/* Asosiy ranglar va barcha elementlar uchun umumiy sozlamalar. */
:root {
    --background: #f6f8fb;
    --ink: #172c49;
    --muted: #5f6e82;
    --blue: #245ad6;
    --line: #dfe6ee;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
.skip-link { position: absolute; top: -100px; left: 20px; z-index: 10; padding: 12px 18px; border-radius: 8px; color: white; background: var(--ink); }
.skip-link:focus { top: 12px; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--background); color: var(--ink); font-family: "Segoe UI", Arial, sans-serif; line-height: 1.6; }
.container { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
a { color: inherit; }
.site-header { min-height: 104px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; text-decoration: none; font-size: 29px; font-weight: 750; letter-spacing: -1px; }
.brand-icon { width: 35px; height: 35px; margin-right: 10px; display: grid; place-items: center; background: var(--ink); color: white; border-radius: 9px; font-size: 28px; line-height: 1; }
.brand-dot { color: var(--blue); }
.header-note { font-size: 13px; color: var(--muted); }
.site-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.site-nav a { text-decoration: none; font-size: 13px; font-weight: 600; color: var(--muted); padding-block: 10px; }
.site-nav a:hover { color: var(--blue); }

/* Kirish qismi: chapda matn, o‘ngda hisoblash namunasi. */
.hero { display: grid; grid-template-columns: 1.15fr 1fr; gap: 84px; align-items: center; padding: 82px 0 76px; }
.hero { position: relative; isolation: isolate; }
.hero::before { content: ""; position: absolute; z-index: -1; pointer-events: none; inset: 20px -20px 20px 48%; background-image: linear-gradient(#dfe7f180 1px, transparent 1px), linear-gradient(90deg, #dfe7f180 1px, transparent 1px); background-size: 28px 28px; mask-image: radial-gradient(ellipse, black 20%, transparent 70%); }
.hero > *, .about-section > *, .calculator-layout > * { min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 9px; font-size: 11px; font-weight: 700; letter-spacing: 1.6px; color: var(--blue); margin: 0 0 22px; }
.eyebrow span { width: 7px; height: 7px; background: var(--blue); border-radius: 50%; }
h1 { font-size: clamp(40px, 4.8vw, 64px); line-height: 1.12; letter-spacing: -2.6px; margin: 0 0 24px; font-weight: 730; }
h1 span { color: var(--blue); }
.intro { color: var(--muted); font-size: 17px; max-width: 465px; margin: 0 0 30px; line-height: 1.8; }
.button { display: inline-flex; align-items: center; gap: 22px; background: var(--blue); color: white; padding: 15px 22px; border-radius: 9px; text-decoration: none; font-size: 14px; font-weight: 600; transition: background .2s, transform .2s; }
.button:hover { background: #1948b4; transform: translateY(-2px); }
a:focus-visible { outline: 3px solid #779df3; outline-offset: 5px; }
.hero-note { color: var(--muted); font-size: 12px; margin-top: 15px; }
.preview { background: white; padding: 30px; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 20px 60px -30px #213c6c45; position: relative; }
/* Namuna ortidagi xira yorug‘lik matn va tugmalarga xalaqit bermaydi. */
.preview::before { content: ""; position: absolute; inset: -32px; z-index: -1; pointer-events: none; border-radius: 50%; background: radial-gradient(ellipse, #a7c3fa66 0%, #c8dafa40 45%, transparent 72%); }
.preview-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.preview h2 { font-size: 18px; margin: 0; letter-spacing: -.4px; }
.sample-badge { font-size: 11px; font-weight: 600; background: #edf2fc; color: #41649d; padding: 4px 10px; border-radius: 5px; }
.preview-subtitle { color: var(--muted); font-size: 12px; margin: 5px 0 24px; }
.sample-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sample-inputs > div { background: #f6f8fb; border: 1px solid #e8edf3; border-radius: 9px; padding: 13px 14px; }
.sample-inputs span { display: block; font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.sample-inputs strong { font-size: 18px; font-weight: 650; }
small { font-size: 11px; font-weight: 400; }
.totals { margin: 24px 0; }
.totals > div { display: flex; justify-content: space-between; gap: 12px; margin: 12px 0; font-size: 13px; }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 650; font-variant-numeric: tabular-nums; }
.profit { background: #edf7f2; border: 1px solid #d7ecdf; padding: 17px 19px; border-radius: 10px; display: flex; align-items: center; justify-content: space-between; color: #24664a; }
.profit span { display: block; font-size: 12px; }
.profit strong { display: block; font-size: 30px; letter-spacing: -.8px; line-height: 1.4; }
.profit .profit-icon { font-size: 30px; }
.preview-note { font-size: 11px; color: var(--muted); margin: 15px 0 0; }
.sample-action { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: 12px; margin-top: 20px; padding: 16px 0 0; background: transparent; border: 0; border-top: 1px solid var(--line); color: var(--blue); font: inherit; font-size: 12px; font-weight: 600; cursor: pointer; text-align: left; }
.sample-action:hover { color: #173e94; }
.sample-action:focus-visible { outline: 3px solid #779df3; outline-offset: 5px; border-radius: 3px; }

/* Ma’lumot kiritish kataklari. */
.calculator-section { padding: 32px; margin-bottom: 48px; scroll-margin-top: 24px; background: #edf3fc; border: 1px solid #dce6f5; border-radius: 22px; }
.calculator-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; align-items: start; }
.calculator-layout .fields-grid { grid-template-columns: 1fr; gap: 18px; }
.calculator-layout .form-actions { align-items: flex-start; flex-direction: column; gap: 12px; }
.result-panel { background: white; padding: 28px; border: 1px solid var(--line); border-radius: 16px; min-width: 0; }
.result-panel h3 { margin: 0; font-size: 20px; }
#result-empty { color: var(--muted); font-size: 14px; }
.result-panel dd { overflow-wrap: anywhere; text-align: right; }
.result-panel .profit strong { font-size: clamp(20px, 2.5vw, 30px); overflow-wrap: anywhere; }
.profit.is-loss { background: #fff1f1; border-color: #f0d2d2; color: #a52e35; }
.profit.is-neutral { background: #f0f3f7; border-color: var(--line); color: var(--ink); }
.field input[aria-invalid="true"] { border-color: #b52c36; }
.field .field-error { color: #a52e35; }
.button:focus-visible { outline: 3px solid #779df3; outline-offset: 5px; }
.section-heading .eyebrow { margin-bottom: 10px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 3vw, 30px); line-height: 1.3; letter-spacing: -.7px; }
.section-heading > p:last-child { color: var(--muted); font-size: 14px; margin: 10px 0 24px; }
.calculator-form { background: white; border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.fields-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.field label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 9px; }
.field input { display: block; width: 100%; min-height: 50px; border: 1px solid #cbd5e2; border-radius: 8px; padding: 12px 14px; font: inherit; font-size: 16px; color: var(--ink); background: #fbfcfe; }
.field input::placeholder { color: #6b7789; font-size: 14px; }
.field input:focus-visible { outline: 3px solid #d9e5ff; border-color: var(--blue); }
.field p { color: var(--muted); font-size: 12px; margin: 9px 0 0; }
.form-actions { display: flex; align-items: center; gap: 22px; margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.form-actions .button { font-family: inherit; border: none; flex-shrink: 0; }
.action-buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.form-actions .button { cursor: pointer; min-height: 48px; }
.form-actions .button-secondary { background: #edf2f9; color: var(--ink); border: 1px solid var(--line); }
.form-actions .button-secondary:hover { background: #e0e8f4; }
.button:disabled { background: #e7ecf4; color: #5f6e82; cursor: not-allowed; transform: none; }
.form-actions p { margin: 0; color: var(--muted); font-size: 12px; max-width: 440px; }

/* Foydalanish tartibi va sahifaning pastki qismi. */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 38px; padding: 32px 0 43px; border-top: 1px solid var(--line); }
.steps article { display: flex; gap: 16px; }
.step-number { font-size: 12px; color: var(--blue); font-weight: 650; padding-top: 3px; }
.steps h2 { font-size: 15px; margin: 0 0 6px; font-weight: 650; }
.steps p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.7; }
.site-footer { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding-block: 23px; font-size: 11px; color: var(--muted); }

/* Loyiha va muallif haqidagi bo‘limlar. */
.info-section { border-top: 1px solid var(--line); padding: 48px 0; scroll-margin-top: 24px; }
.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.info-card { background: white; border: 1px solid var(--line); border-radius: 14px; padding: 26px; }
.card-kicker { font-size: 10px; letter-spacing: 1.3px; font-weight: 700; color: var(--blue); }
.info-card h3 { font-size: 18px; line-height: 1.4; margin: 12px 0; }
.info-card p, .formula-list { font-size: 14px; color: var(--muted); line-height: 1.8; margin: 0; }
.formula-list { padding-left: 20px; }
.formula-list li + li { margin-top: 7px; }
.scope-note { font-size: 13px; line-height: 1.8; color: var(--muted); border-left: 3px solid #9ab6ed; padding: 10px 18px; margin: 22px 0 0; }
.scope-note strong { color: var(--ink); }
.about-section { display: grid; grid-template-columns: .85fr 1.4fr; gap: 60px; padding: 44px; margin: 0 0 48px; border: 1px solid var(--line); border-radius: 18px; background: #edf2f9; scroll-margin-top: 24px; }
.initials { display: grid; place-content: center; grid-auto-flow: column; width: 76px; height: 76px; background: var(--ink); color: white; border-radius: 18px; font-size: 27px; font-weight: 700; letter-spacing: -1px; margin-bottom: 22px; }
.initials span { color: #94b4ff; }
.about-identity h2 { font-size: 27px; line-height: 1.3; letter-spacing: -.7px; margin: 0; }
.about-direction { font-size: 13px; color: var(--muted); margin: 12px 0 0; }
.about-copy p { font-size: 14px; color: var(--muted); line-height: 1.9; margin: 0 0 16px; }
.about-copy strong { font-weight: 600; color: var(--ink); }
.about-copy .project-credit { font-size: 12px; margin: 20px 0 0; }
.contact-block { margin-top: 24px; padding-top: 22px; border-top: 1px solid #d4dfed; }
.contact-block h3 { font-size: 14px; margin: 0 0 12px; }
.contact-block .button { flex-wrap: wrap; overflow-wrap: anywhere; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 24px 0 0; }
.skill-tags li { background: white; border: 1px solid #d8e2f0; border-radius: 6px; padding: 6px 12px; font-size: 12px; font-weight: 600; color: #38577e; }
.faq-section { padding: 0 0 48px; }
.faq-list { border: 1px solid var(--line); border-radius: 14px; background: white; overflow: hidden; }
.faq-list details + details { border-top: 1px solid var(--line); }
.faq-list summary { padding: 20px 24px; font-size: 15px; font-weight: 600; cursor: pointer; }
.faq-list summary::marker { color: var(--blue); }
.faq-list summary:hover { background: #f2f6fc; }
.faq-list summary:focus-visible { outline: 3px solid #779df3; outline-offset: -4px; }
.faq-list details[open] summary { color: var(--blue); }
.faq-list details p { margin: 0; padding: 0 24px 22px; color: var(--muted); font-size: 14px; line-height: 1.85; max-width: 850px; }
.site-footer a { text-decoration: none; padding-block: 5px; }
.site-footer a:hover { color: var(--blue); }
#result-title:focus { outline: 2px solid #779df3; outline-offset: 6px; border-radius: 3px; }

/* Kichik ekranlarda bloklar bir-birining tagiga tushadi. */
@media (max-width: 900px) {
    .about-section { gap: 30px; padding: 30px; }
    .hero { gap: 34px; padding-block: 60px; }
    .preview { padding: 22px; }
    h1 { font-size: 46px; }
    .profit strong { font-size: 25px; }
}
@media (min-width: 681px) and (max-width: 780px) {
    .hero { grid-template-columns: 1fr; }
    .hero-copy { max-width: 560px; }
    .preview { max-width: 540px; width: 100%; }
}
@media (max-width: 680px) {
    .calculator-section { padding: 22px 16px; border-radius: 16px; }
    .preview::before { inset: -18px; }
    .site-header { flex-wrap: wrap; gap: 8px; padding-block: 18px; }
    .site-nav { width: 100%; gap: 6px 20px; }
    .site-nav a { font-size: 12px; }
    .project-grid, .about-section { grid-template-columns: 1fr; }
    .about-section { padding: 24px; gap: 26px; }
    .info-card { padding: 22px; }
    .calculator-layout { grid-template-columns: 1fr; }
    .container { width: calc(100% - 40px); }
    .site-header { min-height: 80px; }
    .header-note { font-size: 10px; max-width: 100px; text-align: right; }
    .hero { grid-template-columns: 1fr; gap: 35px; padding-block: 44px; }
    h1 { font-size: 44px; letter-spacing: -1.8px; max-width: 430px; }
    .intro { font-size: 16px; }
    .steps { grid-template-columns: 1fr; gap: 24px; }
    .fields-grid { grid-template-columns: 1fr; gap: 20px; }
    .calculator-form { padding: 22px; }
    .form-actions { flex-direction: column; align-items: stretch; gap: 13px; }
    .form-actions .button { justify-content: center; }
    .action-buttons { width: 100%; }
    .action-buttons .button { flex: 1; }
    .site-footer { flex-direction: column; gap: 5px; }
}
@media (max-width: 380px) {
    .calculator-section { padding: 20px 12px; }
    .container { width: calc(100% - 28px); }
    h1 { font-size: 36px; }
    .sample-inputs { grid-template-columns: 1fr; }
    .preview, .calculator-form, .result-panel, .about-section { padding: 18px; }
    .faq-list summary { padding: 18px; }
    .faq-list details p { padding-inline: 18px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .button { transition: none; }
    .button:hover { transform: none; }
}