/* ============================================================================
   NoiseRemover.ai design system
   ========================================================================== */
:root {
    --nr-primary: #4f46e5;
    --nr-primary-dark: #4338ca;
    --nr-primary-soft: #eef2ff;
    --nr-ink: #0f172a;
    --nr-body: #344256;
    --nr-muted: #64748b;
    --nr-line: #e7ecf3;
    --nr-bg-soft: #f6f8fc;
    --nr-radius: 0.9rem;
    --nr-radius-sm: 0.6rem;
    --nr-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .05);
    --nr-shadow: 0 4px 20px rgba(15, 23, 42, .07);
    --nr-shadow-lg: 0 18px 50px -16px rgba(15, 23, 42, .22);

    /* Map onto Bootstrap so its components inherit the palette */
    --bs-primary: var(--nr-primary);
    --bs-primary-rgb: 79, 70, 229;
    --bs-link-color: var(--nr-primary);
    --bs-link-hover-color: var(--nr-primary-dark);
    --bs-body-color: var(--nr-body);
    --bs-border-color: var(--nr-line);
    --bs-body-font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: var(--bs-body-font-family);
    color: var(--nr-body);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    background: #fff;
}
main { flex: 1; }

h1, h2, h3, h4, h5, h6, .navbar-brand {
    font-family: var(--bs-body-font-family);
    color: var(--nr-ink);
    font-weight: 700;
    letter-spacing: -0.018em;
}
.display-4, .display-5, .display-6 { letter-spacing: -0.03em; font-weight: 800; }
.lead { color: var(--nr-muted); font-weight: 400; }
a { text-decoration: none; }
a:hover { text-decoration: none; }
.text-muted { color: var(--nr-muted) !important; }
hr { border-color: var(--nr-line); opacity: 1; }

/* ---------- Buttons ---------- */
.btn { font-weight: 600; border-radius: 0.6rem; padding: 0.55rem 1.15rem; transition: transform .12s ease, box-shadow .12s ease, background .12s ease; }
.btn-lg { padding: 0.8rem 1.6rem; }
.btn-sm { padding: 0.35rem 0.8rem; border-radius: 0.5rem; }
.btn-primary { background: var(--nr-primary); border-color: var(--nr-primary); box-shadow: 0 6px 16px -6px rgba(79, 70, 229, .6); }
.btn-primary:hover, .btn-primary:focus { background: var(--nr-primary-dark); border-color: var(--nr-primary-dark); transform: translateY(-1px); }
.btn-outline-primary { color: var(--nr-primary); border-color: #cdd3f7; }
.btn-outline-primary:hover { background: var(--nr-primary); border-color: var(--nr-primary); }
.btn-outline-secondary { color: var(--nr-body); border-color: var(--nr-line); }
.btn-outline-secondary:hover { background: var(--nr-ink); border-color: var(--nr-ink); color: #fff; }
.btn-success { background: #16a34a; border-color: #16a34a; box-shadow: 0 6px 16px -6px rgba(22, 163, 74, .55); }
.btn-success:hover { background: #15803d; border-color: #15803d; transform: translateY(-1px); }

/* ---------- Navbar ---------- */
.navbar {
    background: rgba(255, 255, 255, .9) !important;
    backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--nr-line);
    padding-top: .7rem; padding-bottom: .7rem;
    position: sticky; top: 0; z-index: 1030;
}
.navbar-brand { font-weight: 800; font-size: 1.25rem; display: inline-flex; align-items: center; gap: .55rem; color: var(--nr-ink); }
.brand-logo { border-radius: 8px; display: block; }
.navbar .nav-link { color: var(--nr-body); font-weight: 500; padding: .4rem .85rem; border-radius: .5rem; }
.navbar .nav-link:hover { color: var(--nr-primary); }
.navbar .nav-link.active { color: var(--nr-primary); font-weight: 600; }
.dropdown-menu { max-height: 320px; overflow-y: auto; border-color: var(--nr-line); border-radius: .65rem; box-shadow: var(--nr-shadow); }

/* ---------- Sections ---------- */
.section-soft { background: var(--nr-bg-soft); }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; font-weight: 700; color: var(--nr-primary); }
.hero-gradient { background: radial-gradient(1200px 420px at 50% -140px, #e7e9fd 0%, rgba(231,233,253,0) 70%), #fff; }

/* ---------- Cards ---------- */
.card { border-color: var(--nr-line); border-radius: var(--nr-radius); }
.feature-card {
    background: #fff;
    border: 1px solid var(--nr-line);
    border-radius: var(--nr-radius);
    padding: 1.4rem;
    height: 100%;
    box-shadow: var(--nr-shadow-sm);
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
a .feature-card:hover, .feature-card.hoverable:hover {
    transform: translateY(-3px);
    box-shadow: var(--nr-shadow);
    border-color: #d4d8f7;
}
.feature-emoji { font-size: 1.7rem; margin-bottom: .5rem; line-height: 1; }

/* ---------- Forms ---------- */
.form-control, .form-select { border-color: var(--nr-line); border-radius: .6rem; padding: .6rem .85rem; }
.form-control:focus, .form-select:focus { border-color: var(--nr-primary); box-shadow: 0 0 0 .2rem rgba(79, 70, 229, .15); }
.input-group-text { border-color: var(--nr-line); background: var(--nr-bg-soft); }

/* ---------- Accordion (FAQ) ---------- */
.accordion { --bs-accordion-border-color: var(--nr-line); --bs-accordion-border-radius: var(--nr-radius-sm); }
.accordion-item { border-color: var(--nr-line); margin-bottom: .6rem; border-radius: var(--nr-radius-sm) !important; overflow: hidden; }
.accordion-button { font-weight: 600; color: var(--nr-ink); }
.accordion-button:not(.collapsed) { background: var(--nr-primary-soft); color: var(--nr-primary-dark); box-shadow: none; }
.accordion-button:focus { box-shadow: none; border-color: var(--nr-line); }

/* ---------- Tables ---------- */
.table { --bs-table-border-color: var(--nr-line); color: var(--nr-body); }
.table thead th { color: var(--nr-muted); font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .03em; border-bottom-width: 1px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { --bs-breadcrumb-divider: '›'; }
.breadcrumb-item, .breadcrumb-item a { color: var(--nr-muted); }
.breadcrumb-item.active { color: var(--nr-body); }

/* ---------- Badges ---------- */
.badge { font-weight: 600; }
.badge.popular-badge { background: var(--nr-primary-soft); color: var(--nr-primary-dark); letter-spacing: .02em; }

/* ---------- Footer ---------- */
.site-footer { background: var(--nr-ink); color: #cbd5e1; padding: 3rem 0 1.5rem; }
.site-footer a { color: #cbd5e1; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: none; }
.site-footer h6 { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: .9rem; }
.site-footer .footer-brand { color: #fff; font-weight: 800; font-size: 1.15rem; display: inline-flex; align-items: center; gap: .5rem; }
.site-footer .footer-link { display: block; padding: .2rem 0; font-size: .92rem; }
.site-footer hr { border-color: rgba(255, 255, 255, .12); }

/* ============================================================================
   Pricing / checkout / steps
   ========================================================================== */
.pricing-card { border: 1px solid var(--nr-line); border-radius: var(--nr-radius); box-shadow: none; transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease; }
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--nr-shadow); border-color: #d4d8f7; }
.pricing-card.featured { border: 1.5px solid var(--nr-primary); box-shadow: var(--nr-shadow); }

.howto-step { display: flex; gap: .9rem; align-items: flex-start; margin-bottom: 1.1rem; }
.howto-num {
    flex: 0 0 auto; width: 34px; height: 34px; border-radius: 50%;
    background: var(--nr-primary-soft); color: var(--nr-primary-dark);
    display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: .95rem;
    border: 1px solid #d4d8f7;
}
.tool-prose { font-size: 1.04rem; line-height: 1.7; color: var(--nr-body); }
.tool-prose h2 { margin-top: 2rem; margin-bottom: .9rem; }
.tool-prose ul li { margin-bottom: .35rem; }

#stripe-payment-element, #card-element { border: 1px solid var(--nr-line); padding: .75rem; border-radius: .6rem; }
.alert { border-radius: var(--nr-radius-sm); }
.alert ul { margin: 0; padding-left: 1rem; }

.hidden { display: none !important; }
.spinner-border-sm { width: 1rem; height: 1rem; }

@media (max-width: 768px) {
    .display-4 { font-size: 2rem; }
    .display-5 { font-size: 1.9rem; }
}