:root {
    --bg: #f6f7fb;
    --surface: #ffffff;
    --surface-soft: #eef4ff;
    --text: #172033;
    --muted: #647084;
    --line: #dce3ee;
    --primary: #3157d6;
    --primary-dark: #213b9f;
    --accent: #00a99d;
    --rose: #e0567f;
    --amber: #f1a225;
    --shadow: 0 24px 70px rgba(30, 41, 59, 0.12);
    --soft-shadow: 0 14px 36px rgba(30, 41, 59, 0.08);
    --radius: 8px;
    --header-height: 76px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: "Inter", Arial, Helvetica, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(49, 87, 214, 0.16), transparent 34rem),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 45%, #ffffff 100%);
    line-height: 1.65;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

button,
input,
textarea {
    font: inherit;
}

.icon-sprite {
    display: none;
}

.icon {
    width: 1em;
    height: 1em;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 2000;
    transform: translateY(-160%);
    border-radius: var(--radius);
    background: var(--text);
    color: #ffffff;
    padding: 10px 14px;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    border-bottom: 1px solid rgba(220, 227, 238, 0.9);
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px);
}

.navbar {
    width: min(1180px, calc(100% - 40px));
    height: var(--header-height);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo,
.footer-logo {
    color: var(--text);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0;
    text-decoration: none;
}

.logo span,
.footer-logo {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-menu a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    border-radius: var(--radius);
    color: var(--muted);
    padding: 0 12px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: #eef4ff;
    color: var(--primary);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    color: var(--primary);
    cursor: pointer;
}

.menu-toggle .icon {
    width: 22px;
    height: 22px;
}

.menu-toggle .icon-close,
.menu-toggle.is-open .icon-menu {
    display: none;
}

.menu-toggle.is-open .icon-close {
    display: block;
}

.section-block {
    scroll-margin-top: calc(var(--header-height) + 22px);
}

.section {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 92px 0;
}

.muted-section {
    position: relative;
}

.muted-section::before {
    content: "";
    position: absolute;
    inset: 34px calc(50% - 50vw);
    z-index: -1;
    background: linear-gradient(135deg, rgba(238, 244, 255, 0.9), rgba(232, 248, 245, 0.72));
}

.eyebrow {
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 34px;
}

.section-heading h2 {
    max-width: 720px;
    margin-top: 8px;
    font-size: clamp(30px, 5vw, 48px);
    line-height: 1.1;
    letter-spacing: 0;
}

.link-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
    color: var(--muted);
    padding: 0 14px;
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    white-space: nowrap;
    transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.link-chip:hover {
    transform: translateY(-2px);
    border-color: rgba(49, 87, 214, 0.35);
    color: var(--primary);
}

.hero {
    width: min(1180px, calc(100% - 40px));
    min-height: 100vh;
    margin: 0 auto;
    padding: calc(var(--header-height) + 74px) 0 74px;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
    align-items: center;
    gap: 54px;
}

.hero-content h1 {
    margin: 12px 0 18px;
    max-width: 780px;
    font-size: clamp(48px, 8vw, 88px);
    line-height: 0.98;
    letter-spacing: 0;
}

.hero-description {
    max-width: 650px;
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 32px 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    border: 0;
    border-radius: var(--radius);
    padding: 0 18px;
    text-decoration: none;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 16px 34px rgba(49, 87, 214, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-ghost {
    background: #ffffff;
    color: var(--text);
    border: 1px solid var(--line);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    max-width: 520px;
}

.hero-stats div {
    border: 1px solid rgba(220, 227, 238, 0.86);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
    padding: 16px;
    box-shadow: var(--soft-shadow);
}

.hero-stats strong {
    display: block;
    color: var(--text);
    font-size: 24px;
    line-height: 1;
}

.hero-stats span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.profile-card {
    position: relative;
    width: min(420px, 100%);
    aspect-ratio: 4 / 5;
    overflow: hidden;
    border: 10px solid #ffffff;
    border-radius: 8px;
    background: var(--surface-soft);
    box-shadow: var(--shadow);
}

.profile-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 52%, rgba(23, 32, 51, 0.58));
    pointer-events: none;
}

.profile-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-badge {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 18px;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border: 1px solid rgba(255, 255, 255, 0.32);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.88);
    padding: 13px 14px;
    color: var(--text);
    backdrop-filter: blur(14px);
}

.profile-badge span {
    color: var(--accent);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.profile-badge strong {
    font-size: 15px;
}

.about-grid,
.contact-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 28px;
    align-items: stretch;
}

.about-photo {
    min-height: 430px;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--surface-soft);
    box-shadow: var(--soft-shadow);
}

.about-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-panel,
.contact-panel,
.contact-form,
.education-card,
.skill-card,
.timeline-content {
    border: 1px solid rgba(220, 227, 238, 0.9);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--soft-shadow);
}

.about-panel {
    padding: clamp(24px, 4vw, 42px);
}

.about-panel h3,
.contact-panel h3 {
    margin-bottom: 14px;
    font-size: 28px;
    line-height: 1.2;
}

.about-panel p,
.contact-panel p {
    color: var(--muted);
    margin-bottom: 16px;
}

.info-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 24px;
}

.info-list div {
    border-left: 3px solid var(--primary);
    border-radius: var(--radius);
    background: #f8fbff;
    padding: 12px 14px;
}

.info-list span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.info-list strong {
    display: block;
    margin-top: 3px;
    line-height: 1.35;
}

.education-grid,
.skills-grid {
    display: grid;
    gap: 16px;
}

.education-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.education-card {
    padding: 24px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.education-card:hover,
.skill-card:hover,
.timeline-content:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 48px rgba(30, 41, 59, 0.11);
}

.education-card span,
.timeline-content span {
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
}

.education-card h3 {
    margin-top: 12px;
    font-size: 20px;
    line-height: 1.3;
}

.education-card p {
    color: var(--muted);
    margin-top: 8px;
}

.highlight-card {
    background: linear-gradient(160deg, #ffffff, #edf7ff);
    border-color: rgba(49, 87, 214, 0.26);
}

.soft-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.hard-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-card {
    --icon-bg: #eef4ff;
    --icon-color: var(--primary);
    padding: 24px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:nth-child(2) {
    --icon-bg: #e8f8f5;
    --icon-color: var(--accent);
}

.skill-card:nth-child(3) {
    --icon-bg: #fff4dc;
    --icon-color: var(--amber);
}

.skill-card:nth-child(4) {
    --icon-bg: #fff0f4;
    --icon-color: var(--rose);
}

.skill-card:nth-child(5) {
    --icon-bg: #edf2ff;
    --icon-color: #6d5bd0;
}

.skill-card:nth-child(6) {
    --icon-bg: #fff0f4;
    --icon-color: var(--rose);
}

.skill-card:nth-child(7) {
    --icon-bg: #eef8e8;
    --icon-color: #54a24b;
}

.skill-card:nth-child(8) {
    --icon-bg: #e7f7fb;
    --icon-color: #1d8ca8;
}

.skill-card:nth-child(9) {
    --icon-bg: #f5edff;
    --icon-color: #7d4ed8;
}

.skill-icon {
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    margin-bottom: 18px;
    border-radius: var(--radius);
    background: var(--icon-bg);
    color: var(--icon-color);
}

.skill-icon .icon {
    width: 28px;
    height: 28px;
}

.skill-card h3 {
    margin-bottom: 8px;
    font-size: 19px;
}

.skill-card p {
    color: var(--muted);
    font-size: 14px;
}

.timeline {
    position: relative;
    max-width: 880px;
    margin: 0 auto;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 8px;
    bottom: 8px;
    left: 13px;
    width: 2px;
    background: linear-gradient(var(--primary), var(--accent));
}

.timeline-item {
    position: relative;
    padding-left: 48px;
    margin-bottom: 18px;
    scroll-margin-top: calc(var(--header-height) + 24px);
}

.timeline-marker {
    position: absolute;
    top: 22px;
    left: 4px;
    width: 20px;
    height: 20px;
    border: 4px solid #ffffff;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(49, 87, 214, 0.16);
}

.timeline-content {
    padding: 24px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.timeline-content h3 {
    margin: 6px 0 8px;
    font-size: 22px;
}

.timeline-content p {
    color: var(--muted);
}

.timeline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 12px;
}

.text-link {
    display: inline-flex;
    align-items: center;
    border: 0;
    background: transparent;
    color: var(--primary);
    padding: 0;
    text-decoration: none;
    font-weight: 800;
    cursor: pointer;
}

.text-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.deep-target.is-highlighted .timeline-content {
    border-color: rgba(49, 87, 214, 0.58);
    box-shadow: 0 22px 60px rgba(49, 87, 214, 0.18);
}

.contact-grid {
    grid-template-columns: 0.95fr 1.05fr;
}

.contact-panel,
.contact-form {
    padding: clamp(24px, 4vw, 36px);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    padding: 14px;
    text-decoration: none;
    margin-top: 12px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-item:hover {
    transform: translateX(4px);
    border-color: rgba(49, 87, 214, 0.32);
}

.contact-item span {
    display: grid;
    place-items: center;
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: #eef4ff;
    color: var(--primary);
}

.contact-item:nth-of-type(2) span {
    background: #e8f8f5;
    color: var(--accent);
}

.contact-item:nth-of-type(3) span {
    background: #fff0f4;
    color: var(--rose);
}

.contact-item:nth-of-type(4) span {
    background: #f4f5f7;
    color: var(--text);
}

.contact-item strong,
.contact-item small {
    display: block;
}

.contact-item small {
    color: var(--muted);
}

.contact-form {
    display: grid;
    gap: 10px;
}

.contact-form label {
    color: var(--text);
    font-size: 13px;
    font-weight: 800;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    color: var(--text);
    padding: 13px 14px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: rgba(49, 87, 214, 0.7);
    box-shadow: 0 0 0 4px rgba(49, 87, 214, 0.12);
}

.form-note {
    min-height: 24px;
    color: var(--muted);
    font-size: 13px;
}

.site-footer {
    background: #121a2a;
    color: #ffffff;
    padding: 48px 20px;
    text-align: center;
}

.footer-content {
    width: min(760px, 100%);
    margin: 0 auto;
}

.footer-content p {
    color: #b8c2d4;
}

.social {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
}

.social a {
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    color: #ffffff;
    padding: 8px 12px;
    text-decoration: none;
    font-weight: 700;
}

.social a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.copyright {
    font-size: 13px;
}

.toast {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 3000;
    transform: translateY(18px);
    opacity: 0;
    pointer-events: none;
    border-radius: var(--radius);
    background: var(--text);
    color: #ffffff;
    padding: 12px 14px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: var(--shadow);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

@media (max-width: 1020px) {
    .hero,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + 52px);
    }

    .hero-visual {
        order: -1;
    }

    .profile-card {
        width: min(360px, 100%);
    }

    .education-grid,
    .soft-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 840px) {
    .menu-toggle {
        display: inline-flex;
    }

    .nav-menu {
        position: fixed;
        inset: var(--header-height) 16px auto;
        display: grid;
        gap: 8px;
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: #ffffff;
        padding: 12px;
        box-shadow: var(--shadow);
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu a {
        justify-content: center;
        min-height: 46px;
    }

    .section-heading {
        align-items: start;
        flex-direction: column;
    }

    .hard-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    :root {
        --header-height: 68px;
    }

    .navbar,
    .section,
    .hero {
        width: min(100% - 28px, 1180px);
    }

    .section {
        padding: 70px 0;
    }

    .hero {
        gap: 28px;
        padding-bottom: 54px;
    }

    .hero-content h1 {
        font-size: 46px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-actions,
    .hero-stats,
    .info-list,
    .education-grid,
    .soft-grid,
    .hard-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        display: grid;
    }

    .btn,
    .link-chip {
        width: 100%;
    }

    .about-photo {
        min-height: 320px;
    }

    .timeline-item {
        padding-left: 38px;
    }

    .timeline-content {
        padding: 20px;
    }

    .toast {
        right: 14px;
        left: 14px;
        text-align: center;
    }
}