/* App Home Showcase: app tokens, icon-led, spacious, flat (no gradients). */
body.theme-landing { background: #f7fdf9; }
.dr { --bg:#f7fdf9; --surface:#f0faf4; --surface2:#e4f5ec; --border:#c8e8d6; --accent:#1b9e5c; --accent2:#4dba84; --text:#1a2e24; --muted:#6b8f7a; --amber:#e8b86d; --red:#e88a8a;
  overflow-x: clip; background: var(--bg); color: var(--text); font: 17px/1.6 Geist, system-ui, sans-serif; -webkit-font-smoothing: antialiased; min-height: 100vh; }
.dr * { box-sizing: border-box; } .dr a { color: inherit; text-decoration: none; }
.dr h1, .dr h2, .dr h3 { margin: 0; font-weight: 600; letter-spacing: -.035em; line-height: 1.08; }
.dr-nav, .dr section, .dr-foot { max-width: 1160px; margin: 0 auto; padding-left: 32px; padding-right: 32px; }
.dr-nav { display: flex; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 24px; }
.dr-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: -.03em; } .dr-nav nav { display: flex; gap: 32px; font-size: 15px; color: var(--muted); font-weight: 500; } .dr-nav nav a:hover { color: var(--text); }
.dr-btn { display: inline-flex; align-items: center; background: var(--accent); color: #fff !important; font-weight: 600; font-size: 16px; padding: 15px 26px; border-radius: 12px; transition: opacity .15s, transform .15s; } .dr-btn:hover { opacity: .9; transform: translateY(-1px); } .dr-sm { padding: 10px 18px; font-size: 14px; }
.dr-alt { background: var(--surface2); border: 1px solid var(--border); color: var(--accent) !important; } .dr-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.dr-i { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: var(--surface2); border: 1px solid var(--border); color: var(--accent); flex: none; } .dr-i svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.dr-i.w { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.28); color: #fff; } .dr-i.r { background: rgba(217,100,93,.14); border-color: rgba(217,100,93,.25); color: #c4524c; } .dr-i.a { width: 28px; height: 28px; border-radius: 9px; background: #fdf3e3; border-color: #f1dcb2; color: #c98e3a; } .dr-i.a svg { width: 15px; height: 15px; }
.dr-pill { display: inline-flex; align-items: center; gap: 10px; background: var(--surface2); border: 1px solid var(--border); color: var(--accent); font-size: 13.5px; font-weight: 600; padding: 5px 14px 5px 5px; border-radius: 9999px; margin: 0 0 28px; } .dr-pill .dr-i { width: 26px; height: 26px; border-radius: 50%; background: #fff; } .dr-pill .dr-i svg { width: 14px; height: 14px; }
.dr-card { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; }
/* hero */
.dr-hero { display: grid; grid-template-columns: 1fr 1.05fr; gap: 72px; align-items: center; padding-top: 72px; padding-bottom: 120px; }
.dr-hero h1 { font-size: clamp(44px, 5.6vw, 76px); line-height: 1.02; letter-spacing: -.05em; } .dr-hero em { font-style: normal; color: var(--accent); }
.dr-lede { font-size: 20px; color: var(--muted); max-width: 440px; margin: 28px 0 40px; }
.dr-hero-r { position: relative; }
.dr-radial { position: absolute; left: 50%; top: 50%; width: 360px; height: 360px; margin: -180px 0 0 -180px; pointer-events: none; } .dr-radial i { position: absolute; inset: 0; border-radius: 50%; border: 1.5px solid var(--accent2); opacity: 0; animation: dr-ring 8s cubic-bezier(.2,.6,.3,1) infinite; } .dr-radial i:nth-child(2) { animation-delay: 2s; } .dr-radial i:nth-child(3) { animation-delay: 4s; } .dr-radial i:nth-child(4) { animation-delay: 6s; } @keyframes dr-ring { 0% { transform: scale(.9); opacity: .55; } 100% { transform: scale(3); opacity: 0; } }
.dr-win { position: relative; z-index: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 24px; padding: 24px; box-shadow: 0 24px 60px -30px rgba(26,46,36,.28); }
.dr-win-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; } .dr-win-top b { font-size: 17px; letter-spacing: -.02em; } .dr-av { width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.dr-mini { display: grid; grid-template-columns: 1.3fr 1fr; gap: 12px; margin-bottom: 8px; } .dr-mc { border-radius: 18px; padding: 16px; display: grid; gap: 2px; } .dr-mc .dr-i { margin-bottom: 18px; } .dr-mc b { font-size: 16px; } .dr-mc small { font-size: 13px; opacity: .8; } .dr-mc.t { background: var(--accent); color: #fff; } .dr-mc.b { background: #ffe7e3; border: 1px solid #f4c3bd; color: #4a1f1b; }
.dr-mlist { display: grid; } .dr-mr { display: grid; grid-template-columns: 40px 1fr auto 32px; gap: 14px; align-items: center; padding: 14px 0; border-top: 1px solid var(--border); } .dr-mr:first-child { border-top: 0; } .dr-mr b { display: block; font-size: 14.5px; font-weight: 500; } .dr-mr small { font-size: 12.5px; color: var(--muted); } .dr-st { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--muted); } .dr-st i { width: 7px; height: 7px; border-radius: 50%; } .dr-mr em { font-style: normal; font-size: 17px; font-weight: 500; text-align: right; }
.dr-orb { display: flex; align-items: center; gap: 16px; margin-top: 8px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; } .dr-orb-c { position: relative; width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: var(--surface2); border: 1px solid var(--border); flex: none; } .dr-orb-c i { position: absolute; inset: -1px; border-radius: 50%; border: 1.5px solid var(--accent2); opacity: 0; animation: dr-orb 3.6s ease-out infinite; } .dr-orb-c i:nth-child(2) { animation-delay: 1.8s; } @keyframes dr-orb { from { transform: scale(1); opacity: .7; } to { transform: scale(2); opacity: 0; } }
.dr-wave { flex: 1; display: flex; gap: 3px; align-items: center; justify-content: center; height: 40px; } .dr-wave s { width: 3px; background: var(--accent2); border-radius: 2px; animation: dr-w 1.1s ease-in-out infinite alternate; } @keyframes dr-w { to { transform: scaleY(.3); } }
/* modes */
.dr-modes { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; padding-top: 0; padding-bottom: 120px; }
.dr-modes .dr-card { padding: 44px; display: flex; flex-direction: column; gap: 18px; min-height: 380px; border-radius: 28px; }
.dr-teach { background: var(--accent); border-color: var(--accent); color: #fff; } .dr-blitz { background: #ffe7e3; border-color: #f4c3bd; color: #4a1f1b; }
.dr-k { align-self: flex-start; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; padding: 6px 12px; border-radius: 99px; } .dr-teach .dr-k { background: rgba(255,255,255,.18); } .dr-blitz .dr-k { background: rgba(211,107,107,.16); color: #b04a45; }
.dr-modes h2 { font-size: clamp(34px, 4vw, 52px); max-width: 420px; } .dr-modes p { margin: 0; font-size: 18px; max-width: 420px; } .dr-teach p { color: rgba(255,255,255,.88); } .dr-blitz p { color: #7a4a45; }
.dr-60 { font-size: clamp(88px, 10vw, 128px); line-height: .9; font-weight: 700; letter-spacing: -.07em; color: #c4524c; } .dr-60 small { font-size: 26px; letter-spacing: 0; margin-left: 8px; font-weight: 600; color: #b04a45; }
.dr-modes ul { list-style: none; padding: 0; margin: auto 0 0; display: flex; flex-wrap: wrap; gap: 12px 24px; } .dr-modes li { display: flex; align-items: center; gap: 12px; font-weight: 500; font-size: 15.5px; }
/* how */
.dr-how, .dr-after, .dr-tutors, .dr-faq { padding-top: 0; padding-bottom: 120px; } .dr-how h2, .dr-tutors h2, .dr-faq h2, .dr-after h2 { font-size: clamp(32px, 4vw, 48px); } .dr-how h2, .dr-tutors h2, .dr-faq h2 { margin-bottom: 40px; }
.dr-how ol { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; } .dr-how li { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 32px; } .dr-how li > span:not(.dr-i) { position: absolute; top: 32px; right: 32px; font-size: 14px; font-weight: 500; color: var(--muted); } .dr-how h3 { font-size: 24px; margin: 28px 0 8px; } .dr-how p { margin: 0; color: var(--muted); }
/* after */
.dr-after { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; } .dr-after p { color: var(--muted); font-size: 18px; margin: 16px 0 32px; max-width: 420px; } .dr-after ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; } .dr-after li { display: flex; align-items: center; gap: 14px; font-weight: 500; }
.dr-res { padding: 32px; } .dr-score { display: flex; align-items: center; gap: 22px; margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--border); } .dr-score svg { width: 96px; transform: rotate(-90deg); } .dr-score circle { fill: none; stroke: var(--surface2); stroke-width: 3.4; } .dr-score .v { stroke: var(--accent); stroke-linecap: round; stroke-dasharray: 78 100; } .dr-score strong { font-size: 48px; font-weight: 600; letter-spacing: -.05em; line-height: 1; display: block; } .dr-score small { color: var(--muted); }
.dr-gl { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 12px; } .dr-gap { display: flex; align-items: center; gap: 12px; padding: 12px 14px; background: #fff8ea; border: 1px solid #f1dcb2; border-radius: 14px; margin-bottom: 10px; font-size: 15px; }
/* tutors */
.dr-tutors > div { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; } .dr-tutors article { padding: 28px; transition: border-color .15s, transform .15s; } .dr-tutors article:hover { border-color: var(--accent2); transform: translateY(-3px); } .dr-tutors h3 { font-size: 22px; margin: 32px 0 4px; } .dr-tutors p { margin: 0; color: var(--muted); font-size: 15px; }
/* faq */
.dr-faq { max-width: 820px !important; } .dr-faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 22px 26px; margin-bottom: 12px; } .dr-faq summary { cursor: pointer; font-weight: 600; font-size: 18px; list-style: none; display: flex; justify-content: space-between; } .dr-faq summary::-webkit-details-marker { display: none; } .dr-faq summary::after { content: '+'; color: var(--accent); font-size: 24px; line-height: 1; } .dr-faq details[open] summary::after { content: '–'; } .dr-faq p { margin: 12px 0 0; color: var(--muted); }
.dr section.dr-final { max-width: 1096px; margin: 0 auto 96px; background: var(--accent); color: #fff; border-radius: 32px; padding: 88px 48px; } .dr-final h2 { font-size: clamp(34px, 4.6vw, 56px); margin-bottom: 36px; } .dr-inv { background: #fff; color: var(--accent) !important; } .dr-line { background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.5); }
.dr-foot { display: flex; justify-content: space-between; padding-top: 24px; padding-bottom: 96px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); } .dr-foot nav { display: flex; gap: 24px; }
@media (max-width: 980px) { .dr-nav nav { display: none; } .dr-hero, .dr-after, .dr-modes { grid-template-columns: 1fr; gap: 56px; } .dr-hero { padding-bottom: 80px; } .dr-modes, .dr-how, .dr-after, .dr-tutors, .dr-faq { padding-bottom: 80px; } .dr-how ol { grid-template-columns: 1fr; } .dr-tutors > div { grid-template-columns: 1fr 1fr; } .dr-modes .dr-card { padding: 32px; min-height: 0; } .dr section.dr-final { margin: 0 16px 64px; padding: 56px 28px; } }
@media (max-width: 520px) { .dr-nav, .dr section, .dr-foot { padding-left: 20px; padding-right: 20px; } .dr-tutors > div { grid-template-columns: 1fr; } .dr-mr { grid-template-columns: 40px 1fr 32px; } .dr-st { display: none; } .dr-mini { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .dr-radial i, .dr-orb-c i, .dr-wave s { animation: none !important; } .dr-radial i, .dr-orb-c i { opacity: .25; } }

/* ---- interactive + scroll animation layer ---- */
.dr-progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: var(--accent); z-index: 50; }
.dr-head { position: sticky; top: 0; z-index: 40; background: rgba(247,253,249,.92); backdrop-filter: blur(8px); border-bottom: 1px solid transparent; transition: border-color .2s; } .dr-head.scrolled { border-bottom-color: var(--border); }
.dr-head .dr-nav { padding-top: 16px; padding-bottom: 16px; } .dr-nav nav a { position: relative; padding: 4px 0; } .dr-nav nav a::after { content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--accent); transform: scaleX(0); transition: transform .25s; } .dr-nav nav a.on { color: var(--text); } .dr-nav nav a.on::after { transform: scaleX(1); }
.dr [data-r] { opacity: 0; transform: translateY(32px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); transition-delay: var(--d, 0ms); }
.dr [data-r="left"] { transform: translateX(-36px); } .dr [data-r="right"] { transform: translateX(36px); } .dr [data-r="scale"] { transform: scale(.94); }
.dr [data-r].in { opacity: 1; transform: none; }
.dr-how li .dr-i { transition: transform .5s cubic-bezier(.3,1.6,.5,1) .25s; transform: scale(.4); } .dr-how li.in .dr-i { transform: scale(1); }
.dr-gap, .dr-gapb { }
/* window states */
.dr-win { transition: translate .1s linear; } .dr-screens { position: relative; min-height: 318px; }
.dr-s { display: none; } .dr-s.on { display: block; animation: dr-fade .35s ease; } @keyframes dr-fade { from { opacity: 0; transform: translateY(8px); } }
.dr-back { display: none; align-items: center; gap: 6px; border: 0; background: none; font: inherit; font-size: 14px; color: var(--accent); font-weight: 500; cursor: pointer; padding: 4px 8px 4px 0; } .dr-win.sub .dr-back { display: inline-flex; } .dr-win.sub .dr-greet { display: none; } .dr-back svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transform: rotate(180deg); }
button.dr-mc { text-align: left; font: inherit; border: 0; cursor: pointer; color: inherit; transition: transform .2s, box-shadow .2s; } button.dr-mc.t { color: #fff; } button.dr-mc.b { border: 1px solid #f4c3bd; color: #4a1f1b; } button.dr-mc:hover { transform: translateY(-3px); box-shadow: 0 12px 24px -12px rgba(26,46,36,.4); } button.dr-mc:focus-visible { outline: 3px solid var(--text); outline-offset: 2px; } button.dr-mc.on { box-shadow: 0 0 0 3px var(--bg), 0 0 0 5px var(--text); }
.dr-chat { display: grid; gap: 10px; align-content: start; min-height: 232px; } .dr-m { max-width: 86%; padding: 11px 14px; border-radius: 16px; font-size: 14px; line-height: 1.45; animation: dr-pop .35s cubic-bezier(.3,1.4,.5,1); } .dr-m.ai { background: var(--surface2); border: 1px solid var(--border); border-bottom-left-radius: 4px; } .dr-m.you { background: var(--accent); color: #fff; justify-self: end; border-bottom-right-radius: 4px; } @keyframes dr-pop { from { opacity: 0; transform: translateY(10px) scale(.96); } }
.dr-dots { display: inline-flex; gap: 4px; padding: 14px 16px; background: var(--surface2); border: 1px solid var(--border); border-radius: 16px; border-bottom-left-radius: 4px; width: 58px; } .dr-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: dr-b 1s infinite; } .dr-dots i:nth-child(2) { animation-delay: .15s; } .dr-dots i:nth-child(3) { animation-delay: .3s; } @keyframes dr-b { 50% { transform: translateY(-4px); opacity: .5; } }
.dr-bl { text-align: center; padding: 8px 0; } .dr-bl small { color: var(--muted); } .dr-clock { position: relative; width: 168px; height: 168px; margin: 8px auto 12px; display: grid; place-items: center; } .dr-clock svg { position: absolute; inset: 0; transform: rotate(-90deg); } .dr-clock circle { fill: none; stroke: var(--surface2); stroke-width: 6; } .dr-clock .v { stroke: #d9645d; stroke-linecap: round; stroke-dasharray: 276.5; transition: stroke-dashoffset 1s linear; } .dr-clock strong { font-size: 52px; font-weight: 700; letter-spacing: -.05em; color: #b04a45; font-variant-numeric: tabular-nums; }
.dr-bl .dr-fin { border: 0; margin-top: 8px; background: #d9645d; color: #fff; font: inherit; font-weight: 600; padding: 10px 20px; border-radius: 12px; cursor: pointer; }
.dr-mr { cursor: pointer; transition: background .15s, padding .15s; border-radius: 12px; } .dr-mr:hover { background: var(--surface); padding-left: 8px; padding-right: 8px; margin: 0 -8px; }
/* modes: blitz timer */
.dr-60 { cursor: pointer; user-select: none; font-variant-numeric: tabular-nums; } .dr-hint { font-size: 13px; opacity: .7; }
.dr-tbtn { align-self: flex-start; border: 0; background: #d9645d; color: #fff; font: inherit; font-weight: 600; padding: 12px 20px; border-radius: 12px; cursor: pointer; transition: transform .15s; } .dr-tbtn:hover { transform: translateY(-2px); }
.dr-tbtn:focus-visible, .dr-gapb:focus-visible, .dr-tc:focus-visible { outline: 3px solid var(--text); outline-offset: 2px; }
/* results */
.dr-score .v { stroke-dasharray: 0 100; transition: stroke-dasharray 1.6s cubic-bezier(.2,.7,.2,1); }
.dr-gapb { all: unset; box-sizing: border-box; cursor: pointer; display: block; width: 100%; background: #fff8ea; border: 1px solid #f1dcb2; border-radius: 14px; margin-bottom: 10px; padding: 12px 14px; transition: background .15s; } .dr-gapb:hover { background: #fff2d9; }
.dr-gapb .row { display: flex; align-items: center; gap: 12px; font-size: 15px; } .dr-gapb .chev { margin-left: auto; width: 16px; height: 16px; stroke: #c98e3a; fill: none; stroke-width: 2; transition: transform .25s; } .dr-gapb[aria-expanded=true] .chev { transform: rotate(90deg); }
.dr-gapb .more { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s ease; } .dr-gapb[aria-expanded=true] .more { grid-template-rows: 1fr; } .dr-gapb .more > span { overflow: hidden; display: block; min-height: 0; } .dr-gapb .more p { margin: 10px 0 2px 40px; font-size: 14px; color: #7a5a22; }
/* tutors */
.dr-tc { all: unset; box-sizing: border-box; cursor: pointer; padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: 24px; transition: border-color .2s, transform .2s, background .2s; display: block; } .dr-tc:hover { transform: translateY(-3px); border-color: var(--accent2); } .dr-tc[aria-pressed=true] { background: var(--surface2); border-color: var(--accent); }
.dr-tc h3 { font-size: 22px; margin: 32px 0 4px; } .dr-tc p { margin: 0; color: var(--muted); font-size: 15px; }
.dr-say { margin-top: 20px; display: flex; align-items: flex-start; gap: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 20px 24px; min-height: 82px; } .dr-say .dr-i { margin-top: 2px; } .dr-say small { display: block; color: var(--muted); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 4px; } .dr-say p { margin: 0; font-size: 18px; letter-spacing: -.01em; }
.dr-tutors > div.dr-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 980px) { .dr-tutors > div.dr-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .dr-tutors > div.dr-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .dr [data-r] { opacity: 1; transform: none; transition: none; } .dr-score .v { transition: none; } .dr-progress { display: none; } }

.dr section { scroll-margin-top: 72px; }

/* ---- phone (from design 6, flat) ---- */
.pr-phone { position: relative; z-index: 1; width: 320px; height: 640px; margin: 0 auto; border-radius: 46px; background: #0f1d16; padding: 10px; box-shadow: 0 30px 60px -28px rgba(26,46,36,.5); }
.pr-notch { position: absolute; top: 20px; left: 50%; transform: translateX(-50%); width: 92px; height: 24px; background: #0f1d16; border-radius: 20px; z-index: 3; }
.pr-scr { display: none; position: absolute; inset: 10px; border-radius: 38px; background: var(--bg); padding: 56px 16px 84px; flex-direction: column; gap: 10px; overflow: hidden; } .pr-scr.on { display: flex; animation: dr-fade .35s ease; } @keyframes dr-fade { from { opacity: 0; transform: scale(.98); } }
.pr-scr h4 { margin: 0 0 4px; font-size: 16px; text-align: center; letter-spacing: -.02em; }
.pr-top { display: flex; justify-content: space-between; align-items: center; } .pr-top b { font-size: 16px; letter-spacing: -.02em; } .pr-top .dr-av { width: 28px; height: 28px; font-size: 12px; }
.pr-h { margin: 6px 0 0; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.pr-phone .dr-mini { margin: 4px 0 0; gap: 8px; grid-template-columns: 1.2fr 1fr; } .pr-phone .dr-mc { padding: 12px; border-radius: 16px; } .pr-phone .dr-mc .dr-i { width: 32px; height: 32px; margin-bottom: 10px; } .pr-phone .dr-mc b { font-size: 14px; } .pr-phone .dr-mc small { font-size: 11.5px; }
.pr-phone .dr-mr { grid-template-columns: 34px 1fr auto; gap: 10px; padding: 9px 0; } .pr-phone .dr-mr .dr-i { width: 34px; height: 34px; border-radius: 10px; } .pr-phone .dr-mr b { font-size: 13px; } .pr-phone .dr-mr small { font-size: 11.5px; } .pr-phone .dr-mr em { font-size: 15px; color: var(--accent); } .pr-phone .dr-mr:hover { padding-left: 0; padding-right: 0; margin: 0; background: none; }
.pr-phone .dr-chat { min-height: 0; flex: 1; overflow: hidden; align-content: start; } .pr-phone .dr-m { font-size: 13px; padding: 10px 12px; }
.pr-orb2 { display: flex; align-items: center; gap: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 10px 12px; } .pr-orb2 .dr-wave { height: 30px; }
.pr-orbc { position: relative; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--surface2); border: 1px solid var(--border); flex: none; } .pr-orbc i { position: absolute; inset: -1px; border-radius: 50%; border: 1.5px solid var(--accent2); opacity: 0; animation: pr-orb 3.6s ease-out infinite; } .pr-orbc i:nth-child(2) { animation-delay: 1.8s; } @keyframes pr-orb { from { transform: scale(1); opacity: .7; } to { transform: scale(2); opacity: 0; } }
.pr-phone .dr-bl { text-align: center; } .pr-phone .dr-clock { width: 150px; height: 150px; } .pr-phone .dr-clock strong { font-size: 44px; }
.pr-sc { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 16px; text-align: center; } .pr-sc strong { display: block; font-size: 52px; font-weight: 600; letter-spacing: -.05em; line-height: 1; color: var(--accent); } .pr-sc span { font-size: 12.5px; color: var(--muted); }
.pr-pg { display: flex; align-items: center; gap: 10px; padding: 9px 10px; background: #fff8ea; border: 1px solid #f1dcb2; border-radius: 12px; font-size: 12.5px; }
.pr-tabbar { position: absolute; left: 10px; right: 10px; bottom: 10px; height: 68px; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border-top: 1px solid var(--border); border-radius: 0 0 38px 38px; padding: 6px 6px 10px; }
.pr-tabbar button { border: 0; background: none; font: inherit; font-size: 10.5px; font-weight: 500; color: var(--muted); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; cursor: pointer; border-radius: 14px; transition: color .15s, background .15s; } .pr-tabbar button svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; } .pr-tabbar button:hover { color: var(--text); } .pr-tabbar button.on { color: var(--accent); background: var(--surface2); } .pr-tabbar button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
@media (max-width: 360px) { .pr-phone { width: 290px; height: 600px; } }

.pr-sec { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding-top: 0; padding-bottom: 120px; }
.pr-side h2 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 16px; } .pr-side > p:not(.dr-pill) { color: var(--muted); font-size: 18px; margin: 0 0 32px; max-width: 420px; }
.pr-tabs { display: grid; gap: 12px; max-width: 460px; } .pr-tabs button { all: unset; box-sizing: border-box; cursor: pointer; padding: 18px 22px; border-radius: 18px; display: grid; gap: 2px; background: var(--surface); border: 1px solid var(--border); transition: transform .2s, background .2s, border-color .2s; } .pr-tabs button:hover { transform: translateX(4px); } .pr-tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; } .pr-tabs button.on { background: var(--surface2); border-color: var(--accent); }
.pr-tabs b { font-size: 19px; letter-spacing: -.02em; } .pr-tabs .on b { color: var(--accent); } .pr-tabs span { color: var(--muted); font-size: 14.5px; }
.pr-stage { position: relative; display: flex; justify-content: center; } .pr-rad { width: 380px; height: 380px; margin: -190px 0 0 -190px; }
.pr-phone .dr-radial { display: none; }
@media (max-width: 980px) { .pr-sec { grid-template-columns: 1fr; gap: 56px; padding-bottom: 80px; } .pr-stage { order: -1; } }
@media (max-width: 360px) { .pr-phone { width: 290px; height: 600px; } }
@media (prefers-reduced-motion: reduce) { .pr-orbc i { animation: none !important; opacity: .25; } }

/* ---- v16: swipe transitions + autoplay progress ---- */
.pr-phone { overflow: hidden; }
.pr-scr { display: flex; opacity: 0; pointer-events: none; transform: translateX(var(--x, 100%)); transition: transform .55s cubic-bezier(.3,.8,.25,1), opacity .35s ease; animation: none !important; }
.pr-scr.on { opacity: 1; pointer-events: auto; }
.pr-tabs button { position: relative; overflow: hidden; }
.pr-prog { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: var(--accent); }
.pr-tabs button.run .pr-prog { animation: pr-fill var(--dur) linear forwards; } @keyframes pr-fill { to { width: 100%; } }
@media (prefers-reduced-motion: reduce) { .pr-scr { transition: none; } .pr-tabs button.run .pr-prog { animation: none; } }

/* ---- v17: upload, flashcards, export ---- */
.dr-up, .dr-fl { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding-top: 0; padding-bottom: 120px; }
.dr-up h2, .dr-fl h2, .dr-ex-head h2 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 16px; } .dr-up-l > p:not(.dr-pill), .dr-fl-l > p:not(.dr-pill), .dr-ex-head p { color: var(--muted); font-size: 18px; margin: 0 0 28px; max-width: 440px; }
.dr-up ul, .dr-fl ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; } .dr-up li, .dr-fl li { display: flex; align-items: center; gap: 14px; font-weight: 500; }
.dr-drop { padding: 20px; border-radius: 28px; }
.dr-zone { display: grid; justify-items: center; gap: 6px; text-align: center; padding: 36px 24px; border: 2px dashed var(--border); border-radius: 20px; background: var(--bg); cursor: pointer; transition: border-color .2s, background .2s; } .dr-zone:hover, .dr-zone.over { border-color: var(--accent); background: var(--surface2); } .dr-zone:focus-visible { outline: 3px solid var(--text); outline-offset: 2px; }
.dr-zone .dr-i { width: 52px; height: 52px; border-radius: 16px; margin-bottom: 8px; background: var(--surface2); } .dr-zone .dr-i svg { width: 24px; height: 24px; } .dr-zone b { font-size: 18px; letter-spacing: -.02em; } .dr-zone span:not(.dr-i) { color: var(--muted); font-size: 13.5px; max-width: 300px; }
.dr-sample { margin-top: 12px; border: 1px solid var(--border); background: #fff; color: var(--accent); font: inherit; font-weight: 600; font-size: 14px; padding: 9px 16px; border-radius: 12px; cursor: pointer; } .dr-sample:hover { background: var(--surface2); }
.dr-files { display: grid; gap: 10px; margin-top: 14px; min-height: 0; } .dr-fr { display: grid; grid-template-columns: 40px 1fr 24px; gap: 14px; align-items: center; padding: 12px 14px; background: #fff; border: 1px solid var(--border); border-radius: 16px; animation: dr-in .4s cubic-bezier(.3,1.3,.5,1); } @keyframes dr-in { from { opacity: 0; transform: translateY(-8px) scale(.97); } }
.dr-fr b { display: block; font-size: 14.5px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; } .dr-fr small { color: var(--muted); font-size: 12.5px; } .dr-pb { height: 4px; border-radius: 4px; background: var(--surface2); margin-top: 7px; overflow: hidden; } .dr-pb i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 4px; transition: width 1.4s ease; } .dr-fr.done .dr-pb { display: none; }
.dr-ok { width: 24px; height: 24px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; opacity: 0; transform: scale(.5); transition: opacity .3s, transform .3s cubic-bezier(.3,1.6,.5,1); } .dr-ok svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; } .dr-fr.done .dr-ok { opacity: 1; transform: none; }
/* flashcards */
.dr-deck { max-width: 460px; width: 100%; justify-self: center; } .dr-deck-top { display: flex; justify-content: space-between; font-size: 13.5px; color: var(--muted); margin-bottom: 14px; font-weight: 500; } .dr-src { background: var(--surface2); border: 1px solid var(--border); color: var(--accent); padding: 2px 10px; border-radius: 99px; font-size: 12px; font-weight: 600; }
.dr-stack { position: relative; height: 300px; perspective: 1400px; } .dr-stack::before, .dr-stack::after { content: ''; position: absolute; left: 14px; right: 14px; top: 10px; bottom: -10px; background: var(--surface2); border: 1px solid var(--border); border-radius: 26px; z-index: 0; } .dr-stack::after { left: 28px; right: 28px; top: 20px; bottom: -20px; opacity: .6; }
.dr-fc { all: unset; box-sizing: border-box; position: absolute; inset: 0; z-index: 1; cursor: pointer; transform-style: preserve-3d; transition: transform .6s cubic-bezier(.3,.8,.3,1); } .dr-fc[hidden] { display: none; } .dr-fc.flip { transform: rotateY(180deg); } .dr-fc:focus-visible { outline: 3px solid var(--text); outline-offset: 4px; border-radius: 26px; }
.dr-face { position: absolute; inset: 0; border-radius: 26px; padding: 30px; display: flex; flex-direction: column; justify-content: center; gap: 14px; backface-visibility: hidden; -webkit-backface-visibility: hidden; border: 1px solid var(--border); text-align: left; } .dr-front { background: #fff; } .dr-back { background: var(--accent); color: #fff; border-color: var(--accent); transform: rotateY(180deg); }
.dr-face small { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; opacity: .65; } .dr-face b { font-size: 22px; font-weight: 600; letter-spacing: -.025em; line-height: 1.25; } .dr-back b { font-size: 18px; font-weight: 500; line-height: 1.45; } .dr-face em { font-style: normal; font-size: 13px; color: var(--muted); margin-top: 8px; }
.dr-done { position: absolute; inset: 0; z-index: 1; background: #fff; border: 1px solid var(--border); border-radius: 26px; display: grid; place-content: center; justify-items: center; gap: 10px; text-align: center; } .dr-done[hidden] { display: none; } .dr-done .dr-i { background: var(--accent); color: #fff; border-color: var(--accent); width: 52px; height: 52px; border-radius: 50%; } .dr-done h3 { font-size: 24px; } .dr-done p { margin: 0; color: var(--muted); }
.dr-rate { display: flex; gap: 12px; margin-top: 34px; opacity: 0; transform: translateY(6px); pointer-events: none; transition: opacity .25s, transform .25s; } .dr-rate.on { opacity: 1; transform: none; pointer-events: auto; } .dr-rate button { flex: 1; border: 0; font: inherit; font-weight: 600; padding: 13px; border-radius: 14px; cursor: pointer; transition: transform .15s; } .dr-rate button:hover { transform: translateY(-2px); } .dr-no { background: #ffe7e3; color: #b04a45; border: 1px solid #f4c3bd !important; } .dr-yes { background: var(--accent); color: #fff; }
.dr-bar { height: 5px; border-radius: 5px; background: var(--surface2); margin-top: 18px; overflow: hidden; } .dr-bar i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 5px; transition: width .4s ease; }
/* export */
.dr-ex { padding-top: 0; padding-bottom: 120px; } .dr-ex-head { text-align: center; } .dr-ex-head p { margin: 0 auto 48px; }
.dr-ex-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 24px; align-items: stretch; }
.dr-fmts { display: grid; gap: 12px; align-content: start; } .dr-fmts button { all: unset; box-sizing: border-box; cursor: pointer; display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 16px; padding: 18px 22px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; transition: transform .2s, background .2s, border-color .2s; } .dr-fmts button:hover { transform: translateX(4px); } .dr-fmts button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; } .dr-fmts button.on { background: var(--surface2); border-color: var(--accent); }
.dr-fmts b { display: block; font-size: 17px; letter-spacing: -.02em; } .dr-fmts small { color: var(--muted); font-size: 13.5px; } .dr-fmts code { font: 500 12.5px Geist, monospace; background: #fff; border: 1px solid var(--border); padding: 3px 9px; border-radius: 8px; color: var(--muted); } .dr-fmts .on code { color: var(--accent); border-color: var(--accent2); }
.dr-prev { padding: 22px; border-radius: 28px; display: flex; flex-direction: column; gap: 16px; } .dr-prev-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; } .dr-prev-top span { font: 500 13.5px Geist, monospace; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dr-prev .dr-btn { padding: 9px 16px; font-size: 14px; gap: 8px; border: 0; cursor: pointer; } .dr-prev .dr-btn:disabled { opacity: .85; cursor: default; transform: none; } .dr-prev .dr-btn svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.dr-prev-body { flex: 1; min-height: 260px; background: #fff; border: 1px solid var(--border); border-radius: 18px; padding: 18px; overflow: hidden; } .dr-prev-body.swap { animation: dr-sw .35s ease; } @keyframes dr-sw { from { opacity: 0; transform: translateY(8px); } }
.dr-tb { width: 100%; border-collapse: collapse; font-size: 13px; } .dr-tb th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); padding: 0 10px 10px; } .dr-tb td { vertical-align: top; padding: 10px; border-top: 1px solid var(--border); } .dr-tb td:first-child { font-weight: 500; width: 42%; }
.dr-pre { margin: 0; font: 400 12.5px/1.65 ui-monospace, 'JetBrains Mono', monospace; white-space: pre-wrap; color: #34483c; }
.dr-page { background: #fff; border: 1px solid var(--border); box-shadow: 0 8px 24px -14px rgba(26,46,36,.3); padding: 22px 26px; width: 78%; margin: 0 auto; display: grid; gap: 9px; } .dr-page h4 { margin: 0 0 4px; font-size: 16px; } .dr-page h5 { margin: 10px 0 0; font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); } .dr-page i { display: block; height: 6px; border-radius: 4px; background: var(--surface2); }
.dr-note { margin: 0; font-size: 12.5px; color: var(--muted); }
@media (max-width: 980px) { .dr-up, .dr-fl { grid-template-columns: 1fr; gap: 48px; padding-bottom: 80px; } .dr-ex { padding-bottom: 80px; } .dr-ex-grid { grid-template-columns: 1fr; } .dr-nav nav { display: none; } }
@media (prefers-reduced-motion: reduce) { .dr-fc { transition: none; } .dr-fr, .dr-prev-body.swap { animation: none; } .dr-pb i { transition: none; } }