/* ================================================================
   Deductify — styles.css
   Single stylesheet for all pages. Mobile-first. WCAG AA.
   ================================================================ */

:root {
  --primary:      #6B6FD4;
  --primary-dark: #5558B8;
  --primary-100:  #EEEEFF;
  --text-1:       #18181B;
  --text-2:       #52525B;
  --text-3:       #A1A1AA;
  --border:       #E4E4F0;
  --surface:      #FAFAFF;
  --white:        #FFFFFF;
  --r-sm:         8px;
  --r:            14px;
  --r-lg:         20px;
  --shadow:       0 2px 16px rgba(107,111,212,.08);
  --shadow-md:    0 6px 28px rgba(107,111,212,.15);
  --trans:        .17s ease;
  --max-w:        1080px;
}

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, picture { display: block; max-width: 100%; }
input, textarea, button, select { font: inherit; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-1);
  background: var(--white);
  line-height: 1.65;
  font-size: 1rem;
}

/* --- Typography --- */
h1 { font-size: clamp(2.25rem, 6vw, 3.75rem); line-height: 1.1; font-weight: 800; letter-spacing: -.03em; }
h2 { font-size: clamp(1.625rem, 3.5vw, 2.375rem); line-height: 1.2; font-weight: 700; letter-spacing: -.02em; }
h3 { font-size: 1.25rem; line-height: 1.3; font-weight: 600; }
p  { color: var(--text-2); line-height: 1.7; }
strong { color: var(--text-1); }

/* --- Layout --- */
.container    { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.container-sm { max-width: 720px;        margin: 0 auto; padding: 0 1.5rem; }
section { padding: 5rem 0; }

/* --- Skip nav (a11y) --- */
.skip-nav {
  position: absolute; top: -100%; left: 1rem;
  background: var(--primary); color: var(--white);
  padding: .5rem 1rem; font-weight: 600;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  z-index: 1000; transition: top .2s;
}
.skip-nav:focus { top: 0; }

/* --- Navigation --- */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-size: 1.25rem; font-weight: 800; letter-spacing: -.03em;
  color: var(--primary);
}
.nav-logo:hover { opacity: .8; }
.nav-links { display: flex; gap: 1.75rem; }
.nav-links a {
  font-size: .9375rem; font-weight: 500; color: var(--text-2);
  transition: color var(--trans);
}
.nav-links a:hover { color: var(--primary); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.5rem; border-radius: var(--r-sm);
  font-size: .9375rem; font-weight: 600;
  transition: all var(--trans); cursor: pointer; border: none;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary-100); }

.btn-appstore {
  display: inline-flex; align-items: center; gap: .625rem;
  background: #000; color: #fff;
  padding: .625rem 1.125rem; border-radius: 10px;
  transition: opacity var(--trans), transform var(--trans);
}
.btn-appstore:hover { opacity: .82; transform: translateY(-1px); }
.btn-appstore-text { display: flex; flex-direction: column; }
.btn-appstore-sub  { font-size: .5625rem; font-weight: 400; letter-spacing: .04em; opacity: .85; text-transform: uppercase; }
.btn-appstore-main { font-size: 1rem; font-weight: 600; letter-spacing: -.01em; line-height: 1.2; }

/* --- Section label --- */
.section-label {
  display: inline-block; font-size: .75rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 1rem;
}

/* --- Hero --- */
.hero { padding: 6rem 0 5rem; text-align: center; }
.hero .container { max-width: 640px; }
.hero-mark {
  width: 88px; height: 88px; border-radius: 50%;
  background: var(--primary-100); border: 3px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 2rem; overflow: hidden;
}
.hero-mark img { width: 88px; height: 88px; object-fit: cover; }
.hero-mark-letter {
  font-size: 2.5rem; font-weight: 800; color: var(--primary); line-height: 1;
}
.hero h1 { margin-bottom: 1.25rem; }
.hero-tagline {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-2); max-width: 460px; margin: 0 auto 2.5rem;
}
.hero-ctas { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* --- Portfolio --- */
.portfolio { background: var(--surface); }
.portfolio-header { text-align: center; margin-bottom: 3rem; }
.portfolio-header p { margin-top: .75rem; font-size: 1.0625rem; }

.portfolio-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 640px) { .portfolio-grid { grid-template-columns: 1fr 1fr; } }

.app-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 2rem;
  display: flex; flex-direction: column; gap: 1rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--trans), transform var(--trans);
}
.app-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.app-icon {
  width: 72px; height: 72px; border-radius: 16px;
  object-fit: cover; background: var(--surface); border: 1px solid var(--border);
}
.app-card h3 { font-size: 1.375rem; }
.app-card-desc { font-size: .9375rem; }
.app-card-actions {
  display: flex; flex-wrap: wrap; gap: .75rem;
  align-items: center; margin-top: .5rem;
}
.app-site-link {
  font-size: .875rem; font-weight: 600; color: var(--primary);
  display: flex; align-items: center; gap: .25rem;
}
.app-site-link:hover { text-decoration: underline; }

/* --- About excerpt --- */
.about-excerpt { text-align: center; }
.about-excerpt .container { max-width: 640px; }
.about-excerpt h2 { margin-bottom: 1.25rem; }
.about-excerpt p { font-size: 1.0625rem; margin-bottom: 1.5rem; }

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 1rem 0; font-size: .8125rem; color: var(--text-3);
  border-bottom: 1px solid var(--border);
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 .375rem; }

/* --- Inner page hero --- */
.page-hero { padding: 3.5rem 0 2.5rem; border-bottom: 1px solid var(--border); }
.page-hero h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: .625rem; }
.page-hero p { font-size: 1.0625rem; }
.page-body { padding: 3.5rem 0; }
.page-body p { font-size: 1.0625rem; margin-bottom: 1.5rem; }
.page-body h2 { margin: 2.5rem 0 1rem; font-size: 1.5rem; }
.page-body h3 { margin: 2rem 0 .75rem; }

/* --- Product page --- */
.product-hero-inner {
  display: flex; align-items: flex-start; gap: 2rem; flex-wrap: wrap;
}
.product-icon-large {
  width: 110px; height: 110px; border-radius: 24px;
  object-fit: cover; background: var(--surface); border: 1px solid var(--border); flex-shrink: 0;
}
.product-hero-text h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: .5rem; }
.product-hero-text .tagline { font-size: 1.125rem; color: var(--text-2); }
.product-cta-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 2rem; text-align: center; margin: 2.5rem 0;
}
.product-cta-box p { margin-bottom: 1.25rem; font-size: 1.0625rem; }
.product-cta-actions { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }

.product-screenshots {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem;
}
@media (min-width: 600px) { .product-screenshots { grid-template-columns: repeat(3, 1fr); } }
.product-screenshots img {
  border-radius: var(--r-sm); border: 1px solid var(--border);
  background: var(--surface); aspect-ratio: 9/19.5; object-fit: cover; width: 100%;
}

/* --- About page --- */
.founder-block {
  display: flex; gap: 2.5rem; flex-wrap: wrap;
  align-items: flex-start; padding: 3.5rem 0;
}
.founder-photo {
  width: 140px; height: 140px; border-radius: 50%;
  object-fit: cover; background: var(--surface); border: 3px solid var(--border); flex-shrink: 0;
}
.founder-photo-placeholder {
  width: 140px; height: 140px; border-radius: 50%;
  background: var(--primary-100); border: 3px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.founder-photo-placeholder span { font-size: 3rem; font-weight: 800; color: var(--primary); }
.founder-text p { font-size: 1.0625rem; margin-bottom: 1rem; }
.studio-details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.5rem; margin-top: 1.5rem;
}
.studio-details dl { display: grid; grid-template-columns: auto 1fr; gap: .5rem 1.5rem; }
.studio-details dt { font-size: .875rem; font-weight: 600; color: var(--text-1); }
.studio-details dd { font-size: .875rem; color: var(--text-2); }

.values-section { background: var(--surface); }
.values-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.25rem; margin-top: 2.5rem;
}
@media (min-width: 640px) { .values-grid { grid-template-columns: 1fr 1fr 1fr; } }
.value-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.5rem;
}
.value-card h3 { color: var(--primary); margin-bottom: .5rem; }
.value-card p { font-size: .9375rem; }

/* --- Contact page --- */
.contact-layout {
  display: grid; grid-template-columns: 1fr; gap: 3.5rem; padding: 3.5rem 0;
}
@media (min-width: 640px) { .contact-layout { grid-template-columns: 1fr 1fr; } }
.contact-info p { font-size: 1.0625rem; margin-bottom: .75rem; }
.contact-info a { color: var(--primary); }
.contact-info a:hover { text-decoration: underline; }
.contact-email-link {
  display: inline-flex; align-items: center;
  font-size: 1.0625rem; font-weight: 600; color: var(--primary);
  padding: .75rem 1.25rem; background: var(--primary-100);
  border-radius: var(--r-sm); margin: 1rem 0;
}
.contact-social { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.social-btn {
  display: inline-flex; align-items: center; gap: .375rem;
  font-size: .875rem; font-weight: 600; color: var(--text-2);
  padding: .5rem .875rem;
  border: 1.5px solid var(--border); border-radius: var(--r-sm);
  transition: border-color var(--trans), color var(--trans), background var(--trans);
}
.social-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-100); }

.form-group { display: flex; flex-direction: column; gap: .375rem; margin-bottom: 1.25rem; }
.form-group label { font-size: .875rem; font-weight: 600; color: var(--text-1); }
input[type=text], input[type=email], textarea {
  padding: .75rem 1rem;
  border: 1.5px solid var(--border); border-radius: var(--r-sm);
  background: var(--white); color: var(--text-1); font-size: 1rem; width: 100%;
  transition: border-color var(--trans), box-shadow var(--trans);
}
input[type=text]:focus, input[type=email]:focus, textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(107,111,212,.12);
}
input::placeholder, textarea::placeholder { color: var(--text-3); }
textarea { resize: vertical; min-height: 140px; }
.btn-submit {
  background: var(--primary); color: var(--white);
  padding: .75rem 2rem; border-radius: var(--r-sm);
  font-size: .9375rem; font-weight: 600; border: none; cursor: pointer;
  transition: background var(--trans), transform var(--trans);
}
.btn-submit:hover { background: var(--primary-dark); transform: translateY(-1px); }
.form-note { font-size: .8125rem; color: var(--text-3); margin-top: .5rem; }

/* --- Legal pages --- */
.legal-body { padding: 3rem 0; }
.legal-body .container-sm h2 { font-size: 1.25rem; margin: 2.25rem 0 .75rem; color: var(--text-1); }
.legal-body .container-sm p { margin-bottom: 1rem; font-size: .9375rem; }
.legal-body .container-sm ul { padding-left: 1.5rem; margin-bottom: 1rem; }
.legal-body .container-sm li { font-size: .9375rem; color: var(--text-2); margin-bottom: .5rem; }
.legal-body .container-sm a { color: var(--primary); }
.legal-body .container-sm a:hover { text-decoration: underline; }
.legal-updated { font-size: .875rem; color: var(--text-3); margin-bottom: 2rem; }

/* --- Footer --- */
.site-footer {
  background: var(--surface); border-top: 1px solid var(--border); padding: 3rem 0;
}
.footer-inner {
  display: grid; grid-template-columns: 1fr; gap: 2rem;
}
@media (min-width: 640px) { .footer-inner { grid-template-columns: auto 1fr auto; } }
.footer-brand p { font-size: .8125rem; color: var(--text-3); margin-top: .375rem; }
.footer-nav-group { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-content: flex-start; }
.footer-nav-group a { font-size: .875rem; color: var(--text-2); transition: color var(--trans); }
.footer-nav-group a:hover { color: var(--primary); }
.footer-contact { font-size: .8125rem; }
.footer-contact a { color: var(--primary); }
.footer-contact a:hover { text-decoration: underline; }
.footer-contact p + p { margin-top: .5rem; }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 1.5rem; margin-top: 2rem;
  font-size: .8125rem; color: var(--text-3);
  display: flex; flex-wrap: wrap; gap: .5rem; justify-content: space-between; align-items: center;
}

/* --- Focus styles (a11y) --- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px;
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}