/* ==========================================================================
   สมุดเงิน — Design tokens
   Concept: the Thai bank passbook (สมุดบัญชีธนาคาร) — a printed ledger
   everyone recognizes — reimagined as a web app for daily รายรับ-รายจ่าย
   ========================================================================== */

:root{
  --bg:            #F2F7F5;   /* page background — pale mint-white */
  --paper:         #FBF7EC;   /* passbook paper cream (used only inside ledger surfaces) */
  --ink:           #12241F;   /* deep pine — primary text */
  --ink-soft:      #4B6259;   /* muted body text */
  --primary:       #1F7A5C;   /* teal green — brand / income */
  --primary-dark:  #14523D;
  --gold:          #C9973E;   /* coin gold — accent */
  --expense:       #D9564F;   /* soft coral red — expense / negative */
  --line:          rgba(18,36,31,0.14);
  --line-soft:     rgba(18,36,31,0.08);
  --shadow:        0 20px 50px -25px rgba(18,36,31,0.35);

  --font-display:  'Prompt', 'Noto Sans Thai', sans-serif;
  --font-body:     'Sarabun', 'Noto Sans Thai', sans-serif;
  --font-mono:     'IBM Plex Mono', ui-monospace, monospace;

  --radius-lg: 28px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }

a{ color: inherit; text-decoration: none; }

button{ font-family: inherit; cursor: pointer; }

:focus-visible{
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.container{
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}

/* ---------------- Top bar ---------------- */

.topbar{
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(242,247,245,0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.topbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: 1160px;
  margin: 0 auto;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--primary-dark);
}

.brand-mark{
  width: 34px; height: 34px;
  border-radius: 8px;
  background: var(--primary);
  display: grid;
  place-items: center;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,0.15);
}
.brand-mark svg{ width: 18px; height: 18px; }

.nav-links{
  display: flex;
  gap: 32px;
  font-size: 15px;
  color: var(--ink-soft);
}
.nav-links a:hover{ color: var(--primary-dark); }

.topbar-actions{
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }

.btn-primary{
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 20px -10px rgba(31,122,92,0.7);
}
.btn-primary:hover{ background: var(--primary-dark); }

.btn-ghost{
  background: transparent;
  color: var(--primary-dark);
  border-color: var(--line);
}
.btn-ghost:hover{ border-color: var(--primary); background: rgba(31,122,92,0.06); }

.btn-login{
  background: var(--ink);
  color: #fff;
}
.btn-login:hover{ background: var(--primary-dark); }

.btn-block{ width: 100%; }

/* ---------------- Hero ---------------- */

.hero{
  padding: 76px 0 60px;
}

.hero-inner{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--primary-dark);
  background: rgba(31,122,92,0.1);
  border: 1px solid rgba(31,122,92,0.25);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background: var(--gold); }

.hero h1{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 44px;
  line-height: 1.25;
  margin: 0 0 20px;
  color: var(--ink);
}
.hero h1 span{ color: var(--primary); }

.hero p.lead{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 480px;
  margin: 0 0 32px;
}

.hero-ctas{ display: flex; gap: 14px; margin-bottom: 34px; flex-wrap: wrap; }

.hero-stats{
  display: flex;
  gap: 32px;
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
}
.hero-stats div strong{
  display:block;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--primary-dark);
}
.hero-stats div span{ font-size: 13px; color: var(--ink-soft); }

/* ---------------- Passbook signature illustration ---------------- */

.passbook-wrap{
  position: relative;
  perspective: 1200px;
}

.passbook{
  background: var(--paper);
  border-radius: 6px 14px 14px 6px;
  box-shadow: var(--shadow), inset -1px 0 0 rgba(0,0,0,0.05);
  padding: 30px 30px 26px;
  position: relative;
  transform: rotate(-2deg);
  animation: float 6s ease-in-out infinite;
  border: 1px solid rgba(18,36,31,0.08);
}

.passbook::before{
  /* spiral binding edge */
  content: "";
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 14px;
  background-image: radial-gradient(circle at 50% 50%, var(--bg) 2.5px, transparent 2.6px);
  background-size: 14px 16px;
  background-repeat: repeat-y;
  border-right: 1px dashed var(--line);
}

@keyframes float{
  0%, 100%{ transform: rotate(-2deg) translateY(0); }
  50%{ transform: rotate(-2deg) translateY(-10px); }
}

.passbook-header{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
  padding-left: 14px;
}
.passbook-header .bank{
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--primary-dark);
  font-size: 15px;
}
.passbook-header .acct{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
}
.stamp{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 50%;
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  text-align: center;
  transform: rotate(8deg);
  opacity: .8;
  line-height: 1.1;
}

.ledger{
  padding-left: 14px;
  border-top: 1px dashed var(--line);
}

.ledger-row{
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  opacity: 0;
  transform: translateX(-6px);
  animation: rowIn .5s ease forwards;
}
.ledger-row:nth-child(1){ animation-delay: .3s; }
.ledger-row:nth-child(2){ animation-delay: .6s; }
.ledger-row:nth-child(3){ animation-delay: .9s; }
.ledger-row:nth-child(4){ animation-delay: 1.2s; }

@keyframes rowIn{ to{ opacity: 1; transform: translateX(0); } }

.ledger-row .date{ color: var(--ink-soft); }
.ledger-row .desc{ font-family: var(--font-body); color: var(--ink); font-size: 14px; }
.ledger-row .amt.in{ color: var(--primary); }
.ledger-row .amt.out{ color: var(--expense); }

.ledger-balance{
  padding: 18px 0 4px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ledger-balance .label{ font-size: 13px; color: var(--ink-soft); }
.ledger-balance .value{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 26px;
  color: var(--primary-dark);
}

.passbook-shadow-card{
  position: absolute;
  inset: 18px -18px -18px 18px;
  background: rgba(31,122,92,0.08);
  border-radius: 6px 14px 14px 6px;
  z-index: -1;
}

/* ---------------- Section framing ---------------- */

.section{ padding: 80px 0; }
.section-alt{ background: #fff; border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }

.section-head{
  max-width: 620px;
  margin: 0 0 44px;
}
.section-head .eyebrow{ margin-bottom: 14px; }
.section-head h2{
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  margin: 0 0 12px;
}
.section-head p{ color: var(--ink-soft); font-size: 16px; margin:0; }

/* ---------------- Feature groups ---------------- */

.group{ margin-bottom: 56px; }
.group:last-child{ margin-bottom: 0; }

.group-title{
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}
.group-title h3{
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-dark);
  margin: 0;
}
.group-title .rule{
  flex: 1;
  height: 1px;
  background: var(--line);
}

.card-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card{
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feature-card:hover{
  transform: translateY(-4px);
  box-shadow: 0 18px 30px -20px rgba(18,36,31,0.3);
  border-color: rgba(31,122,92,0.3);
}
.feature-icon{
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(31,122,92,0.1);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  color: var(--primary-dark);
}
.feature-icon svg{ width: 20px; height: 20px; }
.feature-card h4{
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 6px;
}
.feature-card p{
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------------- CTA band ---------------- */

.cta-band{
  background: var(--primary-dark);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 52px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-band h2{
  font-family: var(--font-display);
  font-size: 26px;
  margin: 0 0 8px;
}
.cta-band p{ color: rgba(255,255,255,0.75); margin:0; max-width: 420px; }
.cta-band .btn-primary{ background:#fff; color: var(--primary-dark); }
.cta-band .btn-primary:hover{ background: var(--gold); color: #fff; }

/* ---------------- Footer ---------------- */

footer{
  padding: 40px 0;
  border-top: 1px solid var(--line-soft);
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------------- Login page ---------------- */

.auth-page{
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.auth-side{
  background: var(--primary-dark);
  color: #fff;
  padding: 56px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}
.auth-side::after{
  content: "";
  position: absolute;
  right: -80px; bottom: -80px;
  width: 260px; height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}
.auth-side .brand{ color: #fff; }
.auth-side .brand-mark{ background: rgba(255,255,255,0.15); }

.auth-quote{
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.5;
  max-width: 380px;
}
.auth-quote span{ color: var(--gold); }

.auth-mini-ledger{
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  max-width: 340px;
}
.auth-mini-ledger .row{
  display:flex; justify-content:space-between;
  padding: 6px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.15);
}
.auth-mini-ledger .row:last-child{ border-bottom: none; }
.auth-mini-ledger .in{ color: #8fd6b8; }
.auth-mini-ledger .out{ color: #f2a6a2; }

.auth-main{
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 32px;
}

.auth-card{
  width: 100%;
  max-width: 400px;
}

.auth-back{
  font-size: 14px;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 28px;
}
.auth-back:hover{ color: var(--primary-dark); }

.auth-tabs{
  display: flex;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  margin-bottom: 30px;
}
.auth-tab{
  flex: 1;
  text-align: center;
  padding: 10px 0;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink-soft);
  transition: background .15s ease, color .15s ease;
  border: none;
  background: transparent;
}
.auth-tab.active{
  background: var(--primary);
  color: #fff;
}

.auth-card h1{
  font-family: var(--font-display);
  font-size: 26px;
  margin: 0 0 6px;
}
.auth-card > p{
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0 0 28px;
}

.field{ margin-bottom: 18px; }
.field label{
  display:block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 7px;
}
.field-input{
  position: relative;
}
.field-input input{
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #fff;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field-input input:focus{
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(31,122,92,0.12);
  outline: none;
}
.field-input input.error{
  border-color: var(--expense);
}
.field-hint{
  font-size: 12.5px;
  color: var(--expense);
  margin-top: 6px;
  min-height: 1em;
}

.toggle-pw{
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 600;
}
.toggle-pw:hover{ color: var(--primary-dark); }

.field-row{
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13.5px;
  margin-bottom: 22px;
}
.remember{ display:flex; align-items:center; gap:8px; color: var(--ink-soft); }
.remember input{ accent-color: var(--primary); }
.forgot:hover{ color: var(--primary-dark); text-decoration: underline; }

.auth-divider{
  display:flex;
  align-items:center;
  gap:12px;
  color: var(--ink-soft);
  font-size: 13px;
  margin: 24px 0;
}
.auth-divider::before, .auth-divider::after{
  content:"";
  flex:1;
  height:1px;
  background: var(--line);
}

.auth-switch{
  text-align:center;
  font-size: 14px;
  color: var(--ink-soft);
  margin-top: 20px;
}
.auth-switch button{
  background:none; border:none;
  color: var(--primary-dark);
  font-weight: 700;
  padding: 0;
}
.auth-switch button:hover{ text-decoration: underline; }

.form-panel{ display:none; }
.form-panel.active{ display:block; }

/* ---------------- Responsive ---------------- */

@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .passbook-wrap{ order: -1; max-width: 420px; margin: 0 auto; }
  .card-grid{ grid-template-columns: repeat(2, 1fr); }
  .auth-page{ grid-template-columns: 1fr; }
  .auth-side{ display: none; }
}

@media (max-width: 640px){
  .container{ padding: 0 20px; }
  .topbar-inner{ padding: 14px 20px; }
  .nav-links{ display: none; }
  .hero{ padding: 44px 0 40px; }
  .hero h1{ font-size: 32px; }
  .hero-ctas{ flex-direction: column; }
  .hero-ctas .btn{ width: 100%; }
  .hero-stats{ gap: 20px; flex-wrap: wrap; }
  .card-grid{ grid-template-columns: 1fr; }
  .cta-band{ flex-direction: column; text-align: center; padding: 36px 24px; }
  .section{ padding: 56px 0; }
}