
  color: var(--muted2);
  font-size: 12px;
  font-weight: 700;
}

/* =========================================================
   VIEW / WRITE
   ========================================================= */
#viewPage, #writePage{
  display:none;
  flex-direction:column;
  gap: 18px;
  animation: neoFade .28s ease;
}

.view-meta{
  display:flex; gap: 14px; flex-wrap:wrap;
  font-size: 13px;
  color: var(--muted);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.08);
  padding: 10px 12px;
  border-radius: 14px;
  width: fit-content;
  box-shadow: 0 14px 35px rgba(0,0,0,.24), var(--inset);
  backdrop-filter: blur(14px);
}

.view-box{
  background:
    radial-gradient(520px 220px at 30% 0%, rgba(142,247,255,.10), transparent 60%),
    radial-gradient(520px 220px at 80% 0%, rgba(154,123,255,.08), transparent 60%),
    linear-gradient(180deg, rgba(14,16,22,.80), rgba(10,10,12,.62));
  padding: 26px;
  border-radius: var(--radius);
  min-height: 320px;
  white-space: pre-wrap;
  color: rgba(231,234,241,.92);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: var(--shadow), var(--inset);
  position:relative;
    padding-bottom: 40px;   /* 하단 여유 확보 */
}
.view-box:before{
  content:"";
  position:absolute; inset:-2px;
  background: radial-gradient(520px 240px at var(--mx,35%) var(--my,20%), rgba(142,247,255,.10), transparent 60%);
  opacity:.75;
  pointer-events:none;
  filter: blur(4px);
}

.input-title, .input-content{
  background:
    radial-gradient(420px 160px at 30% 10%, rgba(142,247,255,.08), transparent 60%),
    linear-gradient(180deg, rgba(12,14,18,.88), rgba(8,9,10,.72));
  border: 1px solid rgba(255,255,255,.10);
  border-bottom-color: rgba(255,255,255,.16);
  color:#fff;
  padding: 14px 16px;
  border-radius: var(--radius);
  width:100%;
  font-size: 15px;
  box-shadow: 0 18px 45px rgba(0,0,0,.40), var(--inset);
  outline:none;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.input-title:focus, .input-content:focus{
  border-color: rgba(142,247,255,.28);
  box-shadow: 0 22px 60px rgba(0,0,0,.48), 0 0 0 3px rgba(142,247,255,.10);
}

.input-content{
  height: 768px;
  resize:none;
  line-height: 1.65;
}

/* =========================================================
   LOADING / EMPTY
   ========================================================= */
.neo-center{
  text-align:center;
  padding: 50px 10px;
  color: var(--muted2);
}
.neo-badge{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 14px 35px rgba(0,0,0,.22), var(--inset);
  backdrop-filter: blur(12px);
}

/* =========================================================
   MOBILE
   ========================================================= */
@media (max-width: 768px){
  .board-container{ padding: 16px; }
  .b-id{ display:none !important; }
  .b-writer{
    width:auto !important;
    max-width: 64px;
    font-size: 11px;
    white-space: nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
    color: var(--muted2);
  }
  .b-date{
    width:auto !important;
    font-size: 11px;
    margin-left: 6px;
  }
  .b-title{
    flex:1 !important;
    min-width:0;
    font-size: 14px;
  }
  .board-item{
    padding: 12px 12px !important;
  }
  .btn-write, .btn-back{ padding: 10px 14px; }
}

/* =========================================================
   ANIMATIONS
   ========================================================= */
@keyframes neoFade{
  from{ opacity:0; transform: translateY(10px); }
  to{ opacity:1; transform: translateY(0); }
}