:root {
    --navy-950: #071d2f;
    --navy-900: #0b2943;
    --navy-800: #123f68;
    --navy-700: #185482;
    --blue-600: #2376a8;
    --blue-500: #2d8fbd;
    --blue-300: #8fd0e5;
    --blue-100: #e8f5fa;
    --aqua-500: #2db7b0;
    --orange-600: #d95f18;
    --orange-500: #f17822;
    --orange-400: #ff9142;
    --sand-100: #f6f1e8;
    --white: #ffffff;
    --gray-50: #f7f9fb;
    --gray-100: #eef2f5;
    --gray-200: #dce3e8;
    --gray-400: #91a0aa;
    --gray-600: #52616b;
    --gray-700: #3c4952;
    --gray-800: #27333b;
    --gray-900: #172229;

    --text: var(--gray-800);
    --text-soft: var(--gray-600);
    --border: rgba(18, 63, 104, 0.14);
    --border-strong: rgba(18, 63, 104, 0.24);

    --shadow-sm:
        0 8px 22px rgba(7, 29, 47, 0.08);

    --shadow-md:
        0 16px 40px rgba(7, 29, 47, 0.13);

    --shadow-lg:
        0 24px 65px rgba(7, 29, 47, 0.18);

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-pill: 999px;

    --content-width: 1240px;
    --reading-width: 760px;

    --header-height: 92px;

    --transition-fast: 180ms ease;
    --transition-standard: 280ms ease;
    --transition-slow: 500ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(
            circle at 12% 8%,
            rgba(45, 183, 176, 0.08),
            transparent 28rem
        ),
        linear-gradient(
            180deg,
            var(--gray-50) 0%,
            var(--white) 45rem
        );
    font-family:
        Inter,
        "Segoe UI",
        Arial,
        Helvetica,
        sans-serif;
    font-size: 17px;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

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

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--navy-700);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--orange-600);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 0.65em;
    color: var(--navy-950);
    font-family:
        "Arial Narrow",
        "Roboto Condensed",
        "Segoe UI",
        Arial,
        sans-serif;
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.025em;
}

h1 {
    font-size: clamp(2.45rem, 5vw, 5rem);
}

h2 {
    font-size: clamp(2rem, 3.5vw, 3.4rem);
}

h3 {
    font-size: clamp(1.35rem, 2vw, 1.8rem);
}

p {
    margin: 0 0 1.15em;
}

ul,
ol {
    margin: 0 0 1.25em;
    padding-left: 1.35em;
}

blockquote {
    margin: 2rem 0;
    padding: 1.35rem 1.5rem;
    border-left: 5px solid var(--orange-500);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    background: var(--blue-100);
    color: var(--navy-900);
    font-size: 1.08rem;
}

::selection {
    color: var(--white);
    background: var(--navy-700);
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 9999;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--white);
    background: var(--navy-950);
    transform: translateY(-160%);
    transition: transform var(--transition-fast);
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--white);
    background:
        linear-gradient(
            120deg,
            rgba(7, 29, 47, 0.97),
            rgba(18, 63, 104, 0.96)
        );
    box-shadow:
        0 8px 28px rgba(7, 29, 47, 0.14);
    backdrop-filter: blur(18px);
    transition:
        height var(--transition-standard),
        background var(--transition-standard),
        box-shadow var(--transition-standard);
}

.site-header.is-scrolled {
    height: 74px;
    background:
        linear-gradient(
            120deg,
            rgba(7, 29, 47, 0.99),
            rgba(11, 41, 67, 0.99)
        );
    box-shadow:
        0 10px 32px rgba(7, 29, 47, 0.24);
}

.header-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 2rem), var(--content-width));
    height: 100%;
    margin: 0 auto;
    gap: 1.5rem;
}

.site-brand {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    color: var(--white);
    text-decoration: none;
}

.site-brand:hover {
    color: var(--white);
}

.brand-mark {
    width: 62px;
    height: 62px;
    margin-right: 0.85rem;
    object-fit: contain;
    filter:
        drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
    transition:
        width var(--transition-standard),
        height var(--transition-standard),
        transform var(--transition-standard);
}

.site-brand:hover .brand-mark {
    transform: rotate(-3deg) scale(1.035);
}

.site-header.is-scrolled .brand-mark {
    width: 50px;
    height: 50px;
}

.brand-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.brand-name {
    color: var(--white);
    font-family:
        "Arial Narrow",
        "Roboto Condensed",
        "Segoe UI",
        Arial,
        sans-serif;
    font-size: clamp(1.45rem, 2vw, 2rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.035em;
}

.brand-tagline {
    margin-top: 0.28rem;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.075em;
    text-transform: uppercase;
    white-space: nowrap;
}

.primary-navigation {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.15rem;
}

.primary-navigation > a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.65rem 0.7rem;
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.9rem;
    font-weight: 750;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    transition:
        color var(--transition-fast),
        background var(--transition-fast),
        transform var(--transition-fast);
}

.primary-navigation > a:not(.forum-button)::after {
    position: absolute;
    right: 0.72rem;
    bottom: 0.35rem;
    left: 0.72rem;
    height: 2px;
    border-radius: var(--radius-pill);
    background: var(--orange-400);
    content: "";
    transform: scaleX(0);
    transform-origin: right;
    transition:
        transform var(--transition-standard);
}

.primary-navigation > a:not(.forum-button):hover::after,
.primary-navigation > a:not(.forum-button):focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
}

.primary-navigation > a:hover,
.primary-navigation > a:focus-visible {
    color: var(--white);
    background: rgba(255, 255, 255, 0.07);
}

.primary-navigation .forum-button {
    position: relative;
    isolation: isolate;
    margin-left: 0.55rem;
    padding: 0.78rem 1rem;
    overflow: hidden;
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--orange-600),
            var(--orange-400)
        );
    box-shadow:
        0 8px 20px rgba(217, 95, 24, 0.28);
}

.primary-navigation .forum-button::before {
    position: absolute;
    top: -70%;
    left: -40%;
    z-index: -1;
    width: 26%;
    height: 240%;
    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(255, 255, 255, 0.5),
            transparent
        );
    content: "";
    transform: rotate(20deg);
    transition: left 650ms ease;
}

.primary-navigation .forum-button:hover::before {
    left: 125%;
}

.primary-navigation .forum-button:hover,
.primary-navigation .forum-button:focus-visible {
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--orange-500),
            var(--orange-400)
        );
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    min-height: 44px;
    padding: 0.6rem 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-sm);
    color: var(--white);
    background: rgba(255, 255, 255, 0.06);
    cursor: pointer;
}

.menu-toggle-label {
    font-size: 0.86rem;
    font-weight: 800;
}

.menu-toggle-icon {
    display: grid;
    width: 22px;
    gap: 4px;
}

.menu-toggle-icon span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: var(--radius-pill);
    background: currentColor;
    transition:
        transform var(--transition-standard),
        opacity var(--transition-standard);
}

.menu-toggle[aria-expanded="true"]
.menu-toggle-icon span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"]
.menu-toggle-icon span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"]
.menu-toggle-icon span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

main {
    min-height: 70vh;
    overflow: clip;
}

.content-shell {
    width: min(calc(100% - 2rem), var(--content-width));
    margin-inline: auto;
}

.reading-shell {
    width: min(calc(100% - 2rem), var(--reading-width));
    margin-inline: auto;
}

.section {
    position: relative;
    padding: clamp(4rem, 8vw, 7rem) 0;
}

.section-tight {
    padding: clamp(2.75rem, 5vw, 4.5rem) 0;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    margin-bottom: 2rem;
    gap: 1.5rem;
}

.section-heading-copy {
    max-width: 760px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    margin-bottom: 0.75rem;
    color: var(--orange-600);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 30px;
    height: 3px;
    margin-right: 0.6rem;
    border-radius: var(--radius-pill);
    background: currentColor;
    content: "";
}

.section-title {
    margin-bottom: 0.45rem;
}

.section-intro {
    max-width: 720px;
    margin: 0;
    color: var(--text-soft);
    font-size: 1.05rem;
}

.button,
.button-secondary,
.button-ghost {
    position: relative;
    isolation: isolate;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0.82rem 1.2rem;
    overflow: hidden;
    border: 0;
    border-radius: var(--radius-pill);
    font-size: 0.94rem;
    font-weight: 850;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast),
        color var(--transition-fast);
}

.button {
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--orange-600),
            var(--orange-400)
        );
    box-shadow:
        0 12px 28px rgba(217, 95, 24, 0.24);
}

.button::before {
    position: absolute;
    top: -75%;
    left: -45%;
    z-index: -1;
    width: 24%;
    height: 250%;
    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(255, 255, 255, 0.48),
            transparent
        );
    content: "";
    transform: rotate(18deg);
    transition: left 700ms ease;
}

.button:hover::before,
.button:focus-visible::before {
    left: 125%;
}

.button:hover,
.button:focus-visible {
    color: var(--white);
    transform: translateY(-3px);
    box-shadow:
        0 16px 34px rgba(217, 95, 24, 0.3);
}

.button-secondary {
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--navy-800),
            var(--blue-600)
        );
    box-shadow:
        0 12px 28px rgba(18, 63, 104, 0.24);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    color: var(--white);
    transform: translateY(-3px);
    box-shadow:
        0 16px 34px rgba(18, 63, 104, 0.3);
}

.button-ghost {
    border: 1px solid var(--border-strong);
    color: var(--navy-800);
    background: rgba(255, 255, 255, 0.7);
}

.button-ghost:hover,
.button-ghost:focus-visible {
    color: var(--navy-950);
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.93);
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--transition-standard),
        box-shadow var(--transition-standard),
        border-color var(--transition-standard);
}

.card:hover {
    border-color: rgba(45, 143, 189, 0.28);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.card-image {
    overflow: hidden;
    background: var(--gray-200);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition:
        transform 650ms cubic-bezier(0.2, 0.75, 0.25, 1),
        filter var(--transition-slow);
}

.card:hover .card-image img {
    filter: saturate(1.08) contrast(1.03);
    transform: scale(1.055);
}

.card-body {
    padding: 1.35rem;
}

.category-label {
    display: inline-flex;
    align-items: center;
    margin-bottom: 0.75rem;
    padding: 0.38rem 0.65rem;
    border-radius: var(--radius-pill);
    color: var(--navy-800);
    background: var(--blue-100);
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
}

.category-label:hover {
    color: var(--white);
    background: var(--navy-700);
}

.meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.9rem;
    color: var(--gray-600);
    font-size: 0.82rem;
}

.meta > span {
    display: inline-flex;
    align-items: center;
}

.meta > span:not(:last-child)::after {
    width: 4px;
    height: 4px;
    margin-left: 0.9rem;
    border-radius: 50%;
    background: var(--blue-300);
    content: "";
}

.glass-panel {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.12);
    box-shadow:
        0 18px 50px rgba(7, 29, 47, 0.18);
    backdrop-filter: blur(18px);
}

.site-footer {
    position: relative;
    margin-top: clamp(4rem, 8vw, 7rem);
    color: rgba(255, 255, 255, 0.78);
    background:
        radial-gradient(
            circle at 15% 10%,
            rgba(45, 183, 176, 0.14),
            transparent 26rem
        ),
        linear-gradient(
            140deg,
            var(--navy-950),
            var(--navy-800)
        );
}

.footer-wave {
    position: absolute;
    top: -48px;
    right: 0;
    left: 0;
    height: 50px;
    overflow: hidden;
}

.footer-wave::before,
.footer-wave::after {
    position: absolute;
    bottom: -22px;
    width: 62%;
    height: 62px;
    border-radius: 50%;
    background: var(--navy-950);
    content: "";
}

.footer-wave::before {
    left: -8%;
    transform: rotate(2deg);
}

.footer-wave::after {
    right: -8%;
    background: var(--navy-800);
    transform: rotate(-2deg);
}

.footer-shell {
    display: grid;
    grid-template-columns: 1.45fr 0.8fr 1.2fr 0.85fr;
    width: min(calc(100% - 2rem), var(--content-width));
    margin: 0 auto;
    padding: clamp(4rem, 7vw, 6rem) 0 2.5rem;
    gap: 2.5rem;
}

.footer-brand {
    max-width: 430px;
}

.footer-brand-name {
    display: inline-block;
    margin-bottom: 1rem;
    color: var(--white);
    font-family:
        "Arial Narrow",
        "Roboto Condensed",
        "Segoe UI",
        Arial,
        sans-serif;
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.035em;
}

.footer-logo {
    color: var(--white);
    text-decoration: none;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.68);
}

.footer-forum-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: var(--radius-pill);
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.88rem;
    font-weight: 850;
    text-decoration: none;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast);
}

.footer-forum-button:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.footer-column h2 {
    margin-bottom: 1rem;
    color: var(--white);
    font-size: 1rem;
    letter-spacing: 0.03em;
}

.footer-column nav {
    display: grid;
    gap: 0.58rem;
}

.footer-column a {
    width: fit-content;
    color: rgba(255, 255, 255, 0.69);
    font-size: 0.88rem;
    text-decoration: none;
    transition:
        color var(--transition-fast),
        transform var(--transition-fast);
}

.footer-column a:hover {
    color: var(--white);
    transform: translateX(3px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    width: min(calc(100% - 2rem), var(--content-width));
    margin: 0 auto;
    padding: 1.25rem 0 1.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.13);
    gap: 1rem;
}

.footer-bottom p {
    margin: 0;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.78rem;
}

.back-to-top {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 900;
    display: grid;
    width: 46px;
    height: 46px;
    border: 0;
    border-radius: 50%;
    place-items: center;
    color: var(--white);
    background:
        linear-gradient(
            135deg,
            var(--navy-800),
            var(--blue-600)
        );
    box-shadow: var(--shadow-md);
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translateY(16px);
    transition:
        opacity var(--transition-standard),
        transform var(--transition-standard);
}

.back-to-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 700ms ease,
        transform 700ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1120px) {
    .brand-tagline {
        display: none;
    }

    .primary-navigation > a {
        padding-inline: 0.55rem;
        font-size: 0.84rem;
    }

    .footer-shell {
        grid-template-columns: 1.4fr 1fr 1fr;
    }

    .footer-column:last-child {
        grid-column: 2 / 4;
    }
}

@media (max-width: 920px) {
    :root {
        --header-height: 78px;
    }

    .site-header.is-scrolled {
        height: 68px;
    }

    .brand-mark {
        width: 52px;
        height: 52px;
    }

    .site-header.is-scrolled .brand-mark {
        width: 46px;
        height: 46px;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .primary-navigation {
        position: fixed;
        top: var(--header-height);
        right: 0;
        left: 0;
        display: grid;
        max-height: calc(100vh - var(--header-height));
        padding: 1rem;
        overflow-y: auto;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        background:
            linear-gradient(
                160deg,
                rgba(7, 29, 47, 0.995),
                rgba(18, 63, 104, 0.995)
            );
        box-shadow:
            0 18px 45px rgba(7, 29, 47, 0.3);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-16px);
        transition:
            opacity var(--transition-standard),
            transform var(--transition-standard);
    }

    .primary-navigation.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .primary-navigation > a {
        justify-content: flex-start;
        min-height: 50px;
        padding: 0.85rem 1rem;
        font-size: 0.98rem;
    }

    .primary-navigation .forum-button {
        justify-content: center;
        margin: 0.5rem 0 0;
    }

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

    .footer-shell {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / 3;
    }

    .footer-column:last-child {
        grid-column: auto;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 16px;
    }

    .header-shell {
        width: min(calc(100% - 1rem), var(--content-width));
    }

    .brand-copy {
        display: none;
    }

    .brand-mark {
        margin-right: 0;
    }

    .content-shell,
    .reading-shell,
    .footer-shell,
    .footer-bottom {
        width: min(calc(100% - 1.25rem), var(--content-width));
    }

    .section {
        padding: 3.5rem 0;
    }

    .section-tight {
        padding: 2.5rem 0;
    }

    .footer-shell {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-brand,
    .footer-column:last-child {
        grid-column: auto;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .back-to-top {
        right: 0.85rem;
        bottom: 0.85rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}