/* --- CSS VARIABLES (LIGHT THEME) --- */
:root {
    --racing-red: #ff1801;
    --electric-blue: #007cc7;
    --bg-white: #ffffff;
    --bg-light: #f4f6f8;
    --text-main: #1a1a1a;
    --text-muted: #555555;
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Noto Sans TC', sans-serif;
    --whatsapp-green: #25d366;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-white);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow-x: hidden;
    line-height: 1.6;
}

/* --- NAVIGATION --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--racing-red);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 舊的 .logo 樣式已移除，現在 Logo 由圖片控制 */
.logo-link {
    display: flex; /* 確保圖片能正確顯示 */
    align-items: center;
    text-decoration: none; /* 移除連結下劃線 */
}

.logo-img {
    height: 45px; /* 設定您的 Logo 圖片高度 */
    width: auto; /* 保持圖片比例 */
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.05); /* 鼠標懸停時稍微放大 */
}

.nav-links {
    display: flex;
    gap: 20px;
}

/* Apply nav-btn styles to <a> tags */
.nav-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
    padding: 5px 10px;
    text-decoration: none; /* Add this for <a> tags */
    display: flex; /* Allow <a> to be styled like a button */
    align-items: center;
    justify-content: center;
}

.nav-btn:hover, .nav-btn.active {
    color: var(--racing-red);
}

.download-nav {
    background-color: var(--racing-red);
    color: white !important;
    padding: 8px 20px;
    border-radius: 4px;
    transform: skewX(-15deg);
}

.download-nav span { display: inline-block; transform: skewX(15deg); }
.download-nav:hover {
    background-color: var(--text-main);
    color: white;
}

/* Mobile menu toggle button (hidden by default) */
.menu-toggle {
    display: none; /* Hidden by default on desktop */
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
    z-index: 1001;
}

/* --- WHATSAPP FLOATING BUTTON --- */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: var(--whatsapp-green);
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 35px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 2px 2px 15px rgba(0,0,0,0.3);
    background-color: #1ebd57;
}

/* --- PAGE CONTENT HANDLING --- */
.page-section {
    display: none;
    padding-top: 80px;
    min-height: 100vh;
    animation: fadeIn 0.5s ease-in-out;
}

.page-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- HERO SLIDER STYLES --- */
.hero {
    position: relative;
    padding: 0;
    height: 85vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
}

.slider-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    background-size: cover;
    background-position: center;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.4) 100%);
}

.slide.active { opacity: 1; }

.hero-content {
    position: relative;
    z-index: 2;
    padding: 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 900;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: #e0e0e0;
    max-width: 600px;
    margin: 0 auto 40px auto;
    text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    color: white;
    border: 1px solid white;
    font-size: 24px;
    padding: 15px 20px;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    border-radius: 50%;
}

.slider-arrow:hover {
    background: white;
    color: black;
}

.prev { left: 30px; }
.next { right: 30px; }

/* --- BUTTONS (Applied to both <button> and <a> with these classes) --- */
.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--racing-red);
    color: white;
    text-decoration: none; /* Added for <a> tags */
    font-weight: bold;
    font-size: 1.2rem;
    border: 2px solid var(--racing-red);
    transition: 0.3s;
    transform: skewX(-15deg);
    cursor: pointer;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.2);
}

.cta-button span { display: inline-block; transform: skewX(15deg); }
.cta-button:hover {
    background: white;
    color: var(--racing-red);
}

.btn-secondary {
    background: transparent;
    border-color: white;
    margin-left: 10px;
}
.btn-secondary:hover {
    background: white;
    color: var(--text-main);
    border-color: white;
}

/* --- CONTAINER & CARDS --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-main);
    margin-bottom: 15px;
}

/* 課程專用：雙欄 (1fr 1fr) */
.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
    align-items: start;
}

.split-container {
    display: flex;           /* 開啟並排 */
    align-items: center;     /* 垂直置中 */
    gap: 40px;               /* 圖文間距 */
    margin-bottom: 50px;     /* 每一大行之間的距離 */
}

.split-container:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.split-image,
.split-text {
    flex: 1;                 /* 兩個區塊平分空間 (1:1) */
    min-width: 0;
}
.split-image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.split-container:nth-child(even) {
flex-direction: row-reverse;
}


/* 首頁核心價值專用：三欄 (3, 1fr) */
.values-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    border-left: 4px solid var(--electric-blue);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.card h3 {
    color: var(--electric-blue);
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.card-date {
    color: var(--racing-red);
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 10px;
    display: block;
}



.event div{
    width: 300px;
    text-align: center;
}

.event img{
    width: 50%;
    border-radius: 10px;
}

.einfo {
    width: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.tag {
    display: inline-block;
    background: rgba(0, 124, 199, 0.1);
    color: var(--electric-blue);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 15px;
    margin-right: 5px;
}

/* --- DOWNLOAD SECTION --- */
.download-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 50px;
    border-top: 5px solid var(--racing-red);
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    border-radius: 8px;
}

.requirements {
    text-align: left;
    background: white;
    padding: 20px;
    margin: 30px 0;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
}
.requirements h4 { margin-bottom: 10px; }
.requirements ul { list-style: none; padding-left: 0; }
.requirements li { color: var(--text-muted); margin-bottom: 5px; }
.requirements li i { color: var(--electric-blue); width: 20px; }

/* --- BOOKING PAGE STYLES --- */
.booking-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-light);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    text-align: center;
}

.booking-container label {
    display: block;
    margin-bottom: 10px;
    font-weight: bold;
    color: var(--text-main);
    font-size: 1.1rem;
}

.booking-container input[type="date"] {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: var(--font-body);
    font-size: 1rem;
    margin-bottom: 20px;
    width: 100%;
    max-width: 300px;
    text-align: center;
    background-color: white;
}

.time-slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 20px;
    margin-bottom: 30px;
    justify-content: center;
}

.time-slot-btn {
    background-color: white;
    border: 1px solid var(--electric-blue);
    color: var(--electric-blue);
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all 0.2s ease;
    width: 100%;
}

.time-slot-btn:hover {
    background-color: var(--electric-blue);
    color: white;
}

.time-slot-btn.active {
    background-color: var(--racing-red);
    border-color: var(--racing-red);
    color: white;
    box-shadow: 0 0 10px rgba(255, 24, 1, 0.4);
}

.booking-form {
    text-align: left;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

.booking-form .form-group {
    margin-bottom: 15px;
}

.booking-form label {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 5px;
}

.booking-form input[type="text"],
.booking-form input[type="tel"],
.booking-form input[type="email"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: var(--font-body);
    font-size: 1rem;
    box-sizing: border-box;
    background-color: white;
}

.booking-form button[type="submit"] {
    width: auto;
    margin-top: 20px;
    transform: skewX(0deg); /* Remove skew for form button */
}
.booking-form button[type="submit"] span {
    transform: skewX(0deg);
}


/* --- FOOTER --- */
footer {
    background: #f8f8f8;
    text-align: center;
    padding: 40px;
    margin-top: 50px;
    border-top: 1px solid #e0e0e0;
    color: var(--text-muted);
}
footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}
.social-links a {
    color: var(--text-muted);
    margin: 0 10px;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}
.social-links a:hover {
    color: var(--electric-blue);
}

/* Responsive */
@media (max-width: 900px) {
    /* Navigation adjustments for mobile */
    nav {
        padding: 15px 20px; /* Adjust nav padding */
        flex-wrap: wrap; /* Allow elements to wrap */
    }
    .nav-links {
        display: none; /* Hide nav links by default on mobile */
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 70px; /* Position below the main nav bar */
        left: 0;
        background: rgba(255, 255, 255, 0.98);
        border-top: 1px solid #eee;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        padding: 10px 0;
        z-index: 999;
        max-height: calc(100vh - 70px);
        overflow-y: auto; /* Enable scrolling for long menus */
    }
    .nav-links.open {
        display: flex; /* Show menu when 'open' class is applied */
    }
    .nav-links .nav-btn {
        width: 100%;
        text-align: left;
        padding: 12px 20px;
        border-bottom: 1px solid #f0f0f0;
    }
    .nav-links .nav-btn:last-child {
        border-bottom: none;
    }
    .menu-toggle {
        display: block; /* Show hamburger icon on mobile */
    }

    /* General page adjustments */
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; margin: 0 auto 20px auto; }
    .hero { height: 60vh; }
    .cta-button, .btn-secondary {
        display: block; /* Make buttons stack vertically */
        width: calc(100% - 40px); /* Full width minus container padding */
        margin: 10px auto; /* Center buttons and add vertical spacing */
        transform: skewX(0deg); /* Remove skew for better readability */
        text-align: center;
        padding: 12px 20px;
    }
    .cta-button span { transform: skewX(0deg); } /* Remove skew from span content */
    .btn-secondary { margin-left: auto; margin-right: auto; } /* Ensure secondary button centers */

    /* Grid containers now always stack on mobile */
    .grid-container, .values-container {
        grid-template-columns: 1fr;
    }
    .container {
        padding: 20px; /* Reduce general container padding */
    }
    .section-header h2 {
        font-size: 2rem;
    }
    .section-header p {
        font-size: 1rem;
    }
    .download-nav { /* Ensure download nav button also removes skew */
        transform: skewX(0deg);
    }
    .download-nav span {
        transform: skewX(0deg);
    }
}

/* Further adjustments for very small phone screens */
@media (max-width: 480px) {
    nav { padding: 10px 15px; }
    .logo-img { height: 35px; } /* Smaller logo on very small screens */
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 0.9rem; }
    .cta-button, .btn-secondary {
        font-size: 1rem;
        padding: 10px 15px;
    }
    .slider-arrow {
        padding: 8px 12px;
        font-size: 18px;
        left: 10px;
        right: 10px;
    }
    .hero-content {
        padding: 10px;
    }
    footer {
        padding: 20px;
        font-size: 0.8rem;
    }
    .social-links a {
        font-size: 1.2rem;
        margin: 0 5px;
    }
}

/* Hide slider arrows on mobile screens */
@media (max-width: 768px) {
    .slider-arrow { display: none; } /* NEW: Hide slider arrows on small screens */
}