/* ==========================================================================
   LUXE LENS MEDIA ACADEMY — Design System
   Dark + Electric Accent
   ========================================================================== */

:root {
  /* Core surfaces */
  --bg:            #08090D;
  --bg-2:          #0C0E14;
  --surface:       #11141C;
  --surface-2:     #171B25;
  --surface-3:     #1E2330;
  --line:          rgba(255,255,255,0.08);
  --line-strong:   rgba(255,255,255,0.16);

  /* Type */
  --text:          #EEF1F7;
  --text-2:        #A8B0C2;
  --text-3:        #6E7789;

  /* Accents */
  --accent:        #7C5CFF;
  --accent-2:      #22D3EE;
  --accent-3:      #FF5CA8;
  --accent-soft:   rgba(124,92,255,0.14);
  --accent-line:   rgba(124,92,255,0.38);
  --cyan-soft:     rgba(34,211,238,0.12);

  /* Semantic */
  --good:          #34D399;
  --warn:          #FBBF24;
  --bad:           #FB7185;

  /* Pillar colors */
  --p1: #22D3EE;
  --p2: #7C5CFF;
  --p3: #FF5CA8;
  --p4: #FFB020;

  /* Shape */
  --r-sm: 8px;
  --r:    14px;
  --r-lg: 22px;
  --r-xl: 30px;

  --shadow:    0 18px 40px -18px rgba(0,0,0,0.85);
  --shadow-lg: 0 40px 80px -30px rgba(0,0,0,0.9);
  --glow:      0 0 0 1px var(--accent-line), 0 18px 50px -20px rgba(124,92,255,0.55);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --maxw: 1240px;
  --nav-h: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient background glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(124,92,255,0.20), transparent 60%),
    radial-gradient(760px 460px at 92% 4%,  rgba(34,211,238,0.13), transparent 60%),
    radial-gradient(700px 700px at 50% 115%, rgba(255,92,168,0.09), transparent 60%);
}

/* Fine grain texture */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

#app, .page { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.15;
  margin: 0 0 .5em;
}
h1 { font-size: clamp(2.1rem, 4.6vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 2.9vw, 2.15rem); }
h3 { font-size: clamp(1.16rem, 1.9vw, 1.42rem); }
h4 { font-size: 1.04rem; }
p  { margin: 0 0 1.05em; color: var(--text-2); }
strong { color: var(--text); font-weight: 650; }
em { color: #CFD6E6; }

::selection { background: var(--accent); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg-2); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent), var(--accent-2));
  border-radius: 20px;
  border: 3px solid var(--bg-2);
}

/* ===================== LAYOUT ===================== */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 880px; }
.section { padding: 74px 0; }
.section-sm { padding: 46px 0; }

.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.center { text-align: center; }
.mt0{margin-top:0}.mb0{margin-bottom:0}.mt24{margin-top:24px}.mt40{margin-top:40px}

/* ===================== NAV ===================== */
.nav {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  display: flex; align-items: center;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: rgba(8,9,13,0.72);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  display: grid; place-items: center;
  box-shadow: 0 8px 22px -8px rgba(124,92,255,0.9);
}
.brand-mark svg { width: 19px; height: 19px; }
.brand-txt { font-size: .97rem; line-height: 1.1; }
.brand-txt small { display: block; font-size: .63rem; letter-spacing: .22em; text-transform: uppercase; color: var(--text-3); font-family: var(--font); font-weight: 600; }

.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: 100px; font-size: .885rem; font-weight: 550;
  color: var(--text-2); transition: .18s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: #fff; background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent-line); }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); color: var(--text); border-radius: 10px; padding: 8px 11px; cursor: pointer; }

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px; border-radius: 100px;
  font-family: var(--font); font-weight: 620; font-size: .93rem;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), #9E7BFF 55%, var(--accent-2));
  color: #0A0B10; box-shadow: 0 14px 34px -14px rgba(124,92,255,0.95);
}
.btn-primary:hover { box-shadow: 0 20px 44px -14px rgba(124,92,255,1); transform: translateY(-2px); }
.btn-ghost { background: var(--surface-2); color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--surface-3); border-color: var(--accent-line); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-outline:hover { border-color: var(--accent); color: #fff; }
.btn-sm { padding: 8px 15px; font-size: .82rem; }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }

/* ===================== CARDS / SURFACES ===================== */
.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg-2) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 26px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.card-hover { transition: .22s ease; }
.card-hover:hover { transform: translateY(-4px); border-color: var(--accent-line); box-shadow: var(--shadow-lg); }
.glass {
  background: rgba(23,27,37,0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .7rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent-2); }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 100px;
  font-size: .72rem; font-weight: 650; letter-spacing: .04em;
  background: var(--surface-3); color: var(--text-2); border: 1px solid var(--line);
}
.pill-accent { background: var(--accent-soft); color: #C6B6FF; border-color: var(--accent-line); }
.pill-cyan   { background: var(--cyan-soft); color: #8FE9F7; border-color: rgba(34,211,238,0.35); }
.pill-good   { background: rgba(52,211,153,0.12); color: #7EE7C0; border-color: rgba(52,211,153,0.3); }
.pill-warn   { background: rgba(251,191,36,0.12); color: #F6D98A; border-color: rgba(251,191,36,0.3); }

.lede { font-size: 1.1rem; color: var(--text-2); max-width: 68ch; }

/* ===================== HERO ===================== */
.hero { padding: 90px 0 70px; position: relative; }
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 54px; align-items: center; }
.hero h1 span.grad {
  background: linear-gradient(100deg, var(--accent-2), var(--accent) 45%, var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stats { display: flex; gap: 34px; margin-top: 34px; flex-wrap: wrap; }
.hero-stat b { display: block; font-family: var(--font-display); font-size: 1.75rem; }
.hero-stat span { font-size: .74rem; letter-spacing: .13em; text-transform: uppercase; color: var(--text-3); }

.hero-visual {
  position: relative; border-radius: var(--r-xl); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-lg);
  background: linear-gradient(160deg, #141826, #0A0C12);
  aspect-ratio: 4/3;
}

/* ===================== PROGRESS ===================== */
.progress-track { height: 8px; border-radius: 100px; background: var(--surface-3); overflow: hidden; }
.progress-fill {
  height: 100%; border-radius: 100px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0%; transition: width .5s cubic-bezier(.2,.8,.2,1);
  box-shadow: 0 0 16px rgba(124,92,255,.7);
}
.progress-thin { height: 5px; }

.ring { --pct: 0; width: 118px; height: 118px; position: relative; flex: none; }
.ring svg { transform: rotate(-90deg); width: 100%; height: 100%; }
.ring .ring-bg { stroke: var(--surface-3); }
.ring .ring-fg { stroke: url(#ringgrad); stroke-linecap: round; transition: stroke-dashoffset .7s cubic-bezier(.2,.8,.2,1); }
.ring-label {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
}

/* ===================== MODULE CARDS ===================== */
.mod-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px,1fr)); gap: 20px; }
.mod-card {
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 22px; transition: .22s ease; position: relative; overflow: hidden;
}
.mod-card::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--pc, var(--accent)), transparent);
  opacity: .85;
}
.mod-card:hover { transform: translateY(-5px); border-color: var(--accent-line); box-shadow: var(--shadow-lg); }
.mod-card.done { border-color: rgba(52,211,153,0.32); }
.mod-num {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .16em;
  color: var(--pc, var(--accent)); font-weight: 700;
}
.mod-card h3 { font-size: 1.09rem; margin: 8px 0 8px; }
.mod-card p { font-size: .875rem; color: var(--text-3); margin-bottom: 16px; flex: 1; }
.mod-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; font-size: .73rem; color: var(--text-3); }
.mod-check {
  position: absolute; top: 18px; right: 18px; width: 22px; height: 22px; border-radius: 50%;
  border: 1.5px solid var(--line-strong); display: grid; place-items: center; font-size: 11px;
}
.mod-card.done .mod-check { background: var(--good); border-color: var(--good); color: #07130E; }

/* ===================== PILLAR HEADER ===================== */
.pillar-head {
  display: flex; align-items: flex-start; gap: 18px; margin: 52px 0 22px;
  padding-bottom: 18px; border-bottom: 1px solid var(--line);
}
.pillar-badge {
  width: 52px; height: 52px; flex: none; border-radius: 15px;
  display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 1.05rem;
  background: color-mix(in srgb, var(--pc) 16%, transparent);
  color: var(--pc); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--pc) 40%, transparent);
}
.pillar-head h2 { margin: 0 0 3px; }
.pillar-head p { margin: 0; font-size: .9rem; }

/* ===================== READER ===================== */
.reader-layout { display: grid; grid-template-columns: 268px minmax(0,1fr) 236px; gap: 40px; align-items: start; }
.sidebar { position: sticky; top: calc(var(--nav-h) + 22px); max-height: calc(100vh - var(--nav-h) - 44px); overflow-y: auto; padding-right: 6px; }
.sidebar::-webkit-scrollbar { width: 5px; }
.side-title { font-size: .68rem; letter-spacing: .19em; text-transform: uppercase; color: var(--text-3); font-weight: 700; margin: 22px 0 10px; }
.side-link {
  display: flex; align-items: center; gap: 10px; padding: 8px 11px; border-radius: 10px;
  font-size: .84rem; color: var(--text-2); transition: .15s; line-height: 1.35;
}
.side-link:hover { background: var(--surface-2); color: var(--text); }
.side-link.active { background: var(--accent-soft); color: #fff; box-shadow: inset 0 0 0 1px var(--accent-line); }
.side-link .n { font-family: var(--font-mono); font-size: .7rem; color: var(--text-3); flex: none; }
.side-link.done .n { color: var(--good); }

.toc { position: sticky; top: calc(var(--nav-h) + 22px); font-size: .82rem; }
.toc a { display: block; padding: 6px 0 6px 13px; color: var(--text-3); border-left: 2px solid var(--line); transition: .15s; }
.toc a:hover, .toc a.active { color: var(--text); border-left-color: var(--accent); }

.article { max-width: 76ch; }
.article h2 { margin-top: 2.1em; scroll-margin-top: 100px; }
.article h3 { margin-top: 1.7em; color: #E4E8F2; }
.article p, .article li { font-size: 1.02rem; }
.article ul, .article ol { padding-left: 1.25em; margin: 0 0 1.2em; color: var(--text-2); }
.article li { margin-bottom: .55em; }
.article li::marker { color: var(--accent); }
.article hr { border: none; border-top: 1px solid var(--line); margin: 2.6em 0; }

.article-head { padding: 34px 0 26px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.article-head h1 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); margin-bottom: .3em; }
.article-head .sub { font-size: 1.06rem; color: var(--text-2); max-width: 62ch; }

/* Callouts */
.callout {
  border-radius: var(--r); padding: 18px 20px; margin: 1.7em 0;
  border: 1px solid var(--line); background: var(--surface-2);
  border-left: 3px solid var(--accent);
}
.callout .ct { font-family: var(--font-display); font-weight: 700; font-size: .82rem; letter-spacing: .07em; text-transform: uppercase; color: var(--accent); margin-bottom: 7px; }
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }
.callout.tip     { border-left-color: var(--accent-2); } .callout.tip .ct { color: var(--accent-2); }
.callout.warn    { border-left-color: var(--warn); }     .callout.warn .ct { color: var(--warn); }
.callout.error   { border-left-color: var(--bad); }      .callout.error .ct { color: var(--bad); }
.callout.success { border-left-color: var(--good); }     .callout.success .ct { color: var(--good); }

/* Prompt boxes */
.prompt-box {
  background: #0A0C13; border: 1px solid var(--line-strong); border-radius: var(--r);
  padding: 0; margin: 1.5em 0; overflow: hidden;
}
.prompt-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 15px; background: var(--surface-2); border-bottom: 1px solid var(--line);
  font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; font-weight: 700; color: var(--text-3);
}
.prompt-body { padding: 16px 18px; font-family: var(--font-mono); font-size: .84rem; line-height: 1.7; color: #C9D3E8; white-space: pre-wrap; }
.copy-btn { background: none; border: 1px solid var(--line-strong); color: var(--text-2); border-radius: 7px; padding: 4px 10px; font-size: .7rem; cursor: pointer; font-family: var(--font); letter-spacing: .06em; }
.copy-btn:hover { color: #fff; border-color: var(--accent); }

/* Figures */
figure { margin: 2em 0; }
figure .figbox {
  background: linear-gradient(160deg, var(--surface-2), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px;
}
figure svg { width: 100%; height: auto; display: block; }
figcaption { margin-top: 11px; font-size: .81rem; color: var(--text-3); text-align: center; }

/* Tables */
.tbl { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: .9rem; }
.tbl th, .tbl td { padding: 11px 13px; text-align: left; border-bottom: 1px solid var(--line); }
.tbl th { font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); font-weight: 700; background: var(--surface-2); }
.tbl td { color: var(--text-2); }
.tbl tr:hover td { background: rgba(255,255,255,0.022); }

/* Key terms */
.terms { display: grid; gap: 10px; margin: 1.5em 0; }
.term { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r); padding: 13px 16px; }
.term b { color: var(--accent-2); font-family: var(--font-display); font-size: .95rem; }
.term span { display: block; font-size: .88rem; color: var(--text-2); margin-top: 2px; }

/* Checklist */
.checklist { list-style: none; padding: 0; margin: 1.2em 0; }
.checklist li {
  display: flex; gap: 11px; align-items: flex-start; padding: 10px 13px; margin-bottom: 7px;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r-sm);
  font-size: .92rem; color: var(--text-2); cursor: pointer; transition: .15s;
}
.checklist li:hover { border-color: var(--accent-line); }
.checklist li.checked { color: var(--text-3); text-decoration: line-through; opacity: .65; }
.cbox { width: 17px; height: 17px; border-radius: 5px; border: 1.5px solid var(--line-strong); flex: none; margin-top: 3px; display: grid; place-items: center; font-size: 10px; }
.checklist li.checked .cbox { background: var(--good); border-color: var(--good); color: #06120D; }

/* Workbook / notes */
.note-area {
  width: 100%; min-height: 150px; resize: vertical;
  background: var(--bg-2); border: 1px solid var(--line-strong); border-radius: var(--r);
  color: var(--text); padding: 15px 17px; font-family: var(--font); font-size: .95rem; line-height: 1.7;
  transition: .18s;
}
.note-area:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.note-area::placeholder { color: var(--text-3); }
.save-state { font-size: .74rem; color: var(--text-3); }
.save-state.ok { color: var(--good); }

.field-label { display: block; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; font-weight: 700; color: var(--text-3); margin-bottom: 8px; }
.input {
  width: 100%; background: var(--bg-2); border: 1px solid var(--line-strong);
  border-radius: var(--r-sm); color: var(--text); padding: 11px 14px; font-family: var(--font); font-size: .93rem;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

/* Daily goal */
.goal-card {
  background: linear-gradient(135deg, rgba(124,92,255,0.16), rgba(34,211,238,0.08));
  border: 1px solid var(--accent-line); border-radius: var(--r-lg); padding: 24px;
}
.goal-card .ct { color: #C6B6FF; }

/* Quiz */
.quiz-q { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; margin-bottom: 14px; }
.quiz-q > p { font-weight: 600; color: var(--text); margin-bottom: 13px; }
.quiz-opt {
  display: flex; gap: 11px; align-items: flex-start; padding: 10px 13px; margin-bottom: 7px;
  border: 1px solid var(--line); border-radius: var(--r-sm); cursor: pointer; font-size: .91rem;
  color: var(--text-2); transition: .15s; background: var(--bg-2);
}
.quiz-opt:hover { border-color: var(--accent-line); }
.quiz-opt.correct { border-color: var(--good); background: rgba(52,211,153,0.1); color: #A9EFD4; }
.quiz-opt.wrong   { border-color: var(--bad); background: rgba(251,113,133,0.1); color: #FFC2CB; }
.quiz-opt .k { font-family: var(--font-mono); font-size: .76rem; color: var(--text-3); flex: none; }
.quiz-explain { display: none; margin-top: 11px; font-size: .87rem; color: var(--text-2); border-left: 2px solid var(--accent-2); padding-left: 12px; }
.quiz-explain.show { display: block; }

/* Nav between modules */
.mod-nav { display: flex; gap: 14px; margin: 46px 0 20px; }
.mod-nav a {
  flex: 1; padding: 18px 20px; border-radius: var(--r-lg);
  background: var(--surface); border: 1px solid var(--line); transition: .2s;
}
.mod-nav a:hover { border-color: var(--accent-line); transform: translateY(-2px); }
.mod-nav small { display: block; font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); margin-bottom: 4px; }
.mod-nav b { font-family: var(--font-display); font-size: .96rem; }
.mod-nav .nxt { text-align: right; }

/* Stats tiles */
.stat-tile { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 20px 22px; }
.stat-tile b { display: block; font-family: var(--font-display); font-size: 2rem; line-height: 1; margin-bottom: 6px; }
.stat-tile span { font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); }

/* Filter chips */
.chips { display: flex; gap: 9px; flex-wrap: wrap; margin-bottom: 26px; }
.chip {
  padding: 8px 16px; border-radius: 100px; font-size: .82rem; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--text-2); cursor: pointer; transition: .16s;
}
.chip:hover { border-color: var(--accent-line); color: var(--text); }
.chip.active { background: var(--accent-soft); border-color: var(--accent-line); color: #fff; }

/* Accordion */
.acc { border: 1px solid var(--line); border-radius: var(--r); margin-bottom: 10px; overflow: hidden; background: var(--surface); }
.acc-head { padding: 15px 19px; display: flex; justify-content: space-between; gap: 14px; cursor: pointer; font-weight: 600; font-size: .95rem; }
.acc-head:hover { background: var(--surface-2); }
.acc-body { display: none; padding: 0 19px 18px; font-size: .92rem; color: var(--text-2); }
.acc.open .acc-body { display: block; }
.acc-head .caret { transition: .2s; color: var(--accent); }
.acc.open .caret { transform: rotate(90deg); }

/* Toast */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translate(-50%, 130%);
  background: var(--surface-3); border: 1px solid var(--accent-line); color: var(--text);
  padding: 12px 22px; border-radius: 100px; font-size: .88rem; font-weight: 600;
  box-shadow: var(--shadow-lg); z-index: 300; transition: transform .3s cubic-bezier(.2,.9,.3,1.2);
}
.toast.show { transform: translate(-50%, 0); }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 44px 0 60px; margin-top: 70px; color: var(--text-3); font-size: .85rem; }
.footer a:hover { color: var(--text); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ===================== AUTH ===================== */
.auth-page {
  min-height: 100vh; display: grid; place-items: center; padding: 40px 20px;
}
.auth-card {
  width: 100%; max-width: 430px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--r-xl);
  padding: 38px 34px; box-shadow: var(--shadow-lg);
}
.auth-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 26px; }
.auth-card h1 { font-size: 1.65rem; margin-bottom: .3em; }
.auth-sub { font-size: .95rem; color: var(--text-2); margin-bottom: 26px; }
.auth-card .field-label { margin-top: 16px; }
.auth-card .field-label:first-of-type { margin-top: 0; }
.auth-card .btn { margin-top: 22px; }
.auth-msg {
  display: none; margin-top: 16px; padding: 11px 14px; border-radius: var(--r-sm);
  font-size: .88rem; line-height: 1.5;
}
.auth-msg.show { display: block; }
.auth-msg.error { background: rgba(251,113,133,.12); color: #FFC2CB; border: 1px solid rgba(251,113,133,.3); }
.auth-msg.ok { background: rgba(52,211,153,.12); color: #A9EFD4; border: 1px solid rgba(52,211,153,.3); }
.auth-links {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  margin-top: 20px; font-size: .87rem;
}
.auth-links a { color: var(--accent-2); }
.auth-links a:hover { color: #fff; text-decoration: underline; }
.auth-fine { margin-top: 20px; font-size: .82rem; color: var(--text-3); }
.auth-fine a { color: var(--accent-2); }

/* ===================== ACCOUNT CHIP ===================== */
.acct { position: relative; }
.acct-btn {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface-2); border: 1px solid var(--line-strong);
  color: var(--text); border-radius: 100px; padding: 7px 14px 7px 11px;
  font-family: var(--font); font-size: .84rem; font-weight: 600; cursor: pointer;
  transition: .16s; max-width: 180px;
}
.acct-btn:hover { border-color: var(--accent-line); }
.acct-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acct-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-3); flex: none; transition: .3s; }
.acct-dot.s-synced  { background: var(--good); box-shadow: 0 0 8px rgba(52,211,153,.8); }
.acct-dot.s-syncing { background: var(--warn); animation: pulse 1s infinite; }
.acct-dot.s-offline { background: var(--text-3); }
.acct-dot.s-error   { background: var(--bad); }
.acct-dot.s-local   { background: var(--accent-2); }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .35 } }

.acct-menu {
  display: none; position: absolute; top: calc(100% + 10px); right: 0;
  min-width: 230px; background: var(--surface-2); border: 1px solid var(--line-strong);
  border-radius: var(--r); padding: 8px; box-shadow: var(--shadow-lg); z-index: 90;
}
.acct-menu.open { display: block; }
.acct-email { padding: 8px 11px 2px; font-size: .8rem; color: var(--text); word-break: break-all; }
.acct-sync { padding: 0 11px 10px; font-size: .74rem; color: var(--text-3); border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.acct-menu a, .acct-menu button {
  display: block; width: 100%; text-align: left; padding: 9px 11px; border-radius: 8px;
  background: none; border: none; color: var(--text-2); font-family: var(--font);
  font-size: .87rem; cursor: pointer;
}
.acct-menu a:hover, .acct-menu button:hover { background: var(--surface-3); color: var(--text); }

/* ===================== SYNC BAR ===================== */
.sync-bar {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; color: var(--text-3); padding: 5px 12px;
  border-radius: 100px; background: var(--surface-2); border: 1px solid var(--line);
}
.sync-bar::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--text-3); }
.sync-bar.s-synced::before  { background: var(--good); }
.sync-bar.s-syncing::before { background: var(--warn); animation: pulse 1s infinite; }
.sync-bar.s-error::before   { background: var(--bad); }
.sync-bar.s-offline::before { background: var(--text-3); }
.sync-bar.s-local::before   { background: var(--accent-2); }

.fs-on { color: #A9EFD4; }

/* ===================== SALES PAGE ===================== */
.sales-nav { background: rgba(8,9,13,.82); }
.sales-hero { padding: 96px 0 64px; text-align: center; }
.sales-hero h1 {
  font-size: clamp(2.3rem, 5.6vw, 4.1rem); max-width: 17ch; margin: 0 auto .35em;
}
.sales-hero .lede { margin: 0 auto; font-size: clamp(1.02rem, 1.7vw, 1.2rem); max-width: 60ch; }
.sales-cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.trust-row {
  display: flex; gap: 26px; justify-content: center; flex-wrap: wrap;
  margin-top: 40px; font-size: .8rem; color: var(--text-3);
}
.trust-row span { display: flex; align-items: center; gap: 7px; }
.trust-row span::before { content: "✓"; color: var(--good); font-weight: 700; }

.big-num {
  font-family: var(--font-display); font-size: clamp(2.4rem,5vw,3.4rem);
  line-height: 1; background: linear-gradient(100deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.pain-list { max-width: 62ch; margin: 0 auto; }
.pain-list li {
  list-style: none; padding: 14px 0 14px 34px; position: relative;
  border-bottom: 1px solid var(--line); color: var(--text-2); font-size: 1.02rem;
}
.pain-list li::before {
  content: "✕"; position: absolute; left: 4px; top: 14px; color: var(--bad); font-weight: 700;
}
.pain-list { padding: 0; }

.mod-list { display: grid; gap: 2px; }
.mod-row {
  display: flex; align-items: baseline; gap: 14px; padding: 13px 16px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  font-size: .94rem; transition: .16s;
}
.mod-row:hover { border-color: var(--accent-line); transform: translateX(3px); }
.mod-row b { font-family: var(--font-mono); font-size: .74rem; color: var(--pc, var(--accent)); flex: none; }
.mod-row span { color: var(--text-2); }
.mod-row em { margin-left: auto; font-style: normal; font-size: .74rem; color: var(--text-3); flex: none; }

/* Pricing */
.price-card {
  max-width: 520px; margin: 0 auto; text-align: center; padding: 44px 38px;
  background: linear-gradient(165deg, rgba(124,92,255,.14), rgba(34,211,238,.06)), var(--surface);
  border: 1px solid var(--accent-line); border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
}
.price-tag {
  font-family: var(--font-display); font-size: 4.2rem; line-height: 1;
  color: var(--text); margin: 10px 0 6px;
}
.price-note { font-size: .88rem; color: var(--text-3); margin-bottom: 26px; }
.price-includes { text-align: left; margin: 28px 0; display: grid; gap: 11px; }
.price-includes li { list-style: none; display: flex; gap: 11px; font-size: .93rem; color: var(--text-2); }
.price-includes li::before { content: "✓"; color: var(--good); font-weight: 700; flex: none; }

.guarantee {
  margin-top: 26px; padding: 16px 18px; border-radius: var(--r);
  background: var(--surface-2); border: 1px solid var(--line);
  font-size: .87rem; color: var(--text-2);
}

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; }

/* Preview banner */
.preview-bar {
  position: sticky; bottom: 0; z-index: 70;
  background: rgba(12,14,20,.94); backdrop-filter: blur(16px);
  border-top: 1px solid var(--accent-line); padding: 15px 0;
}
.preview-bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.preview-bar p { margin: 0; font-size: .9rem; }

@media (max-width: 620px) {
  .sales-hero { padding: 62px 0 44px; }
  .price-card { padding: 32px 24px; }
  .price-tag { font-size: 3.2rem; }
  .mod-row em { display: none; }
}

/* Print */
@media print {
  .nav, .sidebar, .toc, .mod-nav, .footer, .btn { display: none !important; }
  body { background: #fff; color: #000; }
  .article { max-width: none; }
}

/* Responsive */
@media (max-width: 1080px) {
  .reader-layout { grid-template-columns: 240px minmax(0,1fr); }
  .toc { display: none; }
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .g3, .g4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .reader-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: none; display: none; }
  .sidebar.open { display: block; }
  .nav-links { display: none; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 14px; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; }
  .nav-toggle { display: block; }
}
@media (max-width: 620px) {
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .wrap { padding: 0 18px; }
  .mod-nav { flex-direction: column; }
}