:root{
  --font-body:'Inter',sans-serif;
  --font-display:'Outfit',sans-serif;

  --paper:#FAF7F0;
  --paper-alt:#F1ECE0;
  --ink:#232323;
  --ink-soft:#5B564C;
  --navy:#1F2A44;
  --navy-soft:#3A4A6B;
  --seal:#A5432C;
  --seal-soft:#C25B3F;
  --line:#E1D9C6;
  --success:#2E7D4F;
  --danger:#B3261E;

  --bg:var(--paper);
  --bg-alt:var(--paper-alt);
  --text:var(--ink);
  --text-soft:var(--ink-soft);
  --accent:var(--seal);
  --accent-soft:var(--seal-soft);
  --border:var(--line);
  --card-bg:#ffffff;
  --header-bg:rgba(250,247,240,0.92);
  --shadow:0 10px 30px -12px rgba(31,42,68,0.18);
}

[data-theme="dark"]{
  --bg:#181510;
  --bg-alt:#211D17;
  --text:#F1ECE0;
  --text-soft:#C9C2B2;
  --accent:#E07A57;
  --accent-soft:#F0946F;
  --border:#3A342A;
  --card-bg:#221E17;
  --header-bg:rgba(24,21,16,0.92);
  --navy:#E1D9C6;
  --shadow:0 10px 30px -12px rgba(0,0,0,0.5);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  transition:background .25s ease,color .25s ease;
}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);margin:0 0 .5em;line-height:1.15;}
p{margin:0 0 1em;color:var(--text-soft);}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}
:focus-visible{outline:3px solid var(--accent-soft);outline-offset:2px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:8px;border:2px solid transparent;
  font-family:var(--font-body);font-weight:600;font-size:.95rem;cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
  text-decoration:none;
}
.btn:hover{transform:translateY(-1px);text-decoration:none;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-soft);}
.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none;}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--border);}
[data-theme="dark"] .btn-outline{color:var(--text);}
.btn-ghost{background:transparent;color:var(--text-soft);border-color:transparent;}
.btn-lg{padding:14px 28px;font-size:1rem;}
.btn-spinner{display:none;width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;}
.btn.is-loading .btn-spinner{display:inline-block;}
.btn.is-loading .btn-text{opacity:.8;}
@keyframes spin{to{transform:rotate(360deg);}}

/* Cookie banner */
.cookie-banner{
  position:fixed;bottom:16px;left:16px;right:16px;max-width:520px;margin:0 auto;
  background:var(--card-bg);border:1px solid var(--border);border-radius:12px;
  padding:18px;box-shadow:var(--shadow);z-index:200;display:none;gap:10px;flex-direction:column;
}
.cookie-banner.show{display:flex;}
.cookie-banner p{margin:0;font-size:.9rem;}
.cookie-actions{display:flex;gap:10px;justify-content:flex-end;}

/* Header */
.site-header{
  position:sticky;top:0;z-index:100;background:var(--header-bg);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px;}
.logo{font-family:var(--font-display);font-weight:700;font-size:1.25rem;color:var(--text);}
.logo span{color:var(--accent);}
.main-nav ul{list-style:none;display:flex;gap:26px;margin:0;padding:0;align-items:center;}
.main-nav a,.nav-link{color:var(--text);font-weight:500;font-size:.95rem;background:none;border:none;cursor:pointer;font-family:var(--font-body);padding:0;}
.has-mega{position:relative;}
.mega-menu{
  position:absolute;top:100%;left:50%;transform:translateX(-50%);
  background:var(--card-bg);border:1px solid var(--border);border-radius:10px;
  box-shadow:var(--shadow);display:none;grid-template-columns:repeat(2,220px);
  gap:4px 20px;padding:18px;min-width:460px;z-index:50;
}
.has-mega.open .mega-menu{display:grid;}
.mega-menu a{padding:6px 0;font-size:.88rem;color:var(--text-soft);white-space:normal;}
.header-actions{display:flex;align-items:center;gap:12px;}
.theme-toggle{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--border);background:var(--card-bg);
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text);
}
.icon-moon{display:none;}
[data-theme="dark"] .icon-sun{display:none;}
[data-theme="dark"] .icon-moon{display:block;}
.nav-toggle{display:none;flex-direction:column;gap:4px;width:32px;height:32px;background:none;border:none;cursor:pointer;padding:6px;}
.nav-toggle span{display:block;height:2px;background:var(--text);border-radius:2px;}

/* Breadcrumb */
.breadcrumb{padding:14px 0;font-size:.85rem;color:var(--text-soft);border-bottom:1px solid var(--border);}
.breadcrumb a{color:var(--text-soft);}
.breadcrumb span[aria-hidden]{margin:0 8px;}
.breadcrumb [aria-current]{color:var(--text);font-weight:600;}

/* Hero */
.hero{padding:64px 0 40px;background:linear-gradient(180deg,var(--bg-alt),var(--bg));}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.eyebrow{color:var(--accent);font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:.8rem;}
.hero h1{font-size:clamp(2.1rem,4vw,3.2rem);}
.hero-sub{font-size:1.05rem;max-width:520px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px;}

.envelope{position:relative;width:100%;max-width:380px;aspect-ratio:4/3;margin:0 auto;}
.letter-sheet{
  position:absolute;inset:8% 10% 6%;background:var(--card-bg);border:1px solid var(--border);
  border-radius:6px;box-shadow:var(--shadow);padding:22px;transform:translateY(0);
  animation:slideUp 1.1s ease both;
}
.envelope-flap{
  position:absolute;top:0;left:0;right:0;height:52%;
  background:linear-gradient(135deg,var(--navy),var(--navy-soft));
  clip-path:polygon(0 0,100% 0,50% 62%);border-radius:6px 6px 0 0;
}
.letter-sheet .line{display:block;height:8px;border-radius:4px;background:var(--border);margin-bottom:12px;}
.letter-sheet .l1{width:80%;} .letter-sheet .l2{width:95%;} .letter-sheet .l3{width:70%;} .letter-sheet .l4.short{width:45%;}
.seal{
  position:absolute;top:-14px;right:-14px;width:44px;height:44px;border-radius:50%;background:var(--accent);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:var(--shadow);
}
@keyframes slideUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:translateY(0);}}
@media (prefers-reduced-motion:reduce){.letter-sheet{animation:none;}}

/* Tools strip */
.tools-strip{padding:20px 0;border-bottom:1px solid var(--border);}
.strip-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-soft);margin-bottom:10px;}
.strip-scroll{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin;}
.strip-scroll a{
  flex:0 0 auto;white-space:nowrap;background:var(--bg-alt);border:1px solid var(--border);
  padding:8px 14px;border-radius:20px;font-size:.85rem;color:var(--text);
}
.strip-scroll a:hover{background:var(--accent);color:#fff;border-color:var(--accent);text-decoration:none;}

/* Generator */
.generator{padding:64px 0;}
.section-sub{max-width:600px;}
.letter-form{margin-top:24px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field-full{grid-column:1 / -1;}
label{font-weight:600;font-size:.9rem;}
.req{color:var(--accent);}
input[type="text"],input[type="date"],select,textarea,input[type="file"]{
  font-family:var(--font-body);font-size:.95rem;padding:11px 13px;border-radius:8px;
  border:1px solid var(--border);background:var(--card-bg);color:var(--text);width:100%;
}
input:focus,select:focus,textarea:focus{border-color:var(--accent);}
textarea{resize:vertical;}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--danger);}
.error-msg{font-size:.8rem;color:var(--danger);min-height:1em;}
.hint{font-size:.8rem;color:var(--text-soft);}
.char-count{font-size:.78rem;color:var(--text-soft);text-align:right;}
.form-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap;}

/* Results */
.results{padding:0 0 64px;}
.result-box{
  background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:24px;
  min-height:140px;box-shadow:var(--shadow);
}
.result-box pre{
  margin:0;white-space:pre-wrap;word-wrap:break-word;font-family:var(--font-body);
  font-size:.95rem;color:var(--text);
}
.result-box pre:empty::before{content:"Your generated letter will appear here.";color:var(--text-soft);}
.result-actions{display:flex;align-items:center;gap:14px;margin-top:16px;flex-wrap:wrap;}
.copy-toast{font-size:.85rem;color:var(--success);}

/* Features */
.features{padding:64px 0;background:var(--bg-alt);}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px;}
.feature-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:24px;}
.feature-card h3{font-size:1.1rem;}
.feature-card p{margin:0;font-size:.92rem;}

/* How it works */
.how-it-works{padding:64px 0;}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:24px;}
.step{position:relative;padding:24px 20px 20px;border:1px solid var(--border);border-radius:12px;background:var(--card-bg);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;
  background:var(--accent);color:#fff;font-weight:700;font-family:var(--font-display);margin-bottom:12px;
}
.step h3{font-size:1rem;}
.step p{font-size:.9rem;margin:0;}

/* SEO content */
.seo-content{padding:64px 0;background:var(--bg-alt);}
.seo-content .container{max-width:880px;}
.seo-content p{font-size:1rem;}

/* FAQ */
.faq{padding:64px 0;}
.faq-list{max-width:820px;margin-top:20px;}
details{border:1px solid var(--border);border-radius:10px;padding:16px 18px;margin-bottom:12px;background:var(--card-bg);}
summary{font-weight:600;cursor:pointer;list-style:none;}
summary::-webkit-details-marker{display:none;}
summary::after{content:'+';float:right;color:var(--accent);font-weight:700;}
details[open] summary::after{content:'\2212';}
details p{margin:12px 0 0;font-size:.92rem;}

/* CTA */
.cta{padding:64px 0;background:linear-gradient(135deg,var(--navy),var(--navy-soft));}
.cta-inner{text-align:center;}
.cta h2{color:#fff;}
.cta p{color:#D8DEEB;max-width:560px;margin:0 auto 20px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.cta .btn-outline{color:#fff;border-color:rgba(255,255,255,.5);}
.cta .btn-outline:hover{background:rgba(255,255,255,.1);}

/* Footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.footer-col h4{font-size:.95rem;margin-bottom:14px;}
.footer-col a{display:block;color:var(--text-soft);font-size:.88rem;padding:4px 0;}
.footer-brand p{font-size:.85rem;}
.disclaimer{font-size:.76rem;color:var(--text-soft);opacity:.8;}
.footer-bottom{border-top:1px solid var(--border);margin-top:32px;padding:18px 0;text-align:center;}
.footer-bottom p{margin:0;font-size:.82rem;}

/* Responsive */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-visual{order:-1;max-width:320px;margin:0 auto;}
  .form-grid{grid-template-columns:1fr;}
  .features-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:720px){
  .main-nav{position:fixed;top:68px;left:0;right:0;bottom:0;background:var(--bg);padding:20px;
    transform:translateX(100%);transition:transform .25s ease;overflow-y:auto;}
  .main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:flex-start;gap:4px;}
  .main-nav li{width:100%;}
  .mega-menu{position:static;transform:none;grid-template-columns:1fr;min-width:0;box-shadow:none;border:none;padding:6px 0 6px 12px;}
  .has-mega.open .mega-menu{display:flex;flex-direction:column;}
  .nav-toggle{display:flex;}
  .features-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:480px){
  .container{padding:0 16px;}
  .hero{padding:40px 0 28px;}
  .form-actions{flex-direction:column;}
  .form-actions .btn{width:100%;}
}