/* ==========================================================================
   Parallax Starter - Free HTML CSS Template
   
TemplateMo 612 Parallax Starter

https://templatemo.com/tm-612-parallax-starter

   ========================================================================== */

/* --- CSS Variables --- */
:root {
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Source Sans 3', sans-serif;
    --white: #ffffff;
    --white-90: rgba(255, 255, 255, 0.9);
    --white-70: rgba(255, 255, 255, 0.7);
    --white-40: rgba(255, 255, 255, 0.4);
    --white-20: rgba(255, 255, 255, 0.2);
    --nav-bg: rgba(0, 0, 0, 0.25);
    --nav-bg-scrolled: rgba(0, 0, 0, 0.85);
    --transition-smooth: 0.3s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    color: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* --- Navigation --- */
#templatemo-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: background var(--transition-smooth);
}

#templatemo-nav.scrolled {
    background: var(--nav-bg-scrolled);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--white);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 35px;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 2.5px;
    color: var(--white-70);
    transition: color var(--transition-smooth), opacity var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--white);
}

/* Mobile Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all var(--transition-smooth);
}

/* --- Parallax Sections --- */
.parallax-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Parallax Background Image Layer
   Height is 200% and starts at top: -50% to give
   maximum room for large vertical translations */
.parallax-bg {
    position: absolute;
    top: -50%;
    left: 0;
    width: 100%;
    height: 200%;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    will-change: transform;
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 0;
}

/* Dark Overlay */
.parallax-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.42);
    z-index: 1;
}

.parallax-overlay.overlay-dark {
    background: rgba(0, 0, 0, 0.55);
}

.parallax-overlay.overlay-medium {
    background: rgba(0, 0, 0, 0.50);
}

/* Content Layer */
.section-content {
    position: relative;
    z-index: 2;
    max-width: 960px;
    width: 100%;
    padding: 100px 30px;
    text-align: center;
}

/* --- Typography --- */
.section-title {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: clamp(36px, 6vw, 64px);
    letter-spacing: 8px;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
}

/*Them phan email chinh font----tungnt*/
.section-email {
    font-family: var(--font-heading);
    font-weight: 150;
    font-size: clamp(18px, 3vw, 32px);
    letter-spacing: 4px;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.email-icon {
    margin-bottom: 20px;
    opacity: 0.85;
}

/*Hết phần email chinh font----tungnt*/

.hero-title {
    font-weight: 400;
    letter-spacing: 12px;
}

.section-subtitle {
    font-family: var(--font-body);
    font-size: clamp(13px, 1.6vw, 16px);
    letter-spacing: 4px;
    color: var(--white-70);
    margin-bottom: 40px;
}

.caps {
    text-transform: uppercase;
}

.content-block {
    max-width: 680px;
    margin: 0 auto;
}

.content-block p {
    font-size: 17px;
    color: var(--white-90);
    margin-bottom: 20px;
    line-height: 1.85;
}

/* --- Hero Button --- */
.btn-scroll {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--white);
    border: 1px solid var(--white-40);
    padding: 14px 45px;
    transition: all var(--transition-smooth);
}

.btn-scroll:hover {
    background: var(--white);
    color: #111;
    border-color: var(--white);
}

/* --- About Columns --- */
.unsplash-credit {
    font-size: 14px;
    color: var(--white-40);
    margin-top: 25px;
    letter-spacing: 1px;
}

.unsplash-credit a {
    color: var(--white-70);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.about-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.about-col {
    background: rgba(0, 0, 0, 0.4);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.about-thumb {
    overflow: hidden;
    width: 120px;
    height: 120px;
    border-radius: 8px;
}

.about-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumb-top-left {
    float: left;
    margin: 0 20px 15px 0;
}

.about-thumb-wide {
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 2 / 1;
    border-radius: 8px;
    margin-bottom: 20px;
}

.about-thumb-wide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-col p {
    font-size: 16px;
    color: var(--white-90);
    margin-bottom: 20px;
    line-height: 1.85;
}

.about-col p:last-child {
    margin-bottom: 0;
}

.about-col a {
    color: var(--white);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* --- Services Grid --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    margin-top: 50px;
}

.service-item {
    text-align: center;
}

.service-icon {
    margin-bottom: 20px;
    opacity: 0.85;
}

.service-item h3 {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 3px;
    margin-bottom: 12px;
    color: var(--white);
}

.service-item p {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--white-70);
    line-height: 1.9;
}

/* --- Games Grid --- */
/* --- tungnt copy tu Gemini ---------------------------------------- */
.games-section {
    position: relative;
    /* Anh nhớ đổi dòng dưới đây thành link ảnh nền dàn máy tính thực tế của anh nhé */
    background-image: url('images/background-hinh-dan-may-tinh.jpg'); 
    background-size: cover;
    background-position: center;
    color: #ffffff;
    font-family: var(--font-heading);
    padding: 80px 20px;
    text-align: center;
  }

  /* Lớp phủ tối (Overlay) để chữ và hình nổi bật hơn trên nền ảnh */
  .games-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1;
  }

  .games-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
  }

  .games-header .main-title {
    font-size: 4rem;
    letter-spacing: 5px;
    margin-bottom: 10px;
    font-weight: 300;
  }

  .games-header .sub-title {
    font-size: 1rem;
    letter-spacing: 3px;
    color: #cccccc;
    margin-bottom: 60px;
  }

  .games-grid {
    display: flex;
    justify-content: space-between;
    gap: 40px;
  }

  .game-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer; /* Đổi con trỏ chuột thành hình bàn tay khi chỉ vào game */
  }

  .game-icon {
    height: 80px; /* Tăng chiều cao một chút để chứa ảnh thoải mái hơn */
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden; /* Giữ ảnh không tràn ra ngoài khi phóng to */
  }

  /* CSS cho ảnh game và hiệu ứng chuyển động */
  .game-img {
    max-width: 100%;
    max-height: 80px; 
    object-fit: contain;
    transition: transform 0.3s ease; /* Hiệu ứng mượt mà kéo dài 0.3 giây */
  }

  /* Hiệu ứng phóng to ảnh khi di chuột vào phần game-item */
  .game-item:hover .game-img {
    transform: scale(1.15); /* Phóng to ảnh lên 115% */
  }

  .game-title {
    font-size: 1.5rem;
    letter-spacing: 2px;
    margin-bottom: 15px;
    transition: color 0.3s ease;
  }

  /* Hiệu ứng đổi màu chữ tiêu đề khi di chuột */
  .game-item:hover .game-title {
    color: #ff4d4d; /* Đổi sang màu đỏ nhạt, anh có thể đổi mã màu tùy ý */
  }

  .game-desc {
    font-size: 0.9rem;
    color: #aaaaaa;
    line-height: 1.6;
    max-width: 250px;
  }

  /* Reponsive cho điện thoại: Chuyển thành 1 cột dọc */
  @media (max-width: 768px) {
    .games-grid {
      flex-direction: column;
    }
    .game-item {
      margin-bottom: 40px;
    }
  }

/* --- PHẦN ĐỊNH DẠNG CSS CHO POPUP (MODAL) --- */
  .modal-overlay {
    display: none; /* Ẩn popup theo mặc định */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85); /* Nền đen mờ */
    backdrop-filter: blur(5px);
  }

  .modal-content {
    background-color: #1a1a1a;
    margin: 15% auto;
    padding: 40px 30px;
    border: 1px solid #444;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    text-align: center;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    color: white;
    font-family: var(--font-heading);
  }

  .close-btn {
    position: absolute;
    top: 10px;
    right: 20px;
    color: #aaaaaa;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
  }

  .close-btn:hover {
    color: #ff4d4d;
  }

  .modal-title {
    font-size: 2rem;
    margin-bottom: 20px;
    letter-spacing: 2px;
  }

  .modal-desc {
    font-size: 1rem;
    margin-bottom: 15px;
    color: #cccccc;
  }

  .play-store-link {
    display: inline-block;
    background-color: #2b2b2b;
    color: #4CAF50; /* Màu xanh lá gợi nhớ Google Play */
    padding: 15px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    word-break: break-all; /* Tránh đường link dài bị tràn khung */
    border: 1px solid #4CAF50;
    transition: all 0.3s;
  }

  .play-store-link:hover {
    background-color: #4CAF50;
    color: white;
  }

/* --- tungnt--Hết phần thêm game grid từ gemini ------------------------ */

/* --- Stats Row --- */
.stats-row {
    display: flex;
    justify-content: center;
    gap: 70px;
    margin-top: 45px;
    padding-top: 40px;
    border-top: 1px solid var(--white-20);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 300;
    letter-spacing: 2px;
    color: var(--white);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--white-70);
}

/* --- Contact Form --- */
.contact-form-wrap {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row {
    display: flex;
    gap: 18px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 300;
    letter-spacing: 0.5px;
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--white-20);
    padding: 16px 20px;
    outline: none;
    transition: border-color var(--transition-smooth);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--white-40);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--white-70);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 4px;
    color: var(--white);
    background: transparent;
    border: 1px solid var(--white-40);
    padding: 16px 45px;
    cursor: pointer;
    transition: all var(--transition-smooth);
    align-self: flex-start;
    text-transform: uppercase;
}

.btn-submit:hover {
    background: var(--white);
    color: #111;
    border-color: var(--white);
}

/* --- Footer --- */
#templatemo-footer {
    background: #111;
    text-align: center;
    padding: 30px 20px;
    font-size: 14px;
    color: var(--white-40);
    letter-spacing: 1px;
}

#templatemo-footer a {
    color: var(--white-70);
    transition: color var(--transition-smooth);
}

#templatemo-footer a:hover {
    color: var(--white);
}

/* --- Scroll Reveal Animation --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===================================
   Responsive
   =================================== */

@media (max-width: 991px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .stats-row {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.95);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        gap: 30px;
        padding: 100px 30px 60px;
        overflow-y: auto;
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s ease;
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 16px;
        letter-spacing: 4px;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Disable parallax on mobile — static bg */
    .parallax-bg {
        top: 0;
        height: 100%;
    }

    .section-title {
        letter-spacing: 4px;
    }

    .hero-title {
        letter-spacing: 6px;
    }

    .section-subtitle {
        letter-spacing: 2px;
    }

    /* tungnt -- thêm section email */
    .section-email {
        letter-spacing: 6px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .about-cols {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

    .stats-row {
        flex-direction: column;
        gap: 30px;
    }

    .form-row {
        flex-direction: column;
    }

    .btn-submit {
        align-self: stretch;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 20px;
    }

    .section-content {
        padding: 80px 20px;
    }

    .section-title {
        letter-spacing: 3px;
    }

    .content-block p {
        font-size: 15px;
    }

    .stat-number {
        font-size: 34px;
    }
}