/*
Theme Name: Twenty Twenty-Five Child
Theme URI: https://seongwon.net
Description: Custom child theme for seongwon.net - Personal tech blog with hero banner, hamburger menu, and search functionality
Author: Seongwon
Author URI: https://seongwon.net
Template: twentytwentyfive
Version: 1.1.1
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: twentytwentyfive-child
*/

/* ==========================================================================
   CSS Variables - Design Tokens
   ========================================================================== */
:root {
    --child-color-primary: #333333;
    --child-color-secondary: #666666;
    --child-color-accent: #0073aa;
    --child-color-background: #ffffff;
    --child-color-surface: #f8f9fa;
    --child-color-border: #e5e5e5;
    --child-color-overlay: rgba(0, 0, 0, 0.5);
    --child-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --child-transition-fast: 0.2s ease;
    --child-transition-normal: 0.3s ease;
    --child-transition-slow: 0.5s ease;
    --child-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --child-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --child-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --child-header-height: 60px;
    --child-sidebar-width: 320px;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
    font-family: var(--child-font-sans);
    background-color: var(--child-color-background);
    color: var(--child-color-primary);
}

/* ==========================================================================
   Hero Banner Section
   ========================================================================== */
.hero-banner {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    background-color: var(--child-color-surface);
}

.hero-banner__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-banner__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.4) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.hero-banner__title {
    color: #ffffff;
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 0.5rem 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-banner__tagline {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    font-weight: 400;
    text-align: center;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Hero Banner - Post Page Styles
   ========================================================================== */
.hero-banner--post,
.hero-banner--archive {
    height: 400px;
}

.hero-banner__overlay--post {
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(0, 0, 0, 0.6) 100%
    );
    justify-content: flex-end;
    padding: 3rem 2rem;
}

/* Category Label */
.hero-banner__category {
    display: inline-block;
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.375rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    transition: background-color var(--child-transition-fast);
}

.hero-banner__category:hover {
    background-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
}

.hero-banner__category--label {
    background-color: transparent;
    padding: 0;
    cursor: default;
}

.hero-banner__category--label:hover {
    background-color: transparent;
}

/* Post Title on Banner */
.hero-banner__title--post {
    font-size: 2.5rem;
    line-height: 1.2;
    max-width: 900px;
    margin: 0 auto 1rem;
}

/* Post Meta (Author & Date) */
.hero-banner__meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9375rem;
}

.hero-banner__author {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--child-transition-fast);
}

.hero-banner__author:hover {
    color: #ffffff;
    text-decoration: underline;
}

.hero-banner__separator {
    color: rgba(255, 255, 255, 0.5);
}

.hero-banner__date {
    color: rgba(255, 255, 255, 0.85);
}

/* Responsive Hero Banner */
@media (max-width: 768px) {
    .hero-banner {
        height: 200px;
    }

    .hero-banner--post,
    .hero-banner--archive {
        height: 320px;
    }

    .hero-banner__title {
        font-size: 1.75rem;
    }

    .hero-banner__title--post {
        font-size: 1.75rem;
    }

    .hero-banner__tagline {
        font-size: 1rem;
    }

    .hero-banner__overlay--post {
        padding: 2rem 1.5rem;
    }

    .hero-banner__category {
        font-size: 0.6875rem;
        padding: 0.25rem 0.5rem;
    }

    .hero-banner__meta {
        font-size: 0.8125rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .hero-banner {
        height: 180px;
    }

    .hero-banner--post,
    .hero-banner--archive {
        height: 280px;
    }

    .hero-banner__title {
        font-size: 1.5rem;
    }

    .hero-banner__title--post {
        font-size: 1.375rem;
    }

    .hero-banner__tagline {
        font-size: 0.875rem;
    }

    .hero-banner__overlay--post {
        padding: 1.5rem 1rem;
    }
}

/* ==========================================================================
   Custom Header Navigation Bar
   ========================================================================== */
.custom-header-nav {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: var(--child-header-height);
    background-color: var(--child-color-background);
    border-bottom: 1px solid var(--child-color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1000;
    box-shadow: var(--child-shadow-sm);
}

.custom-header-nav__left,
.custom-header-nav__center,
.custom-header-nav__right {
    display: flex;
    align-items: center;
}

.custom-header-nav__center {
    flex: 1;
    justify-content: center;
}

.custom-header-nav__site-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--child-color-primary);
    text-decoration: none;
    transition: color var(--child-transition-fast);
}

.custom-header-nav__site-title:hover {
    color: var(--child-color-accent);
}

/* ==========================================================================
   Hamburger Menu Button
   ========================================================================== */
.hamburger-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: opacity var(--child-transition-fast);
}

.hamburger-btn:hover {
    opacity: 0.7;
}

.hamburger-btn__line {
    width: 24px;
    height: 2px;
    background-color: var(--child-color-primary);
    margin: 3px 0;
    transition: all var(--child-transition-normal);
    border-radius: 1px;
}

/* Hamburger Animation when active */
.hamburger-btn.is-active .hamburger-btn__line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.is-active .hamburger-btn__line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.is-active .hamburger-btn__line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ==========================================================================
   Search Button
   ========================================================================== */
.search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: opacity var(--child-transition-fast);
}

.search-btn:hover {
    opacity: 0.7;
}

.search-btn__icon {
    width: 20px;
    height: 20px;
    stroke: var(--child-color-primary);
    stroke-width: 2;
    fill: none;
}

/* ==========================================================================
   Sidebar Menu (Slide-in)
   ========================================================================== */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--child-color-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--child-transition-normal), visibility var(--child-transition-normal);
    z-index: 1001;
}

.sidebar-overlay.is-active {
    opacity: 1;
    visibility: visible;
}

.sidebar-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--child-sidebar-width);
    max-width: 85vw;
    height: 100vh;
    background-color: var(--child-color-background);
    transform: translateX(-100%);
    transition: transform var(--child-transition-normal);
    z-index: 1002;
    overflow-y: auto;
    box-shadow: var(--child-shadow-lg);
}

.sidebar-menu.is-active {
    transform: translateX(0);
}

.sidebar-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--child-color-border);
}

.sidebar-menu__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--child-color-primary);
    margin: 0;
}

.sidebar-menu__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--child-color-secondary);
    transition: color var(--child-transition-fast);
}

.sidebar-menu__close:hover {
    color: var(--child-color-primary);
}

.sidebar-menu__content {
    padding: 1rem 0;
}

/* ==========================================================================
   Category List in Sidebar
   ========================================================================== */
.category-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.category-list__item {
    border-bottom: 1px solid var(--child-color-border);
}

.category-list__item:last-child {
    border-bottom: none;
}

.category-list__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.5rem;
    color: var(--child-color-primary);
    text-decoration: none;
    transition: background-color var(--child-transition-fast);
}

.category-list__link:hover {
    background-color: var(--child-color-surface);
}

.category-list__name {
    font-size: 0.9375rem;
    font-weight: 500;
}

.category-list__count {
    font-size: 0.8125rem;
    color: var(--child-color-secondary);
    background-color: var(--child-color-surface);
    padding: 0.125rem 0.5rem;
    border-radius: 10px;
}

/* Nested Categories (Children) */
.category-list--nested {
    padding-left: 0;
    background-color: var(--child-color-surface);
}

.category-list--nested .category-list__link {
    padding-left: 2.5rem;
}

.category-list--nested .category-list__link::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: var(--child-color-border);
    border-radius: 50%;
    margin-right: 0.75rem;
}

/* Deep nested categories */
.category-list--nested .category-list--nested .category-list__link {
    padding-left: 3.5rem;
}

/* Category Toggle Button */
.category-list__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    margin-left: 0.5rem;
    transition: transform var(--child-transition-fast);
}

.category-list__toggle svg {
    width: 16px;
    height: 16px;
    stroke: var(--child-color-secondary);
    stroke-width: 2;
    fill: none;
}

.category-list__toggle.is-expanded {
    transform: rotate(180deg);
}

/* ==========================================================================
   Search Modal
   ========================================================================== */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.98);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--child-transition-normal), visibility var(--child-transition-normal);
    z-index: 1003;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 20vh;
}

.search-modal.is-active {
    opacity: 1;
    visibility: visible;
}

.search-modal__close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 2rem;
    color: var(--child-color-secondary);
    transition: color var(--child-transition-fast);
}

.search-modal__close:hover {
    color: var(--child-color-primary);
}

.search-modal__form {
    width: 100%;
    max-width: 600px;
    padding: 0 1.5rem;
}

.search-modal__input-wrapper {
    position: relative;
}

.search-modal__input {
    width: 100%;
    padding: 1.25rem 1.5rem;
    font-size: 1.25rem;
    border: 2px solid var(--child-color-border);
    border-radius: 8px;
    background-color: var(--child-color-background);
    color: var(--child-color-primary);
    outline: none;
    transition: border-color var(--child-transition-fast), box-shadow var(--child-transition-fast);
}

.search-modal__input:focus {
    border-color: var(--child-color-accent);
    box-shadow: 0 0 0 3px rgba(0, 115, 170, 0.1);
}

.search-modal__input::placeholder {
    color: var(--child-color-secondary);
}

.search-modal__submit {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background-color: var(--child-color-accent);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color var(--child-transition-fast);
}

.search-modal__submit:hover {
    background-color: #005a87;
}

.search-modal__submit svg {
    width: 20px;
    height: 20px;
    stroke: #ffffff;
    stroke-width: 2;
    fill: none;
}

.search-modal__hint {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--child-color-secondary);
}

/* ==========================================================================
   Body Scroll Lock
   ========================================================================== */
body.no-scroll {
    overflow: hidden;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 768px) {
    .custom-header-nav {
        padding: 0 1rem;
    }

    .sidebar-menu {
        width: 280px;
    }

    .search-modal__input {
        font-size: 1rem;
        padding: 1rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .custom-header-nav__site-title {
        font-size: 1rem;
    }

    .sidebar-menu {
        width: 100%;
        max-width: 100%;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .custom-header-nav,
    .sidebar-menu,
    .sidebar-overlay,
    .search-modal,
    .hero-banner {
        display: none !important;
    }
}

/* ==========================================================================
   Hide TwentyTwentyFive Default Header Elements
   (Replaced by custom header nav and hero banner)
   ========================================================================== */

/* Hide the default theme header block (site title + navigation) */
body:not(.wp-admin) header.wp-block-template-part,
body:not(.wp-admin) .wp-block-template-part[data-type="core/template-part"] > header,
body:not(.wp-admin) .wp-site-blocks > header.wp-block-template-part {
    display: none !important;
}

/* Alternative selectors for FSE header patterns */
body:not(.wp-admin) .wp-block-group.alignfull > .wp-block-group .wp-block-site-title,
body:not(.wp-admin) .wp-block-group.alignfull > .wp-block-group .wp-block-navigation {
    /* Keep visible only if needed, otherwise hide */
}

/* Hide duplicate post title on single post pages (shown in banner) */
.single-post main .wp-block-post-title,
.single-post .entry-title {
    display: none !important;
}

/* Hide duplicate post meta (author/date) shown in post content area */
.single-post main .wp-block-post-author,
.single-post main .wp-block-post-date:first-of-type {
    display: none !important;
}

/* Hide duplicate featured image on single post (shown in banner) */
.single-post main .wp-block-post-featured-image {
    display: none !important;
}

/* Hide the hidden-written-by pattern on single post (specific selector for the "Written by" pattern) */
.single-post main > .wp-block-group > .wp-block-group.has-small-font-size:has(.wp-block-post-author-name) {
    display: none !important;
}

/* Ensure post content is always visible */
.single-post main .wp-block-post-content {
    display: block !important;
}

/* Reduce top margin on main content since hero banner provides visual separation */
body:not(.wp-admin) main.wp-block-group {
    margin-top: 0 !important;
}

/* Remove excessive padding from main content area after hero banner */
body:not(.wp-admin) main.wp-block-group > .wp-block-group.alignfull:first-child {
    padding-top: var(--wp--preset--spacing--40) !important;
}

/* ==========================================================================
   Single Post Content Styles
   ========================================================================== */

/* Ensure post content container is visible and properly styled */
.single-post main .wp-block-group.alignfull {
    display: block !important;
}

/* Post content typography improvements */
.single-post .wp-block-post-content {
    display: block !important;
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* Ensure all content blocks inside post-content are visible */
.single-post .wp-block-post-content > * {
    display: revert;
}

/* Post content paragraphs */
.single-post .wp-block-post-content p {
    margin-bottom: 1.5em;
}

/* Post content headings */
.single-post .wp-block-post-content h2,
.single-post .wp-block-post-content h3,
.single-post .wp-block-post-content h4 {
    margin-top: 2em;
    margin-bottom: 0.75em;
}

/* Post content lists */
.single-post .wp-block-post-content ul,
.single-post .wp-block-post-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

/* Post content images */
.single-post .wp-block-post-content img {
    max-width: 100%;
    height: auto;
}

/* Post content code blocks */
.single-post .wp-block-post-content pre,
.single-post .wp-block-post-content code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

.single-post .wp-block-post-content pre {
    background-color: var(--child-color-surface);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1.5em;
}

/* Post tags styling */
.single-post .wp-block-post-terms {
    font-size: 0.875rem;
}

/* ==========================================================================
   Blog Home / Archive Page Styles
   ========================================================================== */

/* Hide blog heading pattern on home (we have hero banner) */
.home main .wp-block-heading:first-child,
.blog main .wp-block-heading:first-child {
    display: none !important;
}

/* Post cards in query loop - clean styling */
.wp-block-post {
    /* Base post card styling */
}

/* Post title in archive/home list */
.home .wp-block-post-title,
.blog .wp-block-post-title,
.archive .wp-block-post-title {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

.home .wp-block-post-title a,
.blog .wp-block-post-title a,
.archive .wp-block-post-title a {
    text-decoration: none;
    color: var(--child-color-primary);
    transition: color var(--child-transition-fast);
}

.home .wp-block-post-title a:hover,
.blog .wp-block-post-title a:hover,
.archive .wp-block-post-title a:hover {
    color: var(--child-color-accent);
}

/* Post excerpt styling */
.wp-block-post-excerpt {
    color: var(--child-color-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Post date in archive list */
.wp-block-post-date {
    font-size: 0.8125rem;
    color: var(--child-color-secondary);
}

/* Post categories/terms styling */
.wp-block-post-terms {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.wp-block-post-terms a {
    color: var(--child-color-accent);
    text-decoration: none;
}

.wp-block-post-terms a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Clean Layout - Remove Extra Margins/Padding
   ========================================================================== */

/* Ensure hero banner sits at top without gaps */
body:not(.wp-admin) .hero-banner {
    margin-top: 0;
}

/* Custom header should be below body top */
body:not(.wp-admin) .custom-header-nav {
    position: sticky;
    top: 0;
}

/* Content flows naturally after hero banner */
body:not(.wp-admin) .hero-banner + main,
body:not(.wp-admin) .hero-banner ~ main {
    margin-top: 0;
}