/* RESET + base */
:root {
    /* Light theme (default) */
    --bg-gradient: linear-gradient(135deg, #f5f7fa, #e4e8f0, #dfe6f5);
    --text-color: #2d3748;
    --text-muted: #4a5568;
    --primary-color: #4c6ef5;
    --primary-hover: #3b5bdb;
    --secondary-color: #9f7aea;
    --header-bg: rgba(255, 255, 255, 0.95);
    --sidebar-bg: rgba(255, 255, 255, 0.92);
    --content-bg: rgba(255, 255, 255, 0.95);
    --card-bg: #ffffff;
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.05);
    --success-color: #38a169;
    --error-color: #e53e3e;
    --btn-bg: #4c6ef5;
    --btn-text: white;
    --input-bg: #f8fafc;
    --input-border: #e2e8f0;
    --highlight-bg: rgba(76, 110, 245, 0.1);
}

[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #1a202c, #2d3748, #1a365d);
    --text-color: #f7fafc;
    --text-muted: #cbd5e0;
    --primary-color: #5a67d8;
    --primary-hover: #6875f5;
    --secondary-color: #b794f4;
    --header-bg: rgba(26, 32, 44, 0.95);
    --sidebar-bg: rgba(26, 32, 44, 0.92);
    --content-bg: rgba(26, 32, 44, 0.95);
    --card-bg: #2d3748;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --success-color: #48bb78;
    --error-color: #f56565;
    --btn-bg: #5a67d8;
    --btn-text: white;
    --input-bg: #2d3748;
    --input-border: #4a5568;
    --highlight-bg: rgba(90, 103, 216, 0.2);
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg-gradient);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, p {
    margin: 0 0 12px 0;
}

button {
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s ease;
}

/* HEADER */
.account-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.account-header .logo {
    font-size: 20px;
    font-weight: bold;
}

.account-header .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.account-header #btn-logout {
    padding: 8px 16px;
    border: none;
    background: var(--btn-bg);
    border-radius: 8px;
    color: var(--btn-text);
    font-weight: 500;
    transition: background 0.2s ease;
}

.account-header #btn-logout:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* MAIN LAYOUT */
.account-layout {
    display: flex;
    min-height: calc(100vh - 60px);
    margin: 16px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px var(--shadow-color);
}

/* SIDEBAR */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-right: 1px solid var(--border-color);
    transition: width 0.3s ease, background 0.3s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 70px;
}

.sidebar .toggle-btn {
    width: 100%;
    padding: 20px;
    font-size: 18px;
    background: none;
    border: none;
    color: var(--text-color);
    text-align: left;
    opacity: 0.8;
}

.sidebar .toggle-btn:hover {
    opacity: 1;
}

input#avatar-url {
    display: none;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-item {
    padding: 16px 20px;
    margin: 4px 8px;
    border-radius: 8px;
    color: var(--text-color);
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-item .icon {
    font-size: 20px;
    min-width: 24px;
    text-align: center;
}

.sidebar-item:hover {
    background: var(--highlight-bg);
}

.sidebar-item.active {
    background: var(--highlight-bg);
    font-weight: 600;
    color: var(--primary-color);
}

.sidebar.collapsed .sidebar-item .label {
    display: none !important;
}

/* MAIN CONTENT */
.main-content {
    flex: 1;
    padding: 24px;
    background: var(--content-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    box-sizing: border-box;

}

/* TAB MENU NGANG */
.tab-menu {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 18px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    transition: all 0.2s ease;
    font-weight: 500;
}

.tab-btn:hover {
    background: var(--highlight-bg);
    border-color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    font-weight: 600;
}

/* TAB CONTENT */
.tab-content {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 5px 15px var(--shadow-color);
    min-height: 150px;
    transition: background 0.3s ease, box-shadow 0.3s ease;
    box-sizing: border-box;

}

/* RESPONSIVE */
@media (max-width: 768px) {
    .account-layout {
        flex-direction: column;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -280px; /* Start off-screen */
        height: 100vh;
        width: 260px;
        z-index: 1000;
        box-shadow: 2px 0 15px var(--shadow-color);
        transition: left 0.3s ease;
        border-radius: 0 12px 12px 0;
    }

    .sidebar.active {
        left: 0; /* Slide in when active */
    }

    .sidebar.collapsed {
        width: 260px; /* Keep same width when collapsed on mobile */
        left: -280px;
    }

    .sidebar.collapsed.active {
        left: 0;
    }

    .toggle-btn {
        position: fixed;
        left: 10px;
        top: 70px;
        z-index: 1001;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--primary-color);
        color: white;
        box-shadow: 0 2px 10px var(--shadow-color);
        opacity: 0.9;
    }

    .toggle-btn:hover {
        opacity: 1;
    }

    .main-content {
        width: 100%;
        margin-top: 10px;
        padding: 16px;
        box-sizing: border-box;
    }

    /* Prevent body scrolling when sidebar is open */
    body.sidebar-open {
        overflow: hidden;
    }

    /* Overlay when sidebar is active */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        backdrop-filter: blur(2px);
    }

    .sidebar-overlay.active {
        display: block;
    }
    
    /* Footer optimization */
    .footer {
        padding: 12px 10px;
        font-size: 12px;
        margin-top: 16px;
    }

    .footer p {
        margin: 10px 0;
    }

    .footer a {
        display: inline-block;
        margin: 3px 4px;
        padding: 4px 0;
    }
    
    /* Adjust tab menu for mobile */
    .tab-menu {
        gap: 8px;
    }
    
    .tab-btn {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    /* Adjust header for mobile */
    .header {
        padding: 10px 15px;
        flex-wrap: wrap;
    }
    
    .header .logo {
        width: 32px;
        height: 32px;
    }
    
    .header h1 {
        font-size: 18px;
    }
    
    .header .slogan {
        display: none;
    }

    /* Hide the sidebar toggle inside the sidebar on mobile */
    .sidebar .toggle-btn {
        display: none;
    }

    /* Ensure mobile toggle button is displayed on mobile */
    .mobile-toggle-btn {
        display: flex !important; /* Use !important to override any other styles */
    }
}

/* Block nội dung trong tab */
#tab-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px 28px;
    box-shadow: 0 4px 12px var(--shadow-color);
    color: var(--text-color);
    font-size: 15px;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Tiêu đề */
#tab-content h2 {
    font-size: 22px;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 24px;
    font-weight: 600;
}

#tab-content h3 {
    font-size: 18px;
    color: var(--text-color);
    margin-top: 24px;
    margin-bottom: 12px;
    font-weight: 600;
}

/* Input & Form */
#tab-content input[type="text"],
#tab-content input[type="password"],
#tab-content input[type="date"],
#tab-content input[type="file"],
#tab-content input[type="email"],
#tab-content textarea {
    width: 100%;
    max-width: 420px;
    padding: 12px 14px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    margin-bottom: 16px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-size: 14px;
    transition: all 0.2s ease;
}

#tab-content input:focus,
#tab-content textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(76, 110, 245, 0.2);
}

/* Buttons */
#tab-content button {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    margin-top: 8px;
}

#tab-content button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

#tab-content button:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

/* Passcode manager */
.passcode-card {
    background: var(--card-bg);
    border-radius: 18px;
    padding: 28px;
    box-shadow: 0 18px 40px var(--shadow-color);
    max-width: 520px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border: 1px solid var(--border-color);
}

.passcode-header h2 {
    margin-bottom: 6px;
    font-size: 24px;
    font-weight: 700;
}

.passcode-header p {
    margin: 0;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.5;
}

.passcode-body {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.passcode-loading {
    padding: 18px 12px;
    text-align: center;
    color: var(--text-muted);
    font-size: 15px;
}

.passcode-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.passcode-form label {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-muted);
}

.passcode-form input {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    font-size: 20px;
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.4em;
    font-variant-numeric: tabular-nums;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.passcode-form input::placeholder {
    color: var(--text-muted);
    letter-spacing: normal;
}

.passcode-form input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 110, 245, 0.2);
    outline: none;
}

.passcode-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 4px;
}

.passcode-action {
    background: var(--primary-color);
    color: #fff;
    border: none;
    padding: 12px 22px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 12px 20px rgba(76, 110, 245, 0.25);
}

.passcode-action:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.passcode-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px 20px;
    border-radius: 12px;
    font-weight: 600;
}

.passcode-secondary:hover:not(:disabled) {
    background: var(--highlight-bg);
}

.passcode-action:disabled,
.passcode-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.passcode-status {
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    background: var(--input-bg);
}

.passcode-status.success {
    border-color: rgba(56, 161, 105, 0.3);
    background: rgba(56, 161, 105, 0.12);
    color: var(--success-color);
}

.passcode-status.error {
    border-color: rgba(229, 62, 62, 0.35);
    background: rgba(229, 62, 62, 0.1);
    color: var(--error-color);
}

.passcode-status.info {
    border-color: rgba(76, 110, 245, 0.25);
    background: rgba(76, 110, 245, 0.12);
    color: var(--primary-color);
}

.passcode-retry {
    align-self: flex-start;
    border: none;
    background: transparent;
    color: var(--primary-color);
    font-weight: 600;
    padding: 0;
    margin-top: -8px;
}

.passcode-retry:hover {
    text-decoration: underline;
}

/* Thông báo kết quả */
#save-profile-result,
#upload-avatar-result,
#email-verify-result,
#phone-verify-result {
    margin-top: 16px;
    font-weight: 600;
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 6px;
}

#save-profile-result.success,
#upload-avatar-result.success,
#email-verify-result.success,
#phone-verify-result.success {
    color: var(--success-color);
    background: rgba(56, 161, 105, 0.1);
}

#save-profile-result.error,
#upload-avatar-result.error,
#email-verify-result.error,
#phone-verify-result.error {
    color: var(--error-color);
    background: rgba(229, 62, 62, 0.1);
}

/* Pre (ví dụ block Export Data) */
#tab-content pre {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-color);
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    border-radius: 0 0 12px 12px;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: background 0.3s ease, color 0.3s ease;
    flex-direction: row;
    flex-wrap: wrap;
    align-content: center;
}

.header .logo {
    width: 40px;
    height: 40px;
    margin-right: 16px;
    border-radius: 8px;
}

.header h1 {
    font-size: 22px;
    margin: 0;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--primary-color);
}

.header .slogan {
    font-size: 12px;
    color: var(--text-muted);
    margin-left: 12px;
    font-style: italic;
}

.header .typing-hello {
    flex-grow: 1;
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    animation: fadeIn 1s ease;
}

.header .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header .user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
}

.header #btn-logout {
    padding: 8px 16px;
    font-size: 13px;
    border: none;
    border-radius: 8px;
    background: var(--btn-bg);
    color: var(--btn-text);
    cursor: pointer;
    transition: all 0.2s ease;
}

.header #btn-logout:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 20px;
    padding: 4px;
    margin-right: 12px;
    cursor: pointer;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: rotate(30deg);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* User info (hello user + logout) */
.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    margin-top: 0;
    flex-wrap: wrap;
}

.user-name {
    font-weight: 500;
    color: var(--text-color);
}

#btn-logout {
    background: var(--btn-bg);
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--btn-text);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

#btn-logout:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* Typing effect */
@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--primary-color); }
}

.footer {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    padding: 16px 12px;
    margin-top: 24px;
    border-top: 1px solid var(--border-color);
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    line-height: 1.4;
    margin-left: auto;
    margin-right: auto;
    transition: background 0.3s ease, color 0.3s ease;
    box-shadow: 0 -2px 10px var(--shadow-color);
}

.footer p {
    margin: 6px 0;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 13px;
    margin: 0 5px;
    transition: color 0.3s;
}

.footer a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.footer .dmca-badge img {
    width: 90px;
    height: auto;
    margin: 5px auto;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer .dmca-badge img:hover {
    opacity: 1;
}

/* Tables */
#tab-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
    border-radius: 8px;
    overflow: hidden;
}

#tab-content th {
    background-color: var(--highlight-bg);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--primary-color);
}

#tab-content td {
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

#tab-content tr:hover {
    background-color: var(--highlight-bg);
}

/* Welcome box animations */
#welcome-box {
    transition: all 0.3s ease;
}

#welcome-box:hover {
    transform: translateY(-5px);
}

/* Checkbox styling */
#tab-content input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    vertical-align: middle;
    accent-color: var(--primary-color);
}

#tab-content label {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    cursor: pointer;
}

/* Mobile Toggle Button */
.mobile-toggle-btn {
    display: none; /* Hidden by default on desktop */
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.4);
    z-index: 1010;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.mobile-toggle-btn:hover {
    background: var(--primary-hover);
}

@media (max-width: 768px) {
    /* Make mobile toggle button always visible on mobile */
    .mobile-toggle-btn {
        display: flex !important; /* Use !important to override any other styles */
    }
}