/* ═══════════════════════════════════════════════════════════════════════════
   BillKori — base theme.

   The colours are the logo's. The primary family (--bh-primary … --bh-primary-on-dark) is ALSO
   emitted at runtime by _Layout from ColorHelper, so changing one hex re-themes everything; the
   values below are exactly what it produces for #12934F, so the page is right even before that
   <style> block parses.

   Token NAMES (--bh-*, --radius-*, --shadow-*) are BizHub's on purpose: hisab.css was written
   against them, and keeping them means the ported book styles need no renaming.

   Contrast rules (WCAG AA):
     • white text on --bh-primary (3.95:1) only on BOLD buttons/badges — never small body text;
       green TEXT on white uses --bh-primary-ink (5.2:1).
     • --bh-accent (the logo orange) always carries DARK ink text — white on it is ~2:1.
     • the orange never means "warning"; warnings use --bh-warning-ink on a pale amber.
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    --bh-primary: #12934F;
    --bh-primary-rgb: 18, 147, 79;
    --bh-primary-hover: #0E6E3B;
    --bh-primary-ink: #0F7D43;
    --bh-primary-light: #EAF5EF;
    --bh-primary-wash: #F4FAF7;
    --bh-primary-on-dark: #7DC49E;

    --bh-accent: #F5A524;
    --bh-accent-rgb: 245, 165, 36;

    --bh-ink: #1A1F1C;
    --bh-ink-rgb: 26, 31, 28;
    --bh-ink-deep: #0F1A14;
    --bh-dark: var(--bh-ink);

    --bh-muted: #5B6660;
    --bh-text-2: #3F4A44;

    --bh-paper: #FAFBFA;
    --bh-surface: #FFFFFF;
    --bh-surface-alt: #F1F4F2;
    --bh-soft: #F6F8F7;
    --bh-tint: #F4FAF7;
    --bh-line: #E5E9E6;
    --bh-border: #E5E9E6;
    --bh-border-strong: #CBD3CE;

    --bh-success: #0F7D43;
    --bh-warning: #D97706;
    --bh-warning-ink: #B45309;
    --bh-danger: #DC2626;
    --bh-info: #0E7490;

    --space-1: .25rem; --space-2: .5rem; --space-3: .75rem; --space-4: 1rem;
    --space-5: 1.5rem; --space-6: 2rem; --space-7: 3rem; --space-8: 4.5rem;

    --radius-sm: .375rem; --radius-md: .5rem; --radius-lg: .75rem; --radius-xl: 1rem; --radius-pill: 2rem;

    --shadow-xs: 0 1px 2px rgba(15, 26, 20, .05);
    --shadow-sm: 0 1px 3px rgba(15, 26, 20, .07), 0 1px 2px rgba(15, 26, 20, .04);
    --shadow-md: 0 6px 16px rgba(15, 26, 20, .09), 0 2px 4px rgba(15, 26, 20, .04);
    --shadow-lg: 0 14px 28px rgba(15, 26, 20, .11), 0 4px 8px rgba(15, 26, 20, .05);

    --ease-out: cubic-bezier(.16, 1, .3, 1);
    --t-fast: 150ms; --t-base: 220ms; --t-slow: 320ms;

    /* Bootstrap hooks */
    --bs-body-font-family: "IBM Plex Sans", "Hind Siliguri", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --bs-body-color: var(--bh-ink);
    --bs-body-bg: var(--bh-surface);
    --bs-primary: var(--bh-primary);
    --bs-primary-rgb: var(--bh-primary-rgb);
    --bs-border-color: var(--bh-border);
    --bs-secondary-color: var(--bh-muted);
}

/* ── Base ──────────────────────────────────────────────────────────────── */
html[lang="bn"] body { font-family: "Hind Siliguri", "IBM Plex Sans", system-ui, sans-serif; }
body { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
.bk-body { display: flex; flex-direction: column; min-height: 100vh; }
.bk-main { flex: 1 0 auto; }

h1, h2, h3, h4, h5, h6 { font-family: "Sora", "Anek Bangla", system-ui, sans-serif; color: var(--bh-ink); letter-spacing: -.01em; }
html[lang="bn"] h1, html[lang="bn"] h2, html[lang="bn"] h3,
html[lang="bn"] h4, html[lang="bn"] h5, html[lang="bn"] h6 { font-family: "Anek Bangla", "Sora", system-ui, sans-serif; letter-spacing: 0; }

a { color: var(--bh-primary-ink); }
a:hover { color: var(--bh-primary-hover); }
.text-primary { color: var(--bh-primary-ink) !important; }
.text-muted { color: var(--bh-muted) !important; }
.bg-primary { background-color: var(--bh-primary) !important; }

:focus-visible { outline: 3px solid rgba(var(--bh-primary-rgb), .45); outline-offset: 2px; }

.section { padding: 1.5rem 0 3rem; }
.section--tight { padding: 1rem 0 2rem; }

/* ── Buttons & form controls ───────────────────────────────────────────── */
.btn { font-weight: 600; border-radius: var(--radius-md); }

.btn-primary {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--bh-primary);
    --bs-btn-border-color: var(--bh-primary);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--bh-primary-hover);
    --bs-btn-hover-border-color: var(--bh-primary-hover);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--bh-primary-hover);
    --bs-btn-active-border-color: var(--bh-primary-hover);
    --bs-btn-disabled-color: #fff;
    --bs-btn-disabled-bg: var(--bh-primary);
    --bs-btn-disabled-border-color: var(--bh-primary);
    --bs-btn-focus-shadow-rgb: var(--bh-primary-rgb);
    font-weight: 700;
}

.btn-outline-primary {
    --bs-btn-color: var(--bh-primary-ink);
    --bs-btn-border-color: var(--bh-primary);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--bh-primary);
    --bs-btn-hover-border-color: var(--bh-primary);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--bh-primary-hover);
    --bs-btn-active-border-color: var(--bh-primary-hover);
    --bs-btn-focus-shadow-rgb: var(--bh-primary-rgb);
}

.btn-outline-secondary {
    --bs-btn-color: var(--bh-text-2);
    --bs-btn-border-color: var(--bh-border-strong);
    --bs-btn-hover-color: var(--bh-ink);
    --bs-btn-hover-bg: var(--bh-surface-alt);
    --bs-btn-hover-border-color: var(--bh-border-strong);
    --bs-btn-active-color: var(--bh-ink);
    --bs-btn-active-bg: var(--bh-surface-alt);
    --bs-btn-active-border-color: var(--bh-border-strong);
}

/* The logo orange: dark text only. */
.btn-accent {
    --bs-btn-color: var(--bh-ink);
    --bs-btn-bg: var(--bh-accent);
    --bs-btn-border-color: var(--bh-accent);
    --bs-btn-hover-color: var(--bh-ink);
    --bs-btn-hover-bg: #E39612;
    --bs-btn-hover-border-color: #E39612;
    --bs-btn-active-color: var(--bh-ink);
    --bs-btn-active-bg: #E39612;
    --bs-btn-active-border-color: #E39612;
    --bs-btn-focus-shadow-rgb: var(--bh-accent-rgb);
    font-weight: 700;
}

.form-control, .form-select { border-color: var(--bh-border-strong); border-radius: var(--radius-md); }
.form-control:focus, .form-select:focus { border-color: var(--bh-primary); box-shadow: 0 0 0 .2rem rgba(var(--bh-primary-rgb), .2); }
.form-check-input:checked { background-color: var(--bh-primary); border-color: var(--bh-primary); }
.form-check-input:focus { border-color: var(--bh-primary); box-shadow: 0 0 0 .2rem rgba(var(--bh-primary-rgb), .2); }
.form-text { color: var(--bh-muted); }

.dropdown-menu { --bs-dropdown-link-active-bg: var(--bh-primary); border-color: var(--bh-line); box-shadow: var(--shadow-md); }
.dropdown-item { display: flex; align-items: center; }
.dropdown-item.active, .dropdown-item:active { background-color: var(--bh-primary); color: #fff; }

/* ── Public header ─────────────────────────────────────────────────────── */
.bk-header { background: #fff; border-bottom: 1px solid var(--bh-line); position: sticky; top: 0; z-index: 1030; }
.bk-header__in { display: flex; align-items: center; justify-content: space-between; gap: .75rem; min-height: 62px; }
.bk-header__right { display: flex; align-items: center; gap: .5rem; flex-wrap: nowrap; }
.bk-brand { display: inline-flex; align-items: center; line-height: 0; }
.bk-brand__logo, .bk-brand__mark { height: auto; }

/* ── App bar (over the book) ───────────────────────────────────────────── */
.bk-appbar { background: #fff; border-bottom: 1px solid var(--bh-line); position: sticky; top: 0; z-index: 1030; }
.bk-appbar__in { display: flex; align-items: center; justify-content: space-between; gap: .75rem; min-height: 54px; padding-inline: 1rem; }
.bk-appbar__brand { display: flex; align-items: center; gap: .6rem; min-width: 0; text-decoration: none; color: var(--bh-ink); font-weight: 600; }
.bk-appbar__brand:hover { color: var(--bh-ink); }
.bk-appbar__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 46vw; }
.bk-appbar__right { display: flex; align-items: center; gap: .5rem; }

/* ── Footer (dark: the dark logo's ground is baked in, so this must be exactly #0F1A14) ── */
.bk-footer { background: var(--bh-ink-deep); color: #C9D3CD; padding: 2.5rem 0 1.5rem; margin-top: 3rem; }
.bk-footer__in { display: flex; flex-direction: column; align-items: flex-start; gap: 1.25rem; }
.bk-footer__logo { height: auto; max-width: 260px; }
.bk-footer__links { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin: 0; }
.bk-footer a { color: var(--bh-primary-on-dark); text-decoration: none; }
.bk-footer a:hover { text-decoration: underline; color: #fff; }
.bk-footer__copy { margin: 0; font-size: .875rem; color: #9DAAA2; }

/* ── Landing (P1 stand-in) ─────────────────────────────────────────────── */
.bk-hero { background: var(--bh-ink-deep); color: #fff; text-align: center; padding: 2.5rem 0 3.25rem; }
.bk-hero__logo { width: min(560px, 88vw); height: auto; }
.bk-hero__lead { font-size: 1.25rem; max-width: 36rem; margin: 1.25rem auto .5rem; color: #E6EEE9; }
.bk-hero__sub { max-width: 36rem; margin: 0 auto; color: #B7C4BC; }
.bk-hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; margin-top: 1.5rem; }

.bk-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.bk-feature { background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-lg); padding: 1.25rem; }
.bk-feature i { font-size: 1.6rem; color: var(--bh-primary-ink); }

/* ── Sign-in / sign-up / errors ────────────────────────────────────────── */
.bk-auth { padding: 2rem 0 3rem; background: var(--bh-paper); }
.bk-auth__wrap { max-width: 480px; margin-inline: auto; }
.bk-auth__head { text-align: center; margin-bottom: 1.25rem; }
.bk-auth__mark { height: auto; margin-bottom: .5rem; }
.bk-auth__title { font-size: 1.6rem; margin: 0; }
.bk-auth__sub { color: var(--bh-muted); margin: .25rem 0 0; }
.bk-auth__card { background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-xl); padding: 1.5rem; box-shadow: var(--shadow-sm); }
@media (min-width: 576px) { .bk-auth__card { padding: 2rem 2.25rem; } }
.bk-auth__alt { text-align: center; margin: 1rem 0 0; font-size: .95rem; }
.bk-error__code { font-family: "Sora", sans-serif; font-size: 4.5rem; font-weight: 700; line-height: 1; color: var(--bh-primary); }

/* Honeypot: off-screen, not display:none (some bots skip display:none fields). */
.bk-hp { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ── Welcome card, and the book's frame when it has no rail yet ────────── */
.bk-welcome { background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-xl); padding: 1.5rem; box-shadow: var(--shadow-xs); }
.hisab--bare { display: block; }

.language-switcher .btn { white-space: nowrap; }

/* ── Paper ─────────────────────────────────────────────────────────────── */
@media print {
    .bk-header, .bk-appbar, .bk-footer, .aic-toasts, .d-print-none, form[data-submit-spinner] { display: none !important; }
    .bk-body { background: #fff; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   P3 — landing, legal, contact, settings, first-run card
   ═══════════════════════════════════════════════════════════════════════════ */

/* Header navigation (wide screens) */
.bk-nav { align-items: center; gap: 1.25rem; margin-inline: auto 1rem; }
.bk-nav a { color: var(--bh-text-2); text-decoration: none; font-weight: 500; }
.bk-nav a:hover { color: var(--bh-primary-ink); }

/* Landing: hero additions */
.bk-hero { padding: 2.5rem 0 3.5rem; }
.bk-hero__logo { width: min(480px, 80vw); height: auto; }
.bk-hero__h1 { font-size: clamp(1.6rem, 4.5vw, 2.5rem); line-height: 1.25; color: #fff; max-width: 40rem; margin: 1.25rem auto 0; }
.bk-hero__chips { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; list-style: none; padding: 0; margin: 1.5rem 0 0; }
.bk-hero__chips li { border: 1px solid rgba(255, 255, 255, .22); color: #D8E4DD; border-radius: var(--radius-pill); padding: .25rem .85rem; font-size: .9rem; }

/* Landing: sections */
.bk-section { padding: 3rem 0; }
.bk-section--tint { background: var(--bh-primary-wash); }
/* iSoft blog strip: when the feed returns nothing the container stays empty — hide the band too. */
.bk-blog:has(#isoft-blog:empty) { display: none; }
.bk-h2 { font-size: clamp(1.4rem, 3.2vw, 1.9rem); margin: 0 0 .5rem; text-align: center; }
.bk-lead { text-align: center; color: var(--bh-muted); max-width: 40rem; margin: 0 auto 2rem; }
.bk-features { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.bk-steps { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); counter-reset: step; list-style: none; padding: 0; margin: 0; }
.bk-step { position: relative; counter-increment: step; background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-lg); padding: 1.1rem 1.25rem 1.1rem 4rem; }
.bk-step::before { content: counter(step); position: absolute; left: 1.1rem; top: 1.05rem; width: 2.2rem; height: 2.2rem; border-radius: 50%; background: var(--bh-primary); color: #fff; font-weight: 700; display: grid; place-items: center; }
html[lang="bn"] .bk-step::before { content: counter(step, bengali); }

.bk-trust { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.bk-trust__item { display: flex; gap: .9rem; align-items: flex-start; }
.bk-trust__item > i { flex: none; font-size: 1.4rem; color: var(--bh-primary-ink); background: var(--bh-primary-light); border-radius: var(--radius-md); padding: .55rem; }

.bk-faq { max-width: 52rem; margin-inline: auto; --bs-accordion-active-bg: var(--bh-primary-light); --bs-accordion-active-color: var(--bh-primary-ink); --bs-accordion-btn-focus-box-shadow: 0 0 0 .2rem rgba(var(--bh-primary-rgb), .2); --bs-accordion-border-color: var(--bh-line); }
.bk-faq .accordion-button { font-weight: 600; }
.bk-faq .accordion-header { margin: 0; font-size: 1rem; }

.bk-cta { background: var(--bh-ink-deep); color: #fff; text-align: center; padding: 3rem 0; }
.bk-cta .bk-h2 { color: #fff; }
.bk-cta p { color: #C9D3CD; margin-bottom: 1.25rem; }

/* Footer (three columns) */
.bk-footer__grid { display: grid; gap: 1.75rem; grid-template-columns: 1.4fr 1fr 1fr; }
@media (max-width: 767.98px) { .bk-footer__grid { grid-template-columns: 1fr; } }
.bk-footer__h { font-family: inherit; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: #9DAAA2; margin: 0 0 .6rem; }
.bk-footer__about { color: #B7C4BC; margin: .75rem 0 0; max-width: 22rem; }
.bk-footer ul { margin: 0; padding: 0; }
.bk-footer ul li { margin-bottom: .4rem; }
.bk-footer__copy { margin: 1.75rem 0 0; padding-top: 1rem; border-top: 1px solid rgba(255, 255, 255, .1); }

/* Legal pages */
.bk-legal { padding: 2.5rem 0 3.5rem; background: var(--bh-paper); }
.bk-legal__wrap { max-width: 46rem; margin-inline: auto; background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-xl); padding: 1.75rem 1.5rem; }
@media (min-width: 768px) { .bk-legal__wrap { padding: 2.5rem 3rem; } }
.bk-legal h1 { font-size: 1.75rem; margin: 0 0 .25rem; }
.bk-legal__meta { color: var(--bh-muted); margin-bottom: 1.5rem; }
.bk-legal h2 { font-size: 1.15rem; margin: 1.75rem 0 .5rem; }
.bk-legal p, .bk-legal li { line-height: 1.75; }

/* Contact */
.bk-contact { display: grid; gap: 1.25rem; grid-template-columns: 1fr; max-width: 860px; margin-inline: auto; }
@media (min-width: 768px) { .bk-contact { grid-template-columns: 1.4fr 1fr; align-items: start; } }
.bk-contact__side { background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-xl); padding: 1.5rem; }

/* Settings */
.bk-card { background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-lg); padding: 1.25rem; margin-bottom: 1rem; }
.bk-card__title { font-size: 1.05rem; margin: 0 0 .25rem; }
.bk-card__sub { color: var(--bh-muted); font-size: .92rem; margin: 0 0 1rem; }
.bk-logo-preview { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.bk-logo-preview img { width: 88px; height: 88px; object-fit: contain; border: 1px solid var(--bh-line); border-radius: var(--radius-md); background: #fff; padding: 6px; }
.bk-danger { border-color: #F1C4C4; background: #FFF9F9; }
.bk-danger .bk-card__title { color: #9C1919; }

/* First-run card on Today */
.bk-start { background: var(--bh-primary-wash); border: 1px solid rgba(var(--bh-primary-rgb), .25); border-radius: var(--radius-lg); padding: 1.25rem; margin-bottom: 1rem; }
.bk-start__title { font-size: 1.15rem; margin: 0 0 .25rem; }
.bk-start__lead { color: var(--bh-muted); margin: 0 0 1rem; }
.bk-start__steps { list-style: none; counter-reset: s; display: grid; gap: .6rem; padding: 0; margin: 0; }
.bk-start__steps li { counter-increment: s; }
.bk-start__steps a { position: relative; display: flex; flex-direction: column; gap: .15rem; background: #fff; border: 1px solid var(--bh-line); border-radius: var(--radius-md); padding: .75rem .9rem .75rem 3rem; text-decoration: none; color: var(--bh-ink); }
.bk-start__steps a::before { content: counter(s); position: absolute; left: .8rem; top: .8rem; width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--bh-primary); color: #fff; font-weight: 700; font-size: .9rem; display: grid; place-items: center; }
html[lang="bn"] .bk-start__steps a::before { content: counter(s, bengali); }
.bk-start__steps a:hover { border-color: var(--bh-primary); box-shadow: var(--shadow-sm); }
.bk-start__steps span { color: var(--bh-muted); font-size: .9rem; }
.bk-start__foot { margin: 1rem 0 0; font-size: .92rem; color: var(--bh-muted); }
/* ═══════════════════════════════════════════════════════════════════════════
   P4 — notice bar, Admin panel
   ═══════════════════════════════════════════════════════════════════════════ */

/* Site-wide notice bar. Warning is a pale yellow with brown ink — never the brand orange. */
.bk-notice { font-size: .93rem; }
.bk-notice[hidden] { display: none !important; }
.bk-notice__in { display: flex; align-items: center; gap: .6rem; padding: .5rem 1rem; }
.bk-notice__text { flex: 1 1 auto; }
.bk-notice__link { font-weight: 600; white-space: nowrap; }
.bk-notice__close { background: none; border: 0; padding: .25rem; color: inherit; opacity: .7; line-height: 1; }
.bk-notice__close:hover { opacity: 1; }
.bk-notice--info { background: var(--bh-primary-light); color: var(--bh-ink); border-bottom: 1px solid rgba(var(--bh-primary-rgb), .25); }
.bk-notice--warning { background: #FEF3C7; color: #78350F; border-bottom: 1px solid #FCD34D; }
.bk-notice--warning .bk-notice__link { color: #78350F; text-decoration: underline; }

/* Admin: contact messages, definition lists */
.bk-pre { white-space: pre-wrap; word-break: break-word; margin: 0; }
.bk-msg { background: #fff; border: 1px solid var(--bh-line); border-left: 4px solid var(--bh-line); border-radius: var(--radius-md); padding: .9rem 1rem; margin-bottom: .75rem; }
.bk-msg--unread { border-left-color: var(--bh-primary); background: var(--bh-primary-wash); }
.bk-msg__head { display: flex; flex-wrap: wrap; gap: .25rem .75rem; align-items: baseline; margin-bottom: .4rem; }
.bk-msg__who { font-weight: 700; }
.bk-msg__meta { color: var(--bh-muted); font-size: .85rem; }
.bk-msg__actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .6rem; }

.bk-dl { display: grid; grid-template-columns: 11rem 1fr; gap: .35rem 1rem; margin: 0; }
.bk-dl dt { color: var(--bh-muted); font-weight: 500; }
.bk-dl dd { margin: 0; }
@media (max-width: 575.98px) { .bk-dl { grid-template-columns: 1fr; } .bk-dl dt { margin-top: .4rem; } }