/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');


/* ==========================================================================
   2. GLOBAL RESETS & BASE STYLES
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-root);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--color-surface-page);
    color: var(--color-text-default);
    position: relative;
}

/* -------------------- utility classes --------------- */

.layout-container {
    width: var(--layout-width);
    margin: 40px auto;
    padding: 25px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-lg);
    position: relative;
}

body,
.site-header,
.layout-container,
.model-card,
.current-weather,
.footer {
    transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.layout-header {
    display: flex;
    gap: 30px;
    align-items: center;
    font-size: 1.15rem;
    padding: 10px 5px;
}

.layout-heading-group {
    display: flex;
    gap: 15px;
    align-items: center;
}

.layout-tagline {
    color: var(--color-text-brand-muted);
    font-size: 0.98rem;
}

.logo-group {
    display: flex;
    justify-content: center;
    align-items: center;
}

.breezely-logo {
    width: 80px;
}

.breezely-name {
    font-size: 1.75rem;
}

#scroll-top-btn {
    position: fixed;
    opacity: 0;
    visibility: hidden;
    bottom: 50px;
    right: 30px;
    font-size: 3.0rem;
    cursor: pointer;
    background-color: var(--theme-accent);
    color: var(--theme-on-accent);
    border: 2px solid var(--theme-border);
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out, box-shadow 0.15s ease-in-out, transform 0.15s ease-in-out;
    border-radius: 50%;
    z-index: 50;

}

#scroll-top-btn:hover {
    box-shadow: 0px 0px 10px 3px var(--color-sun);
    transform: scale(1.25);
}

#scroll-top-btn:active {
    transform: scale(0.95);
}

#scroll-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.recent-search__message,
.manage-locations__message {
    font-weight: 700;
    text-align: center;
    background-color: var(--color-surface-message);
    padding: 12px;
    border-radius: 8px;
    width: 100%;
    line-height: 1.55;
}


/* Levels of AQI  */

.good-level-aqi {
    background-color: var(--color-status-good) !important;
}

.moderate-level-aqi {
    background-color: var(--color-status-moderate);
    color: var(--color-status-moderate-text);
}

.high-level-aqi {
    background-color: var(--color-status-high);
    color: var(--color-white);
}