:root {
    --bg-main: #181A18;
    --bg-secondary: #111311;
    --text-main: #ffffff;
    --text-secondary: rgba(255,255,255,0.62);
    --text-muted: rgba(255,255,255,0.45);
    --border-color: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.12);
    --card-bg: rgba(255,255,255,0.04);
    --card-bg-soft: rgba(255,255,255,0.03);
    --card-bg-hover: rgba(255,255,255,0.07);
    --header-bg: rgba(10,10,14,0.65);
    --button-bg: rgba(255,255,255,0.05);
    --button-border: rgba(255,255,255,0.12);
    --button-text: #ffffff;
}

body.light {
    --bg-main: #ffffff;
    --bg-secondary: #f3f4f6;
    --text-main: #111111;
    --text-secondary: rgba(0,0,0,0.68);
    --text-muted: rgba(0,0,0,0.45);
    --border-color: rgba(0,0,0,0.08);
    --border-strong: rgba(0,0,0,0.12);
    --card-bg: rgba(0,0,0,0.03);
    --card-bg-soft: rgba(0,0,0,0.025);
    --card-bg-hover: rgba(0,0,0,0.06);
    --header-bg: rgba(255,255,255,0.75);
    --button-bg: rgba(0,0,0,0.04);
    --button-border: rgba(0,0,0,0.12);
    --button-text: #111111;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding-top: 70px;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text-main);
    background:
            radial-gradient(circle at top center, rgba(120, 120, 120, 0.08), transparent 35%),
            linear-gradient(90deg, var(--bg-main) 0%, var(--bg-secondary) 50%, var(--bg-main) 100%);
    transition: background 0.35s ease, color 0.35s ease;
}

/* HEADER */
.main_header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.header_container{
    width: min(1200px, 92%);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.header_logo{
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    color: var(--text-main);
    text-decoration: none;
}

.header_nav{
    display: flex;
    gap: 26px;
}

.header_nav a{
    font-size: 0.82rem;
    text-decoration: none;
    color: rgba(255,255,255,0.55);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: 0.2s ease;
}

body.light .header_nav a{
    color: rgba(0,0,0,0.55);
}

.header_nav a:hover{
    color: var(--text-main);
}

.header_actions{
    display: flex;
    align-items: center;
}

.theme_toggle{
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--button-border);
    background: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: 0.2s ease;
}

.theme_toggle:hover{
    background: var(--card-bg-hover);
    border-color: var(--border-strong);
}

/* PAGE */
.experiences-page {
    width: min(1200px, 92%);
    margin: 0 auto;
    padding: 70px 0 90px;
}

.page-header {
    max-width: 760px;
    margin-bottom: 50px;
}

.page-kicker {
    margin: 0 0 12px 0;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--text-muted);
}

.page-header h1 {
    margin: 0 0 16px 0;
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
}

.page-intro {
    margin: 0 0 18px 0;
    max-width: 700px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.back-link {
    color: color-mix(in srgb, var(--text-main) 82%, transparent);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--text-main) 25%, transparent);
    padding-bottom: 3px;
}

.back-link:hover {
    color: var(--text-main);
    border-color: color-mix(in srgb, var(--text-main) 60%, transparent);
}

.tabs-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tabs-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tab-button {
    appearance: none;
    border: 1px solid var(--border-strong);
    background: var(--card-bg);
    color: color-mix(in srgb, var(--text-main) 70%, transparent);
    padding: 12px 18px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: 0.2s ease;
}

.tab-button:hover {
    color: var(--text-main);
    border-color: color-mix(in srgb, var(--border-strong) 180%, transparent);
    background: var(--card-bg-hover);
}

.tab-button.active {
    color: var(--bg-secondary);
    background: var(--text-main);
    border-color: var(--text-main);
}

body.light .tab-button.active {
    color: #ffffff;
    background: #111111;
    border-color: #111111;
}

.tabs-content {
    min-height: 420px;
}

.tab-panel {
    display: none;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: 18px;
    padding: 28px;
}

.tab-panel.active {
    display: block;
}

.panel-top {
    margin-bottom: 26px;
}

.panel-date {
    margin: 0 0 8px 0;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.78rem;
}

.panel-top h2 {
    margin: 0 0 8px 0;
    font-size: 2rem;
}

.panel-subtitle {
    margin: 0;
    color: var(--text-secondary);
}

.panel-grid {
    display: grid;
    grid-template-columns: 1.7fr 0.9fr;
    gap: 28px;
}

.panel-main h3 {
    margin: 0 0 12px 0;
    font-size: 1.05rem;
}

.panel-main p,
.panel-main li {
    color: color-mix(in srgb, var(--text-main) 74%, transparent);
    line-height: 1.7;
}

.panel-main p {
    margin: 0 0 22px 0;
}

.panel-main ul {
    margin: 0 0 24px 20px;
    padding: 0;
}

.panel-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-card {
    border: 1px solid var(--border-color);
    background: var(--card-bg-soft);
    border-radius: 14px;
    padding: 18px;
}

.info-card h4 {
    margin: 0 0 10px 0;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-muted);
}

.info-card p {
    margin: 0;
    color: color-mix(in srgb, var(--text-main) 76%, transparent);
    line-height: 1.6;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tags span {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--card-bg) 180%, transparent);
    color: color-mix(in srgb, var(--text-main) 86%, transparent);
    font-size: 0.85rem;
}

@media (max-width: 900px) {
    .panel-grid {
        grid-template-columns: 1fr;
    }

    .tab-panel {
        padding: 22px;
    }
}

@media (max-width: 800px){
    .header_nav{
        display: none;
    }
}

@media (max-width: 640px) {
    .experiences-page {
        width: 92%;
        padding: 50px 0 70px;
    }

    .tabs-nav {
        gap: 10px;
    }

    .tab-button {
        width: 100%;
        border-radius: 12px;
        text-align: left;
    }

    .panel-top h2 {
        font-size: 1.5rem;
    }
}