/* ================= GLOBAL DESIGN SYSTEM ================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #020705;
    color: #e2e8f0;
    font-family: 'Quicksand', sans-serif;
    overflow-x: hidden;
    position: relative;
}

/* KHUNG NỀN DI ĐỘNG KỸ THUẬT SỐ - ĐÃ TỐI ƯU CHỐNG LAG */
.parallax-bg-layer {
    position: fixed; /* Đổi thành fixed để cố định nền, trượt chữ lên trên */
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: url('bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
    pointer-events: none;
    
    /* Tăng tốc phần cứng bằng card đồ họa của laptop/điện thoại */
    will-change: transform;
    transform: translateZ(0); 
    
    /* XÓA BỎ LỆNH ANIMATION THỞ GÂY LAG Ở ĐÂY NHA BỒ */
}

@keyframes backgroundBreathe {
    0% { transform: scale(1) translateY(0); filter: brightness(1); }
    100% { transform: scale(1.03) translateY(-5px); filter: brightness(1.08); }
}

/* Reusable Glassmorphism Specification */
.glass-panel {
    background: rgba(9, 29, 23, 0.65);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(45, 212, 191, 0.2);
    border-radius: 26px;
}

/* ================= HORIZONTAL CINEMATIC SLIDER ELEMENT ================= */
.cinema-slider {
    display: flex;
    width: 200vw;
    transition: transform 0.7s cubic-bezier(0.77, 0, 0.175, 1);
}

.museum-room {
    width: 100vw;
    min-height: 100vh;
    will-change: transform;
}

.main-wrapper {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    width: 100%;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    color: #2dd4bf;
    font-size: 2rem;
    margin-bottom: 35px;
}

/* ================= INTERACTION COMPONENTS (BUTTONS) ================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-primary {
    background: #10b981;
    color: #06110d;
    border: none;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
    background: #2dd4bf;
    box-shadow: 0 0 25px rgba(45, 212, 191, 0.7);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px dashed #17b890;
    color: #2dd4bf;
}

.btn-outline:hover {
    border-style: solid;
    background: rgba(23, 184, 144, 0.1);
    color: #fff;
    box-shadow: 0 0 15px rgba(45, 212, 191, 0.3);
}

.btn-back-home {
    background: transparent;
    border: 2px solid #10b981;
    color: #2dd4bf;
    padding: 14px 32px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.btn-back-home:hover {
    background: #10b981;
    color: #06110d;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
    transform: translateX(-3px);
}

/* ================= SECTION 1: HERO CONTAINER ================= */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-content {
    flex: 1.5;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3.2rem;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 20px;
}

.hero-title .highlight {
    color: #17b890;
    text-shadow: 0 0 20px rgba(23, 184, 144, 0.3);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #a3b899;
    margin-bottom: 35px;
}

.hero-ctas {
    display: flex;
    gap: 15px;
}

.hero-mascot {
    flex: 0.8;
    display: flex;
    justify-content: center;
}

.mascot-img {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 30px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(45, 212, 191, 0.2);
    animation: breathing 6s ease-in-out infinite;
}

@keyframes breathing {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.03); }
}

/* ================= INTERACTIVE MEMORY GALLERY CARD SYSTEM (STATIC FLOW) ================= */
.memory-gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    justify-content: center;
    width: 100%;
    padding: 20px 0;
    position: relative;
    z-index: 10;
    transition: all 0.5s ease;
    align-items: start; /* Khóa chiều cao độc lập cho từng card */
}

.memory-card {
    position: relative;
    width: 280px;
    display: flex;
    flex-direction: column;
    background: rgba(9, 29, 23, 0.45);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(45, 212, 191, 0.25);
    border-radius: 24px;
    padding: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    justify-self: center;
    transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease;
    animation: cardFloat 5s ease-in-out infinite alternate;
}

@keyframes cardFloat {
    0% { transform: translateY(0px) rotate(0deg); }
    100% { transform: translateY(-6px) rotate(0.5deg); }
}

.art-frame-wrapper {
    position: relative;
    width: 100%;
    height: 320px;
    border-radius: 18px;
    overflow: hidden;
    flex-shrink: 0;
}

.museum-art {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

/* KHI TƯƠNG TÁC HOVER/CLICK: Đóng băng lơ lửng để tập trung xem thông tin */
.memory-card:hover, .memory-card.expanded {
    animation-play-state: paused;
    border-color: #2dd4bf;
    box-shadow: 0 0 25px rgba(45, 212, 191, 0.4);
}
.memory-card:hover .museum-art {
    transform: scale(1.03);
}

/* CẤU HÌNH BẢNG THÔNG TIN TĨNH NẰM DƯỚI: Co giãn đẩy card kế bên */
.memory-info-panel {
    display: block;
    width: 100%;
    max-height: 0; /* Mặc định ẩn chiều cao về 0 */
    opacity: 0;
    overflow: hidden;
    padding: 0 10px;
    margin-top: 0;
    transition: max-height 0.5s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease, padding 0.5s ease, margin 0.5s ease;
    background: rgba(6, 20, 16, 0.5) !important;
    border: none !important;
    box-shadow: none !important;
}

/* HOVER HOẶC CLICK: Bung rộng chiều cao đẩy các card xung quanh xịch ra */
.memory-card:hover .memory-info-panel, 
.memory-card.expanded .memory-info-panel {
    opacity: 1;
    max-height: 250px; /* Tăng nhẹ để chứa thoải mái cả thanh trái tim bên dưới */
    padding: 15px 10px 5px 10px;
    margin-top: 12px;
}

.system-tag {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.72rem; font-weight: 700;
    text-transform: uppercase; color: #10b981;
    letter-spacing: 1px; display: inline-flex; align-items: center; gap: 5px;
}
.artist-handle {
    font-family: 'Space Grotesk', sans-serif;
    color: #fff; font-size: 1.1rem; font-weight: 700;
    margin: 4px 0;
}
.artist-message { color: #a3b899; font-size: 0.85rem; font-style: italic; line-height: 1.5; }

/* Cyberpunk Corner Cuts */
.cyber-corner {
    position: absolute;
    width: 8px; height: 8px; border: 1px solid #2dd4bf;
    z-index: 5; pointer-events: none; opacity: 0.6;
}
.cyber-corner.top-left { top: 6px; left: 6px; border-right: none; border-bottom: none; }
.cyber-corner.top-right { top: 6px; right: 6px; border-left: none; border-bottom: none; }
.cyber-corner.bottom-left { bottom: 6px; left: 6px; border-right: none; border-top: none; }
.cyber-corner.bottom-right { bottom: 6px; right: 6px; border-left: none; border-top: none; }

.light-scan-bar {
    position: absolute;
    top: -100%; left: 0; width: 100%; height: 30%;
    background: linear-gradient(to bottom, rgba(45, 212, 191, 0) 0%, rgba(45, 212, 191, 0.25) 50%, rgba(45, 212, 191, 0) 100%);
    pointer-events: none; z-index: 3;
}
.memory-card:hover .light-scan-bar { animation: lightScanEffect 1.5s linear infinite; }
@keyframes lightScanEffect { 0% { top: -100%; } 100% { top: 200%; } }

/* ================= SECTION 3: ABOUT ME CARDS ================= */
.about-card {
    padding: 35px;
    display: flex;
    align-items: center;
    gap: 35px;
}

.about-avatar {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    border: 2px solid #10b981;
    object-fit: cover;
}

.about-text p {
    font-size: 1rem;
    line-height: 1.7;
    color: #cbd5e1;
    margin-bottom: 12px;
}
.about-text p:last-child { margin-bottom: 0; }

/* ================= SECTION 4: CHARACTERS GRID ================= */
.char-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.char-card {
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.char-card:hover {
    border-color: #10b981;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
}

.char-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 15px;
    border: 2px solid rgba(45, 212, 191, 0.4);
}

.char-card h3 {
    color: #fff;
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 10px;
}

.char-card p {
    color: #94a3b8;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 20px;
    min-height: 70px;
}

.btn-chat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid #10b981;
    color: #2dd4bf;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-chat:hover {
    background: #10b981;
    color: #06110d;
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

/* ================= SECTION 5: STATS PANEL ================= */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-box {
    padding: 25px;
    text-align: center;
}

.stat-num {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.2rem;
    color: #fff;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: #94a3b8;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.text-green { color: #10b981; }

/* ================= SECTION 6: GUESTBOOK SPACE ================= */
.guestbook-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
}

.guest-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.guest-form input, .guest-form textarea {
    width: 100%;
    padding: 14px;
    background: rgba(6, 17, 13, 0.7);
    border: 1px solid rgba(45, 212, 191, 0.3);
    border-radius: 14px;
    color: #fff;
    font-family: 'Quicksand', sans-serif;
}

.guest-form input:focus, .guest-form textarea:focus {
    outline: none;
    border-color: #2dd4bf;
    box-shadow: 0 0 10px rgba(45, 212, 191, 0.2);
}

.guest-messages {
    max-height: 280px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding-right: 10px;
}

.msg-card {
    border-radius: 18px;
    padding: 15px;
}

.msg-card h4 { color: #2dd4bf; font-size: 0.9rem; margin-bottom: 5px; }
.msg-card p { color: #cbd5e1; font-size: 0.88rem; line-height: 1.4; }
.new-msg { animation: slideIn 0.4s ease-out; }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.guest-messages::-webkit-scrollbar { width: 6px; }
.guest-messages::-webkit-scrollbar-thumb { background: rgba(16, 185, 129, 0.3); border-radius: 10px; }

/* ================= BACKGROUND FX & FLOATING WIDGETS ================= */
.mouse-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(0,0,0,0) 70%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.fireflies-container {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0; left: 0;
    pointer-events: none;
    z-index: 2;
}

.firefly {
    position: absolute;
    width: 5px;
    height: 5px;
    background: #34d399;
    border-radius: 50%;
    box-shadow: 0 0 10px #10b981, 0 0 20px #10b981;
    opacity: 0;
    animation: fly ease-in-out infinite;
}

@keyframes fly {
    0% { opacity: 0; transform: translateY(0) scale(0.8); }
    50% { opacity: 0.6; transform: translateY(-30px) translateX(15px) scale(1.2); }
    100% { opacity: 0; transform: translateY(-60px) scale(0.8); }
}

.floating-chibi {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 99;
    pointer-events: none;
}

.floating-chibi img {
    width: 200px; /* Đã cập nhật kích thước to chuẩn cho bồ */
    height: auto;
    animation: floatChibi 4s ease-in-out infinite;
}

@keyframes floatChibi {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.floating-quote {
    position: fixed;
    bottom: 30px; 
    left: 80px;
    font-size: 0.85rem;
    font-style: italic;
    color: #a7f3d0;
    opacity: 0.6;
    z-index: 99;
    background: rgba(0,0,0,0.4);
    padding: 6px 12px;
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); 
}

.floating-quote.shift {
    left: 280px;
    opacity: 0.8;
}

/* ================= FLOATING LOFI PLAYER WIDGET ================= */
.music-player-widget {
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    background: rgba(9, 29, 23, 0.85);
    border: 1px solid rgba(16, 185, 129, 0.4);
    border-radius: 30px;
    padding: 6px;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    width: 250px;
    overflow: hidden;
}

.music-player-widget.minimized {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.player-toggle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #10b981;
    border: none;
    color: #06110d;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.player-content {
    display: flex;
    align-items: center;
    margin-left: 10px;
    width: 100%;
}

.vinyl-wrapper { width: 34px; height: 34px; flex-shrink: 0; }
.vinyl-disc { width: 100%; height: 100%; border-radius: 50%; border: 2px solid #000; object-fit: cover; }
.vinyl-disc.playing { animation: rotateVinyl 3s linear infinite; }
@keyframes rotateVinyl { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.track-info { display: flex; flex-direction: column; margin-left: 10px; flex-grow: 1; }
.track-title { font-size: 0.8rem; font-weight: 600; color: #fff; }
.track-status { font-size: 0.7rem; color: #a7f3d0; }
.ctrl-btn { background: transparent; border: none; color: #2dd4bf; cursor: pointer; font-size: 0.9rem; padding: 0 10px; }

/* ================= RESPONSIVE VIEWPORTS ================= */
@media (max-width: 768px) {
    .hero-section { flex-direction: column; text-align: center; padding-top: 40px; }
    .hero-title { font-size: 2.4rem; }
    .hero-ctas { justify-content: center; }
    .stats-section { grid-template-columns: repeat(2, 1fr); }
    .about-card { flex-direction: column; text-align: center; }
    .floating-quote, .floating-chibi { display: none; }
    .memory-gallery-container { grid-template-columns: 1fr; }
}

/* ================= HOVER OVERLAYS & LIGHTBOX INTERACTION FX ================= */
/* Lớp phủ tương tác ẩn hiện nút kính lúp khi rà chuột lên ảnh */
.art-hover-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(2, 7, 5, 0.4);
    display: flex; align-items: center; justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 4;
}

/* Khi người dùng rà chuột vào khung ảnh thì hiện lớp phủ lên */
.art-frame-wrapper:hover .art-hover-overlay {
    opacity: 1;
    pointer-events: auto;
}

/* Thiết kế nút kính lúp Cyberpunk phát sáng */
.action-overlay-btn {
    background: rgba(9, 29, 23, 0.85);
    border: 1px solid #2dd4bf;
    color: #2dd4bf;
    width: 50px; height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(45, 212, 191, 0.3);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform: translateY(10px);
}

.art-frame-wrapper:hover .action-overlay-btn {
    transform: translateY(0);
}

.action-overlay-btn:hover {
    background: #2dd4bf;
    color: #06110d;
    box-shadow: 0 0 20px #2dd4bf;
    transform: scale(1.1);
}

/* Hiệu ứng nhịp đập khi di chuột qua nút trái tim */
.like-btn:hover i {
    transform: scale(1.3);
}

/* Hiệu ứng trồi sụt của icon bảng chờ lấp lánh */
@keyframes floatIcon {
    0% { transform: translateY(0) scale(1); filter: drop-shadow(0 0 5px rgba(45, 212, 191, 0.2)); }
    100% { transform: translateY(-8px) scale(1.03); filter: drop-shadow(0 0 15px rgba(45, 212, 191, 0.5)); }
}