/* ============================================
   SMA智能体 - 登录注册页样式
   设计风格：现代紫蓝渐变、动态效果
   ============================================ */

/* CSS变量 */
:root {
    --primary-start: #667eea;
    --primary-end: #764ba2;
    --primary-gradient: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    --primary-gradient-hover: linear-gradient(135deg, #7b93ff, #8b5fbf);
    --primary-gradient-soft: linear-gradient(135deg, rgba(102,126,234,0.1), rgba(118,75,162,0.1));
    --primary-color: #667eea;
    --primary-dark: #5a6fd6;
    --primary-light: #8b9cf7;

    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --card-shadow: 0 8px 32px rgba(102, 126, 234, 0.15), 0 2px 8px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 16px 48px rgba(102, 126, 234, 0.2), 0 4px 12px rgba(0, 0, 0, 0.08);
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --border-color: #e5e7eb;
    --border-focus: var(--primary-start);
    --input-bg: #f9fafb;
    --input-bg-focus: #ffffff;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* ============================================
   动态背景
   ============================================ */
.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        opacity: 0;
        transform: translateY(-10vh) scale(1);
    }
}

.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
}

.bg-orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(102,126,234,0.5), transparent 70%);
    top: -10%;
    right: -5%;
    animation: orbFloat1 12s ease-in-out infinite;
}

.bg-orb-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(118,75,162,0.4), transparent 70%);
    bottom: -10%;
    left: -5%;
    animation: orbFloat2 15s ease-in-out infinite;
}

.bg-orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(102,126,234,0.3), transparent 70%);
    top: 40%;
    left: 30%;
    animation: orbFloat3 10s ease-in-out infinite;
}

@keyframes orbFloat1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-30px, 40px) scale(1.1); }
    66% { transform: translate(20px, -20px) scale(0.95); }
}

@keyframes orbFloat2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

@keyframes orbFloat3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 30px) scale(1.15); }
}

/* ============================================
   主容器
   ============================================ */
.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeInUp 0.6s var(--transition-normal);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   品牌区域
   ============================================ */
.brand-area {
    text-align: center;
    margin-bottom: 32px;
}

.brand-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    animation: brandFloat 3s ease-in-out infinite;
}

.brand-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 4px 12px rgba(102,126,234,0.4));
}

@keyframes brandFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.brand-name {
    font-size: 28px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.brand-slogan {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* ============================================
   登录卡片
   ============================================ */
.login-card {
    width: 100%;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: 36px 32px;
    backdrop-filter: blur(20px);
    transition: box-shadow var(--transition-normal), transform var(--transition-normal);
    border: 1px solid rgba(255,255,255,0.8);
}

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

/* ============================================
   Tab切换
   ============================================ */
.auth-tabs {
    display: flex;
    position: relative;
    margin-bottom: 28px;
    background: var(--input-bg);
    border-radius: var(--radius-md);
    padding: 4px;
}

.tab-btn {
    flex: 1;
    padding: 10px 8px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
    position: relative;
    z-index: 1;
    font-family: var(--font-family);
}

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

.tab-indicator {
    position: absolute;
    height: calc(100% - 8px);
    top: 4px;
    left: 4px;
    width: calc(33.333% - 2.67px);
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    transition: transform var(--transition-normal);
}

.tab-indicator[data-index="1"] {
    transform: translateX(calc(100% + 4px));
}

.tab-indicator[data-index="2"] {
    transform: translateX(calc(200% + 8px));
}

/* ============================================
   表单样式
   ============================================ */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group {
    position: relative;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    overflow: hidden;
}

.input-wrapper::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
    z-index: 1;
}

.input-wrapper:focus-within {
    background: var(--input-bg-focus);
    border-color: rgba(102, 126, 234, 0.2);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.08);
}

.input-wrapper:focus-within::before {
    width: 100%;
}

.input-wrapper.error {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.02);
}

.input-wrapper.error:focus-within {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.4);
}

.input-wrapper.error::before {
    background: var(--error-color);
}

.input-wrapper.success {
    border-color: rgba(16, 185, 129, 0.3);
}

.input-wrapper.success::before {
    background: var(--success-color);
}

.input-icon {
    width: 20px;
    height: 20px;
    margin-left: 14px;
    color: var(--text-tertiary);
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.input-wrapper:focus-within .input-icon {
    color: var(--primary-color);
}

.input-wrapper.error .input-icon {
    color: var(--error-color);
}

.form-input {
    flex: 1;
    padding: 14px 14px;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-family);
    width: 100%;
}

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

.toggle-password {
    background: none;
    border: none;
    padding: 12px 14px;
    cursor: pointer;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

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

.toggle-password svg {
    width: 20px;
    height: 20px;
}

/* 短信验证码按钮 */
.input-wrapper-code {
    flex-wrap: nowrap;
}

.sms-btn {
    padding: 8px 16px;
    margin: 4px 6px 4px 0;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
    font-family: var(--font-family);
    flex-shrink: 0;
}

.sms-btn:hover:not(:disabled) {
    opacity: 0.9;
    transform: scale(1.02);
}

.sms-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--text-tertiary);
}

/* 错误提示 */
.error-msg {
    display: block;
    font-size: 12px;
    color: var(--error-color);
    padding: 4px 14px 0;
    min-height: 18px;
    opacity: 0;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
}

.error-msg.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 密码强度 */
.password-strength {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 14px 0;
    height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.password-strength.visible {
    height: 20px;
    opacity: 1;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.strength-fill.weak { width: 33%; background: var(--error-color); }
.strength-fill.medium { width: 66%; background: var(--warning-color); }
.strength-fill.strong { width: 100%; background: var(--success-color); }

.strength-text {
    font-size: 11px;
    white-space: nowrap;
}

.strength-text.weak { color: var(--error-color); }
.strength-text.medium { color: var(--warning-color); }
.strength-text.strong { color: var(--success-color); }

/* ============================================
   复选框
   ============================================ */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
}

.checkbox-wrapper, .agreement-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.agreement-wrapper {
    padding: 8px 0 4px;
    font-size: 13px;
}

.agreement-wrapper input[type="checkbox"] {
    display: none;
}

.checkbox-wrapper input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    position: relative;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.checkbox-wrapper input:checked + .checkmark,
.agreement-wrapper input:checked + .checkmark {
    background: var(--primary-gradient);
    border-color: transparent;
}

.checkmark::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform var(--transition-fast);
}

.checkbox-wrapper input:checked + .checkmark::after,
.agreement-wrapper input:checked + .checkmark::after {
    transform: rotate(45deg) scale(1);
}

.forgot-link, .terms-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.forgot-link:hover, .terms-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.agreement-error {
    padding-left: 26px !important;
}

/* ============================================
   提交按钮
   ============================================ */
.submit-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-top: 12px;
    font-family: var(--font-family);
    letter-spacing: 2px;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.submit-btn:hover:not(:disabled)::before {
    left: 100%;
}

.submit-btn:hover:not(:disabled) {
    background: var(--primary-gradient-hover);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.35);
    transform: translateY(-1px);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-text {
    transition: opacity var(--transition-fast);
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.spinner {
    width: 24px;
    height: 24px;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   分割线
   ============================================ */
.divider {
    display: flex;
    align-items: center;
    margin: 20px 0 12px;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 16px;
    font-size: 13px;
    color: var(--text-tertiary);
}

.switch-hint {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.switch-hint a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* ============================================
   找回密码头部
   ============================================ */
.reset-header {
    text-align: center;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.reset-header svg {
    margin-bottom: 8px;
}

.reset-title {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ============================================
   底部
   ============================================ */
.auth-footer {
    margin-top: 24px;
    text-align: center;
}

.auth-footer p {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* ============================================
   Toast通知
   ============================================ */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: white;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    animation: toastIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 260px;
    max-width: 400px;
    backdrop-filter: blur(10px);
}

.toast.success {
    background: linear-gradient(135deg, #10b981, #059669);
}

.toast.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.toast.info {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.toast.warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.toast-exit {
    animation: toastOut 0.3s ease-in forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100px); }
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 480px) {
    .login-container {
        padding: 16px;
    }

    .login-card {
        padding: 28px 20px;
        border-radius: var(--radius-lg);
    }

    .brand-name {
        font-size: 24px;
    }

    .tab-btn {
        font-size: 13px;
        padding: 8px 4px;
    }

    .sms-btn {
        padding: 6px 12px;
        font-size: 12px;
    }

    .submit-btn {
        padding: 13px;
        font-size: 15px;
    }

    .bg-orb-1 { width: 250px; height: 250px; }
    .bg-orb-2 { width: 200px; height: 200px; }
    .bg-orb-3 { width: 150px; height: 150px; }

    .toast-container {
        top: 12px;
        right: 12px;
        left: 12px;
    }

    .toast {
        min-width: auto;
        max-width: 100%;
    }
}

@media (max-height: 700px) {
    .login-container {
        justify-content: flex-start;
        padding-top: 16px;
    }

    .brand-area {
        margin-bottom: 20px;
    }

    .brand-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 10px;
    }

    .brand-name {
        font-size: 22px;
    }

    .login-card {
        padding: 24px 20px;
    }
}

/* ============================================
   辅助动画
   ============================================ */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.shake {
    animation: shake 0.4s ease-in-out;
}

.form-group.shake .input-wrapper {
    animation: shake 0.4s ease-in-out;
}

/* 减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .bg-orb, .particle {
        display: none;
    }
}