:root {
    /* MD3 Light Theme Defaults */
    --md-sys-color-primary: #D02B21; /* Red-ish typical of ramen maybe, but let's use a generic generic MD3 primary or orange */
    /* Wait, Yamaokaya color is red */
    --md-sys-color-primary: #C62828; 
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #ffdad5;
    --md-sys-color-on-primary-container: #410001;
    --md-sys-color-surface: #fbfdf8;
    --md-sys-color-on-surface: #191c19;
    --md-sys-color-surface-variant: #e0e2ec;
    --md-sys-color-on-surface-variant: #44474e;
    --md-sys-color-error: #ba1a1a;
    
    --bg-color: #fdfdfd;
    --text-color: #1c1b1f;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* MD3 Dark Theme Defaults */
        --md-sys-color-primary: #ffb4ab;
        --md-sys-color-on-primary: #690003;
        --md-sys-color-primary-container: #930006;
        --md-sys-color-on-primary-container: #ffdad5;
        --md-sys-color-surface: #191c19;
        --md-sys-color-on-surface: #e2e3df;
        --md-sys-color-surface-variant: #44474e;
        --md-sys-color-on-surface-variant: #c4c6d0;
        --md-sys-color-error: #ffb4ab;

        --bg-color: #121212;
        --text-color: #e6e1e5;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    overscroll-behavior: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    user-select: none;
}

body {
    font-family: 'Zen Maru Gothic', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    min-height: 100dvh;
    overflow: hidden; /* App like */
    -webkit-font-smoothing: antialiased;
}

.container {
    padding: 20px;
    padding-top: calc(20px + env(safe-area-inset-top));
    padding-bottom: calc(20px + env(safe-area-inset-bottom));
    width: 100%;
    max-width: 500px;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Title */
#title-text {
    position: absolute;
    top: calc(24px + env(safe-area-inset-top));
    left: 50%;
    transform: translateX(-50%);
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    white-space: nowrap;
    z-index: 10;
}

/* Header Icons */
.header-icons {
    position: absolute;
    top: calc(24px + env(safe-area-inset-top));
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 10;
}

.icon-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-primary);
    border: none;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
    transition: background-color 0.2s;
}

.icon-btn:active {
    background-color: var(--md-sys-color-primary-container);
}

.icon-btn .material-icons {
    font-size: 24px;
}

/* Center Content */
.center-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.spinner {
    border: 4px solid var(--md-sys-color-surface-variant);
    border-top: 4px solid var(--md-sys-color-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin-bottom: 12px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-primary {
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    border: none;
    border-radius: 100px; /* Fully rounded */
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Zen Maru Gothic', sans-serif;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.btn-primary:active {
    opacity: 0.8;
}

.koko-box {
    width: 100%;
    border: 2px solid var(--md-sys-color-primary);
    border-radius: 20px;
    padding: 24px 20px;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.koko-box h2 {
    font-size: 28px;
    font-weight: 900;
    margin-bottom: 10px;
}

.koko-caption {
    font-size: 16px;
    color: var(--md-sys-color-primary);
    font-weight: 700;
}

.distance-display {
    font-size: 45px;
    font-weight: 900; /* ExtraBold */
    margin-bottom: 16px;
}

.image-wrapper {
    margin: 16px 0;
    position: relative;
    width: 280px;
    height: 280px;
}

#direction-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* transition: transform 0.1s linear; */ /* Smoothness handled by JS RAf */
    cursor: pointer;
    will-change: transform;
}

.image-hint {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--md-sys-color-on-surface-variant);
    opacity: 0.7;
    white-space: nowrap;
}

/* Footer */
.footer {
    position: absolute;
    bottom: calc(8px + env(safe-area-inset-bottom));
    left: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 12px;
}

.footer-row {
    margin-bottom: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.footer-link {
    color: var(--md-sys-color-primary);
    text-decoration: none;
    font-size: 14px;
}
.copyright-text {
    font-size: 12px;
}

.disclaimer-row {
    margin-top: 8px;
}

.disclaimer {
    font-size: 12px;
}

/* Overlays */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
}

.overlay-content {
    text-align: center;
    padding: 20px;
}

.overlay-content p {
    margin-bottom: 12px;
}

#action-buttons-container {
    width: 100%;
    margin-top: 24px;
}

.btn-large {
    width: 100%;
    height: 56px;
    font-size: 16px;
}

.feedback-text {
    margin-top: 10px;
    color: var(--md-sys-color-error);
    font-size: 14px;
}