:root {
    --primary: #d32f2f;
    --primary-dark: #8e1b1b;
    --primary-soft: #fdecec;
    --bg: #ffffff;
    --bg-alt: #f8f8fa;
    --text: #1f1f24;
    --text-soft: #62626d;
    --border: #e8e8ee;
    --success: #2e7d32;
    --success-bg: #eaf7eb;
    --warning: #ed6c02;
    --warning-bg: #fff4e8;
    --danger: #c62828;
    --danger-bg: #fdeaea;
    --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.08);
    --radius: 20px;
    --radius-lg: 28px;
    --max-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(100% - 32px, var(--max-width));
    margin: 0 auto;
}

.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--bg-alt);
}

.eyebrow {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 18px;
}

h1,
h2,
h3 {
    margin: 0 0 16px;
    line-height: 1.12;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.7rem);
}

h3 {
    font-size: 1.08rem;
}

p {
    margin: 0 0 16px;
    color: var(--text-soft);
    font-size: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
    border-radius: 999px;
    padding: 14px 22px;
    font-size: 0.98rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn:focus-visible,
.nav-links a:focus-visible,
select:focus-visible,
button:focus-visible,
details:focus-visible {
    outline: 3px solid rgba(211, 47, 47, 0.2);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(211, 47, 47, 0.22);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #fff;
    color: var(--primary-dark);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #fcfcfc;
    transform: translateY(-1px);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    color: var(--primary-dark);
}

.logo-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: grid;
    place-items: center;
    color: white;
    box-shadow: var(--shadow-sm);
}

.logo-mark svg {
    width: 22px;
    height: 22px;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 22px;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-soft);
    font-weight: 600;
}

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

.hero {
    padding: 56px 0 46px;
    background:
        radial-gradient(circle at top right, rgba(211, 47, 47, 0.08), transparent 28%),
        linear-gradient(to bottom, #fff, #fff);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 44px;
    align-items: center;
}

.hero p.lead {
    font-size: 1.08rem;
    max-width: 58ch;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
}

.badge {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 10px 14px;
    font-size: 0.92rem;
    color: var(--text-soft);
    font-weight: 600;
}

.hero-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.hero-illustration {
    min-height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blood-drop {
    width: 180px;
    height: 220px;
    background: linear-gradient(180deg, #ef5350, var(--primary-dark));
    border-radius: 55% 55% 60% 60% / 60% 60% 40% 40%;
    transform: rotate(45deg);
    position: relative;
    box-shadow: 0 26px 42px rgba(211, 47, 47, 0.24);
}

.blood-drop::before {
    content: "❤";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    transform: rotate(-45deg);
    color: white;
    font-size: 52px;
    font-weight: 700;
}

.floating-info {
    position: absolute;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px 16px;
    box-shadow: var(--shadow-md);
    font-weight: 700;
    color: var(--text);
}

.floating-1 {
    top: 28px;
    left: 20px;
}

.floating-2 {
    right: 18px;
    bottom: 36px;
}

.grid-4,
.grid-3,
.grid-2 {
    display: grid;
    gap: 20px;
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: var(--primary-soft);
    color: var(--primary-dark);
    margin-bottom: 14px;
}

.icon svg {
    width: 24px;
    height: 24px;
    display: block;
}

.section-head {
    max-width: 760px;
    margin-bottom: 36px;
}

.checker-wrap {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
    align-items: start;
}

.checker-form,
.result-panel {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    padding: 28px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 700;
    color: var(--text);
    font-size: 0.97rem;
}

.hint {
    font-size: 0.88rem;
    color: var(--text-soft);
    margin-top: -2px;
}

select {
    width: 100%;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 14px;
    padding: 14px;
    font-size: 0.98rem;
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

select:hover {
    border-color: #d7d7e0;
}

select:focus {
    border-color: rgba(211, 47, 47, 0.45);
    box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.08);
    outline: none;
}

.form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 22px;
}

.small-note {
    margin-top: 14px;
    font-size: 0.9rem;
    color: var(--text-soft);
}

.result-panel {
    position: sticky;
    top: 96px;
}

.result-box {
    border-radius: 20px;
    padding: 22px;
    border: 1px solid var(--border);
    min-height: 260px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
}

.result-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-size: 28px;
    font-weight: 800;
}

.result-success {
    background: var(--success-bg);
    border-color: rgba(46, 125, 50, 0.16);
}

.result-success .result-icon {
    background: rgba(46, 125, 50, 0.14);
    color: var(--success);
}

.result-warning {
    background: var(--warning-bg);
    border-color: rgba(237, 108, 2, 0.16);
}

.result-warning .result-icon {
    background: rgba(237, 108, 2, 0.14);
    color: var(--warning);
}

.result-danger {
    background: var(--danger-bg);
    border-color: rgba(198, 40, 40, 0.16);
}

.result-danger .result-icon {
    background: rgba(198, 40, 40, 0.14);
    color: var(--danger);
}

.result-neutral {
    background: #fafafa;
}

.result-title {
    font-size: 1.28rem;
    font-weight: 800;
    color: var(--text);
    margin: 0;
}

.reason-list {
    margin: 8px 0 0;
    padding-left: 18px;
    color: var(--text-soft);
}

.criteria-list,
.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.criteria-list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.criteria-list li:last-child {
    border-bottom: none;
}

.checkmark {
    width: 24px;
    height: 24px;
    flex: 0 0 24px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 800;
    margin-top: 2px;
}

details {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 18px 20px;
    box-shadow: var(--shadow-sm);
}

details+details {
    margin-top: 14px;
}

summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--text);
    list-style: none;
}

summary::-webkit-details-marker {
    display: none;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: white;
    border-radius: 28px;
    padding: 38px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    box-shadow: var(--shadow-md);
}

.cta-box p {
    color: rgba(255, 255, 255, 0.86);
    margin-bottom: 0;
}

footer {
    padding: 28px 0 40px;
    border-top: 1px solid var(--border);
    background: #fff;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-soft);
    font-weight: 600;
}

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

.footer-note {
    font-size: 0.92rem;
    color: var(--text-soft);
}

@media (max-width: 980px) {

    .hero-grid,
    .checker-wrap,
    .grid-4,
    .grid-3,
    .grid-2,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .result-panel {
        position: static;
    }

    .cta-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links {
        display: none;
    }

    .header-inner {
        justify-content: space-between;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 58px 0;
    }

    .hero {
        padding-top: 34px;
    }

    .hero-card,
    .checker-form,
    .result-panel,
    .card {
        padding: 20px;
    }

    .cta-box {
        padding: 28px 22px;
    }

    .floating-info {
        position: static;
        margin-top: 16px;
    }

    .hero-illustration {
        min-height: auto;
        flex-direction: column;
        gap: 14px;
    }

    .btn {
        width: 100%;
    }

    .hero-actions,
    .form-actions {
        flex-direction: column;
    }

    .footer-credit {
        margin-top: 8px;
        font-size: 0.82rem;
        color: #8a8a94;
    }
}