/* Kome Studio Games - style.css
   Gộp từ style.css + kome.css + classy-nav.css + phần Bootstrap đang dùng. */

/* ── Theme ── */
:root {
    color-scheme: light;
    --accent: #0284c7;
    --bg: #f8fafc;
    --text: #0f172a;
    --muted: #475569;
    --banner-bg: linear-gradient(135deg, #e2e8f0 0%, #f1f5f9 50%, #e0f2fe 100%);
    --banner-title: linear-gradient(135deg, #0284c7 0%, #0f766e 100%);
    --box-bg: rgba(255, 255, 255, .92);
    --box-border: rgba(0, 0, 0, .08);
    --box-shadow: 0 10px 30px rgba(0, 0, 0, .08);
    --card-border: rgba(0, 0, 0, .08);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, .06), 0 1px 3px rgba(0, 0, 0, .04);
    --card-hover: 0 12px 28px rgba(0, 0, 0, .16);
    --header-bg: #fff;
    --header-shadow: 0 4px 20px rgba(0, 0, 0, .08);
    --btn-hover-bg: #0f172a;
    --btn-hover-color: #fff;
    --toggle-bg: rgba(0, 0, 0, .06);
    --toggle-border: rgba(0, 0, 0, .15);
    --top-bg: #0f172a;
    --footer-bg: #eef2f6;
    --footer-border: rgba(0, 0, 0, .08);
    --footer-text: #64748b;
    --footer-link: #1e293b;
    --social-bg: #fff;
    --social-color: #334155;
    --social-border: rgba(0, 0, 0, .12);
    --social-shadow: 0 2px 6px rgba(0, 0, 0, .05);
}

[data-theme="dark"] {
    color-scheme: dark;
    --accent: #00f2fe;
    --bg: #0b0f19;
    --text: #f8fafc;
    --muted: #94a3b8;
    --banner-bg: radial-gradient(circle at 50% 30%, #1e293b 0%, #0b0f19 100%);
    --banner-title: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --box-bg: rgba(15, 23, 42, .92);
    --box-border: rgba(255, 255, 255, .12);
    --box-shadow: 0 10px 30px rgba(0, 0, 0, .6);
    --card-border: rgba(255, 255, 255, .12);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, .5), 0 1px 3px rgba(0, 0, 0, .3);
    --card-hover: 0 12px 30px rgba(0, 0, 0, .8);
    --header-bg: #111827;
    --header-shadow: 0 4px 20px rgba(0, 0, 0, .5);
    --btn-hover-bg: #fff;
    --btn-hover-color: #0b0f19;
    --toggle-bg: rgba(255, 255, 255, .12);
    --toggle-border: rgba(255, 255, 255, .22);
    --top-bg: #1e293b;
    --footer-bg: #050811;
    --footer-border: rgba(255, 255, 255, .08);
    --footer-text: #64748b;
    --footer-link: #cbd5e1;
    --social-bg: rgba(255, 255, 255, .06);
    --social-color: #94a3b8;
    --social-border: rgba(255, 255, 255, .1);
    --social-shadow: none;
}

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

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

html.menu-open { overflow: hidden; }

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font: 400 14px/1.5 "Archivo Narrow", "Arial Narrow", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
}

main { flex: 1 0 auto; }

h1, ul, p { margin: 0; padding: 0; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.icons-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

#top-sentinel {
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 300px;
    pointer-events: none;
}

/* ── Header ── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color .25s, box-shadow .25s;
}

.site-header.is-scrolled {
    background: var(--header-bg);
    box-shadow: var(--header-shadow);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 1140px;
    height: 70px;
    margin: 0 auto;
    padding: 0 15px;
}

.brand { flex-shrink: 0; }
.brand img { width: 130px; height: auto; }

.main-nav ul { display: flex; }

.main-nav a {
    display: block;
    font-weight: 700;
    font-size: 16px;
    text-transform: capitalize;
    color: var(--text);
    transition: color .2s;
}

.main-nav li a { padding: 8px 12px; }
.main-nav li a:hover { color: var(--accent); }

.btn-studio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 18px;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--toggle-border);
    border-radius: 9999px;
    white-space: nowrap;
    text-decoration: none;
    transition: background-color .2s, color .2s, border-color .2s;
}

.btn-studio:hover {
    background: rgba(0, 0, 0, .05);
    border-color: rgba(0, 0, 0, .3);
    color: var(--text);
}

[data-theme="dark"] .btn-studio:hover {
    background: rgba(255, 255, 255, .08);
    border-color: rgba(255, 255, 255, .35);
}

.nav-close,
.nav-backdrop { display: none; }

/* Nút đổi theme */
.theme-toggle {
    position: relative;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--toggle-border);
    background: var(--toggle-bg);
    transition: transform .2s;
}

.theme-toggle svg { display: none; }
[data-theme-mode="light"] .theme-icon-sun,
[data-theme-mode="dark"] .theme-icon-moon,
[data-theme-mode="system"] .theme-icon-system { display: block; }

/* Hamburger (chỉ hiện trên mobile/tablet) */
.nav-toggle {
    display: none;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 26px;
    height: 3px;
    border-radius: 3px;
    background: var(--text);
    transition: transform .25s, opacity .2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Menu ngang (hiển thị tối đa từ màn hình >= 576px) */
@media (min-width: 576px) {
    .main-nav {
        display: flex;
        align-items: center;
        gap: 16px;
        margin-left: auto;
    }

    .main-nav ul {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .main-nav li a {
        padding: 6px 10px;
        font-size: 15px;
    }
}

@media (min-width: 768px) {
    .header-inner {
        height: 85px;
        gap: 16px;
    }

    .main-nav {
        gap: 28px;
    }

    .main-nav ul {
        gap: 8px;
    }

    .main-nav li a {
        padding: 8px 14px;
        font-size: 16px;
    }
}

/* Mobile drawer: chỉ khi màn hình thật sự nhỏ (< 576px) */
@media (max-width: 575px) {
    .btn-studio {
        margin-left: auto;
        padding: 4px 10px;
        font-size: 12px;
    }

    .theme-toggle { margin-left: 0; }
    .nav-toggle { display: inline-flex; }

    .main-nav {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 2;
        width: min(290px, 85vw);
        padding: 70px 0 24px;
        overflow-y: auto;
        overscroll-behavior: contain;
        background: var(--header-bg);
        box-shadow: 0 0 35px rgba(0, 0, 0, .45);
        transform: translateX(-100%);
        visibility: hidden;
        transition: transform .3s ease, visibility 0s .3s;
    }

    .main-nav.is-open {
        transform: none;
        visibility: visible;
        transition: transform .3s ease;
    }

    .main-nav ul { display: block; }

    .main-nav li a {
        padding: 14px 24px;
        border-bottom: 1px solid var(--card-border);
    }

    .nav-close {
        display: block;
        position: absolute;
        top: 14px;
        right: 14px;
        width: 40px;
        height: 40px;
    }

    .nav-close::before,
    .nav-close::after {
        content: "";
        position: absolute;
        top: 19px;
        left: 7px;
        width: 26px;
        height: 2px;
        border-radius: 2px;
        background: var(--text);
        transform: rotate(45deg);
    }

    .nav-close::after { transform: rotate(-45deg); }

    .nav-backdrop {
        display: block;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 1;
        background: rgba(0, 0, 0, .5);
        opacity: 0;
        visibility: hidden;
        transition: opacity .3s, visibility 0s .3s;
    }

    .nav-backdrop.is-open {
        opacity: 1;
        visibility: visible;
        transition: opacity .3s;
    }
}

/* ── Banner ── */
.banner {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 250px;
    overflow: hidden;
    background: var(--banner-bg);
}

.banner-box {
    width: 520px;
    max-width: calc(100% - 30px);
    padding: 22px 16px 16px;
    text-align: center;
    background: var(--box-bg);
    border: 1px solid var(--box-border);
    border-bottom: 0;
    border-radius: 20px 20px 0 0;
    box-shadow: var(--box-shadow);
}

.banner-box h1 {
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: transparent;
    background: var(--banner-title);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.banner-box p {
    margin-top: 6px;
    font-size: 15px;
    color: var(--muted);
}

@media (min-width: 768px) {
    .banner { height: 340px; }
    .banner-box { padding: 30px 20px 20px; }
    .banner-box h1 { font-size: 28px; letter-spacing: 6px; }
}

/* ── Danh sách game ── */
.games {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 12px;
    max-width: 1320px;
    margin: 0 auto;
    padding: 40px 16px;
}

@media (min-width: 576px) { .games { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 16px; } }
@media (min-width: 768px) { .games { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 992px) { .games { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 16px 20px; } }

.game { display: block; padding: 6px; }

.game img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 22%;
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    transition: transform .25s, box-shadow .25s;
}

.game-name {
    display: block;
    padding-top: 10px;
    overflow: hidden;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
}

@media (min-width: 576px) { .game-name { font-size: 15px; } }

@media (hover: hover) {
    a.game:hover img {
        transform: translateY(-4px) scale(1.02);
        box-shadow: var(--card-hover);
    }
}

.game.is-soon { opacity: .75; cursor: default; }

/* ── Footer ── */
.site-footer {
    clear: both;
    padding: 24px 0 20px;
    background: var(--footer-bg);
    color: var(--footer-text);
    border-top: 1px solid var(--footer-border);
    content-visibility: auto;
    contain-intrinsic-size: auto 140px;
}

.footer-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 15px;
    text-align: center;
}

.footer-right { order: 1; }
.footer-left { order: 2; }

.footer-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.footer-nav-links {
    order: 1;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 10px;
}

.footer-copy { order: 2; }

.footer-copy a,
.footer-nav-links a { color: var(--footer-link); transition: color .2s; }
.footer-copy a { font-weight: 700; }
.footer-copy a:hover,
.footer-nav-links a:hover { color: var(--accent); }
.footer-nav-links a:hover { text-decoration: underline; }
.footer-nav-links .sep { opacity: .6; }

.footer-social-links { display: flex; gap: 10px; }

.social-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--social-bg);
    color: var(--social-color);
    border: 1px solid var(--social-border);
    box-shadow: var(--social-shadow);
    transition: transform .2s, background-color .2s, color .2s, border-color .2s;
}

.social-icon-btn svg { width: 16px; height: 16px; fill: currentColor; }

@media (hover: hover) {
    .social-icon-btn:hover { transform: translateY(-2px); }
}

.social-icon-btn.youtube:hover  { background: #f00; color: #fff; border-color: #f00; }
.social-icon-btn.facebook:hover { background: #1877f2; color: #fff; border-color: #1877f2; }
.social-icon-btn.tiktok:hover   { background: #000; color: #00f2fe; border-color: #fe2c55; }
.social-icon-btn.github:hover   { background: #24292e; color: #fff; border-color: #24292e; }
.social-icon-btn.email:hover    { background: #ea4335; color: #fff; border-color: #ea4335; }

@media (min-width: 768px) {
    .footer-wrapper {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-right { order: 2; }
    .footer-left { order: 1; flex-direction: row; flex-wrap: wrap; }
    .footer-nav-links { order: 2; }
    .footer-copy { order: 1; }
}

/* ── Nút lên đầu trang ── */
.to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    z-index: 900;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--top-bg);
    box-shadow: 0 4px 14px rgba(0, 0, 0, .25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .25s, transform .25s, visibility 0s .25s;
}

.to-top::after {
    content: "";
    position: absolute;
    top: 16px;
    left: 15px;
    width: 10px;
    height: 10px;
    border-top: 2px solid #fff;
    border-left: 2px solid #fff;
    transform: rotate(45deg);
}

.to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity .25s, transform .25s;
}

@media (min-width: 768px) {
    .to-top { right: 50px; bottom: 50px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; }
}