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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.login-page {
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
}

.login-container {
    width: 100%;
    padding: 0 24px;
}

.login-card {
    width: 100%;
    max-width: 384px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
    padding: 32px;
    position: relative;
}

/* 主题切换按钮 */
.theme-toggle-login {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition);
}
.theme-toggle-login:hover {
    background: var(--bg-hover);
    color: var(--text);
}
.theme-icon-login {
    display: block;
    width: 16px;
    height: 16px;
}
.theme-icon-login::before {
    content: '';
    display: block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid currentColor;
    clip-path: polygon(50% 0%, 50% 15%, 85% 15%, 85% 50%, 100% 50%, 100% 100%, 0% 100%, 0% 50%, 15% 50%, 15% 15%, 50% 15%);
}
[data-theme="dark"] .theme-icon-login::before {
    border: none;
    background: currentColor;
    clip-path: circle(40% at 50% 50%);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 32px;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--text);
}

.back-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}

.login-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 0;
}

.login-form {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-field label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-field input {
    height: 48px;
    width: 100%;
    padding: 0 24px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    background: var(--input-bg);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-field input::placeholder {
    color: var(--text-subtle);
}

.form-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-ring);
}

.remember-row {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 2px;
    margin-left: 2px;
    font-size: 14px;
    color: var(--text-subtle);
    cursor: pointer;
    user-select: none;
    position: relative;
}

.remember-row input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--card-bg);
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.15s;
    position: relative;
}

.remember-row input[type="checkbox"]:checked {
    background: var(--primary);
    border-color: var(--primary);
}

.remember-row input[type="checkbox"]:checked + span + .check-icon {
    opacity: 1;
}

.check-icon {
    position: absolute;
    left: 3px;
    top: 3px;
    width: 10px;
    height: 10px;
    color: #fff;
    opacity: 0;
    transition: opacity 0.15s;
    pointer-events: none;
}

.login-btn {
    height: 48px;
    width: 100%;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    letter-spacing: 0.5px;
}

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

.login-btn:active {
    opacity: 0.85;
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-msg {
    text-align: center;
    font-size: 13px;
    padding: 10px;
    border-radius: 6px;
    display: none;
}

.form-msg-success {
    display: block;
    background: var(--success-50);
    color: var(--success-700);
}

.form-msg-error {
    display: block;
    background: var(--danger-50);
    color: var(--danger-700);
}