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

:root {
    /* Dark theme (default) */
    --bg-primary: #0b0e11;
    --bg-secondary: #161a1e;
    --bg-tertiary: #1e2329;
    --bg-card: #1e2329;
    --border-color: #2b3139;
    --text-primary: #eaecef;
    --text-secondary: #848e9c;
    --text-tertiary: #5e6673;
    --accent-primary: #0ecb81;
    --accent-danger: #f6465d;
    --accent-warning: #f0b90b;
    --accent-info: #1890ff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] {
    /* Light theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --bg-card: #ffffff;
    --border-color: #e9ecef;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-tertiary: #adb5bd;
    --accent-primary: #0ecb81;
    --accent-danger: #f6465d;
    --accent-warning: #f0b90b;
    --accent-info: #1890ff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'SF Pro Display', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-brand::before {
    content: "🛡️";
    font-size: 24px;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
}

.navbar-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--accent-primary);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    flex-wrap: nowrap;
}

.navbar-user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    flex-wrap: nowrap;
    white-space: nowrap;
    cursor: pointer;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
}

.navbar-user-info:hover {
    border-color: var(--accent-primary);
}

.navbar-user-email {
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.navbar-user-menu-btn {
    color: var(--text-secondary);
    font-size: 10px;
    transition: color 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.navbar-user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    z-index: 1000;
    overflow: hidden;
}

.dropdown-item {
    display: block;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s ease;
    border: none;
    width: 100%;
    text-align: left;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

.dropdown-item-btn {
    color: var(--accent-danger);
}

.dropdown-item-btn:hover {
    background: rgba(246, 70, 93, 0.1);
    color: var(--accent-danger);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

.navbar-lang-select {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: inherit;
    min-width: 60px;
}

.navbar-lang-select:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.navbar-lang-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.navbar-lang-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.navbar-theme-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.navbar-theme-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.theme-icon {
    font-size: 16px;
    line-height: 1;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 24px 24px;
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-section h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
}

/* Main Content */
.main-content {
    flex: 1;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.page-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    transition: all 0.2s ease;
}

.card:hover {
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.2s ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
}

input::placeholder,
select::placeholder,
textarea::placeholder {
    color: var(--text-tertiary);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

select {
    cursor: pointer;
}

/* Buttons */
.btn {
    background: #10416c;
    color: #FFFFFF;
    border: none;
    padding: 12px 24px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: #577A98;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 203, 129, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-block {
    width: 100%;
}

.btn-danger {
    background: var(--accent-danger);
    color: white;
}

.btn-danger:hover {
    background: #ff5566;
    box-shadow: 0 4px 12px rgba(246, 70, 93, 0.3);
}

/* Loading */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.spinner {
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error Messages */
.error {
    background: rgba(246, 70, 93, 0.1);
    border: 1px solid var(--accent-danger);
    color: var(--accent-danger);
    padding: 12px 16px;
    border-radius: 4px;
    margin: 20px 0;
    font-size: 14px;
}

.field-error {
    color: var(--accent-danger);
    font-size: 12px;
    margin-top: 6px;
    min-height: 18px;
    transition: all 0.2s ease;
}

/* Auth Messages */
.auth-message {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 13px;
    transition: all 0.2s ease;
    min-height: 20px;
    border: 1px solid;
}

.auth-message.success {
    background: rgba(14, 203, 129, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.auth-message.error {
    background: rgba(246, 70, 93, 0.1);
    border-color: var(--accent-danger);
    color: var(--accent-danger);
}

.auth-message.info {
    background: rgba(24, 144, 255, 0.1);
    border-color: var(--accent-info);
    color: var(--accent-info);
}

/* Password Strength */
.password-strength {
    margin-top: 8px;
    font-size: 11px;
    padding: 6px 12px;
    border-radius: 4px;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.password-strength.weak {
    background: rgba(246, 70, 93, 0.1);
    color: var(--accent-danger);
    border: 1px solid var(--accent-danger);
}

.password-strength.medium {
    background: rgba(240, 185, 11, 0.1);
    color: var(--accent-warning);
    border: 1px solid var(--accent-warning);
}

.password-strength.strong {
    background: rgba(14, 203, 129, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

input.error {
    border-color: var(--accent-danger) !important;
    background: rgba(246, 70, 93, 0.05) !important;
}

input.success {
    border-color: var(--accent-primary) !important;
    background: rgba(14, 203, 129, 0.05) !important;
}

/* Policy Pages */
.policy-content {
    max-width: 800px;
    margin: 0 auto;
}

.policy-content h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 16px;
}

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

.policy-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.policy-content ul,
.policy-content ol {
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-left: 24px;
    line-height: 1.8;
}

.policy-content li {
    margin-bottom: 8px;
}

/* History Table */
.history-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 24px;
}

.history-table th,
.history-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.history-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.history-table td {
    color: var(--text-secondary);
    font-size: 14px;
}

.history-table tr:hover {
    background: var(--bg-secondary);
}

.no-data {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }

    .page-header h1 {
        font-size: 24px;
    }

    .card {
        padding: 16px;
    }

    .navbar {
        padding: 0 16px;
    }

    .navbar-user {
        gap: 8px;
    }

    .navbar-user-info {
        gap: 8px;
        padding: 4px 8px;
    }

    .navbar-user-email {
        max-width: 100px;
        font-size: 12px;
    }

    .navbar-nav {
        display: none;
    }

    .navbar-user-dropdown {
        min-width: 160px;
        right: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .history-table {
        font-size: 12px;
    }

    .history-table th,
    .history-table td {
        padding: 8px;
    }
}