/* public/app.css — ต่อยอดจาก DESIGN.md ของ lungtiti.com (สมุดบัญชี: ครีม/หมึกน้ำเงิน/ตราประทับแดง) */
:root{--paper:#F4EFE3;--ink:#1E2A44;--stamp:#B23A26;--muted:#6B6354;--rule:#D8CDB6;--card:#FBF8F1;--ok:#3E6B4F}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--paper:#16181D;--ink:#ECE6D8;--stamp:#E06A52;--muted:#A89F8E;--rule:#3A3A3A;--card:#1E2026;--ok:#6FBF8B}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.75 Anuphan,sans-serif}
a{color:inherit;text-underline-offset:3px}
a:focus-visible,.btn:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--stamp);outline-offset:2px}
img,video{max-width:100%}
h1,h2,h3,h4{font-family:'Noto Serif Thai',serif;line-height:1.4;margin:0 0 8px}
h1{font-size:clamp(24px,5vw,34px);font-weight:800}
h2{font-size:21px;font-weight:700}
h3{font-size:18px;font-weight:700}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.wrap-narrow{max-width:720px;margin:0 auto;padding:0 16px}

/* ---- top bar ---- */
.top{border-bottom:1px solid var(--rule);background:var(--paper);position:sticky;top:0;z-index:10}
.bar{display:flex;align-items:center;gap:16px;min-height:58px;flex-wrap:wrap;padding:6px 0}
.logo{font:800 19px/1.3 'Noto Serif Thai',serif;text-decoration:none;white-space:nowrap}
.tabs{display:flex;gap:4px;flex-wrap:wrap;flex:1}
.tabs a{text-decoration:none;color:var(--muted);font-size:15px;font-weight:600;padding:8px 12px;border-radius:6px;transition:color .15s ease-out,background-color .15s ease-out}
.tabs a:hover{color:var(--ink)}
.tabs a.active{color:var(--stamp);background:var(--card);border:1px solid var(--rule)}
.user-box{margin-left:auto;position:relative}
.user-box>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px}
.user-box>summary::-webkit-details-marker{display:none}
.user-menu{position:absolute;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--rule);border-radius:8px;padding:10px;min-width:180px;box-shadow:0 6px 18px rgba(0,0,0,.12)}
.user-menu p{margin:0 0 8px;font-size:14px;color:var(--muted)}
.user-menu form{margin:0}
.user-menu .btn-outline{width:100%;text-align:center}

/* ---- avatar / badge ---- */
.avatar{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:var(--stamp);color:#fff;font:700 15px/1 'Noto Serif Thai',serif;flex-shrink:0}
.avatar.lg{width:56px;height:56px;font-size:22px}
.level-badge{display:inline-block;font:700 11px/1 Anuphan,sans-serif;color:var(--stamp);border:1px solid var(--stamp);border-radius:10px;padding:3px 8px;white-space:nowrap}
.who{display:flex;align-items:center;gap:10px}
.who .name{font-weight:600;font-size:15px}
.who .sub{color:var(--muted);font-size:13px;margin:0}

/* ---- buttons / forms ---- */
.btn{display:inline-block;background:var(--stamp);color:#fff;text-decoration:none;font-weight:600;padding:11px 18px;border:none;border-radius:6px;cursor:pointer;font-size:15px;transition:opacity .15s ease-out}
.btn:hover{opacity:.9}
@media (prefers-color-scheme:dark){.btn{color:#16181D}}
.btn[disabled],.btn.disabled{background:var(--rule);color:var(--muted);cursor:not-allowed;pointer-events:none}
.btn-outline{display:inline-block;background:transparent;color:var(--ink);text-decoration:none;font-weight:600;padding:10px 16px;border:1.5px solid var(--rule);border-radius:6px;cursor:pointer;font-size:14px;transition:border-color .15s ease-out}
.btn-outline:hover{border-color:var(--stamp)}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:5px}
.btn-like{background:transparent;border:1.5px solid var(--rule);border-radius:16px;padding:6px 12px;font-size:13px;color:var(--muted);cursor:pointer;font-weight:600;transition:border-color .15s ease-out,color .15s ease-out}
.btn-like.liked{border-color:var(--stamp);color:var(--stamp)}
input[type=text],input[type=email],textarea,select{width:100%;font:400 15px/1.6 Anuphan,sans-serif;padding:10px 12px;border:1px solid var(--rule);border-radius:6px;background:var(--card);color:var(--ink)}
textarea{resize:vertical;min-height:70px}
label{display:block;font-size:13px;color:var(--muted);margin:0 0 4px;font-weight:600}
.field{margin-bottom:14px}
.form-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.form-row .field{flex:1;min-width:160px;margin-bottom:0}

/* ---- card / stamp ---- */
.card{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:18px}
.stamp{display:inline-block;font:700 12px/1 Anuphan,sans-serif;color:var(--stamp);border:1.5px solid var(--stamp);border-radius:4px;padding:5px 7px;transform:rotate(-3deg)}
.pinned-tag{display:inline-flex;align-items:center;gap:6px;color:var(--stamp);font-weight:700;font-size:12px;margin-bottom:6px}
.pinned-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--stamp)}

/* ---- progress bar ---- */
.progress{height:8px;border-radius:4px;background:var(--rule);overflow:hidden;margin:10px 0}
.progress > i{display:block;height:100%;background:var(--stamp);border-radius:4px;transition:width .15s ease-out}
.progress-label{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}

/* ---- classroom: course grid ---- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:20px 0}
.course-card{display:block;text-decoration:none;color:inherit}
.course-card .card{height:100%}
.course-card h3{font-size:17px;margin:10px 0 4px}
.course-card p{margin:0;color:var(--muted);font-size:14px}
.course-card.locked .card{opacity:.65}
.course-card.locked{cursor:default}
.soon-badge{display:inline-block;margin-top:10px;font-size:12px;color:var(--muted);border:1px solid var(--rule);border-radius:10px;padding:4px 10px}

/* ---- lesson page ---- */
.lesson-layout{display:grid;grid-template-columns:250px 1fr;gap:24px;align-items:start;margin-top:20px}
.lesson-sidebar{border:1px solid var(--rule);border-radius:10px;background:var(--card);padding:10px;position:sticky;top:74px}
.lesson-sidebar h4{font-size:13px;color:var(--muted);text-transform:none;padding:6px 8px;margin:0}
.lesson-list{list-style:none;margin:0;padding:0}
.lesson-list li a{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);padding:8px;border-radius:6px;font-size:14px}
.lesson-list li a:hover{background:var(--paper)}
.lesson-list li a.current{background:var(--paper);font-weight:700;color:var(--stamp)}
.done-dot{width:16px;height:16px;border-radius:50%;border:2px solid var(--rule);flex-shrink:0;display:inline-block}
.done-dot.done{background:var(--stamp);border-color:var(--stamp)}
.lesson-main .kicker{color:var(--stamp);font-weight:600;font-size:13px;margin:0 0 6px}
.video-frame{width:100%;aspect-ratio:16/9;background:#000;border-radius:10px;overflow:hidden;margin:14px 0}
.video-frame video{width:100%;height:100%;display:block;background:#000}
.video-empty{width:100%;aspect-ratio:16/9;border:2px dashed var(--rule);border-radius:10px;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);background:var(--card);margin:14px 0;padding:20px}
.video-empty p{margin:0;font-size:16px;font-family:'Noto Serif Thai',serif;color:var(--ink)}
.core-idea{margin:18px 0}
.core-idea h4{font-size:14px;color:var(--muted);margin:0 0 6px;font-weight:700}
.exercise{background:var(--card);border:1px solid var(--rule);border-radius:8px;padding:14px 16px;margin:14px 0}
.lesson-actions{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}
.lesson-nav{display:flex;justify-content:space-between;gap:10px;margin-top:28px;border-top:1px solid var(--rule);padding-top:16px}
@media (max-width:760px){.lesson-layout{grid-template-columns:1fr}.lesson-sidebar{position:static}}

/* ---- community feed ---- */
.cat-pills{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.cat-pills a{text-decoration:none;font-size:13px;font-weight:600;color:var(--muted);border:1px solid var(--rule);border-radius:14px;padding:6px 12px}
.cat-pills a.active{color:#fff;background:var(--stamp);border-color:var(--stamp)}
.post{border:1px solid var(--rule);border-radius:10px;background:var(--card);padding:16px;margin-bottom:14px}
.post-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.post-meta{font-size:12px;color:var(--muted)}
.cat-tag{display:inline-block;font-size:11px;font-weight:700;color:var(--stamp);border:1px solid var(--stamp);border-radius:4px;padding:2px 6px;margin-left:6px;vertical-align:middle}
.post-body{white-space:pre-wrap;font-size:15px;line-height:1.7;margin:0 0 12px}
.post-foot{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.comment-list{margin-top:12px;border-top:1px solid var(--rule);padding-top:10px}
.comment{display:flex;gap:8px;margin-bottom:10px}
.comment .bubble{background:var(--paper);border-radius:8px;padding:8px 12px;flex:1}
.comment .name{font-weight:700;font-size:13px;margin-right:6px}
.comment .body{font-size:14px;white-space:pre-wrap}
.comment-form{display:flex;gap:8px;margin-top:8px}
.comment-form input{flex:1}
.new-post{margin-bottom:22px}

/* ---- leaderboard / members ---- */
.period-tabs{display:flex;gap:8px;margin:16px 0}
.period-tabs a{text-decoration:none;font-size:14px;font-weight:600;color:var(--muted);border:1px solid var(--rule);border-radius:8px;padding:8px 14px}
.period-tabs a.active{color:var(--stamp);border-color:var(--stamp)}
table{width:100%;border-collapse:collapse;margin:12px 0}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--rule);font-size:14px}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:none}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.rank{font-family:'Noto Serif Thai',serif;font-weight:700;color:var(--stamp);width:32px}
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;margin:16px 0}
.member-card{display:flex;align-items:center;gap:10px;border:1px solid var(--rule);border-radius:10px;padding:12px;background:var(--card)}

/* ---- admin ---- */
.admin-section{margin:28px 0;padding-top:20px;border-top:1px solid var(--rule)}
.admin-table td,.admin-table th{vertical-align:middle}
.table-scroll{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---- misc ---- */
.empty{color:var(--muted);padding:24px 0;text-align:center}
.note{color:var(--muted);font-size:14px}
.flash{background:var(--card);border:1px solid var(--stamp);border-radius:8px;padding:12px 14px;margin:14px 0;font-size:14px}
.foot{margin-top:60px;border-top:1px solid var(--rule);padding:20px 0;color:var(--muted);font-size:13px}
.center-page{min-height:70vh;display:flex;align-items:center;justify-content:center;padding:24px 0}
.login-card{max-width:380px;width:100%}
.login-card h1{font-size:24px;margin-bottom:6px}
@media (max-width:600px){.bar{gap:10px}.tabs{order:3;flex-basis:100%;justify-content:space-between}.tabs a{padding:8px 6px;font-size:13px}}
@media (max-width:480px){.form-row{flex-direction:column;align-items:stretch}.form-row .field{width:100%;min-width:0}.form-row>.btn,.form-row>button{width:100%}}
/* v2 25 ก.ย. 2569 — สิทธิ์รายคอร์ส · เครื่องเล่น · หน้าขาย · รีวิว · โปรไฟล์ */
.lesson-list li .locked-item{display:flex;align-items:center;gap:10px;color:var(--muted);padding:8px;font-size:14px;cursor:default;opacity:.75}
.free-tag{font-style:normal;font-size:12px;color:var(--stamp);font-weight:700;margin-left:4px;white-space:nowrap}
.sales-cta{border-color:var(--stamp)}
.resume-note{margin:-6px 0 12px;font-size:13px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:0 0 16px}
.stat-tile{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:14px 16px}
.stat-label{margin:0;font-size:13px;color:var(--muted)}
.stat-value{margin:4px 0 0;font-size:26px;font-weight:700;font-variant-numeric:tabular-nums}
.stat-sub{margin:4px 0 0;font-size:13px;color:var(--muted)}
.admin-table td.num{text-align:right;font-variant-numeric:tabular-nums}
.admin-table td.actions{display:flex;gap:6px;flex-wrap:wrap}
.admin-table td.actions form{margin:0}
.admin-details{margin-top:14px;border-top:1px solid var(--rule);padding-top:12px}
.admin-details summary{cursor:pointer;font-weight:600}
.admin-details textarea,.admin-details input[type=text]{width:100%}
.check{display:block;font-size:14px;margin:4px 0}
fieldset.field{border:1px solid var(--rule);border-radius:10px;padding:10px 14px}
.chip{display:inline-flex;align-items:center;gap:4px;background:var(--paper);border:1px solid var(--rule);border-radius:14px;padding:2px 4px 2px 10px;font-size:13px;margin:2px 4px 2px 0}
.chip button{border:none;background:none;color:var(--muted);cursor:pointer;font-size:15px;padding:0 6px}
.inline-form{display:inline-flex;gap:6px;align-items:center;margin-top:4px}
.flash-warn{border-color:var(--stamp)}
.stars{color:var(--stamp);letter-spacing:1px}
.avatar-img{object-fit:cover;padding:0}
.profile-photo{display:flex;gap:14px;align-items:center;margin-bottom:12px}
.star-opt{display:block;margin:4px 0;color:var(--stamp)}
.star-opt .note{color:var(--muted)}
/* หน้าขาย */
.sales-head{margin-bottom:18px}
.sales-head h1{margin:10px 0 6px}
.sales-tagline{font-size:18px;margin:0 0 6px}
.sales-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:24px;align-items:start}
@media (max-width:860px){.sales-grid{grid-template-columns:1fr}.sales-side{order:-1}}
.sales-block{background:var(--card);border:1px solid var(--rule);border-radius:10px;padding:18px 20px;margin-bottom:16px}
.sales-block h2{font-size:18px;margin:14px 0 6px}
.sales-block h2:first-child{margin-top:0}
.sales-list{margin:0 0 12px;padding-left:20px}
.lesson-rows{list-style:none;margin:0;padding:0}
.lesson-row{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--rule);font-size:15px}
.lesson-row:last-child{border-bottom:none}
.lesson-row a{color:var(--ink)}
.lesson-row.locked{color:var(--muted)}
.lesson-row-meta{white-space:nowrap;font-size:13px;color:var(--muted)}
.lesson-row-meta a{color:var(--stamp);font-weight:700}
.buy-box{background:var(--card);border:1.5px solid var(--stamp);border-radius:10px;padding:18px 20px;position:sticky;top:12px}
.buy-price{font-size:24px;font-weight:700;margin:0 0 4px;font-variant-numeric:tabular-nums}
.btn-block{display:block;width:100%;text-align:center;margin-top:10px}
.form-error{color:var(--stamp);font-size:14px;margin:6px 0 0}
.test-banner{background:var(--paper);border:1px dashed var(--stamp);border-radius:6px;padding:6px 10px;font-size:13px;margin:0 0 10px}
#payment-element{margin:10px 0}
.review-grid{display:grid;gap:12px}
.review-card{margin:0;border-top:1px solid var(--rule);padding-top:12px}
.review-card blockquote{margin:6px 0 8px;font-size:15px;line-height:1.7}
.review-card .who{display:flex;align-items:center;gap:8px;font-size:14px}
.thanks-card{max-width:480px;width:100%;text-align:center}