/* =====================
   Reset & Base Styles
   ===================== */

:root {
    --font-family-base: Arial, "Helvetica Neue", Helvetica, sans-serif;
    --font-family-article: 'Arial', sans-serif;
    --color-text: #333;
    --color-text-article: #222;
    --color-link: #111;
    --color-bg: #f3f3f3;
    --color-bg-white: #fff;
    --color-border: #ddd;
    --color-overlay: rgba(0, 0, 0, 0.7);
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-hover: rgba(0, 0, 0, 0.15);
    --color-notification-bg: #333;
    --color-notification-text: #fff;
    --color-action-bg: rgba(255, 255, 255, 0.2);
    --color-action-border: rgba(255, 255, 255, 0.3);
    --color-action-bg-hover: rgba(255, 255, 255, 0.3);
    --color-action-border-hover: rgba(255, 255, 255, 0.5);

    --radius: 0.75rem;
    --radius-action: 0.5rem;
    --shadow: 0 0.25rem 0.375rem var(--color-shadow);
    --shadow-hover: 0 0.5rem 1.5625rem var(--color-shadow-hover);

    --header-img-height: 7rem;
    --gallery-gap: 2rem;
    --gallery-gap-mobile: 1rem;
    --gallery-gap-xs: 0.5rem;
    --gallery-img-height: 12.5rem;
    --gallery-img-height-mobile: 12.5rem;
    --gallery-img-height-xs: 12.5rem;

    --notification-padding: 1rem 1.5rem;
    --notification-radius: 0.5rem;
    --notification-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.3);

    --action-padding: 0.8rem;
    --action-padding-mobile: 0.6rem;
    --action-gap: 1rem;
    --action-gap-mobile: 0.5rem;

    --max-width: 61.25rem;
    --section-padding: 1rem 0;
    --header-padding: 2rem 0;
    --footer-padding: 1rem 0;
    --footer-border: 1px solid var(--color-border);

    --font-size-base: 1rem;
    --font-size-article: 1.1rem;
    --font-size-size: 1.2rem;
    --line-height-article: 1.7;
}

html {
    box-sizing: border-box;
}
*, *:before, *:after {
    box-sizing: inherit;
}

/* CSS */
body {
    font-family: var(--font-family-base);
    color: var(--color-text);
    background: var(--color-bg);
    font-size: var(--font-size-base);
    min-height: 100vh;
}

a, a:visited {
    text-decoration: none;
    color: var(--color-link);
    outline: none;
    transition: color 0.2s;
}
a:focus {
    outline: 2px solid var(--color-link);
    outline-offset: 2px;
}
a:hover, a:active {
    color: #0056b3;
    text-decoration: underline;
}

header {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--header-padding);
    text-align: center;
}

header img {
    height: var(--header-img-height);
}

/* =====================
   Section
   ===================== */
section {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--section-padding);
}

/* =====================
   Article
   ===================== */
article {
    font-family: var(--font-family-article);
    line-height: var(--line-height-article);
    font-size: var(--font-size-article);
    color: var(--color-text-article);
}

article a {
    transition: color 0.2s, text-decoration 0.2s;
}

article a:focus {
    outline: 2px solid var(--color-link);
    outline-offset: 2px;
}

article a:hover {
    text-decoration: underline;
    color: #0056b3;
}

article p {
    margin-bottom: 1rem;
}

article p.text {
    padding: 1.1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
}

article p.text:hover {
    padding: 1.1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

article p svg {
    cursor: pointer;
    padding: 0 0.3rem;
}

article ul, article ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

article img {
    max-width: 100%;
    height: auto;
}

article .page-break {
    page-break-before: always;
}

/* =====================
   Image Gallery Styles
   ===================== */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(18.75rem, 1fr));
    gap: var(--gallery-gap);
    margin-top: 2rem;
}

.image-item {
    position: relative;
    background: var(--color-bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-item:hover {
    transform: translateY(-0.3125rem);
    box-shadow: var(--shadow-hover);
}

.image-item img {
    width: 100%;
    height: var(--gallery-img-height);
    object-fit: cover;
    display: block;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-item:hover .image-overlay {
    opacity: 1;
}

.image-info {
    text-align: center;
    color: white;
}

.image-size {
    display: block;
    font-size: var(--font-size-size);
    font-weight: bold;
    margin-bottom: 1rem;
}

.image-actions {
    display: flex;
    gap: var(--action-gap);
    justify-content: center;
}

.image-actions button {
    background: var(--color-action-bg);
    border: 2px solid var(--color-action-border);
    color: white;
    padding: var(--action-padding);
    border-radius: var(--radius-action);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-actions button:hover {
    background: var(--color-action-bg-hover);
    border-color: var(--color-action-border-hover);
    transform: scale(1.1);
}

.image-actions button svg {
    width: 1rem;
    height: 1rem;
}

/* =====================
   Notification Styles
   ===================== */
.notification {
    position: fixed;
    top: 1.25rem;
    right: 1.25rem;
    background: var(--color-notification-bg);
    color: var(--color-notification-text);
    padding: var(--notification-padding);
    border-radius: var(--notification-radius);
    box-shadow: var(--notification-shadow);
    z-index: 1000;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

/* =====================
   Footer
   ===================== */
footer {
    width: 90%;
    max-width: var(--max-width);
    margin: 0 auto;
    border-top: var(--footer-border);
    padding: var(--footer-padding);
    text-align: center;
}

/* =====================
   Responsive Design
   ===================== */
@media (max-width: 48rem) {
    .image-gallery {
        grid-template-columns: repeat(auto-fit, minmax(15.625rem, 1fr));
        gap: var(--gallery-gap-mobile);
    }

    .image-actions {
        gap: var(--action-gap-mobile);
    }

    .image-actions button {
        padding: var(--action-padding-mobile);
    }
}

@media (max-width: 30rem) {
    .image-gallery {
        grid-template-columns: 1fr;
    }

    .notification {
        right: 0.625rem;
        left: 0.625rem;
        transform: translateY(-100%);
    }

    .notification.show {
        transform: translateY(0);
    }
}

@media print {
    .no-print {
        display: none;
    }
}