/*
Theme Name: Study Buddy
Description: Modern, simple theme for the Study Buddy AI study website. Works with the Study Buddy Core plugin.
Version: 1.0.0
Requires PHP: 7.4
Text Domain: study-buddy-theme
*/

:root{
  --sb-bg:#FAFAFF;--sb-surface:#FFFFFF;--sb-ink:#1B1B3A;--sb-muted:#5E5E7E;--sb-line:#E4E4F2;
  --sb-brand:#5B3DF5;--sb-brand-ink:#FFFFFF;--sb-soft:#EEEAFF;--sb-mint:#12A87A;--sb-sun:#FFC94D;
}
@media (prefers-color-scheme:dark){
  :root{--sb-bg:#12122A;--sb-surface:#1B1B3A;--sb-ink:#F2F2FF;--sb-muted:#A6A6C6;--sb-line:#2E2E52;--sb-brand:#8B74FF;--sb-brand-ink:#12122A;--sb-soft:#26264D;--sb-mint:#3DDBA6}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--sb-bg);color:var(--sb-ink);font:16px/1.6 ui-rounded,"SF Pro Rounded","Segoe UI",system-ui,-apple-system,Roboto,sans-serif}
a{color:inherit}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--sb-brand);outline-offset:3px;border-radius:8px}
.screen-reader-text{position:absolute;left:-9999px}

.sbt-wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.sbt-header{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.sbt-logo{font-weight:800;font-size:1.3rem;letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:8px}
.sbt-logo i{width:26px;height:26px;border-radius:8px;background:var(--sb-brand);display:inline-block;position:relative}
.sbt-logo i::after{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--sb-sun)}
.sbt-nav{display:flex;align-items:center;gap:22px}
.sbt-nav a{text-decoration:none;color:var(--sb-muted);font-weight:600;font-size:.95rem}
.sbt-nav a:hover{color:var(--sb-ink)}
.sbt-nav .sbt-btn{color:var(--sb-brand-ink)}
.sbt-nav .sbt-menu{display:flex;gap:22px;list-style:none;margin:0;padding:0}

.sbt-btn{display:inline-block;border:0;cursor:pointer;font:inherit;font-weight:700;padding:12px 22px;border-radius:999px;background:var(--sb-brand);color:var(--sb-brand-ink);text-decoration:none;text-align:center}
.sbt-btn.ghost{background:transparent;color:var(--sb-ink);border:1.5px solid var(--sb-line)}
.sbt-btn:hover{filter:brightness(1.08)}

.sbt-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:56px 0 72px}
.sbt-hero h1{font-size:clamp(2.2rem,5.4vw,3.6rem);line-height:1.05;letter-spacing:-.035em;margin:0 0 18px;max-width:14ch}
.sbt-lead{font-size:1.15rem;color:var(--sb-muted);max-width:44ch;margin:0 0 26px}
.sbt-cta{display:flex;gap:10px;flex-wrap:wrap}
.sbt-note{color:var(--sb-muted);font-size:.88rem;margin-top:14px}
.sbt-demo{background:var(--sb-surface);border:1px solid var(--sb-line);border-radius:24px;padding:20px;box-shadow:0 20px 50px -20px rgba(91,61,245,.35)}
.sbt-q{background:var(--sb-soft);border-radius:16px 16px 4px 16px;padding:12px 16px;margin:0 0 14px auto;max-width:88%;font-weight:600;width:fit-content}
.sbt-a{border:1px solid var(--sb-line);border-radius:16px 16px 16px 4px;padding:14px 16px;font-size:.96rem}
.sbt-a ol{margin:8px 0 0;padding-left:20px}
.sbt-comp{display:flex;align-items:center;gap:8px;margin-top:14px;border:1.5px solid var(--sb-line);border-radius:999px;padding:6px 16px 6px 6px;color:var(--sb-muted);font-size:.92rem}
.sbt-comp b{background:var(--sb-soft);color:var(--sb-brand);font-size:.8rem;padding:8px 14px;border-radius:999px}

.sbt-section{padding:64px 0}
.sbt-section h2{font-size:clamp(1.7rem,3.6vw,2.4rem);letter-spacing:-.03em;line-height:1.15;margin:0 0 12px}
.sbt-sub{color:var(--sb-muted);max-width:52ch;margin:0 0 36px}
.sbt-tools{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px}
.sbt-tool{padding:22px 0;border-top:1px solid var(--sb-line)}
.sbt-tool h3{margin:0 0 4px;font-size:1.15rem}
.sbt-tool p{margin:0;color:var(--sb-muted)}

.sbt-plans{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.sbt-plan{background:var(--sb-surface);border:1.5px solid var(--sb-line);border-radius:24px;padding:28px;display:flex;flex-direction:column}
.sbt-plan.pro{border-color:var(--sb-brand);box-shadow:0 20px 50px -25px rgba(91,61,245,.5)}
.sbt-plan h3{margin:0;font-size:1.2rem;display:flex;align-items:center;gap:10px}
.sbt-badge{background:var(--sb-sun);color:#1B1B3A;font-size:.75rem;font-weight:800;padding:3px 10px;border-radius:999px}
.sbt-price{font-size:2.6rem;font-weight:800;letter-spacing:-.04em;margin:10px 0 2px}
.sbt-price small{font-size:1rem;font-weight:600;color:var(--sb-muted);letter-spacing:0}
.sbt-per{color:var(--sb-muted);font-size:.9rem;margin:0 0 18px}
.sbt-plan ul{list-style:none;padding:0;margin:0 0 24px;flex:1}
.sbt-plan li{padding:7px 0 7px 28px;position:relative}
.sbt-plan li::before{content:"";position:absolute;left:4px;top:13px;width:12px;height:7px;border-left:2.5px solid var(--sb-mint);border-bottom:2.5px solid var(--sb-mint);transform:rotate(-45deg)}
.sbt-plan li.no{color:var(--sb-muted)}
.sbt-plan li.no::before{border:0;width:10px;height:2.5px;background:var(--sb-line);transform:none;top:19px}

.sbt-join{background:var(--sb-brand);color:var(--sb-brand-ink);border-radius:28px;padding:48px 28px;text-align:center}
.sbt-join h2{margin-bottom:8px}
.sbt-join p{margin:0 auto 22px;max-width:46ch;opacity:.9}
.sbt-join .sbt-btn{background:var(--sb-ink);color:var(--sb-bg)}

.sbt-content{padding:32px 20px 64px;max-width:760px}
.sbt-content h1{font-size:2rem;letter-spacing:-.03em}
.sbt-app{padding:16px 20px 56px;max-width:820px}
.sbt-app h1{text-align:center;letter-spacing:-.03em;margin:0 0 16px}
.sb-ad{max-width:728px;margin:24px auto;text-align:center;color:var(--sb-muted);font-size:.8rem}
.sbt-footer{padding:36px 0 44px;color:var(--sb-muted);font-size:.9rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.sbt-footer a{text-decoration:none;margin-left:14px}

@media (max-width:820px){
  .sbt-hero,.sbt-tools,.sbt-plans{grid-template-columns:1fr}
  .sbt-hero{padding-top:28px;gap:32px}
  .sbt-nav a:not(.sbt-btn){display:none}
  .sbt-section{padding:44px 0}
}