/* Inner-page design system. Same identity as the home page (deep green ledger + gold, Mitr / Plex Thai / Plex Mono). */
:root{--bg:#F4F2EA;--card:#FFF;--ink:#1F2D28;--sub:#5C6862;--line:#E3DFD2;--green:#0F6B4F;--deep:#0A3D2E;--deep2:#0E4F3B;--income:#0B7E56;--gold:#C9A227;--goldsoft:rgba(201,162,39,.14);--onDeep:#F3F1E8;--shadow:0 1px 2px rgba(10,61,46,.06),0 10px 30px -12px rgba(10,61,46,.18);--display:"Mitr","IBM Plex Sans Thai",sans-serif;--body:"IBM Plex Sans Thai","Sarabun",sans-serif;--mono:"IBM Plex Mono",ui-monospace,monospace}
@media(prefers-color-scheme:dark){:root{--bg:#0C1311;--card:#141D19;--ink:#E9EDE9;--sub:#98A49E;--line:#243029;--green:#34C08F;--income:#34C08F;--gold:#D8B54A;--goldsoft:rgba(216,181,74,.13);--shadow:0 1px 0 rgba(255,255,255,.03) inset,0 14px 34px -14px rgba(0,0,0,.6)}}
*{box-sizing:border-box}:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--green)}img{max-width:100%;height:auto}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.4;margin:0}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}

/* ---- header: sticky glass bar, nav scrolls sideways on phones instead of wrapping ---- */
.top{position:sticky;top:0;z-index:20;background:rgba(10,61,46,.86);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid rgba(243,241,232,.1)}
.top .wrap{max-width:1080px;display:flex;align-items:center;gap:14px;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--onDeep);text-decoration:none;font-family:var(--display);font-size:20px;flex:none}
.brand img{width:30px;height:30px;border-radius:8px}
.top nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 12px,#000 calc(100% - 12px),transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 12px,#000 calc(100% - 12px),transparent 100%)}
.top nav::-webkit-scrollbar{display:none}
.top nav a{color:rgba(243,241,232,.78);text-decoration:none;font-size:14.5px;padding:6px 12px;border-radius:999px;white-space:nowrap;transition:background .2s,color .2s}
.top nav a:hover{background:rgba(243,241,232,.1);color:#fff}
.top nav a[aria-current]{background:var(--gold);color:#1B1B12;font-weight:600}

/* ---- hero band: the ledger page from the home hero ---- */
.hero{position:relative;overflow:hidden;color:var(--onDeep);background:var(--deep);background-image:radial-gradient(900px 340px at 88% -10%,rgba(201,162,39,.22),transparent 60%),repeating-linear-gradient(to bottom,transparent 0 47px,rgba(243,241,232,.06) 47px 48px)}
.hero::before{content:"";position:absolute;top:0;bottom:0;left:max(20px,calc(50% - 430px + 20px));width:1px;background:rgba(201,162,39,.45)}
.hero .wrap{padding-top:54px;padding-bottom:50px;padding-left:34px;position:relative}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;color:var(--gold);text-transform:uppercase;margin:0 0 12px}
.hero h1{text-wrap:balance;font-size:clamp(30px,6.2vw,48px);color:#fff;letter-spacing:-.005em}
.hero .lead,.hero .lede{margin:14px 0 0;color:rgba(243,241,232,.8);font-size:clamp(16px,2.4vw,18.5px);max-width:620px}
.hero .meta{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:12.5px;padding:4px 12px;border-radius:999px;border:1px solid rgba(243,241,232,.25);color:rgba(243,241,232,.85)}
.chip.dot::before{content:"";width:7px;height:7px;border-radius:50%;background:#3DDC97;box-shadow:0 0 10px #3DDC97}

main{padding:34px 0 64px}
h2{font-size:clamp(21px,3.6vw,26px);margin:44px 0 12px;display:flex;align-items:center;gap:12px}
h2::before{content:"";width:5px;height:1.1em;border-radius:3px;background:linear-gradient(var(--gold),var(--green));flex:none}
h3{font-size:18px;margin:26px 0 6px}
p{margin:0 0 14px}
ul,ol{padding-left:22px}li{margin:7px 0}
.asof{font-family:var(--mono);font-size:12.5px;color:var(--sub);line-height:1.7}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:16px 0;box-shadow:var(--shadow)}
.card>:last-child{margin-bottom:0}
details.card summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.card summary::after{content:"+";font-family:var(--mono);color:var(--gold);font-size:22px;line-height:1}
details.card[open] summary::after{content:"–"}
details.card p{margin:10px 0 0;color:var(--sub)}

/* ---- Free vs Pro ---- */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:6px 0 8px}
.plan{border-radius:20px;padding:22px;border:1px solid var(--line);background:var(--card);box-shadow:var(--shadow)}
.plan.pro{background:linear-gradient(160deg,var(--deep2),var(--deep));color:var(--onDeep);border-color:rgba(201,162,39,.5);position:relative}
.plan.pro::after{content:"แนะนำเมื่อพอร์ตโต";position:absolute;top:-11px;right:16px;background:var(--gold);color:#1B1B12;font-size:12px;font-weight:600;padding:2px 12px;border-radius:999px}
.plan h3{margin:0 0 4px;font-size:22px}.plan .tag{font-family:var(--mono);font-size:12.5px;opacity:.7}
.plan ul{list-style:none;padding:0;margin:14px 0 0}.plan li{padding-left:24px;position:relative;margin:8px 0;font-size:15.5px}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--income);font-weight:700}.plan.pro li::before{color:var(--gold)}
.cmp{margin:18px 0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
.cmp .row{display:grid;grid-template-columns:1.5fr 1fr 1.25fr;border-bottom:1px solid var(--line)}
.cmp .row:last-child{border:0}.cmp .head{background:var(--deep);color:var(--onDeep);font-family:var(--display);font-size:15px}
.cmp .row>div{padding:12px 16px}.cmp .c.pro{background:var(--goldsoft)}.cmp .head .pro{background:var(--gold);color:#1B1B12}
.cmp .f{font-weight:500}
.yes{color:var(--income);font-weight:700}.no{color:var(--sub)}

/* ---- XD calendar cards ---- */
.xd{display:grid;gap:10px;margin:12px 0}
.xd .item{display:grid;grid-template-columns:62px 1fr auto;gap:14px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px 16px 12px 12px;box-shadow:var(--shadow)}
.xd .date{background:var(--deep);color:var(--onDeep);border-radius:12px;text-align:center;padding:7px 0 6px;line-height:1.1}
.xd .date b{display:block;font-family:var(--display);font-size:26px;color:var(--gold)}.xd .date span{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em}
.xd .past .date{background:var(--line);color:var(--sub)}.xd .past .date b{color:var(--sub)}
.xd .sym{font-family:var(--display);font-size:18px;line-height:1.3}.xd .nm{font-size:13px;color:var(--sub);line-height:1.4;margin-bottom:6px}
.xd .tags{display:flex;gap:6px;flex-wrap:wrap}.xd .tag{font-size:12.5px;padding:2px 10px;border-radius:999px;background:var(--goldsoft);color:var(--ink);border:1px solid rgba(201,162,39,.35)}
.xd .tag.pay{background:transparent;border-color:var(--line);color:var(--sub)}
.xd .amt{text-align:right;font-family:var(--mono);font-size:22px;color:var(--income);font-weight:600;line-height:1.1}.xd .amt small{display:block;font-size:11px;color:var(--sub);font-weight:400;margin-top:4px}
.hint{display:none}
.mlabel{font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;color:var(--sub);margin:22px 0 -2px;text-transform:uppercase}

/* ---- article typography ---- */
.prose{font-size:17.5px;line-height:1.95}
.prose h2{counter-increment:s}
.callout{background:var(--goldsoft);border:1px solid rgba(201,162,39,.4);border-radius:16px;padding:16px 20px;margin:20px 0}
.formula{font-family:var(--mono);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:12px 0;overflow-x:auto}
.example{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:14px 18px;margin:14px 0}
.example .num{font-family:var(--mono)}
.lede{color:var(--sub)}
.disc,.disclaimer{font-size:13px;color:var(--sub);border-top:1px solid var(--line);margin-top:38px;padding-top:14px;line-height:1.7}
.rel a{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:16px 18px;margin:10px 0;background:var(--card);border:1px solid var(--line);border-radius:16px;text-decoration:none;color:var(--ink);font-weight:500;box-shadow:var(--shadow);transition:transform .2s,border-color .2s}
.rel a::after{content:"→";color:var(--gold);font-family:var(--mono)}.rel a:hover{transform:translateY(-2px);border-color:var(--gold)}
input,select{font:inherit;padding:11px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);width:100%}
label{display:block;font-weight:500;margin:14px 0 5px}
.res{font-family:var(--mono);font-size:clamp(22px,5vw,30px);margin:8px 0}

/* ---- CTA: phone peeking out of a green panel ---- */
.cta{position:relative;overflow:hidden;margin:48px 0 0;border-radius:24px;padding:30px 28px;color:#fff;background:radial-gradient(500px 240px at 100% 0,rgba(201,162,39,.25),transparent 60%),linear-gradient(135deg,var(--deep2),var(--deep));display:grid;grid-template-columns:1fr 190px;gap:18px;align-items:end;box-shadow:0 24px 50px -22px rgba(10,61,46,.7)}
.cta h2{color:#fff;margin:0 0 8px;font-size:clamp(21px,3.6vw,26px)}.cta h2::before{display:none}
.cta p{margin:0 0 18px;color:rgba(255,255,255,.85)}
.cta .shot{width:190px;border-radius:22px 22px 0 0;margin:0 0 -34px;box-shadow:0 0 0 6px rgba(255,255,255,.1);display:block}
.btn{display:inline-block;margin:0 10px 10px 0;padding:13px 24px;border-radius:999px;background:var(--gold);color:#1B1B12;font-weight:600;text-decoration:none;box-shadow:0 8px 24px rgba(201,162,39,.28);transition:transform .2s}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff;box-shadow:none}
.pill{display:inline-block;font-family:var(--mono);font-size:12px;padding:2px 12px;border-radius:999px;border:1px solid var(--line);color:var(--sub);vertical-align:middle}
footer{background:var(--deep);color:rgba(243,241,232,.7);padding:30px 0;font-size:14px}
footer a{color:var(--onDeep);margin-right:18px;text-decoration:none;display:inline-block;margin-bottom:6px}footer a:hover{color:var(--gold)}
@media(prefers-reduced-motion:no-preference){.hero .wrap>*{animation:up .7s both}.hero .wrap>*:nth-child(2){animation-delay:.08s}.hero .wrap>*:nth-child(3){animation-delay:.16s}.hero .wrap>*:nth-child(4){animation-delay:.24s}@keyframes up{from{opacity:0;transform:translateY(14px)}}}
@media(max-width:640px){
 .plans{grid-template-columns:1fr}.hero .wrap{padding-top:40px;padding-bottom:36px}
 .cmp .head{display:none}.cmp .row{grid-template-columns:1fr 1fr}.cmp .f{grid-column:1/-1;padding-bottom:2px;font-weight:600}
 .cmp .f{padding:14px 16px 0}.cmp .c{padding:6px 16px 14px;font-size:15px}.cmp .c::before{content:attr(data-l);display:block;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--sub);text-transform:uppercase}
 .xd .item{grid-template-columns:56px 1fr;grid-template-areas:"d m" "d a"}.xd .date{grid-area:d;align-self:start}.xd .main{grid-area:m}.xd .amt{grid-area:a;text-align:left;display:flex;align-items:baseline;gap:8px}.xd .amt small{margin:0}
 .cta{grid-template-columns:1fr;padding-bottom:0}.cta .shot{margin:6px auto -2px;width:170px}
}