:root {
    --primary: #6c4cf1;
    --secondary: #8b5cf6;
    --accent: #a78bfa;
    --background: #f8f7ff;
    --card-bg: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --line: #e7e3ff;
    --surface-strong: #ffffff;
    --surface-soft: #fbfaff;
    --purple-soft: #f0edff;
    --hero-start: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.94);
    --ad-bg: #ffffff;
    --result-bg: linear-gradient(135deg, rgba(108, 76, 241, 0.1), rgba(167, 139, 250, 0.16));
    --success: #16a34a;
    --shadow-sm: 0 10px 28px rgba(31, 41, 55, 0.08);
    --shadow-md: 0 18px 45px rgba(108, 76, 241, 0.16);
    --radius: 16px;
    --gradient: linear-gradient(135deg, #6c4cf1, #8b5cf6);
}

html[data-theme="dark"] {
    color-scheme: dark;
    --background: #0f1020;
    --card-bg: #17182b;
    --text-primary: #f7f7fb;
    --text-secondary: #b7b9c9;
    --line: #2c2a48;
    --surface-strong: #141528;
    --surface-soft: #20213a;
    --purple-soft: #252246;
    --hero-start: #15162a;
    --nav-bg: rgba(20, 21, 40, 0.94);
    --ad-bg: #17182b;
    --result-bg: linear-gradient(135deg, rgba(108, 76, 241, 0.22), rgba(167, 139, 250, 0.14));
    --shadow-sm: 0 12px 30px rgba(0, 0, 0, 0.26);
    --shadow-md: 0 20px 48px rgba(108, 76, 241, 0.22);
}

body {
    color: var(--text-primary);
    background: var(--background);
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--secondary);
}

.site-navbar {
    background: var(--nav-bg);
    box-shadow: 0 8px 24px rgba(31, 41, 55, 0.07);
    backdrop-filter: blur(12px);
}

.navbar-brand,
.nav-link {
    color: var(--text-primary);
}

.nav-link {
    border-radius: 999px;
    font-weight: 600;
    padding-inline: 0.9rem !important;
}

.nav-link:hover,
.nav-link:focus {
    background: var(--purple-soft);
    color: var(--primary);
}

.navbar-toggler {
    border-color: var(--line);
}

html[data-theme="dark"] .navbar-toggler-icon {
    filter: invert(1) grayscale(1);
}

.theme-toggle {
    align-items: center;
    background: var(--purple-soft);
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--primary);
    display: inline-flex;
    height: 42px;
    justify-content: center;
    transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
    width: 42px;
}

.theme-toggle:hover,
.theme-toggle:focus {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.theme-icon-light,
html[data-theme="dark"] .theme-icon-dark {
    display: none;
}

html[data-theme="dark"] .theme-icon-light {
    display: inline-block;
}

.brand-mark {
    width: 42px;
    height: 42px;
    display: inline-grid;
    place-items: center;
    border-radius: 12px;
    background: transparent;
    color: #ffffff;
    overflow: hidden;
    box-shadow: 0 10px 22px rgba(108, 76, 241, 0.25);
}

.brand-wordmark {
    align-items: center;
    display: inline-flex;
    height: 48px;
    max-width: min(300px, 56vw);
}

.brand-wordmark-footer {
    height: 46px;
    max-width: 280px;
}

.brand-mark-sm {
    width: 38px;
    height: 38px;
    border-radius: 10px;
}

.logo-only-brand {
    line-height: 1;
    max-width: min(300px, 56vw);
    padding-bottom: 0;
    padding-top: 0;
}

.brand-logo {
    display: block;
    height: 100%;
    object-fit: cover;
    width: 100%;
}

.brand-logo-full {
    display: block;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
    width: auto;
}

.brand-logo-dark,
html[data-theme="dark"] .brand-logo-light {
    display: none;
}

html[data-theme="dark"] .brand-logo-dark {
    display: block;
}

.hero-section {
    padding: 5.5rem 0 4.5rem;
    background:
        radial-gradient(circle at top right, rgba(167, 139, 250, 0.32), transparent 34%),
        linear-gradient(180deg, var(--hero-start) 0%, var(--background) 100%);
}

.section-pad {
    padding: 4.5rem 0;
}

.ad-band {
    background: var(--surface-strong);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 0;
}

.ad-section {
    padding: 0 0 3rem;
}

.ad-slot {
    align-items: center;
    background: var(--ad-bg);
    border: 1px dashed var(--accent);
    border-radius: 14px;
    color: var(--text-secondary);
    display: flex;
    font-size: 0.82rem;
    font-weight: 700;
    justify-content: center;
    min-height: 92px;
    text-transform: uppercase;
}

.ad-slot-top {
    min-height: 70px;
}

.eyebrow {
    color: var(--primary);
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.lead,
.text-secondary {
    color: var(--text-secondary) !important;
}

.btn {
    border-radius: 12px;
    font-weight: 700;
    padding: 0.72rem 1rem;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.btn-gradient,
.btn-primary {
    --bs-btn-color: #ffffff;
    --bs-btn-bg: var(--primary);
    --bs-btn-border-color: transparent;
    --bs-btn-hover-color: #ffffff;
    --bs-btn-hover-bg: var(--secondary);
    --bs-btn-hover-border-color: transparent;
    background: var(--gradient);
    border: 0;
    box-shadow: 0 12px 24px rgba(108, 76, 241, 0.24);
    color: #ffffff;
}

.btn-gradient:hover,
.btn-gradient:focus,
.btn-primary:hover,
.btn-primary:focus {
    box-shadow: 0 16px 30px rgba(108, 76, 241, 0.32);
    color: #ffffff;
    transform: translateY(-2px);
}

.form-control,
.form-select {
    background-color: var(--surface-strong);
    border-color: var(--line);
    border-radius: 12px;
    color: var(--text-primary);
    min-height: 46px;
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--surface-strong);
    color: var(--text-primary);
    border-color: var(--primary);
    box-shadow: 0 0 0 0.22rem rgba(108, 76, 241, 0.16);
}

.form-label {
    color: var(--text-primary);
    font-weight: 700;
}

.form-text {
    color: var(--text-secondary);
}

.search-box {
    max-width: 360px;
    box-shadow: var(--shadow-sm);
}

.trust-signals {
    color: var(--text-primary);
    font-weight: 700;
}

.trust-signals i,
.feature-list i,
.trust-card i {
    color: var(--success);
}

.hero-panel,
.info-card,
.calculator-card,
.result-card,
.disclaimer-card,
.trust-card {
    background: var(--card-bg);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.hero-panel {
    padding: 1.5rem;
}

.hero-panel-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--purple-soft);
    color: var(--primary);
    font-size: 1.4rem;
}

.metric-card {
    align-items: center;
    background: var(--surface-soft);
    border: 1px solid var(--line);
    border-radius: 14px;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.85rem;
    padding: 1rem;
}

.metric-card span {
    color: var(--text-secondary);
    font-weight: 600;
}

.metric-card strong {
    color: var(--primary);
    font-size: 1.3rem;
}

.card {
    background: var(--card-bg);
    border-color: var(--line);
    border-radius: var(--radius);
    color: var(--text-primary);
}

.tool-card-inner {
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.tool-card-inner:hover {
    border-color: rgba(108, 76, 241, 0.35);
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.tool-icon {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: var(--purple-soft);
    color: var(--primary);
    font-size: 1.55rem;
    margin-bottom: 1.15rem;
}

.bg-soft {
    background: linear-gradient(180deg, var(--hero-start) 0%, var(--background) 100%);
    border-bottom: 1px solid var(--line);
    border-top: 1px solid var(--line);
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    align-items: center;
    display: flex;
    gap: 0.7rem;
    margin-bottom: 0.85rem;
}

.info-card,
.disclaimer-card {
    padding: 1.5rem;
}

.tool-header {
    background:
        radial-gradient(circle at top right, rgba(167, 139, 250, 0.28), transparent 32%),
        linear-gradient(180deg, var(--hero-start) 0%, var(--background) 100%);
    border-bottom: 1px solid var(--line);
    padding: 4rem 0;
}

.trust-card {
    display: grid;
    gap: 0.85rem;
    padding: 1.25rem;
    color: var(--text-primary);
    font-weight: 700;
}

.trust-card div {
    align-items: center;
    display: flex;
    gap: 0.65rem;
}

.calculator-card,
.result-card {
    border: 1px solid var(--line);
}

.tool-result-wrap {
    position: sticky;
    top: 6rem;
}

.result-empty {
    background: var(--card-bg);
    border: 1px dashed var(--accent);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
}

.result-row,
.result-highlight {
    align-items: center;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.result-row {
    border-bottom: 1px solid var(--line);
    padding: 0.9rem 0;
}

.result-row strong {
    color: var(--text-primary);
    font-size: 1.05rem;
}

.result-row:last-child {
    border-bottom: 0;
}

.result-highlight {
    background: var(--result-bg);
    border: 1px solid rgba(108, 76, 241, 0.18);
    border-radius: 14px;
    margin: 0.5rem 0 0.7rem;
    padding: 1rem;
}

.result-highlight span {
    color: var(--text-secondary);
    font-weight: 700;
}

.result-highlight strong {
    color: var(--primary);
    font-size: 1.45rem;
}

.formula {
    background: var(--surface-soft);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--primary);
    font-weight: 800;
    padding: 0.9rem 1rem;
}

.polished-accordion {
    display: grid;
    gap: 0.85rem;
}

.accordion-item {
    background: var(--card-bg);
    border: 1px solid var(--line);
    border-radius: 14px !important;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.accordion-button {
    background: var(--card-bg);
    border-radius: 14px !important;
    color: var(--text-primary);
    font-weight: 800;
}

.accordion-button::after {
    filter: none;
}

html[data-theme="dark"] .accordion-button::after {
    filter: invert(1) grayscale(1);
}

.accordion-body {
    background: var(--card-bg);
    color: var(--text-secondary);
}

.accordion-button:not(.collapsed) {
    background: var(--purple-soft);
    box-shadow: none;
    color: var(--primary);
}

.accordion-button:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.18rem rgba(108, 76, 241, 0.16);
}

.disclaimer-card i {
    color: var(--primary);
    font-size: 1.5rem;
}

.related-tools {
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 1.25rem;
    justify-content: space-between;
    padding: 1.25rem;
}

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: flex-end;
}

.related-links a {
    background: var(--purple-soft);
    border-radius: 999px;
    color: var(--primary);
    font-weight: 800;
    padding: 0.65rem 0.9rem;
}

.related-links a:hover {
    background: var(--gradient);
    color: #ffffff;
}

.legal-hero {
    background: linear-gradient(180deg, var(--hero-start) 0%, var(--background) 100%);
    border-bottom: 1px solid var(--line);
    padding: 4rem 0 3rem;
}

.legal-card h2 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 800;
    margin-top: 1.75rem;
}

.legal-card h2:first-child {
    margin-top: 0;
}

.legal-card p {
    color: var(--text-secondary);
}

.alert {
    border-radius: 14px;
}

html[data-theme="dark"] .alert-danger {
    background: rgba(220, 38, 38, 0.16);
    border-color: rgba(248, 113, 113, 0.38);
    color: #fecaca;
}

html[data-theme="dark"] .alert-warning {
    background: rgba(245, 158, 11, 0.14);
    border-color: rgba(251, 191, 36, 0.34);
    color: #fde68a;
}

.site-footer {
    background: var(--surface-strong);
    border-top: 1px solid var(--line);
}

.footer-links a {
    color: var(--text-secondary);
    font-weight: 700;
}

.footer-links a:hover {
    color: var(--primary);
}

.legal-copy {
    max-width: 820px;
}

.legal-copy h2 {
    font-size: 1.25rem;
    margin-top: 2rem;
}

textarea {
    resize: vertical;
}

@media (max-width: 991.98px) {
    .hero-section {
        padding: 4rem 0 3rem;
    }

    .section-pad {
        padding: 3rem 0;
    }

    .tool-header {
        padding: 3rem 0;
    }

    .tool-result-wrap {
        position: static;
    }

    .related-tools {
        align-items: flex-start;
        flex-direction: column;
    }

    .related-links {
        justify-content: flex-start;
    }
}

@media (max-width: 575.98px) {
    .display-4 {
        font-size: 2.35rem;
    }

    .display-6 {
        font-size: 2rem;
    }

    .search-box {
        max-width: 100%;
    }

    .result-row,
    .result-highlight,
    .metric-card {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.35rem;
    }
}