/* Refined Neo-Brutalism UI */
:root {
    --background: #f4f1ea; /* Warm off-white */
    --text-color: #000000;
    --border-thickness: 3px;
    --shadow-offset: 6px;
    --accent-primary: #3dff8a; /* Vibrant Green */
    --accent-secondary: #fff8b3; /* Light Yellow */
    --font-main: 'Space Grotesk', sans-serif;
}

body {
    font-family: var(--font-main);
    font-weight: 500;
    margin: 0;
    padding: 0;
    background-color: var(--background);
    color: var(--text-color);
}

.app-container {
    display: flex;
    height: 100vh;
}

.app-menu {
    width: 280px;
    flex-shrink: 0;
    background-color: var(--background); /* Giữ màu nền hiện có */
    border-right: var(--border-thickness) solid var(--text-color);
    padding: 0 25px 25px 25px; /* Adjust padding */
    display: flex;
    flex-direction: column;
    height: 100vh;
    box-sizing: border-box;
}

.menu-header {
    flex-shrink: 0;
    padding-top: 25px; /* Add padding back to the header */
}

.menu-items-container {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 15px; /* Space for the scrollbar */
}

/* Custom scrollbar for webkit browsers */
.menu-items-container::-webkit-scrollbar {
    width: 8px;
}
.menu-items-container::-webkit-scrollbar-track {
    background: transparent;
}
.menu-items-container::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.2);
    border-radius: 4px;
}
.menu-items-container::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0,0,0,0.4);
}

.logo-frame {
    margin: 0 auto 20px auto; /* Reduced margin */
    border: var(--border-thickness) solid var(--text-color);
    background-color: #fff;
    padding: 10px; /* Reduced padding */
    border-radius: 8px;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
}

.app-logo {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px; /* Optional: slightly round the image corners inside the frame */
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 12px; /* Reduced gap */
    margin-bottom: 25px; /* Reduced margin */
}

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 38px; /* Reduced size */
    height: 38px; /* Reduced size */
    color: var(--text-color);
    text-decoration: none;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    box-shadow: 4px 4px 0px var(--text-color);
    transition: all 0.15s ease-out;
    background-color: #fff;
}

.social-links a:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--text-color);
}

.social-links a:active {
    transform: translate(4px, 4px);
    box-shadow: none;
}

.social-links svg {
    width: 20px; /* Reduced icon size */
    height: 20px; /* Reduced icon size */
    fill: currentColor;
}

.social-links a[title="Zalo"] {
    font-weight: 700;
    font-size: 1.2em; /* Adjusted font size */
    line-height: 1;
}

.search-input {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 15px; /* Reduced margin */
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    background-color: #ffffff;
    font-family: var(--font-main);
    font-size: 1em;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    box-sizing: border-box; /* Ensure padding doesn't affect width */
    transition: all 0.15s ease-out;
}

.search-input:focus {
    outline: none;
    background-color: var(--accent-secondary);
    box-shadow: 4px 4px 0px var(--text-color);
}

.menu-button {
    display: flex; /* Use flexbox for alignment */
    align-items: center; /* Center text vertically */
    width: 100%;
    min-height: 45px; /* Set a minimum height */
    padding: 10px 15px; /* Adjust padding */
    margin-bottom: 16px;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    background-color: #ffffff;
    color: var(--text-color);
    text-align: left;
    font-size: 0.9em;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    transition: all 0.15s ease-out;
    line-height: 1.4; /* Increase line-height for readability */
    white-space: normal; /* Allow text to wrap */
    overflow-wrap: break-word; /* Break long words if necessary */
}


.menu-button:hover {
    background-color: var(--accent-secondary);
    transform: translate(-2px, -2px);
    box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px) 0px var(--text-color);
}

.menu-button:active {
    transform: translate(var(--shadow-offset), var(--shadow-offset));
    box-shadow: none;
}

.menu-button.active {
    background-color: var(--accent-primary);
    color: var(--text-color);
    transform: translate(0, 0);
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
}

.content-frame {
    flex-grow: 1;
    padding: 25px;
    padding-left: 0;
    position: relative; /* Thêm để định vị nút con */
}

#fullscreen-btn {
    position: absolute;
    top: 40px; /* Di chuyển xuống 1 chút */
    right: 45px; /* Di chuyển vào trong lề phải */
    z-index: 10;
    width: 40px;
    height: 40px;
    background-color: var(--accent-primary); /* Làm cho nó nổi bật */
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 4px 4px 0px var(--text-color);
    transition: all 0.15s ease-out;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color); /* Thêm màu cho SVG kế thừa */
}

#fullscreen-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--text-color);
}

#fullscreen-btn:active {
    transform: translate(4px, 4px);
    box-shadow: none;
}

#fullscreen-btn svg {
    width: 24px;  /* Tăng kích thước icon một chút */
    height: 24px; /* Tăng kích thước icon một chút */
}


#app-frame {
    width: 100%;
    height: 100%;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    background-color: #ffffff;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    transition: opacity 0.3s ease-in-out;
}

#app-frame.loading {
    opacity: 0;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%, 150%);
    padding: 12px 25px;
    background-color: var(--text-color);
    color: var(--background);
    border-radius: 8px;
    border: var(--border-thickness) solid var(--text-color);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    font-size: 1em;
    font-weight: 700;
    z-index: 1000;
    transition: transform 0.4s ease-in-out;
    visibility: hidden;
}

.toast.show {
    transform: translate(-50%, 0);
    visibility: visible;
}

/* Keyframe Animations */
@keyframes slideUpFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Styles */
.hamburger-menu {
    display: none; /* Hidden by default on desktop */
    position: absolute;
    top: 25px;
    left: 25px;
    width: 40px;
    height: 40px;
    background-color: var(--accent-primary);
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    z-index: 1001; /* Above menu */
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    transition: all 0.15s ease-out;
    justify-content: center;
    align-items: center;
}

.hamburger-menu:hover {
    transform: translate(-2px, -2px);
    box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px) 0px var(--text-color);
}

.hamburger-menu:active {
    transform: translate(var(--shadow-offset), var(--shadow-offset));
    box-shadow: none;
}

.hamburger-icon {
    display: block;
    width: 24px;
    height: 3px;
    background-color: var(--text-color);
    position: relative;
    transition: background-color 0.15s ease-out;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    position: absolute;
    transition: transform 0.15s ease-out;
}

.hamburger-icon::before {
    top: -8px;
}

.hamburger-icon::after {
    top: 8px;
}

/* Animation for opening/closing */
.hamburger-menu.active .hamburger-icon {
    background-color: transparent;
}

.hamburger-menu.active .hamburger-icon::before {
    transform: translateY(8px) rotate(45deg);
}

.hamburger-menu.active .hamburger-icon::after {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .app-menu {
        position: fixed;
        top: 0;
        left: -100%; /* Hidden off-screen */
        width: 100%;
        max-width: 300px; /* Max width for menu on mobile */
        height: 100vh;
        padding: 25px;
        border-right: none;
        border-bottom: var(--border-thickness) solid var(--text-color);
        box-shadow: var(--shadow-offset) 0px var(--shadow-offset) var(--text-color);
        transition: left 0.3s ease-in-out;
        z-index: 1000;
    }

    .app-menu.open {
        left: 0; /* Slide in */
    }

    .hamburger-menu {
        display: flex; /* Show on mobile */
    }

    .content-frame {
        padding: 25px;
        padding-top: 80px; /* Make space for hamburger menu */
        width: 100%;
        box-sizing: border-box;
    }

    #app-frame {
        height: calc(100vh - 105px); /* Adjust height for mobile */
    }
}

/* Đảm bảo menu hiển thị đúng trên desktop */
@media (min-width: 769px) {
    .app-menu {
        display: flex !important; /* Đảm bảo menu luôn hiển thị trên desktop */
    }

    .hamburger-menu {
        display: none; /* Ẩn hamburger trên desktop */
    }
}

/* --- Styles for Collapsible Menu Categories --- */
.menu-category-header {
    font-weight: 700;
    font-size: 1.1em;
    padding: 12px 10px;
    margin-top: 15px;
    margin-bottom: 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    background-color: var(--accent-secondary);
    box-shadow: 4px 4px 0px var(--text-color);
    transition: all 0.15s ease-out;
}

.menu-category-header:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--text-color);
}

.menu-category-header::after {
    content: '▼'; /* Down arrow for collapsed */
    font-size: 0.8em;
    transition: transform 0.2s ease-in-out;
}

.menu-category-header.expanded::after {
    transform: rotate(180deg); /* Up arrow for expanded */
}

.menu-category-header.locked {
    background-color: #f0f0f0; /* A more muted color for locked state */
    color: #888;
}

.menu-category-header.locked::before {
    content: '🔒';
    margin-right: 8px;
}

.menu-category-header.unlocked {
    background-color: var(--accent-primary);
}

.menu-app-container {
    padding-left: 10px; /* Indent app buttons */
    border-left: 2px dashed rgba(0,0,0,0.2);
    margin-left: 10px;
    /* display: none; /* Hidden by default, controlled by JS */
}

.menu-item-placeholder {
    padding: 10px;
    font-style: italic;
    color: #777;
    text-align: center;
}

/* --- Styles for Password Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.visible {
    visibility: visible;
    opacity: 1;
}

.modal {
    background-color: var(--background);
    padding: 25px 35px;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    width: 90%;
    max-width: 400px;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.visible .modal {
    transform: scale(1);
}

.modal h3 {
    margin-top: 0;
    font-size: 1.5em;
}

.modal p {
    margin-bottom: 20px;
    font-size: 1em;
}

.modal-input {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    background-color: #ffffff;
    font-family: var(--font-main);
    font-size: 1em;
    box-sizing: border-box;
    box-shadow: inset 3px 3px 0px rgba(0,0,0,0.1);
}

.modal-input:focus {
    outline: none;
    background-color: var(--accent-secondary);
}

.modal-error {
    color: #e53935;
    font-weight: 700;
    height: 20px;
    margin-bottom: 15px;
}

.modal-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.modal-button {
    flex-grow: 1;
    padding: 12px 18px;
    border: var(--border-thickness) solid var(--text-color);
    border-radius: 8px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--text-color);
    transition: all 0.15s ease-out;
}

.modal-button.submit {
    background-color: var(--accent-primary);
}

.modal-button.cancel {
    background-color: #f0f0f0;
}

.modal-button:hover {
    transform: translate(-2px, -2px);
    box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px) 0px var(--text-color);
}

.modal-button:active {
    transform: translate(var(--shadow-offset), var(--shadow-offset));
    box-shadow: none;
}