:root {
    --accent: #f59e0b;      
    --accent-hover: #d97706;
    --dark-bg: #0f172a;     
    --panel-bg: rgba(15, 23, 42, 0.85); 
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    
    --font-ui: 'Inter', sans-serif;
    --font-body: 'Lora', serif;
}

html, body {
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    height: 100% !important;
    background-color: var(--dark-bg);
    color: var(--text-main);
    overflow: hidden !important;
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Ép khung giao diện tuyệt đối chống CMS */
#interactive-wrapper {
    position: absolute !important;
    top: 0 !important; left: 0 !important; right: 0 !important; bottom: 0 !important;
    width: 100% !important;
    height: 100% !important;
    overflow: hidden !important;
}

/* ================= INTRO SCREEN ================= */
#intro-screen {
    position: absolute !important;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 100;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s;
}
#intro-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(15,23,42,0.6), rgba(15,23,42,0.95));
}
.intro-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 40px;
}
.intro-kicker {
    font-family: var(--font-ui);
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    display: block;
}
.intro-title {
    font-family: var(--font-ui);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    color: #ffffff;
    margin-bottom: 30px;
    letter-spacing: -1px;
}
.title-line-1 {
    display: block;
    white-space: nowrap;
}
.intro-desc {
    font-family: var(--font-body);
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-muted);
    margin-bottom: 50px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}
.btn-start {
    padding: 16px 45px;
    font-family: var(--font-ui);
    font-size: 1.1rem;
    font-weight: 600;
    background-color: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
    border-radius: 50px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.btn-start:hover {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
    transform: translateY(-2px);
}

/* ================= MAP CONTAINER ================= */
#main-container {
    position: absolute !important;
    top: 0; left: 0;
    width: 100%; height: 100%;
    display: block; /* Sửa flex thành block để tương thích cao hơn */
    visibility: hidden;
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--dark-bg);
}

#map {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    filter: saturate(0.7) contrast(1.1) brightness(0.85); 
}

/* Map Labels */
.map-label {
    font-family: var(--font-ui);
    font-size: 1.1rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: 0px 2px 4px rgba(0,0,0,0.8);
    pointer-events: none;
    white-space: nowrap;
}
.lbl-vn { 
    font-size: 1.6rem; 
    color: #fff; 
    letter-spacing: 6px;
}

/* Checkpoints */
.checkpoint {
    width: 12px;
    height: 12px;
    background-color: var(--dark-bg);
    border: 3px solid var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
}
.checkpoint.active {
    background-color: var(--accent);
    border-color: #fff;
    box-shadow: 0 0 20px var(--accent);
    transform: scale(1.5);
}

/* ================= INFO PANEL ================= */
#info-panel {
    position: absolute;
    right: 0; top: 0; bottom: 0;
    width: 460px;
    max-width: 100%;
    background: var(--panel-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid rgba(255,255,255,0.05);
    padding: 60px 40px 120px 40px; 
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.8s cubic-bezier(0.19, 1, 0.22, 1);
    z-index: 30;
    overflow-y: auto;
    box-shadow: -20px 0 50px rgba(0,0,0,0.5);
}
#info-panel.open {
    transform: translateX(0);
}

#btn-close-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    width: 40px;
    height: 40px;
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    transition: color 0.3s, transform 0.3s;
}
#btn-close-panel:hover {
    color: #fff;
    transform: scale(1.1);
}

.step-title {
    font-family: var(--font-ui);
    color: #fff;
    font-size: 1.6rem;
    font-weight: 700;
    margin-top: 20px;
    margin-bottom: 25px;
    line-height: 1.3;
    letter-spacing: -0.5px;
}
.step-content {
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-muted);
}
.step-content p {
    margin-bottom: 18px;
}
.step-content b {
    font-family: var(--font-ui);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-top: 25px;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 5px;
}
.step-content i {
    color: var(--accent);
    font-style: italic;
    display: inline-block;
    margin-top: 10px;
    font-size: 0.95rem;
}
.step-img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    object-fit: cover;
    margin: 30px 0;
    display: block;
    border: 1px solid rgba(255,255,255,0.05);
}
.case-block {
    margin-top: 35px;
    padding-top: 5px;
}

/* ================= UI CONTROLS ================= */
#controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 40;
}
.nav-btn {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    width: 50px; height: 50px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-btn:hover:not(:disabled) { 
    background: rgba(255,255,255,0.1); 
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px); 
}
.nav-btn:disabled { 
    opacity: 0.2; 
    cursor: not-allowed; 
}

#btn-start-moving {
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    padding: 14px 35px;
    background-color: var(--accent);
    color: var(--dark-bg);
    border: none;
    border-radius: 4px;
    font-family: var(--font-ui);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 1px;
    cursor: pointer;
    z-index: 50;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: none; 
    text-transform: uppercase;
}
#btn-start-moving:hover {
    background-color: #fff;
    transform: translateX(-50%) translateY(-2px);
}

#btn-home {
    position: absolute;
    top: 25px; left: 25px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-muted);
    padding: 8px 20px;
    border-radius: 4px;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    z-index: 40;
    backdrop-filter: blur(5px);
    transition: all 0.3s;
}
#btn-home:hover { 
    border-color: #fff;
    color: #fff;
    background: rgba(255,255,255,0.05);
}

.map-hint {
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.5);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    letter-spacing: 1px;
    pointer-events: none;
    z-index: 40;
    text-transform: uppercase;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.3); }

@media (max-width: 768px) {
    .intro-title { font-size: 2.5rem; }
    .title-line-1 { white-space: normal; } 
    .intro-desc { font-size: 1rem; padding: 0 15px; }
    #info-panel { width: 100%; border-left: none; padding: 40px 25px 100px 25px; }
    .map-hint { display: none; }
}