.content-section .section-content>h3 {
    margin: 32px 0 20px;
    padding: 0;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.01em;
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-primary);
    line-height: 1.4;
    font-feature-settings: "palt" 1, "kern" 1;
}

.content-section .section-content>h3::before {
    content: "";
    width: 5px;
    height: 22px;
    border-radius: 3px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0.9;
}

.content-section .section-content>h3::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border-line);
    opacity: .5;
}

@media (max-width: 480px) {
    .content-section .section-content>h3 {
        font-size: 18px;
        margin: 24px 0 16px;
    }

    .content-section .section-content>h3::after {
        display: none;
    }

    .content-section h2 {
        font-size: 22px;
        padding: 20px 24px 16px;
    }

    .content-section .section-content {
        padding: 20px 24px;
    }
}

.profile-sidebar {
    position: sticky;
    top: 24px;
    height: max-content;
}


.award-detail {
    color: var(--text-muted);
}

@media (max-width:1024px) {
    .grid {
        display: block;
        gap: 24px;
    }

    .main-content {
        margin-top: 0;
    }

    .profile-sidebar {
        position: static !important;
        top: auto !important;
        height: auto;
        max-height: none;
        overflow: visible;
        background: var(--background-elevated);
        z-index: 1;
        margin-bottom: 24px;
    }

    .profile-sidebar .profile-content {
        padding: 24px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .profile-image {
        width: 120px;
        height: 120px;
        margin: 0;
    }

    .profile-name {
        font-size: 28px;
        margin: 0;
    }

    .profile-title {
        margin: 0;
        text-align: center;
    }

    .social-links {
        margin-top: 16px;
        max-width: none;
        grid-template-columns: repeat(6, 1fr);
        gap: 8px;
    }

    section[id] {
        scroll-margin-top: 12px;
    }
}

@media (min-width:981px) {

    #about,
    #experience,
    #publications,
    #education,
    #talks,
    #committee,
    #others {
        scroll-margin-top: 40px;
    }
}

/* デフォルト（ライトテーマ）設定 - VSCode Light+テーマ風 */
:root {
    --background-primary: #ffffff;
    --background-elevated: rgba(248, 248, 248, 0.95);
    --background-glass: rgba(248, 248, 248, 0.75);
    --text-primary: #333333;
    --text-muted: #6a6a6a;
    --border-line: rgba(229, 229, 229, 0.8);
    --accent-primary: #0066cc;
    --accent-secondary: #005a9e;
    --shadow-default: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
    --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --border-radius-default: 16px;
    --border-radius-small: 8px;
    --border-radius-large: 24px;
    --max-width-container: 1400px;
}

/* 環境のダークモード設定に自動対応（VSCode Dark+テーマ風） */
@media (prefers-color-scheme: dark) {
    :root {
        --background-primary: #1e1e1e;
        --background-elevated: rgba(37, 37, 38, 0.95);
        --background-glass: rgba(37, 37, 38, 0.75);
        --text-primary: #d4d4d4;
        --text-muted: #969696;
        --border-line: rgba(84, 84, 84, 0.6);
        --accent-primary: #569cd6;
        --accent-secondary: #4fc1ff;
        --shadow-default: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
        --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.15);
    }
    
    .social-icon {
        border: 1px solid rgba(255, 255, 255, 0.15);
        box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
    }
    
    .card::before {
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    }
}

/* 手動でライトテーマを指定した場合（VSCode Light+テーマ風） */
html[data-theme="light"] {
    --background-primary: #ffffff;
    --background-elevated: #f8f8f8;
    --background-glass: rgba(248, 248, 248, 0.75);
    --text-primary: #333333;
    --text-muted: #6a6a6a;
    --border-line: #e5e5e5;
    --accent-primary: #0066cc;
    --accent-secondary: #005a9e;
    --shadow-default: 0 10px 24px rgba(0, 0, 0, .08), 0 6px 10px rgba(0, 0, 0, .04);
    --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
}

/* 手動ライトテーマ時にダークモードメディアクエリをオーバーライド */
html[data-theme="light"] .social-icon {
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
}

html[data-theme="light"] .profile-sections-wrapper {
    border-color: var(--border-line);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

html[data-theme="light"] .profile-sections-wrapper:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* 手動でダークテーマを指定した場合（VSCode Dark+テーマ風） */
html[data-theme="dark"] {
    --background-primary: #1e1e1e;
    --background-elevated: #252526;
    --background-glass: rgba(37, 37, 38, 0.75);
    --text-primary: #d4d4d4;
    --text-muted: #969696;
    --border-line: #545454;
    --accent-primary: #569cd6;
    --accent-secondary: #4fc1ff;
    --shadow-default: 0 10px 24px rgba(0, 0, 0, .4), 0 6px 10px rgba(0, 0, 0, .2);
    --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.15);
}

html[data-theme="dark"] .social-icon {
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08);
}

/* カードの上部ハイライトをダークモード用に調整 */
html[data-theme="dark"] .card::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
}



.publication-details,
.talkdetail,
.awarddetail,
.committeedetail,
.schdetail,
.edudetail,
.detail {
    color: var(--text-muted);
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: "Inter", "Noto Sans JP", system-ui, -apple-system, "Segoe UI", "Yu Gothic UI", "Yu Gothic", "Meiryo", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Roboto, Helvetica, Arial, sans-serif;
    background: var(--background-primary);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    min-height: 100vh;
    font-feature-settings: "palt" 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.7;
    letter-spacing: 0.02em;
}

a {
    color: var(--accent-primary);
    text-decoration: none
}

a:hover {
    opacity: .9
}

.container {
    max-width: var(--max-width-container);
    margin-inline: auto;
    padding: 32px 24px;
}

html {
    scroll-behavior: smooth
}

.grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 40px;
    align-items: start;
    max-width: 1400px;
    margin: 0 auto;
}

@media(max-width:1024px) {
    .grid {
        grid-template-columns: 1fr;
        gap: 24px;
        max-width: 800px;
    }
    
    .container {
        padding: 24px 20px;
    }
}

.card {
    background: var(--background-elevated);
    border: 2.0px solid var(--border-line);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-default);
    backdrop-filter: blur(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-default), 0 0 0 1px rgba(102, 126, 234, 0.1);
}

/* Disable hover animation for profile sidebar */
.profile-sidebar.card:hover {
    transform: none;
}

.card .profile-content {
    padding: 24px
}

.profile-sidebar {
    position: sticky;
    top: 24px;
    height: max-content;
}

.profile-sidebar .profile-content {
    padding: 40px 32px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.profile-image {
    width: 160px;
    height: 160px;
    border-radius: 40px;
    display: block;
    object-fit: cover;
    box-shadow: var(--shadow-subtle);
    margin: 0;
    border: 4px solid var(--background-primary);
    transition: all 0.3s ease;
}


.profile-name {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0;
    color: var(--text-primary);
    line-height: 1.2;
    font-feature-settings: "palt" 1, "kern" 1;
}

.profile-title {
    font-size: 17px;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
    text-align: center;
    max-width: 300px;
    letter-spacing: 0.01em;
}

.tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 14px 0 10px
}

.tag {
    font-size: 12px;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 6px 10px;
    border-radius: 999px;
    font-weight: 600
}

.social-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 0;
    max-width: 240px;
    width: 100%;
}

.social-icon {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    background: var(--background-glass);
    border-radius: var(--border-radius-default);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.social-icon:hover {
    transform: translateY(-2px);
    background: var(--background-elevated);
    box-shadow: var(--shadow-subtle);
}

.social-icon svg,
.social-icon img {
    width: 24px;
    height: 24px;
}


.social-icon svg[fill="#000000"] {
    fill: var(--text-primary) !important
}

.social-icon-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center
}

.copy-tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--background-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-line);
    padding: 6px 10px;
    border-radius: 10px;
    box-shadow: var(--shadow-default);
    white-space: nowrap;
    z-index: 10
}

.copy-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 7px 7px 0 7px;
    border-style: solid;
    border-color: var(--background-elevated) transparent transparent transparent
}

.copy-tooltip::before {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 8px 8px 0 8px;
    border-style: solid;
    border-color: var(--border-line) transparent transparent transparent;
    filter: blur(.2px);
    margin-top: 1px
}

#copy-status {
    font-size: 12px
}

.quicknav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px
}

.quicknav-title {
    flex-basis: 100%;
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 2px
}

.qbtn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 12px;
    border: 1px solid var(--border-line);
    color: var(--text-primary);
    background: rgba(255, 255, 255, .03);
    font-weight: 700;
    font-size: 13px
}

.qbtn::after {
    content: "↴";
    opacity: .7;
    font-size: 14px
}

.qbtn:hover {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(59, 130, 246, .25), rgba(29, 78, 216, .25));
    color: var(--text-primary);
    transform: translateY(-1px);
}


.divider {
    height: 1px;
    background: var(--border-line);
    opacity: .6;
    margin: 14px 0 6px
}

.content-section {
    margin-bottom: 24px;
}


.content-section h2 {
    font-size: 26px;
    font-weight: 600;
    margin: 0;
    padding: 28px 32px 20px;
    border-bottom: 1px solid var(--border-line);
    letter-spacing: 0.01em;
    color: var(--text-primary);
    position: relative;
    line-height: 1.3;
    font-feature-settings: "palt" 1, "kern" 1;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 32px;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

.content-section .section-content {
    padding: 28px 32px;
}

.content-section .section-content p {
    line-height: 1.8;
    letter-spacing: 0.02em;
    margin-bottom: 1.2em;
}

.content-section .section-content ul {
    line-height: 1.7;
}

.content-section .section-content li {
    margin-bottom: 0.5em;
    letter-spacing: 0.01em;
}

@media (min-width:981px) {

    #about::before,
    #experience::before,
    #publications::before,
    #education::before,
    #talks::before,
    #committee::before,
    #others::before {
        content: "";
        display: block;
        height: 40px;
        margin-top: -40px;
        visibility: hidden;
    }
}

html {
    scroll-padding-top: 56px;
}

.item {
    display: grid !important;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 8px 14px;
    align-items: start;
}

.item>* {
    min-width: 0;
}

.year {
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap !important;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1, "lnum" 1;
}


@media (max-width: 600px) {
    .item {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .year {
        margin-bottom: 4px;
        font-size: 14px;
    }

    #experience .item,
    #education .item,
    #awards .item,
    #others .item {
        padding: 12px 0;
    }
}

:root {
    --year-column-width: 180px;
}

#experience .item,
#education .item,
#awards .item {
    display: grid;
    grid-template-columns: var(--year-column-width) minmax(0, 1fr);
    gap: 6px 16px;
    padding: 14px 0;
    position: relative;
}

#experience .item>*,
#education .item>*,
#awards .item>*,
#others .item>* {
    min-width: 0;
}

#experience .item::after,
#education .item::after,
#awards .item::after,
#others .item::after {
    content: "";
    position: absolute;
    left: var(--year-column-width);
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: var(--border-line);
    opacity: .35;
}

@media (max-width: 600px) {
    :root {
        --year-column-width: 1fr;
    }

    #experience .item::after,
    #education .item::after,
    #awards .item::after,
    #others .item::after {
        display: none;
    }
}


.year {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1, "lnum" 1;
    color: var(--text-muted);
    font-weight: 600;
}


#experience .organization a,
#education .organization a {
    color: var(--text-primary);
    text-decoration: none;
    background-image: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    background-repeat: no-repeat;
    background-size: 100% 2px;
    background-position: 0 100%;
    padding-bottom: 1px;
    font-weight: 700;
}

#experience .organization a:hover,
#education .organization a:hover {
    color: var(--accent-secondary);
}


#experience .organization,
#education .organization {
    line-height: 1.35;
}

#experience .organization .muted,
#education .organization .muted {
    display: block;
    margin-top: 2px;
}

:root {
    --year-column-width: 180px;
    --gap-horizontal: 20px;
    --gap-vertical: 4px;
    --row-padding: 16px;
}

#experience .item,
#education .item,
#awards .item,
#others .item {
    grid-template-columns: var(--year-column-width) minmax(0, 1fr);
    gap: var(--gap-vertical) var(--gap-horizontal);
    padding: 16px 0;
    transition: all 0.2s ease;
}

#experience .organization,
#education .organization,
#awards .award-name,
#others .event-title {
    line-height: 1.28;
}

#experience .item::after,
#education .item::after,
#awards .item::after,
#others .item::after {
    top: 6px;
    bottom: 6px;
    opacity: .25;
}


.publications-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.publications-list li {
    padding: 18px 0;
    border-bottom: 1px dashed var(--border-line);
    transition: all 0.2s ease;
}

.publications-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.publication-title {
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 6px;
    display: block;
    letter-spacing: 0.01em;
    font-feature-settings: "palt" 1;
}


.pill {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--background-elevated);
    background: var(--accent-primary);
    padding: 4px 10px;
    border-radius: 12px;
    margin-left: 0;
    transition: all 0.2s ease;
}

.pill:hover {
    transform: scale(1.05);
    background: var(--accent-secondary);
}

.pill,
a.pill,
a.pill:link,
a.pill:visited,
a.pill:hover,
a.pill:active {
    color: var(--background-elevated) !important;
    text-decoration: none;
}

.event-title .pill {
    margin-left: 8px;
}

.more-wrap {
    padding: 8px 24px 0;
}

.btn.ghost {
    color: var(--text-muted);
    border: 1px dashed var(--border-line);
    background: transparent;
    padding: 8px 12px;
    border-radius: 12px;
    font-weight: 600;
}

.btn.ghost:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}


.muted {
    color: var(--text-muted);
}

a,
a:link,
a:visited {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover,
a:active {
    color: var(--accent-secondary);
}

/* Site Header Styles */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--background-primary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-line);
    z-index: 100;
    padding: 12px 0;
}

/* Add top padding to body to account for fixed header */
body {
    padding-top: 60px; /* Adjust based on header height */
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

/* Language Toggle Styles */
.language-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.lang-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 500;
}

.lang-link:hover {
    color: var(--accent-primary);
    background: var(--background-elevated);
}

.lang-link.active {
    color: var(--accent-primary);
    font-weight: 600;
    background: var(--background-elevated);
}

.lang-separator {
    color: var(--text-muted);
    opacity: 0.5;
    font-weight: 300;
}

@media (max-width: 768px) {
    body {
        padding-top: 55px; /* Slightly smaller padding for mobile */
    }
    
    .header-container {
        padding: 0 16px;
    }
    
    .language-toggle {
        font-size: 13px;
    }
    
    .lang-link {
        padding: 4px 8px;
    }
}

/* GitHub icon theme support */
.github-icon-light {
    display: block;
}

.github-icon-dark {
    display: none;
}

/* Email icon theme support */
.email-icon-light {
    display: block;
}

.email-icon-dark {
    display: none;
}

@media (prefers-color-scheme: dark) {
    .github-icon-light {
        display: none;
    }
    
    .github-icon-dark {
        display: block;
    }
    
    .email-icon-light {
        display: none;
    }
    
    .email-icon-dark {
        display: block;
    }
}

/* Manual theme overrides */
html[data-theme="light"] .github-icon-light {
    display: block;
}

html[data-theme="light"] .github-icon-dark {
    display: none;
}

html[data-theme="light"] .email-icon-light {
    display: block;
}

html[data-theme="light"] .email-icon-dark {
    display: none;
}

html[data-theme="dark"] .github-icon-light {
    display: none;
}

html[data-theme="dark"] .github-icon-dark {
    display: block;
}

html[data-theme="dark"] .email-icon-light {
    display: none;
}

html[data-theme="dark"] .email-icon-dark {
    display: block;
}

/* Profile sections wrapper - subtle container box */
.profile-sections-wrapper {
    background: var(--background-glass);
    border: 1px solid var(--border-line);
    border-radius: var(--border-radius-large);
    padding: 16px;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    transition: all 0.3s ease;
    opacity: 0.7;
}

.profile-sections-wrapper:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

/* Adjust margins for sections within the wrapper */
.profile-sections-wrapper .content-section {
    margin-bottom: 16px;
}

.profile-sections-wrapper .content-section:last-child {
    margin-bottom: 0;
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    .profile-sections-wrapper {
        border-color: rgba(84, 84, 84, 0.3);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    }
    
    .profile-sections-wrapper:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    }
}

html[data-theme="dark"] .profile-sections-wrapper {
    border-color: rgba(84, 84, 84, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

html[data-theme="dark"] .profile-sections-wrapper:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

/* Header Controls - Theme Toggle & Language Toggle Container */
.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle Button Styles */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--border-line);
    border-radius: var(--border-radius-small);
    background: var(--background-elevated);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--background-glass);
    transform: scale(1.05);
    box-shadow: var(--shadow-subtle);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
    transition: all 0.3s ease;
    position: absolute;
}

/* Sun icon - visible in light mode */
.theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

/* Dark mode - show moon icon */
.theme-toggle.dark-mode .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.theme-toggle.dark-mode .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Responsive adjustments for theme toggle */
@media (max-width: 768px) {
    .header-controls {
        gap: 12px;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
    }
    
    .theme-icon {
        width: 18px;
        height: 18px;
    }
}