@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

html {
    scroll-behavior: smooth;
}

#skills,
#certificates,
#projects,
#phonenumber {
    scroll-margin-top: 80px;
}

:root {
    --bg-dark: #11152C;
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #555555;
    --btn-bg: #f0f0f0;
    --border: #d0d0d0;
    --card-bg: #f8f8f8;
    --card-hover: #eeeeee;
    --card-hover-border: rgba(0, 0, 0, 0.25);
    --content-max-width: 1120px;
    --content-padding: 100px;
}

body.dark-mode {
    --bg-color: var(--bg-dark);
    --text-color: #f5f5f5;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --btn-bg: #333333;
    --border: #858585;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-hover: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(255, 255, 255, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    position: sticky;
    top: 0;
    left: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
    background: var(--bg-color);
    transition: background-color 0.3s, border-color 0.3s;
}

.header-inner {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

header .header-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

header .logo {
    height: 54px;
}

header .header-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    justify-content: flex-end;
    align-items: center;
    flex: 1;
    min-width: 0;
}

header .menu-logo {
    width: 32px;
    height: 32px;
    cursor: pointer;
    transition: transform 0.3s;
}

body:not(.dark-mode) header .menu-logo {
    filter: invert(1);
}

header .menu-logo:hover {
    transform: scale(1.2);
} 
header .mobile-menu {
    display: flex;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-color);
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-16px);
    transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
}

header .mobile-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

header .mobile-menu a {
    color: var(--text-color);
    text-decoration: none;
    padding: 15px;
    font-size: 18px;
}

header .tittle-header {
    font-size: 24px;
    font-weight: bold;
    color: var(--text-color);
}

header .header-nav .tag,
header .header-nav .tagurl {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    min-height: 36px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
}

/* Ползунок переключения темы: таблетка в цветах сайта, иконка без круга */
.theme-slider {
    position: relative;
    width: 52px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--card-bg);
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    flex-shrink: 0;
}

.theme-slider:hover {
    background: var(--card-hover);
    border-color: var(--card-hover-border);
}

.theme-slider-thumb {
    position: absolute;
    left: 6px;
    top: 50%;
    width: 20px;
    height: 20px;
    margin-top: -10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    pointer-events: none;
}

.theme-slider-icon {
    width: 16px;
    height: 16px;
    object-fit: contain;
    position: absolute;
}

/* Светлая тема: солнце слева */
.theme-slider-icon.icon-day {
    display: block;
}

.theme-slider-icon.icon-moon {
    display: none;
}

/* Тёмная тема: луна справа, иконки светлые */
body.dark-mode .theme-slider-icon.icon-day {
    display: none;
}

body.dark-mode .theme-slider-icon.icon-moon {
    display: block;
}

body.dark-mode .theme-slider-icon {
    filter: brightness(0) invert(1);
}

body.dark-mode .theme-slider-thumb {
    transform: translateX(20px);
}

header .header-nav .tag:hover,
header .header-nav .tagurl:hover {
    background: var(--card-hover);
    border-color: var(--card-hover-border);
    transform: translateY(-1px);
}

@media (max-width: 900px) {
    header .header-nav { display: none; }
}

@media (max-width: 640px) {
    :root {
        --content-padding: 20px;
    }
}

/* Shared main blocks — контент уже по ширине, как на референсе */
main .main-block {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 32px var(--content-padding) 48px;
}

main .certificates-section.main-block,
main .projects-section.main-block {
    border-top: 1px solid var(--border);
    margin-top: 24px;
    padding-top: 32px;
}

main .section-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

main .section-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

main .about-intro {
    font-size: 17px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

main .skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
}

main .skill-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
}

main .skill-tag .skill-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

main .skill-tag:hover {
    border-color: var(--card-hover-border);
    background: var(--card-hover);
}

main .certificates-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

main .cert-item { margin: 0; }

main .cert-link,
main .project-card {
    display: block;
    padding: 18px 20px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.25s ease;
}

main .cert-link:hover,
main .project-card:hover {
    border-color: var(--card-hover-border);
    background: var(--card-hover);
}

main .project-card {
    padding: 22px 20px;
}

main .cert-title {
    display: block;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-color);
}

main .cert-issuer {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
}

main .projects-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

main .project-name {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--text-color);
}

main .project-desc {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0 0 10px;
}

main .project-link-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

main .project-card:hover .project-link-text {
    color: var(--text-color);
}

main .about-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

main .about-block {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card-bg);
}

main .about-block h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

main .about-block p {
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
}

@media (min-width: 640px) {
    main .about-details {
        flex-direction: row;
        flex-wrap: wrap;
    }
    main .about-block {
        flex: 1 1 200px;
    }
    main .projects-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
}

footer {
    max-width: var(--content-max-width);
    margin: 50px auto 16px;
    padding: 0 var(--content-padding);
}

footer .footer-logo {
    width: 24px;
    height: 24px;
    display: block;
    margin: 0 auto;
}

footer .list-documents,
footer .contact ul {
    list-style: none;
    padding: 0;
}

footer .list-documents { margin: 24px 0; }

footer .list-documents li {
    margin-bottom: 16px;
    text-align: center;
}

footer a {
    text-decoration: none;
    color: var(--text-color);
    transition: opacity 0.2s ease, color 0.2s ease;
}

footer a:hover {
    color: var(--text-color);
    opacity: 1;
}

footer .contact h3 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-color);
}

footer .contact li {
    text-align: center;
    margin-bottom: 16px;
}

footer .contact li a {
    color: var(--text-secondary);
}

footer .contact li a:hover {
    color: var(--text-color);
    opacity: 1;
}

footer .rights {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.8;
}