/* ── Self-hosted Inter font ───────────────────────────────── */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: block;
  src: url('/fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: block;
  src: url('/fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: block;
  src: url('/fonts/inter-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: block;
  src: url('/fonts/inter-700.woff2') format('woff2');
}

/* ── Reset & base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scrollbar-gutter: stable; }

:root {
  --bg:        #FFFFFF;
  --primary:   #4F46E5;
  --secondary: #3B82F6;
  --text:      #111827;
  --muted:     #6B7280;
  --border:    #E5E7EB;
  --radius:    8px;
  --shadow:    0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow-btn:0 1px 2px rgba(79,70,229,.30);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Layout helpers ───────────────────────────────────────── */
.container { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.hidden    { display: none !important; }

/* ── Header ───────────────────────────────────────────────── */
.header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  background: var(--bg);
}
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.header-brand { display: flex; align-items: baseline; gap: 12px; }
.logo     { font-size: 20px; font-weight: 700; color: var(--primary); letter-spacing: -0.5px; }
.tagline  { font-size: 13px; color: var(--muted); }

/* ── Auth bar ─────────────────────────────────────────────── */
.auth-bar { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.auth-status { font-size: 13px; color: var(--muted); white-space: nowrap; }
.btn-auth {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s, color .15s;
  white-space: nowrap;
}
.btn-auth:hover { border-color: var(--primary); color: var(--primary); }

/* ── Main area ────────────────────────────────────────────── */
.main { flex: 1; padding: 40px 24px 60px; }

/* ── Credits bar ──────────────────────────────────────────── */
.credits-bar {
  background: #EEF2FF;
  border: 1px solid #C7D2FE;
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  min-height: 42px;
}

/* ── Card ─────────────────────────────────────────────────── */
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px 40px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.card-title    { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.card-subtitle { color: var(--muted); font-size: 14px; margin-bottom: 28px; }

/* ── Input toggle ─────────────────────────────────────────── */
.toggle-row {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.toggle-btn {
  flex: 1;
  padding: 9px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
}
.toggle-btn.active {
  border-color: var(--primary);
  background: #EEF2FF;
  color: var(--primary);
}
.toggle-btn:not(.active):hover { background: #F9FAFB; color: var(--text); }

/* ── Paste section header ─────────────────────────────────── */
.paste-header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 6px;
}
.btn-clear {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 12px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn-clear:hover { border-color: #9CA3AF; color: var(--text); }
.btn-clear.ready { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-clear.ready:hover { background: var(--secondary); border-color: var(--secondary); color: #fff; }

/* ── Textarea ─────────────────────────────────────────────── */
.textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--text);
  resize: vertical;
  outline: none;
  transition: border-color .15s;
}
.textarea:focus { border-color: var(--primary); }

/* ── File upload ──────────────────────────────────────────── */
.file-label {
  display: block;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  font-size: 14px;
  color: var(--muted);
  transition: border-color .15s, background .15s;
}
.file-label:hover  { border-color: var(--primary); background: #F9FAFB; }
.file-label input  { display: none; }
.file-label.has-file  { border-color: var(--primary); color: var(--text); background: #EEF2FF; }
.file-label.drag-over { border-color: var(--primary); background: #EEF2FF; }
.file-hint { font-size: 12px; color: var(--muted); margin-top: 6px; }
.file-hint.error   { color: #DC2626; }

/* ── Format selector ──────────────────────────────────────── */
.format-row {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 24px 0;
}
.format-label   { font-size: 14px; font-weight: 500; color: var(--text); white-space: nowrap; }
.format-options { display: flex; gap: 20px; }
.radio-label    { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }
.radio-label input { accent-color: var(--primary); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 11px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity .15s, transform .1s;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
  width: 100%;
  margin-top: 4px;
  position: relative;
  overflow: hidden;
}
.btn-primary:not(:disabled):hover { opacity: .90; }
.btn-primary .btn-label { position: relative; z-index: 2; }

/* ── Ping-pong loading fill ───────────────────────────────── */
.btn-fill {
  position: absolute;
  inset: 0;
  width: 0%;
  background: rgba(255,255,255,.22);
  z-index: 1;
  pointer-events: none;
}
.btn-primary.is-loading {
  cursor: not-allowed;
  opacity: 1;
}
.btn-primary.is-loading .btn-fill {
  animation: btn-ping-pong 1.8s ease-in-out infinite;
}
@keyframes btn-ping-pong {
  0%   { left: 0;    width: 0%;   }
  45%  { left: 0;    width: 100%; }
  50%  { left: 0;    width: 100%; }
  95%  { left: 100%; width: 0%;   }
  100% { left: 0;    width: 0%;   }
}

/* ── Status message ───────────────────────────────────────── */
.status-msg {
  margin-top: 12px;
  font-size: 14px;
  min-height: 20px;
  color: var(--muted);
}
.status-msg.error   { color: #DC2626; }
.status-msg.success { color: #16A34A; }
.status-msg.warning { color: #D97706; }

/* ── Form fields (sign-in, etc.) ──────────────────────────── */
.field-group  { margin-bottom: 16px; }
.field-label  { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
.input:focus { border-color: var(--primary); }

/* ── Title + counter row ──────────────────────────────────── */
.title-counter-row { display: flex; align-items: center; gap: 12px; margin-top: 6px; margin-bottom: 16px; }
.doc-title-input   { flex: 1; min-width: 0; }

/* ── Char counter ─────────────────────────────────────────── */
.char-counter      { font-size: 12px; color: var(--muted); white-space: nowrap; }
.char-counter.warn { color: #D97706; }
.char-counter.over { color: #DC2626; font-weight: 500; }

/* ── Upgrade grid (0-credit prompt for logged-in users) ───── */
.upgrade-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 8px; }
.upgrade-option {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.upgrade-name { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 12px; }
.upgrade-price { font-size: 32px; font-weight: 700; color: var(--primary); line-height: 1; }
.upgrade-period { font-size: 14px; font-weight: 400; color: var(--muted); }
.upgrade-credits { font-size: 13px; color: var(--muted); margin: 8px 0 20px; }

/* ── Plans section ────────────────────────────────────────── */
.plans-section { margin-bottom: 40px; }
.plans-title { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.plans-intro  { font-size: 14px; color: var(--muted); margin-bottom: 20px; line-height: 1.6; }
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.plan-card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 20px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.plan-card--featured { border-color: var(--primary); }
.plan-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.plan-name { font-size: 14px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 12px; }
.plan-price { font-size: 36px; font-weight: 700; color: var(--text); line-height: 1; }
.plan-period { font-size: 15px; font-weight: 400; color: var(--muted); }
.plan-desc { font-size: 13px; color: var(--muted); margin: 6px 0 16px; }
.plan-features {
  list-style: none;
  text-align: left;
  margin: 0 0 24px;
  padding: 0;
  font-size: 13px;
  color: var(--text);
  flex: 1;
}
.plan-features li { padding: 4px 0 4px 18px; position: relative; }
.plan-features li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.btn-outline {
  display: block;
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ── Info sections ────────────────────────────────────────── */
.info-sections {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.info-section h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.info-section p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 600px;
}

.info-section p + p { margin-top: 10px; }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.footer p { margin: 3px 0; }
.footer-credit::before { content: ' | '; }
.footer-link { color: var(--muted); text-decoration: none; }
.footer-link:hover { color: var(--primary); }

/* ── Current plan button ──────────────────────────────────── */
.btn-current { opacity: 0.45; cursor: not-allowed; }

/* ── Feedback floating button ─────────────────────────────── */
.btn-feedback-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 24px;
  padding: 10px 20px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(79,70,229,.35);
  z-index: 900;
  transition: opacity .15s, transform .1s;
}
.btn-feedback-float:hover { opacity: .9; transform: translateY(-1px); }

/* ── Feedback modal ────────────────────────────────────────── */
.feedback-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feedback-modal {
  background: var(--bg);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  margin: 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
  position: relative;
}
.feedback-modal__close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
  padding: 2px 6px;
}
.feedback-modal__close:hover { color: var(--text); }
.feedback-modal__title { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.feedback-modal__sub   { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
.feedback-modal__textarea { min-height: 100px; resize: vertical; }

/* ── Beta badge ───────────────────────────────────────────── */
/* Corner triangle — clips the rotated ribbon to a triangle shape */
.beta-corner {
  position: fixed;
  top: 0;
  left: 0;
  width: 72px;
  height: 72px;
  overflow: hidden;
  z-index: 9999;
  cursor: pointer;
}
/* Ribbon strip — must be wider than the container diagonal (72×√2≈102px) */
.beta-corner__ribbon {
  position: absolute;
  top: 22px;
  left: -26px;
  width: 124px;
  background: var(--primary);
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-align: center;
  padding: 5px 0;
  transform: rotate(-45deg);
  transform-origin: center center;
  user-select: none;
  transition: background .15s;
}
.beta-corner:hover .beta-corner__ribbon { background: #4338CA; }

/* Popover panel */
.beta-popover {
  position: fixed;
  top: 8px;
  left: 80px;
  width: 280px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12), 0 2px 6px rgba(0,0,0,.08);
  padding: 20px;
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px) scale(.97);
  transform-origin: top left;
  transition: opacity .18s ease, transform .18s ease;
}
.beta-popover.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}
.beta-popover__title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.beta-popover__body  { font-size: 13px; color: var(--muted); line-height: 1.55; margin-bottom: 16px; }
.beta-popover__btn {
  display: block;
  width: 100%;
  padding: 10px 0;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  transition: opacity .15s;
}
.beta-popover__btn:hover { opacity: .88; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
  .plans-grid    { grid-template-columns: 1fr; }
  .upgrade-grid  { grid-template-columns: 1fr; }
  .auth-status   { display: none; }
  .tagline       { display: none; }
  /* Attribution wraps to its own third line on mobile */
  .footer-credit { display: block; }
  .footer-credit::before { content: ''; }
  /* Push header logo right of the fixed beta badge (72 px wide) */
  .header .container { padding-left: 80px; }
  /* Prevent mobile browsers from auto-zooming focused fields (triggers at < 16px) */
  .textarea {
    font-size: 16px;
    max-height: 24vh;
    resize: none;
  }
  .input { font-size: 16px; }
}
@media (max-width: 520px) {
  .card        { padding: 28px 20px; }
  .format-row  { flex-direction: column; align-items: flex-start; gap: 10px; }
}
@media (max-width: 400px) {
  /* Popover drops below the corner on very small screens */
  .beta-popover {
    top: 76px;
    left: 8px;
    right: 8px;
    width: auto;
    transform-origin: top center;
  }
}