/* Shared theme */
:root {
    --bg-color: #1a1918;
    --text-main: #f2ede4;
    --accent: #ff9f31;
    --accent-soft: #fda01d;
    --surface: #262422;
    --border: #3d3a36;

    --font-code: "JetBrains Mono", monospace;

    --content-width: 1080px;
    --section-inline: clamp(20px, 8vw, 240px);
    --hero-inline: clamp(16px, 6vw, 120px);
    --header-offset: 120px;
    --header-padding: 40px 50px;
    --mobile-header-padding: 28px 20px;
    --transition-fast: 0.3s;
    --button-radius: 5px;
    --card-radius: 8px;
    --button-padding: 10px 18px;
    --button-shadow: 0 5px 15px rgba(166, 144, 118, 0.18);
    --card-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
    --mobile-menu-shadow: 0 18px 40px rgba(0, 0, 0, 0.24);
    --surface-gradient: linear-gradient(180deg, rgba(38, 36, 34, 0.95) 0%, rgba(26, 25, 24, 0.98) 100%);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-offset);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    max-width: var(--content-width);
    min-height: 100vh;
    margin: 0 auto;
    overflow-x: hidden;
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-code);
    line-height: 1.5;
}

body.body--locked {
    overflow: hidden;
}

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

a {
    color: inherit;
}

button,
input,
textarea {
    font: inherit;
}

.header__logo,
.btn {
    font-family: var(--font-code);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 14px 20px;
    border-radius: var(--button-radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 0.8rem;
    letter-spacing: 2px;
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease, color 0.4s ease, background-color 0.4s ease;
}

.btn--primary {
    border: 1px solid var(--accent);
    background: var(--accent);
    color: var(--bg-color);
}

.btn--secondary {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-main);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 159, 49, 0.2);
}

.btn--secondary:hover {
    border-color: var(--accent);
    background: rgba(255, 159, 49, 0.05);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
    box-shadow: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

header {
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: var(--header-padding);
    background: rgba(26, 25, 24, 0.94);
    border-bottom: 1px solid rgba(61, 58, 54, 0.85);
    backdrop-filter: blur(10px);
}

.header__logo {
    display: inline-flex;
    align-items: center;
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    transition: color var(--transition-fast);
}

.header__logo:hover {
    color: var(--accent);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header__burger-menu,
.mobile-nav {
    display: none;
}

.header__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1;
    letter-spacing: 1px;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.header__link:hover,
.header__link[aria-current="page"] {
    color: var(--accent);
}

.header__link--primary,
.mobile-nav__link--primary {
    border: 1px solid var(--accent);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-soft) 100%);
    color: var(--bg-color);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}

.header__link--primary {
    padding: var(--button-padding);
    border-radius: var(--button-radius);
    box-shadow: var(--button-shadow);
}

.header__link--primary:hover,
.mobile-nav__link--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 159, 49, 0.3);
    color: var(--bg-color);
}

footer {
    margin-top: 40px;
    padding: 30px 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.8rem;
}

.scroll-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1150;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 1px solid var(--border);
    background: rgba(38, 36, 34, 0.92);
    color: var(--text-main);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.scroll-top:hover {
    border-color: var(--accent);
    background-color: var(--bg-color);
    color: var(--accent);
}

.divider {
    display: block;
    width: 90%;
    height: 2px;
    margin: 60px auto;
    border: none;
    background: var(--border);
}

.section-heading {
    position: relative;
    margin-bottom: 24px;
    padding-left: 20px;
    font-family: var(--font-code);
    font-weight: 400;
    letter-spacing: 1px;
}

.section-heading::before {
    content: "#";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.section-copy {
    position: relative;
    max-width: 42rem;
    padding-left: 20px;
    line-height: 1.7;
}

.section-copy::before {
    content: "//";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.section-note {
    position: relative;
    margin-top: 28px;
    padding-left: 20px;
    color: var(--accent);
    font-weight: 500;
    letter-spacing: 1px;
}

.section-note::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.page-intro {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    min-height: calc(100vh - 120px);
    gap: 40px;
    padding-inline: var(--hero-inline);
}

.page-intro__content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 38rem;
}

.page-intro--solo {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
}

.page-intro__title {
    padding-top: 28px;
    margin-bottom: 16px;
    font-size: 2rem;
    font-weight: 200;
    letter-spacing: 2px;
}

.page-intro__subtitle {
    position: relative;
    margin-bottom: 36px;
    padding-left: 20px;
    color: var(--accent);
    line-height: 1.6;
}

.page-intro__subtitle::before {
    content: ">";
    position: absolute;
    left: 0;
    font-weight: bold;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    padding-inline: var(--section-inline);
}

.surface-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 100%;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    background: var(--surface-gradient);
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.surface-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(255, 159, 49, 0.16), transparent 45%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.surface-card:hover {
    border-color: var(--accent);
    transform: translateY(-6px);
    box-shadow: var(--card-shadow);
}

.surface-card:hover::before {
    opacity: 1;
}

.surface-card > * {
    position: relative;
    z-index: 1;
}

.stagger-grid > * {
    animation: cardRise 0.7s ease both;
}

.stagger-grid > *:nth-child(2) {
    animation-delay: 0.08s;
}

.stagger-grid > *:nth-child(3) {
    animation-delay: 0.16s;
}

.stagger-grid > *:nth-child(4) {
    animation-delay: 0.24s;
}

.stagger-grid > *:nth-child(5) {
    animation-delay: 0.32s;
}

.stagger-grid > *:nth-child(6) {
    animation-delay: 0.4s;
}

@keyframes pageFadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes cardRise {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    :root {
        --header-offset: 100px;
    }

    header {
        position: sticky;
        top: 0;
        padding: var(--mobile-header-padding);
    }

    .header__nav {
        display: none;
    }

    .header__burger-menu {
        z-index: 1100;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
        width: 44px;
        height: 44px;
        border: none;
        background: transparent;
        cursor: pointer;
    }

    .header__burger-menu span {
        width: 24px;
        height: 2px;
        background: var(--text-main);
        transform-origin: center;
        transition: transform 0.3s ease, opacity 0.2s ease, background-color 0.3s ease;
    }

    .header__burger-menu:hover span {
        background: var(--accent);
    }

    .header__burger-menu.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .header__burger-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .header__burger-menu.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .mobile-nav {
        position: fixed;
        top: var(--header-offset);
        left: 0;
        right: 0;
        z-index: 1050;
        display: flex;
        flex-direction: column;
        gap: 8px;
        padding: 16px;
        background: var(--surface);
        box-shadow: var(--mobile-menu-shadow);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-18px) scaleY(0.9);
        transform-origin: top;
        transition: transform 0.28s ease, opacity 0.28s ease, visibility 0.28s ease;
    }

    .mobile-nav.open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0) scaleY(1);
    }

    .mobile-nav__link {
        display: block;
        width: 100%;
        padding: 14px 6px;
        border-bottom: 1px solid var(--border);
        background: transparent;
        color: var(--text-main);
        text-align: center;
        text-decoration: none;
        font-size: 1rem;
        letter-spacing: 1px;
        transition: color var(--transition-fast);
    }

    .mobile-nav__link:not(.mobile-nav__link--primary):hover,
    .mobile-nav__link[aria-current="page"] {
        color: var(--accent);
    }

    .mobile-nav__link--primary {
        display: block;
        margin-top: 8px;
        padding: 14px 16px;
        border: 1px solid var(--accent);
        border-bottom: none;
        border-radius: var(--button-radius);
        background: linear-gradient(135deg, var(--accent) 0%, var(--accent-soft) 100%);
        color: var(--bg-color);
        text-align: center;
        box-shadow: var(--button-shadow);
        transition: transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
    }

    .mobile-nav__link--primary:hover,
    .mobile-nav__link--primary:focus-visible {
        color: var(--bg-color);
    }

    .mobile-nav__link:last-child {
        border-bottom: none;
    }

    .divider {
        width: 80%;
        height: 1px;
    }

    .page-intro {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 28px;
        padding: 48px 20px 12px;
    }

    .page-intro__content {
        align-items: center;
        max-width: none;
        text-align: center;
    }

    .page-intro__subtitle {
        padding-left: 0;
    }

    .page-intro__subtitle::before {
        position: relative;
        margin-right: 8px;
    }

    .cards-grid {
        gap: 20px;
        padding-inline: 20px;
    }

    .scroll-top {
        right: 16px;
        bottom: 16px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    :root {
        --header-offset: 85px;
        --mobile-header-padding: 20px 16px;
    }

    .header__logo {
        font-size: 1.35rem;
    }

    .mobile-nav {
        padding: 14px 12px 18px;
    }

    .mobile-nav__link {
        font-size: 0.95rem;
        letter-spacing: 0.5px;
    }

    .page-intro__title {
        padding-top: 0;
        font-size: 1.7rem;
        letter-spacing: 1px;
    }

    .page-intro__subtitle {
        margin-bottom: 28px;
        font-size: 1rem;
    }

    .surface-card {
        padding: 20px;
    }

    footer {
        padding-inline: 16px;
    }
}