/* ============================================
   灵工宝 - 深色主题 (Dark Theme)
   ============================================ */

:root {
    /* 背景色 */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-elevated: #334155;
    --bg-input: #0f172a;
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-placeholder: #64748b;
    
    /* 边框色 */
    --border-color: #334155;
    --border-focus: #f97316;
    
    /* 主题色 */
    --primary: #f97316;
    --primary-light: #fb923c;
    --primary-dark: #ea580c;
    
    /* 功能色 */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --gradient-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    
    /* 阴影 */
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-button: 0 6px 20px rgba(249, 115, 22, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
}

/* 登录容器 */
.login-container {
    width: 100%;
    max-width: 360px;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo {
    font-size: 64px;
    margin-bottom: 16px;
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* 登录卡片 */
.login-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 32px 24px;
    box-shadow: var(--shadow-card);
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 16px;
    color: var(--text-primary);
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-secondary);
}

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

/* 登录按钮 */
.login-btn {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 8px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-button);
}

.login-btn:active {
    transform: translateY(0);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 错误消息 */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    border-radius: 8px;
    padding: 12px;
    color: var(--danger);
    font-size: 14px;
    text-align: center;
    margin-bottom: 16px;
    display: none;
}

.error-message.show {
    display: block;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 密码切换 */
.password-toggle {
    position: relative;
}

.password-toggle .toggle-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    padding: 4px;
}

.password-toggle .toggle-btn:hover {
    color: var(--text-secondary);
}

/* 特性展示 */
.features {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.feature-item {
    text-align: center;
}

.feature-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.feature-text {
    font-size: 11px;
    color: var(--text-muted);
}

/* 页脚 */
.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-placeholder);
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    z-index: 100;
}

.theme-toggle:hover {
    background: var(--bg-elevated);
    transform: scale(1.1);
}