/* =========================================================
   AcademixStore — Author Application Landing Page
   Design tokens: "Ink & Paper" — an editorial, manuscript
   theme distinct from the eco-app site, built for the
   author/teacher audience.
   ========================================================= */

:root{
  /* color */
  --ink-900: #14261F;      /* deep forest ink — primary text */
  --ink-700: #1F6E4E;      /* leaf green — primary action */
  --ink-700-dark: #175539;
  --paper: #EFE7D2;        /* aged paper — page background */
  --paper-light: #FAF6EA;  /* card surfaces */
  --paper-line: rgba(20,38,31,0.14);
  --brass: #A6752B;        /* wax seal / prestige accent */
  --brass-light: #C99A4B;
  --ink-muted: #4B5A50;    /* secondary text */

  /* type */
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Work Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* layout */
  --wrap: 1140px;
  --radius: 10px;
  --shadow-soft: 0 8px 30px rgba(20,38,31,0.08);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink-900);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

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

a{ color: var(--ink-700); }

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 .5em;
  color: var(--ink-900);
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 12px;
}
.eyebrow.center{ text-align:center; }
.eyebrow::before{ content:"— "; }

.section-title{
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
  max-width: 640px;
}
.section-title.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-lead{
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 520px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor:pointer;
  transition: transform .15s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn:focus-visible{
  outline: 3px solid var(--brass-light);
  outline-offset: 2px;
}
.btn-primary{
  background: var(--ink-700);
  color: #fff;
}
.btn-primary:hover{ background: var(--ink-700-dark); transform: translateY(-1px); }
.btn-ghost{
  background: transparent;
  color: var(--ink-900);
  border-color: var(--ink-900);
}
.btn-ghost:hover{ background: rgba(20,38,31,0.06); }
.btn-small{ padding: 9px 20px; font-size: 0.88rem; }
.btn-large{ padding: 16px 34px; font-size: 1.05rem; }

/* ---------- header ---------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: rgba(239,231,210,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--paper-line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding-top:16px;
  padding-bottom:16px;
}
.brand{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink-900);
  text-decoration:none;
}
.brand span{ color: var(--ink-700); }
.main-nav{
  display:flex;
  gap: 32px;
}
.main-nav a{
  color: var(--ink-900);
  text-decoration:none;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.main-nav a:hover{ border-color: var(--ink-700); color: var(--ink-700); }

@media (max-width: 780px){
  .main-nav{ display:none; }
}

/* ---------- hero ---------- */
.hero{ padding: 72px 0 40px; }
.hero-inner{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items:center;
}
.hero-copy h1{
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  max-width: 620px;
}
.ink-underline{
  position:relative;
  display:inline-block;
  color: var(--ink-700-dark);
}
.ink-underline::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom: -2px;
  height: 10px;
  background: var(--brass-light);
  opacity: .55;
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  animation: draw-underline 1s cubic-bezier(.5,0,.2,1) .5s forwards;
  z-index:-1;
}
@keyframes draw-underline{ to{ transform: scaleX(1); } }

.hero-sub{
  font-size: 1.08rem;
  color: var(--ink-muted);
  max-width: 520px;
  margin-bottom: 28px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom: 40px; }
.hero-stats{
  display:flex;
  gap: 36px;
}
.hero-stats div{ display:flex; flex-direction:column; }
.hero-stats strong{
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--ink-700-dark);
}
.hero-stats span{
  font-size: 0.82rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

/* hero art / manuscript svg */
.hero-art{ display:flex; justify-content:center; }
.manuscript-svg{ width: 100%; max-width: 420px; }
.book-base{ fill: var(--ink-700); opacity: .9; }
.book-2{ fill: var(--ink-700-dark); }
.page-left, .page-right{ fill: var(--paper-light); stroke: var(--ink-900); stroke-width: 1.5; }
.page-line{ fill:none; stroke: var(--ink-muted); stroke-width: 2; stroke-linecap: round; opacity:.55; }
.wax-seal{ opacity:0; transform-origin: 315px 255px; animation: stamp-in .5s ease .9s forwards; }
.seal-circle{ fill: var(--brass); stroke: var(--brass-light); stroke-width: 3; }
.seal-mark{ font-family: var(--font-display); font-weight:700; font-size: 30px; fill: var(--paper-light); }
@keyframes stamp-in{
  0%{ opacity:0; transform: scale(2.2) translateY(-40px); }
  70%{ opacity:1; }
  100%{ opacity:1; transform: scale(1) translateY(0); }
}
.pen-group{
  stroke: var(--ink-900);
  stroke-linecap: round;
  opacity: 0;
  animation: pen-fade .4s ease .3s forwards;
}
@keyframes pen-fade{ to{ opacity:1; } }
.pen-body{ stroke-width: 5; }
.pen-nib{ fill: var(--brass); stroke: var(--ink-900); stroke-width:1.5; stroke-linejoin: round; }

/* ---------- sections ---------- */
.section{ padding: 88px 0; }
.section-alt{ background: var(--paper-light); border-top: 1px solid var(--paper-line); border-bottom: 1px solid var(--paper-line); }

/* feature cards */
.card-grid{
  margin-top: 48px;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card{
  background: var(--paper-light);
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.feature-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow-soft); }
.feature-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 40px; height:40px;
  border-radius: 50%;
  background: var(--paper);
  color: var(--brass);
  font-family: var(--font-display);
  font-weight:700;
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.feature-card h3{ font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p{ color: var(--ink-muted); font-size: 0.95rem; margin:0; }

@media (max-width: 980px){
  .card-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px){
  .card-grid{ grid-template-columns: 1fr; }
}

/* steps */
.steps{
  list-style:none;
  margin: 56px 0 0;
  padding:0;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  counter-reset: step;
}
.step{
  position:relative;
  padding: 0 20px 0 0;
  border-left: 1px solid var(--paper-line);
  padding-left: 22px;
}
.step:first-child{ border-left: none; padding-left:0; }
.step-mark{
  display:block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--brass);
  margin-bottom: 10px;
}
.step h3{ font-size: 1.1rem; margin-bottom: 8px; }
.step p{ color: var(--ink-muted); font-size: 0.93rem; margin:0; }

@media (max-width: 860px){
  .steps{ grid-template-columns: 1fr; gap: 28px; }
  .step{ border-left: none; padding-left:0; border-top: 1px solid var(--paper-line); padding-top:22px; }
  .step:first-child{ border-top:none; padding-top:0; }
}

/* eligibility */
.eligibility-inner{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items:start;
}
.checklist{
  list-style:none;
  margin:0; padding:0;
  display:flex;
  flex-direction:column;
  gap: 16px;
}
.checklist li{
  position:relative;
  padding-left: 30px;
  color: var(--ink-900);
}
.checklist li::before{
  content:"✓";
  position:absolute;
  left:0; top:0;
  color: var(--ink-700);
  font-weight:700;
  font-family: var(--font-mono);
}
@media (max-width: 860px){
  .eligibility-inner{ grid-template-columns: 1fr; gap: 32px; }
}

/* ---------- form ---------- */
.section-form{ background: var(--paper-light); border-top: 1px solid var(--paper-line); }
.form-wrap{ max-width: 760px; }
.form-intro{ margin-bottom: 40px; }
.form-intro .section-title{ max-width:none; }

.form-fieldset{
  border: none;
  padding: 0;
  margin: 0 0 36px;
}
.form-fieldset legend{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-700-dark);
  padding: 0 0 14px;
  border-bottom: 1px solid var(--paper-line);
  width: 100%;
  margin-bottom: 22px;
}

.form-row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-field{ display:flex; flex-direction:column; }
.form-field-full{ grid-column: 1 / -1; }

label{
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 7px;
  color: var(--ink-900);
}
.req{ color: var(--brass); }
.optional{ color: var(--ink-muted); font-weight:400; font-size: 0.82rem; }

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
select,
textarea{
  font-family: var(--font-body);
  font-size: 0.98rem;
  padding: 12px 14px;
  border: 1.5px solid var(--paper-line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink-900);
  width: 100%;
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus{
  outline:none;
  border-color: var(--ink-700);
  box-shadow: 0 0 0 3px rgba(31,110,78,0.15);
}
textarea{ resize: vertical; min-height: 100px; }

.field-error{
  display:block;
  min-height: 18px;
  font-size: 0.82rem;
  color: #B4423A;
  margin-top: 5px;
  font-family: var(--font-mono);
}
.field-hint{
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-top: 5px;
  font-family: var(--font-mono);
  align-self: flex-end;
}

.form-field.field-invalid input,
.form-field.field-invalid select,
.form-field.field-invalid textarea{
  border-color: #B4423A;
  box-shadow: 0 0 0 3px rgba(180,66,58,0.12);
}

.checkbox-field{
  flex-direction: row;
  align-items:flex-start;
  gap: 10px;
  margin-bottom: 30px;
}
.checkbox-field input{ margin-top: 3px; width:18px; height:18px; accent-color: var(--ink-700); flex-shrink:0; }
.checkbox-field label{ font-weight:400; font-size: 0.92rem; margin:0; }

.form-submit-row{ display:flex; align-items:center; gap:20px; flex-wrap:wrap; }
.form-note{ color: var(--ink-muted); font-size: 0.85rem; margin:0; }

.btn.is-loading .btn-label::after{
  content:"";
  display:inline-block;
  width: 14px; height:14px;
  margin-left: 8px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color:#fff;
  border-radius:50%;
  vertical-align: -2px;
  animation: spin .7s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

@media (max-width: 700px){
  .form-row{ grid-template-columns: 1fr; }
}

/* success panel */
.success-panel{
  text-align:center;
  padding: 60px 20px;
  animation: fade-up .5s ease;
}
@keyframes fade-up{ from{ opacity:0; transform: translateY(14px);} to{ opacity:1; transform:translateY(0);} }
.seal-stamp{ width:90px; margin: 0 auto 24px; }
.seal-stamp svg circle{ fill: var(--brass); stroke: var(--brass-light); stroke-width:4; }
.seal-stamp svg text{ font-family: var(--font-display); font-weight:700; font-size: 46px; fill: var(--paper-light); }
.success-panel h3{ font-size: 1.5rem; }
.success-panel p{ color: var(--ink-muted); max-width: 460px; margin: 0 auto 28px; }

/* ---------- FAQ ---------- */
.faq-list{
  max-width: 720px;
  margin: 44px auto 0;
  display:flex;
  flex-direction:column;
  gap: 12px;
}
.faq-item{
  background: var(--paper-light);
  border: 1px solid var(--paper-line);
  border-radius: 8px;
  padding: 6px 22px;
}
.faq-item summary{
  cursor:pointer;
  padding: 16px 0;
  font-weight: 600;
  font-family: var(--font-display);
  font-size: 1.02rem;
  list-style: none;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+";
  font-family: var(--font-mono);
  color: var(--brass);
  font-size: 1.3rem;
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item p{ margin: 0 0 18px; color: var(--ink-muted); }

/* ---------- footer ---------- */
.site-footer{ padding: 48px 0 20px; }
.footer-inner{
  display:flex;
  justify-content: space-between;
  align-items:flex-start;
  flex-wrap:wrap;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--paper-line);
}
.brand-footer{ display:inline-block; margin-bottom: 8px; }
.footer-inner p{ color: var(--ink-muted); font-size: 0.9rem; max-width: 320px; margin:0; }
.footer-links{ display:flex; flex-direction:column; gap:10px; }
.footer-links a{ color: var(--ink-900); text-decoration:none; font-size: 0.92rem; }
.footer-links a:hover{ color: var(--ink-700); }
.footer-copy{
  text-align:center;
  color: var(--ink-muted);
  font-size: 0.82rem;
  margin-top: 20px;
}