/* ════════════════════════════════════════
   모두함께 v2 — Master Stylesheet
   Light/Dark auto, fully responsive
   ════════════════════════════════════════ */

/* ── CSS Variables ──────────────────────── */
:root {
  --bg:          #f0f4ff;
  --card:        #ffffff;
  --card2:       #f8faff;
  --text:        #111827;
  --subtext:     #6b7280;
  --primary:     #4f46e5;
  --primary-h:   #4338ca;
  --primary-d:   #3730a3;
  --accent:      #06b6d4;
  --success:     #10b981;
  --danger:      #ef4444;
  --warning:     #f59e0b;
  --border:      #e2e8f0;
  --shadow:      0 4px 20px rgba(17,24,39,.07);
  --shadow-lg:   0 12px 40px rgba(17,24,39,.13);
  --radius:      14px;
  --radius-sm:   8px;
  --ring:        rgba(79,70,229,.22);
  --header-bg:   rgba(255,255,255,.88);
  --header-blur: blur(14px) saturate(160%);
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:         #0d1117;
    --card:       #161b27;
    --card2:      #1c2233;
    --text:       #e2e8f0;
    --subtext:    #8b949e;
    --primary:    #818cf8;
    --primary-h:  #6366f1;
    --primary-d:  #4f46e5;
    --accent:     #22d3ee;
    --border:     #21293d;
    --shadow:     0 4px 24px rgba(0,0,0,.3);
    --shadow-lg:  0 16px 48px rgba(0,0,0,.45);
    --ring:       rgba(129,140,248,.25);
    --header-bg:  rgba(13,17,23,.88);
  }
}

/* ── Reset ──────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
body{
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  min-height:100vh;
}

/* ── Header / Nav ───────────────────────── */
header{
  position:sticky;top:0;z-index:100;
  background:var(--header-bg);
  backdrop-filter:var(--header-blur);
  -webkit-backdrop-filter:var(--header-blur);
  border-bottom:1px solid var(--border);
  box-shadow:0 1px 12px rgba(0,0,0,.06);
}
header nav{
  max-width:1100px;margin:0 auto;
  padding:10px 20px;
  display:flex;flex-wrap:wrap;gap:8px;
  align-items:center;justify-content:center;
}
header nav a,
header nav .nav-btn{
  display:inline-flex;align-items:center;gap:5px;
  text-decoration:none;
  color:#fff;
  padding:8px 14px;
  border-radius:999px;
  font-size:14px;font-weight:600;
  background:linear-gradient(135deg,var(--primary),var(--primary-h));
  box-shadow:0 2px 12px rgba(79,70,229,.3);
  border:none;cursor:pointer;
  transition:transform .1s,box-shadow .2s,background .2s;
  white-space:nowrap;
}
header nav a:hover,header nav .nav-btn:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(79,70,229,.4);
  background:linear-gradient(135deg,var(--primary-h),var(--primary-d));
}
header nav a:active,header nav .nav-btn:active{transform:translateY(0)scale(.98)}
header nav .nav-logout{background:linear-gradient(135deg,#6b7280,#4b5563)}
header nav .nav-logout:hover{background:linear-gradient(135deg,#4b5563,#374151)}
header nav .nav-admin{background:linear-gradient(135deg,var(--warning),#d97706)}
header nav .nav-admin:hover{background:linear-gradient(135deg,#d97706,#b45309)}
header nav .nav-chat{background:linear-gradient(135deg,var(--success),#059669)}
header nav .nav-chat:hover{background:linear-gradient(135deg,#059669,#047857)}

/* 알림 뱃지 */
.nav-noti{position:relative}
.noti-badge{
  position:absolute;top:-4px;right:-6px;
  min-width:18px;height:18px;
  padding:0 4px;
  background:var(--danger);
  color:#fff;
  border-radius:999px;
  font-size:11px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  border:2px solid var(--card);
  animation:badgePop .3s ease;
}
@keyframes badgePop{0%{transform:scale(0)}70%{transform:scale(1.3)}100%{transform:scale(1)}}
header nav form{display:inline-flex}

/* ── Main Layout ────────────────────────── */
main{
  max-width:960px;
  margin:32px auto;
  padding:0 16px 60px;
}
.wide-main{max-width:1200px}

/* ── Typography ─────────────────────────── */
h1{font-size:clamp(22px,4vw,34px);text-align:center;color:var(--text);margin-bottom:20px;letter-spacing:-.3px}
h2{font-size:clamp(18px,3vw,24px);color:var(--text);margin:20px 0 12px}
h3{font-size:16px;color:var(--text);margin:14px 0 8px}
p{color:var(--text);margin-bottom:8px}

/* ── Cards ──────────────────────────────── */
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px 22px;
  box-shadow:var(--shadow);
  transition:transform .1s,box-shadow .2s,border-color .2s;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(79,70,229,.3)}

/* ── Post list ──────────────────────────── */
ul{list-style:none;padding:0;margin:0}
ul.post-list li,.post-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px 20px 14px;
  margin:12px 0;
  box-shadow:var(--shadow);
  transition:transform .1s,box-shadow .2s,border-color .2s;
}
ul.post-list li:hover,.post-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(79,70,229,.3);
}
.post-title{font-size:18px;font-weight:700;color:var(--text);text-decoration:none;display:block;margin-bottom:6px}
.post-title:hover{color:var(--primary)}
.post-meta{font-size:13px;color:var(--subtext);display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.post-meta a{color:var(--primary);font-size:13px}
.post-meta .views-badge,.post-meta .likes-badge{display:inline-flex;align-items:center;gap:3px}

/* ── Tags & Badges ──────────────────────── */
.badge{
  display:inline-block;padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:600;
}
.badge-primary{background:rgba(79,70,229,.12);color:var(--primary);border:1px solid rgba(79,70,229,.25)}
.badge-admin{background:rgba(245,158,11,.12);color:#92400e;border:1px solid rgba(245,158,11,.3)}
.badge-danger{background:rgba(239,68,68,.12);color:#991b1b;border:1px solid rgba(239,68,68,.25)}
.badge-success{background:rgba(16,185,129,.12);color:#065f46;border:1px solid rgba(16,185,129,.25)}
@media(prefers-color-scheme:dark){
  .badge-admin{color:#fcd34d}.badge-danger{color:#fca5a5}.badge-success{color:#6ee7b7}
}

/* ── Buttons ────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 18px;border-radius:10px;
  font-size:14px;font-weight:600;cursor:pointer;border:none;
  text-decoration:none;
  transition:transform .1s,box-shadow .2s,background .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)scale(.98)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-h));color:#fff;box-shadow:0 4px 14px rgba(79,70,229,.35)}
.btn-primary:hover{box-shadow:0 8px 24px rgba(79,70,229,.45)}
.btn-success{background:linear-gradient(135deg,var(--success),#059669);color:#fff;box-shadow:0 4px 14px rgba(16,185,129,.3)}
.btn-danger{background:linear-gradient(135deg,var(--danger),#dc2626);color:#fff;box-shadow:0 4px 14px rgba(239,68,68,.3)}
.btn-warning{background:linear-gradient(135deg,var(--warning),#d97706);color:#fff}
.btn-ghost{background:transparent;color:var(--primary);border:1.5px solid var(--primary);box-shadow:none}
.btn-ghost:hover{background:rgba(79,70,229,.08)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-xs{padding:4px 9px;font-size:12px;border-radius:6px}

/* ── Forms ──────────────────────────────── */
form .field{margin-bottom:16px}
form label,.label{display:block;font-size:14px;font-weight:600;color:var(--subtext);margin-bottom:6px}
input[type="text"],input[type="password"],input[type="email"],textarea,select{
  width:100%;
  padding:11px 14px;
  border:1.5px solid var(--border);
  border-radius:10px;
  background:var(--card);
  color:var(--text);
  font-size:15px;
  outline:none;
  transition:border-color .2s,box-shadow .2s;
  display:block;
}
textarea{min-height:120px;resize:vertical}
input:focus,textarea:focus,select:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px var(--ring);
}
input[type="file"]{
  width:100%;padding:10px;border:1.5px dashed var(--border);
  border-radius:10px;background:var(--card2);color:var(--subtext);cursor:pointer;
}
form button[type="submit"],.form-btn{
  padding:11px 22px;
  background:linear-gradient(135deg,var(--primary),var(--primary-h));
  color:#fff;font-size:15px;font-weight:700;
  border:none;border-radius:10px;cursor:pointer;
  box-shadow:0 4px 16px rgba(79,70,229,.35);
  transition:transform .1s,box-shadow .2s;
}
form button[type="submit"]:hover,.form-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(79,70,229,.45)}
form button[type="submit"]:active{transform:translateY(0)scale(.98)}

/* ── Search bar ─────────────────────────── */
.search-form{display:flex;gap:8px;margin:16px 0}
.search-form input{flex:1;min-width:0}
.search-form button{flex-shrink:0;padding:11px 18px;background:var(--primary);color:#fff;border:none;border-radius:10px;font-weight:600;cursor:pointer}
.search-form button:hover{background:var(--primary-h)}

/* ── Pagination ─────────────────────────── */
.pagination{display:flex;gap:6px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.pagination a,.pagination span{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:36px;height:36px;padding:0 10px;
  border-radius:8px;font-size:14px;font-weight:600;text-decoration:none;
  border:1.5px solid var(--border);
  transition:background .15s,border-color .15s;
}
.pagination a{color:var(--text);background:var(--card)}
.pagination a:hover{background:rgba(79,70,229,.1);border-color:var(--primary);color:var(--primary)}
.pagination span.current{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ── Comment section ────────────────────── */
.comment-section{margin-top:24px;padding-top:20px;border-top:2px solid var(--border)}
.comment-item{
  padding:14px 16px;margin:10px 0;
  background:var(--card2);border:1px solid var(--border);border-radius:10px;
}
.comment-item .comment-content{color:var(--text);margin-bottom:8px;white-space:pre-wrap}
.comment-meta{font-size:12px;color:var(--subtext);display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* ── Inline links ───────────────────────── */
a{color:var(--primary);text-decoration:none;transition:color .15s,opacity .15s}
a:hover{color:var(--primary-h);opacity:.9}

/* ── Board list grid ────────────────────── */
.board-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:14px;margin:20px 0;
}
.board-card{
  background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;text-decoration:none;color:var(--text);
  display:flex;flex-direction:column;gap:6px;
  box-shadow:var(--shadow);
  transition:transform .1s,box-shadow .2s,border-color .2s;
}
.board-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary);color:var(--text)}
.board-card .board-name{font-size:17px;font-weight:700;color:var(--primary)}
.board-card .board-info{font-size:12px;color:var(--subtext)}

/* ── Recent posts (homepage) ────────────── */
.recent-post{
  display:flex;flex-direction:column;gap:3px;
  padding:12px 16px;border-bottom:1px solid var(--border);
}
.recent-post:last-child{border-bottom:none}
.recent-post-title{font-size:15px;font-weight:600;color:var(--text);text-decoration:none}
.recent-post-title:hover{color:var(--primary)}
.recent-post-meta{font-size:12px;color:var(--subtext);display:flex;gap:8px}

/* ── Profile ────────────────────────────── */
.profile-header{
  display:flex;align-items:center;gap:16px;
  padding:24px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);margin-bottom:20px;
}
.avatar{
  width:64px;height:64px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  font-size:28px;color:#fff;font-weight:700;flex-shrink:0;
}
.profile-info{flex:1;min-width:0}
.profile-name{font-size:22px;font-weight:700;color:var(--text)}
.profile-username{font-size:14px;color:var(--subtext)}
.profile-stats{display:flex;gap:20px;margin-top:10px}
.profile-stat{text-align:center}
.profile-stat .num{font-size:18px;font-weight:700;color:var(--primary);display:block}
.profile-stat .lbl{font-size:12px;color:var(--subtext)}

/* ── Tabs ───────────────────────────────── */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:24px;gap:4px;overflow-x:auto}
.tab{
  padding:10px 18px;font-size:14px;font-weight:600;cursor:pointer;
  color:var(--subtext);text-decoration:none;border:none;background:none;
  border-bottom:2px solid transparent;margin-bottom:-2px;
  transition:color .15s,border-color .15s;white-space:nowrap;
}
.tab:hover{color:var(--primary)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}

/* ── Notification list ──────────────────── */
.noti-item{
  padding:14px 16px;margin:8px 0;
  background:var(--card);border:1px solid var(--border);border-radius:10px;
  display:flex;gap:12px;align-items:flex-start;
  transition:border-color .2s;
}
.noti-item.unread{border-left:3px solid var(--primary);background:rgba(79,70,229,.04)}
.noti-icon{font-size:20px;flex-shrink:0;margin-top:2px}
.noti-body{flex:1;min-width:0}
.noti-text{font-size:14px;color:var(--text)}
.noti-time{font-size:12px;color:var(--subtext);margin-top:3px}

/* ── DM / Chat ──────────────────────────── */
.chat-wrap{margin-top:20px}
.chat-log{
  height:55vh;min-height:360px;
  border:1.5px solid var(--border);border-radius:var(--radius);
  background:var(--card2);overflow-y:auto;
  padding:16px;display:flex;flex-direction:column;gap:10px;
}
.msg{display:flex;flex-direction:column;max-width:72%}
.msg.me{align-self:flex-end;align-items:flex-end}
.msg.peer{align-self:flex-start;align-items:flex-start}
.bubble{
  padding:10px 14px;border-radius:14px;font-size:14px;
  line-height:1.5;word-break:break-word;
  box-shadow:0 2px 8px rgba(0,0,0,.08);
}
.msg.me .bubble{
  background:linear-gradient(135deg,var(--primary),var(--primary-h));
  color:#fff;border-bottom-right-radius:4px;
}
.msg.peer .bubble{
  background:var(--card);border:1px solid var(--border);
  color:var(--text);border-bottom-left-radius:4px;
}
.msg .sender-name{font-size:11px;color:var(--subtext);margin-bottom:3px;font-weight:600}
.msg .msg-time{font-size:11px;color:var(--subtext);margin-top:3px}
.chat-input{display:flex;gap:8px;margin-top:12px;align-items:flex-end}
.chat-input textarea{height:52px;min-height:52px;max-height:120px;resize:none;margin-bottom:0;flex:1}
.chat-input .send-btn{
  padding:12px 18px;background:linear-gradient(135deg,var(--primary),var(--primary-h));
  color:#fff;border:none;border-radius:10px;font-weight:700;cursor:pointer;
  box-shadow:0 4px 12px rgba(79,70,229,.3);flex-shrink:0;
}
.chat-input .send-btn:hover{box-shadow:0 6px 20px rgba(79,70,229,.45)}

/* ── Group chat room list ───────────────── */
.gc-room-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:16px 0}
.gc-room-card{
  background:var(--card);border:1.5px solid var(--border);border-radius:12px;
  padding:16px;text-decoration:none;color:var(--text);
  display:flex;flex-direction:column;gap:6px;
  box-shadow:var(--shadow);
  transition:transform .1s,box-shadow .2s,border-color .2s;
}
.gc-room-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--success);color:var(--text)}
.gc-room-card .room-name{font-size:16px;font-weight:700;color:var(--success)}
.online-dot{width:8px;height:8px;border-radius:50%;background:var(--success);display:inline-block}

/* ── Admin panel ────────────────────────── */
.admin-stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;margin-bottom:28px}
.stat-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow);text-align:center;
}
.stat-card .stat-num{font-size:28px;font-weight:800;color:var(--primary);display:block}
.stat-card .stat-lbl{font-size:13px;color:var(--subtext);margin-top:4px}
.user-table{width:100%;border-collapse:collapse;font-size:14px}
.user-table th{background:var(--card2);padding:10px 14px;text-align:left;color:var(--subtext);font-weight:600;border-bottom:2px solid var(--border)}
.user-table td{padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
.user-table tr:hover td{background:rgba(79,70,229,.04)}
.action-group{display:flex;gap:6px;flex-wrap:wrap}

/* ── Toast notification ─────────────────── */
.toast-container{
  position:fixed;bottom:20px;right:20px;z-index:9999;
  display:flex;flex-direction:column;gap:10px;
  pointer-events:none;
}
.toast{
  background:var(--card);border:1px solid var(--border);
  border-radius:12px;padding:14px 18px;
  box-shadow:var(--shadow-lg);
  display:flex;gap:10px;align-items:flex-start;
  max-width:320px;min-width:260px;
  pointer-events:all;
  animation:slideIn .25s ease;
}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes slideOut{to{transform:translateX(110%);opacity:0}}
.toast.hiding{animation:slideOut .2s ease forwards}
.toast-icon{font-size:20px;flex-shrink:0}
.toast-body{flex:1;min-width:0}
.toast-title{font-size:14px;font-weight:700;color:var(--text)}
.toast-msg{font-size:13px;color:var(--subtext);word-break:break-word;margin-top:2px}
.toast-close{background:none;border:none;color:var(--subtext);cursor:pointer;font-size:18px;padding:0;line-height:1;flex-shrink:0}

/* ── Sections & dividers ────────────────── */
hr{border:none;border-top:1px solid var(--border);margin:20px 0}
.section-title{
  font-size:16px;font-weight:700;color:var(--subtext);
  text-transform:uppercase;letter-spacing:.5px;
  margin:24px 0 12px;padding-bottom:8px;
  border-bottom:2px solid var(--border);
  display:flex;align-items:center;gap:8px;
}

/* ── Like/Dislike buttons ───────────────── */
.reaction-bar{display:flex;gap:8px;margin:12px 0;flex-wrap:wrap;align-items:center}
.reaction-btn{
  display:inline-flex;align-items:center;gap:5px;
  padding:7px 14px;border-radius:999px;font-size:14px;font-weight:600;
  border:1.5px solid var(--border);background:var(--card);color:var(--subtext);
  cursor:pointer;transition:all .15s;text-decoration:none;
}
.reaction-btn:hover{border-color:var(--primary);color:var(--primary);background:rgba(79,70,229,.06)}
.reaction-btn.liked{border-color:var(--primary);color:var(--primary);background:rgba(79,70,229,.1)}
.reaction-btn.disliked{border-color:var(--danger);color:var(--danger);background:rgba(239,68,68,.08)}
.reaction-btn form{display:inline}

/* ── Alert / info boxes ─────────────────── */
.alert{padding:12px 16px;border-radius:10px;font-size:14px;margin:12px 0}
.alert-info{background:rgba(79,70,229,.08);color:var(--primary);border:1px solid rgba(79,70,229,.2)}
.alert-success{background:rgba(16,185,129,.08);color:var(--success);border:1px solid rgba(16,185,129,.2)}
.alert-danger{background:rgba(239,68,68,.08);color:var(--danger);border:1px solid rgba(239,68,68,.2)}
.alert-warning{background:rgba(245,158,11,.08);color:#92400e;border:1px solid rgba(245,158,11,.25)}
@media(prefers-color-scheme:dark){.alert-warning{color:#fcd34d}}

/* ── Online indicator ───────────────────── */
.online-count{
  display:inline-flex;align-items:center;gap:5px;
  font-size:13px;color:var(--subtext);
}
.online-count .dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

/* ── Error page ─────────────────────────── */
.error-box{text-align:center;padding:60px 20px}
.error-box h1{font-size:80px;color:var(--primary);margin-bottom:8px}
.error-box p{color:var(--subtext);font-size:18px}

/* ── Responsive ─────────────────────────── */
@media(max-width:640px){
  main{padding:0 12px 40px;margin-top:20px}
  header nav{padding:8px 12px;gap:6px}
  header nav a,header nav .nav-btn{padding:7px 11px;font-size:13px}
  h1{font-size:22px}
  .profile-header{flex-direction:column;text-align:center}
  .profile-stats{justify-content:center}
  .admin-stats{grid-template-columns:repeat(2,1fr)}
  .board-grid{grid-template-columns:1fr 1fr}
  .user-table{font-size:13px}
  .user-table th:nth-child(n+5),.user-table td:nth-child(n+5){display:none}
  .chat-log{height:45vh}
}

/* ── Utility ────────────────────────────── */
.text-center{text-align:center}
.text-muted{color:var(--subtext)}
.mt-4{margin-top:16px}.mt-8{margin-top:32px}
.mb-4{margin-bottom:16px}
.flex{display:flex}.flex-wrap{flex-wrap:wrap}
.gap-2{gap:8px}.gap-3{gap:12px}
.items-center{align-items:center}
.justify-between{justify-content:space-between}
.w-full{width:100%}
.hidden{display:none}