/* ===================== Tokens ===================== */
:root {
    --color-red: #e02424;
    --color-red-hover: #b71212;
    --color-red-glow: rgba(224, 36, 36, 0.45);
    --color-white: #ffffff;
    --color-bg: #131315;
    --color-bg-panel: #1c1c1f;
    --color-border: rgba(255, 255, 255, 0.12);
    --color-border-strong: rgba(255, 255, 255, 0.18);
    --color-text: #ffffff;
    --color-text-dim: #a8a8ad;
    --color-text-dimmer: #737377;
    --font-display: "Rajdhani", "Inter", sans-serif;
    --font-body: "Inter", sans-serif;
    --header-h: 64px;
    --navbar-bg: rgba(10, 10, 11, 0.55);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }

.text-red { color: var(--color-red); }
.text-white { color: var(--color-white); }

/* ===================== Hero / Header (100vh) ===================== */
.hero {
    position: relative;
    min-height: 100vh;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background-image: url('../img/hero-bg.png');
    background-size: cover;
    background-position: center;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(6,6,8,0.75) 0%, rgba(6,6,8,0.55) 40%, rgba(6,6,8,0.85) 100%);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(20px, 5vw, 64px);
    background-color: var(--navbar-bg);
    border-bottom: 1.5px solid transparent;
    transition: background-color 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, backdrop-filter 0.28s ease;
}

.navbar.is-scrolled {
    background-color: var(--color-bg-panel);
    border-bottom-color: var(--color-border);
    box-shadow: 0 8px 28px var(--navbar-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.navbar__logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: 0.02em;
}

.navbar__logo img{
    display: flex;
    width: 190px;
    align-items: center;
}

.navbar__links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.navbar__link {
    position: relative;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--color-text);
    padding-bottom: 6px;
    transition: color 0.2s ease;
}

.navbar__link:hover { color: var(--color-red); }

.navbar__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    z-index: 30;
}

.navbar__toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-white);
    display: block;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Hero content */
.hero__content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 720px;
    padding: 0 20px;
    margin-top: calc(var(--header-h) * 1);
}

.hero__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.6rem, 7vw, 4.5rem);
    line-height: 1;
    letter-spacing: 0.01em;
    margin: 0 0 18px;
}

.hero__tagline {
    color: var(--color-text-dim);
    font-size: clamp(0.95rem, 1.6vw, 1.05rem);
    line-height: 1.6;
    max-width: 560px;
    margin: 0 auto 32px;
}

.hero__stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    margin-bottom: 28px;
}

.stat {
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat__icon {
    width: 26px;
    height: 26px;
    color: var(--color-red);
    flex-shrink: 0;
}

.stat__number {
    display: block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    line-height: 1.1;
    text-align: left;
}

.stat__label {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    color: var(--color-text-dim);
    text-align: left;
}

.stat__divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.hero__buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    border-radius: 6px;
    border: 1px solid transparent;
    transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn svg { width: 18px; height: 18px; }

.btn:active { transform: translateY(1px); }

.btn--primary {
    background: var(--color-red);
    color: var(--color-white);
}
.btn--primary:hover { background: var(--color-red-hover); }

.btn--outline {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-border);
}
.btn--outline:hover { border-color: var(--color-red); color: var(--color-red); }

.server-ip {
    display: flex;
    align-items: center;
    gap: 14px;
    width: min(100%, 320px);
    margin: 0 auto;
    padding: 14px 18px;
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-white);
    transition: all 0.3s;
}

.server-ip svg { width: 20px; height: 20px; color: var(--color-white); flex-shrink: 0; }

.server-ip__text {
    flex: 1;
    text-align: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.15rem;
}

.server-ip__copy-icon { color: var(--color-text); transition: color 0.2s ease; }
.server-ip:hover .server-ip__copy-icon, .server-ip:hover .server-ip__text { color: var(--color-red); }
.server-ip:hover {border-color: var(--color-red);}

.copy-toast {
    display: block;
    height: 20px;
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--color-red);
    opacity: 0;
    transition: opacity 0.2s ease;
}
.copy-toast.is-visible { opacity: 1; }

.hero__version {
    margin: 18px 0 0;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
}
.hero__version span {
    display: block;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--color-text-dimmer);
    margin-top: 2px;
}

.hero__scroll {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: var(--color-text-dim);
    animation: bounce 2s infinite;
}
.hero__scroll svg { width: 22px; height: 22px; }

@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, 8px); }
}

/* ===================== Game modes ===================== */
.modes {
    background: var(--color-bg);
    padding: 90px clamp(20px, 5vw, 64px);
    border-top: 1px solid var(--color-border);
}

.modes__heading {
    text-align: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    letter-spacing: 0.02em;
    margin: 0 0 48px;
}

.modes__grid {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.mode-card {
    background: var(--color-bg-panel);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.mode-card:hover {
    border-color: var(--color-red);
    box-shadow: 0 0 0 0px var(--color-red), 0 0 42px 6px var(--color-red-glow);
    transform: translateY(-4px);
}

.mode-card__image {
    height: 300px;
    background-size: cover;
    background-position: center;
    background-color: #202024;
    position: relative;
}

.mode-card__body { padding: 24px 28px 30px; }

.mode-card__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.02em;
    margin: 0 0 12px;
}

.mode-card__desc {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    line-height: 1.65;
    margin: 0;
}

/* ===================== Footer ===================== */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-red);
    padding: 56px clamp(20px, 5vw, 64px) 0;
}

.footer__top {
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 40px;
}

.footer__tagline {
    color: var(--color-text-dim);
    font-size: 0.85rem;
    line-height: 1.6;
    margin: 14px 0 18px;
    max-width: 280px;
}

.footer__socials { display: flex; gap: 10px; }

.footer__socials a {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-panel);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-white);
    transition: border-color 0.2s ease, color 0.2s ease;
}
.footer__socials a svg { width: 16px; height: 16px; }
.footer__socials a:hover { border-color: var(--color-red); color: var(--color-red); }

.footer__heading {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    margin: 0 0 4px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-red);
    display: inline-block;
}

.footer__col ul { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }

.footer__col a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-dim);
    font-size: 0.88rem;
    transition: color 0.2s ease;
}
.footer__col a:hover { color: var(--color-red); }
.footer__col a.is-active { color: var(--color-red); }

.inline-icon { width: 15px; height: 15px; flex-shrink: 0; }

.footer__bottom {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    text-align: center;
    color: var(--color-text-dimmer);
    font-size: 0.8rem;
}

/* ===================== Responsive ===================== */
@media (max-width: 860px) {
    .modes__grid { grid-template-columns: 1fr; }
    .footer__top { grid-template-columns: 1fr 1fr; }
    .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
    .navbar__toggle { display: flex; }

    .navbar__links {
        position: fixed;
        inset: 0 0 0 auto;
        width: min(80vw, 300px);
        height: 100vh;
        background: var(--color-bg-panel);
        border-left: 1px solid var(--color-border);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        gap: 28px;
        padding: 40px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 25;
    }

    .navbar__links.is-open { transform: translateX(0); }

    .hero__stats { gap: 18px; }
    .stat__number { font-size: 1.2rem; }
    .hero__buttons { flex-direction: column; width: 100%; }
    .btn { width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
    .footer__top { grid-template-columns: 1fr; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .hero__scroll { animation: none; }
    html { scroll-behavior: auto; }
}

/* Visible keyboard focus */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-red);
    outline-offset: 2px;
}