:root {
    --hys-red: #D93025;
    --hys-field-red: #A51F18;
    --hys-heat: #FF6B00;
    --hys-field-navy: #12313C;
    --hys-clinical-blue: #78C7E7;
    --hys-paper: #F4ECDC;
    --hys-ink: #000000;
    --hys-muted: #737373;
    --highlight-color: var(--hys-heat);
    --highlight-color-rgb: 255, 107, 0;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    min-height: 100vh;
    background-color: var(--hys-paper);
    background-image:
        linear-gradient(rgba(18, 49, 60, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(18, 49, 60, 0.06) 1px, transparent 1px);
    background-size: 72px 72px, 72px 72px;
    color: var(--hys-field-navy);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
    letter-spacing: 0;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    transform: translateY(-160%);
    background: var(--hys-paper);
    color: var(--hys-field-navy);
    border: 2px solid var(--hys-red);
    border-radius: 4px;
    padding: 8px 12px;
    font-weight: 800;
}

.skip-link:focus {
    transform: translateY(0);
}

.brand-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 0;
    text-align: initial;
    background: rgba(244, 236, 220, 0.98);
    border-bottom: 3px solid var(--hys-red);
}

.brand-page-anchor {
    scroll-margin-top: 88px;
}

.brand-page-anchor:focus {
    outline: none;
}

.brand-nav-inner {
    width: min(1200px, calc(100% - 32px));
    min-height: 64px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: var(--hys-field-navy);
    font-size: 1.35rem;
    font-weight: 900;
    text-decoration: none;
    white-space: nowrap;
}

.brand-mark-red {
    color: var(--hys-red);
}

.brand-mark-divider {
    margin: 0 8px;
    color: var(--hys-muted);
}

.brand-nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.brand-nav-link {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    padding: 8px 10px;
    border-radius: 4px;
    color: var(--hys-field-navy);
    font-size: 0.95rem;
    font-weight: 800;
    text-decoration: none;
    transition-property: background-color, color, transform;
    transition-duration: 160ms;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.brand-nav-link:hover,
.brand-nav-link:focus {
    background: var(--hys-red);
    color: var(--hys-paper);
}

.brand-nav-link:active {
    transform: scale(0.96);
}

.highlight-text,
.highlight-text-red,
.highlight-orange,
.text-brand-orange,
.text-orange-500,
.text-orange-400 {
    color: var(--hys-heat);
}

.highlight-bg,
.bg-brand-orange,
.bg-orange-500,
.bg-orange-600 {
    background-color: var(--hys-heat);
}

.border-brand-orange,
.border-orange-500 {
    border-color: var(--hys-heat);
}

.rounded-lg,
.rounded-xl,
.rounded-2xl {
    border-radius: 6px;
}

canvas#heat-index-chart {
    width: 100% !important;
    height: 100% !important;
    max-height: 300px;
}

.chart-container {
    position: relative;
    width: 100%;
    min-height: 250px;
}

.animated-item {
    opacity: 0;
    transform: translateY(30px);
    transition-property: opacity, transform;
    transition-duration: 0.8s;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.animated-item.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.animated-item:nth-child(1) { transition-delay: 0.1s; }
.animated-item:nth-child(2) { transition-delay: 0.2s; }
.animated-item:nth-child(3) { transition-delay: 0.3s; }
.animated-item:nth-child(4) { transition-delay: 0.4s; }
.animated-item:nth-child(5) { transition-delay: 0.5s; }

.bento-item {
    transition-property: transform, box-shadow, background-color, border-color;
    transition-duration: 180ms;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 6px;
}

.bento-item:hover {
    background-color: rgba(255, 107, 0, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(255, 107, 0, 0.1), 0 4px 6px -2px rgba(255, 107, 0, 0.05);
}

.loading,
.weather-info {
    min-height: 150px;
}

#weather-icon {
    display: inline-block;
    width: 64px;
    height: 64px;
}

.alert.alert-comfort { background-color: rgba(74, 222, 128, 0.2); color: rgb(22, 101, 52); }
.alert.alert-caution { background-color: rgba(250, 204, 21, 0.2); color: rgb(133, 77, 14); }
.alert.alert-extreme-caution { background-color: rgba(249, 115, 22, 0.2); color: rgb(154, 52, 18); }
.alert.alert-danger { background-color: rgba(239, 68, 68, 0.2); color: rgb(153, 27, 27); }
.alert.alert-extreme-danger { background-color: rgba(220, 38, 38, 0.2); color: rgb(127, 29, 29); }

.checklist-item {
    transition-property: transform, background-color, border-color;
    transition-duration: 180ms;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.checklist-item:hover {
    transform: translateX(3px);
}

.checklist-item input[type="checkbox"] {
    cursor: pointer;
    appearance: none;
    background-color: transparent;
    border: 2px solid #555;
    border-radius: 4px;
    display: inline-block;
    position: relative;
    transition-property: background-color, border-color;
    transition-duration: 180ms;
    transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

.checklist-item input[type="checkbox"]:checked {
    background-color: var(--hys-heat);
    border-color: var(--hys-heat);
}

.checklist-item input[type="checkbox"]:checked::after {
    content: '✓';
    font-size: 16px;
    color: black;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    line-height: 1;
}

.checklist-item.completed {
    border-left-color: var(--hys-heat);
    background-color: rgba(255, 107, 0, 0.1);
}

.checklist-item.completed label > span:first-child {
    text-decoration: line-through;
    opacity: 0.7;
}

button,
a {
    touch-action: manipulation;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--hys-clinical-blue);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .animated-item,
    .fade-in {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}

@media (max-width: 768px) {
    .brand-nav-inner {
        width: min(100% - 24px, 1200px);
        min-height: auto;
        padding: 10px 0;
        display: block;
    }

    .brand-mark {
        font-size: 1.2rem;
    }

    .brand-nav-links {
        justify-content: flex-start;
        margin-top: 8px;
    }

    .brand-nav-link {
        min-height: 38px;
        padding: 7px 9px;
        font-size: 0.9rem;
    }
}