/* sử dụng Ai để săp sếp đinh hình code sạch hơn ko dùng để viết :)  */
/* ==========================================================================
   1. Biến CSS (dễ chỉnh sửa sau này)
   ========================================================================== */
:root {
    --primary: #00eeff;
    --primary-gradient: linear-gradient(#00eeff, #00ff15);
    --accent: #ff0000;
    --text: white;
    --bg-dark: black;
    --gray: gray;
    --highlight: skyblue;
    --button: lightgreen;
    --purple-title: darkviolet;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
}

/* ==========================================================================
   3. Typography & Links
   ========================================================================== */
a {
    text-decoration: none;
    color: inherit;
}

h1 {
    text-align: center;
}

/* ==========================================================================
   4. Menu
   ========================================================================== */
#menu-head {
    display: flex;
    justify-content: center;
    background-color: var(--gray);
    font-size: 2.5rem;
    gap: 1rem;
    padding: 1rem 0;
}

.item-menu {
    color: var(--primary);
    padding: 0.5rem 1vw;
    background: var(--primary-gradient) no-repeat left bottom / 0 2px;
    transition: background-size 0.6s ease, color 0.3s ease;
}

.item-menu:hover {
    color: var(--accent);
    background-size: 100% 3px;
}

/* ==========================================================================
   5. Images - Zoom hover dùng transition (ổn định nhất)
   ========================================================================== */
img {
    border-radius: 5%;
    display: block;
    max-width: 100%;
    transition: transform 0.4s ease;
    transform: scale(1);
}

img:hover {
    transform: scale(1.08);   /* nhẹ nhàng hơn 1.1, ít vỡ layout */
}

/* ==========================================================================
   6. Sections & Animations xuất hiện
   ========================================================================== */
.section {
    margin: 0 auto 8vh;
    min-height: 50vh;
    max-width: 1400px;
    padding: 0 2vw;
    border-radius: 20px;
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Banner */
#banner {
    margin: 3vh auto;
    width: 98vw;
    max-width: 1800px;
    height: 25vh;
    border: 2px solid #B0000C;
    border-radius: 1vw;
    overflow: hidden;
    animation: appear 2s ease-out forwards;
}

#img-banner {
	border-radius: 0%;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes appear {
    from { opacity: 0; transform: translateY(-30px); }
    to   { opacity: 1; transform: translateY(0); background-color: blue; }
}

/* Text chạy */
#bracket {
    background: var(--bg-dark);
    overflow: hidden;
    white-space: nowrap;
}

#text-run {
    display: inline-block;
    color: var(--highlight);
    padding: 1rem 0;
    animation: run 25s linear infinite;
}

@keyframes run {
    0%   { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

/* ==========================================================================
   7. Nội dung chính (flex layouts)
   ========================================================================== */
#more-infor,
#sug-system,
#bos {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    align-items: center;
}

.content1,
.content2,
#text-bos,
.img-bos {
    flex: 1 1 300px;
}

.content1 {
    max-width: 45%;
}

.content2 {
    max-width: 55%;
    padding: 1rem;
}

.content1 img {
    border-radius: 20px;
    width: 100%;
}

/* Boss section */
#img-bos {
    width: 100%;
    height: auto;
    max-height: 40vh;
    object-fit: cover;
    border-radius: 12px;
}

/* ==========================================================================
   8. Button tải game
   ========================================================================== */
.but {
    background-color: var(--button);
    border: none;
    border-radius: 12px;
    padding: 1rem 3rem;
    font-size: 2.8rem;
    color: white;
    cursor: pointer;
    animation: float 3s ease-in-out infinite;
    transition: all 0.4s ease;
}

.but:hover {
    transform: translateY(-6px);
    background-color: var(--accent);
    color: aqua;
    box-shadow: 0 10px 25px rgba(255,0,0,0.4);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-12px); }
}

/* ==========================================================================
   9. Game items (FromSoftware)
   ========================================================================== */
#SWgame {
    text-align: center;
    padding: 2rem 0;
}

.item {
    display: inline-block;
    width: 20%;
    min-width: 200px;
    margin: 1.2rem;
    background: var(--gray);
    border: 2px solid var(--text);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.item img {
    width: 100%;
    height: 70%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
}

.item:hover {
    transform: scale(1.08);
    margin: 1.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.6);
}

/* ==========================================================================
   10. Tiêu đề lớn
   ========================================================================== */
#ttle {
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: clamp(6rem, 12vw, 10rem);
    color: var(--purple-title);
    text-align: center;
    margin: 2rem 0;
}
/* ==========================================================================
	11. con trỏ chuột có hình tròn follow
	========================================================================= */
.cursor {
      position: fixed;
      width: 24px;
      height: 24px;
      background: #ff4444;
      border-radius: 50%;
      pointer-events: none;
      z-index: 9999;
      transform: translate(-50%, -50%);
      box-shadow: 0 0 12px #ff4444;
      transition: transform 0.08s;
    }