/* Atlassian风格登录界面 */

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Atlassian配色方案 */
    --primary-blue: #0052CC;
    --primary-blue-hover: #0065FF;
    --secondary-blue: #0747A6;
    --light-blue: #DEEBFF;
    --success-green: #00875A;
    --warning-orange: #FF8B00;
    --error-red: #DE350B;
    
    /* 中性色 */
    --neutral-0: #FFFFFF;
    --neutral-10: #FAFBFC;
    --neutral-20: #F4F5F7;
    --neutral-30: #EBECF0;
    --neutral-40: #DFE1E6;
    --neutral-50: #C1C7D0;
    --neutral-60: #B3BAC5;
    --neutral-70: #A5ADBA;
    --neutral-80: #97A0AF;
    --neutral-90: #8993A4;
    --neutral-100: #7A869A;
    --neutral-200: #6B778C;
    --neutral-300: #5E6C84;
    --neutral-400: #505F79;
    --neutral-500: #42526E;
    --neutral-600: #344563;
    --neutral-700: #253858;
    --neutral-800: #172B4D;
    --neutral-900: #091E42;
    
    /* 阴影 */
    --shadow-raised: 0 1px 1px rgba(9, 30, 66, 0.25), 0 0 1px rgba(9, 30, 66, 0.31);
    --shadow-overlay: 0 4px 8px -2px rgba(9, 30, 66, 0.25), 0 0 1px rgba(9, 30, 66, 0.31);
    --shadow-modal: 0 8px 16px -4px rgba(9, 30, 66, 0.25), 0 0 1px rgba(9, 30, 66, 0.31);
    
    /* 圆角 */
    --border-radius: 3px;
    --border-radius-large: 6px;
    
    /* 字体 */
    --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 过渡 */
    --transition: 0.2s ease-in-out;
}

html {
    font-size: 14px;
}

body {
    font-family: var(--font-family);
    line-height: 1.42857;
    color: var(--neutral-500);
    background-color: var(--neutral-10);
    min-height: 100vh;
}

/* 主容器 */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}



/* 主内容区域 */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 24px 40px;
    min-height: 100vh;
}

.content-wrapper {
    width: 100%;
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: center;
}

/* 左侧信息区域 */
.info-section {
    max-width: 600px;
}

/* 品牌标识 */
.brand-identity {
    margin-bottom: 48px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-img {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-raised);
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-name {
    font-size: 32px;
    font-weight: 700;
    color: var(--neutral-800);
    line-height: 1.2;
}

.brand-tagline-container {
    position: relative;
    display: inline-block;
    margin-top: 8px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.brand-tagline-container:hover {
    transform: scale(1.05);
}

.brand-tagline-container:hover .brand-tagline {
    animation-duration: 1.5s;
}

.brand-tagline-container:hover .shine-effect {
    animation-duration: 2s;
}

.brand-tagline-container:hover .glow-effect {
    animation-duration: 1s;
}

.brand-tagline-container:hover .particle {
    animation-duration: 2s;
}

.brand-tagline {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-blue);
    font-style: italic;
    position: relative;
    z-index: 3;
    text-shadow: 0 0 10px rgba(0, 82, 204, 0.3);
    background: linear-gradient(45deg, var(--primary-blue), var(--primary-blue-hover), var(--secondary-blue));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 特效容器 */
.tagline-effects {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

/* 光泽效果 */
.shine-effect {
    position: absolute;
    top: -2px;
    left: -10px;
    right: -10px;
    bottom: -2px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 45%,
        rgba(255, 255, 255, 0.8) 50%,
        rgba(255, 255, 255, 0.4) 55%,
        transparent 100%);
    transform: translateX(-100%);
    animation: shine 4s ease-in-out infinite;
    z-index: 2;
}

@keyframes shine {
    0%, 90%, 100% {
        transform: translateX(-100%);
        opacity: 0;
    }
    10%, 80% {
        opacity: 1;
    }
    50% {
        transform: translateX(100%);
        opacity: 1;
    }
}

/* 发光效果 */
.glow-effect {
    position: absolute;
    top: -4px;
    left: -8px;
    right: -8px;
    bottom: -4px;
    background: radial-gradient(ellipse at center,
        rgba(0, 82, 204, 0.3) 0%,
        rgba(0, 101, 255, 0.2) 30%,
        transparent 70%);
    border-radius: 8px;
    animation: glow 2s ease-in-out infinite alternate;
    z-index: 1;
}

@keyframes glow {
    0% {
        opacity: 0.5;
        transform: scale(1);
    }
    100% {
        opacity: 1;
        transform: scale(1.05);
    }
}

/* 粒子效果 */
.particles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 50%;
    opacity: 0;
}

.particle-1 {
    top: 20%;
    left: 10%;
    animation: float1 3s ease-in-out infinite;
}

.particle-2 {
    top: 30%;
    right: 15%;
    animation: float2 3.5s ease-in-out infinite 0.5s;
}

.particle-3 {
    bottom: 25%;
    left: 20%;
    animation: float3 4s ease-in-out infinite 1s;
}

.particle-4 {
    bottom: 20%;
    right: 10%;
    animation: float4 3.2s ease-in-out infinite 1.5s;
}

@keyframes float1 {
    0%, 100% {
        opacity: 0;
        transform: translateY(0px) scale(0.5);
    }
    50% {
        opacity: 1;
        transform: translateY(-8px) scale(1);
    }
}

@keyframes float2 {
    0%, 100% {
        opacity: 0;
        transform: translateY(0px) translateX(0px) scale(0.5);
    }
    50% {
        opacity: 1;
        transform: translateY(-6px) translateX(4px) scale(1);
    }
}

@keyframes float3 {
    0%, 100% {
        opacity: 0;
        transform: translateY(0px) scale(0.5);
    }
    50% {
        opacity: 1;
        transform: translateY(8px) scale(1);
    }
}

@keyframes float4 {
    0%, 100% {
        opacity: 0;
        transform: translateY(0px) translateX(0px) scale(0.5);
    }
    50% {
        opacity: 1;
        transform: translateY(6px) translateX(-4px) scale(1);
    }
}

.hero-content {
    margin-bottom: 48px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--neutral-800);
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 500;
    color: var(--neutral-600);
    margin-bottom: 16px;
}

.hero-description {
    font-size: 16px;
    color: var(--neutral-500);
    line-height: 1.5;
    margin-bottom: 32px;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--light-blue);
    border-radius: var(--border-radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 20px;
    flex-shrink: 0;
}

.feature-text h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--neutral-800);
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 14px;
    color: var(--neutral-500);
    line-height: 1.5;
}

/* 右侧登录区域 */
.login-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.login-card {
    background: var(--neutral-0);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-overlay);
    border: 1px solid var(--neutral-40);
    overflow: hidden;
}

/* 登录头部 */
.login-header {
    padding: 32px 32px 24px;
    text-align: center;
    border-bottom: 1px solid var(--neutral-30);
}

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

.card-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-large);
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--neutral-800);
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 14px;
    color: var(--neutral-500);
}

/* 登录表单 */
.login-form {
    padding: 32px;
}

.form-field {
    margin-bottom: 24px;
}

.field-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--neutral-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.field-input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--neutral-40);
    border-radius: var(--border-radius);
    font-size: 14px;
    color: var(--neutral-800);
    background: var(--neutral-0);
    transition: var(--transition);
    outline: none;
}

.field-input::placeholder {
    color: var(--neutral-100);
}

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

.password-field {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--neutral-100);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--neutral-500);
    background: var(--neutral-20);
}

/* 表单选项 */
.form-options {
    margin-bottom: 24px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.checkbox-input {
    display: none;
}

.checkbox-mark {
    width: 16px;
    height: 16px;
    border: 2px solid var(--neutral-40);
    border-radius: var(--border-radius);
    background: var(--neutral-0);
    position: relative;
    transition: var(--transition);
}

.checkbox-input:checked + .checkbox-mark {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
}

.checkbox-input:checked + .checkbox-mark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--neutral-0);
    font-size: 10px;
    font-weight: bold;
}

.checkbox-text {
    font-size: 14px;
    color: var(--neutral-500);
}

/* 登录按钮 */
.login-btn {
    position: relative;
    width: 100%;
    padding: 12px 24px;
    background: var(--primary-blue);
    border: none;
    border-radius: var(--border-radius);
    color: var(--neutral-0);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 24px;
    overflow: hidden;
}

.login-btn:hover:not(.loading):not(.success) {
    background: var(--primary-blue-hover);
}

.login-btn:active:not(.loading):not(.success) {
    background: var(--secondary-blue);
}

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

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    align-items: center;
    gap: 8px;
    color: var(--neutral-0);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--neutral-0);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.btn-success {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    align-items: center;
    gap: 8px;
    color: var(--neutral-0);
    font-weight: 600;
}

/* 按钮状态 */
.login-btn.loading .btn-text {
    opacity: 0;
}

.login-btn.loading .btn-loading {
    display: flex;
}

.login-btn.loading {
    background: var(--neutral-100);
}

.login-btn.success .btn-text,
.login-btn.success .btn-loading {
    display: none;
}

.login-btn.success .btn-success {
    display: flex;
}

.login-btn.success {
    background: var(--success-green);
}

.login-btn.error {
    background: var(--error-red);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

/* 消息提示 */
.alert-message {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    margin-bottom: 16px;
    border-radius: var(--border-radius);
    border: 1px solid;
    opacity: 0;
    transform: translateY(-8px);
    transition: var(--transition);
}

.alert-message.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.alert-message.success {
    background: #E3FCEF;
    border-color: var(--success-green);
    color: #006644;
}

.alert-message.error {
    background: #FFEBE6;
    border-color: var(--error-red);
    color: #BF2600;
}

.alert-message.warning {
    background: #FFFAE6;
    border-color: var(--warning-orange);
    color: #974F0C;
}

.alert-message.info {
    background: var(--light-blue);
    border-color: var(--primary-blue);
    color: var(--secondary-blue);
}

.alert-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.alert-text {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
}

.alert-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    opacity: 0.7;
    flex-shrink: 0;
}

.alert-close:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.1);
}

/* 登录底部 */
.login-footer {
    padding: 24px 32px 32px;
    background: var(--neutral-10);
    border-top: 1px solid var(--neutral-30);
    text-align: center;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 12px;
    font-weight: 500;
    transition: var(--transition);
}

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

.separator {
    color: var(--neutral-100);
    font-size: 12px;
}

.security-info {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--neutral-100);
    font-size: 11px;
    font-weight: 500;
}

.security-badge i {
    color: var(--success-green);
    font-size: 12px;
}

/* 注册提示 */
.signup-prompt {
    text-align: center;
    padding: 16px;
    background: var(--neutral-0);
    border: 1px solid var(--neutral-40);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-raised);
}

.signup-prompt p {
    font-size: 14px;
    color: var(--neutral-500);
    margin: 0;
}

.signup-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.signup-link:hover {
    color: var(--primary-blue-hover);
    text-decoration: underline;
}

/* 页面底部 */
.page-footer {
    background: var(--neutral-0);
    border-top: 1px solid var(--neutral-30);
    padding: 24px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-left .footer-text {
    font-size: 12px;
    color: var(--neutral-100);
}

.footer-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.footer-right .footer-link {
    color: var(--neutral-100);
    text-decoration: none;
    font-size: 12px;
    transition: var(--transition);
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
        max-width: 500px;
        margin: 0 auto;
    }

    .info-section {
        order: 2;
        text-align: center;
    }

    .login-section {
        order: 1;
    }

    .hero-title {
        font-size: 36px;
    }

    .features-list {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    .feature-item {
        flex-direction: column;
        text-align: center;
        max-width: 200px;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 40px 16px 24px;
    }

    .login-card {
        margin: 0 -8px;
    }

    .login-header {
        padding: 24px 24px 16px;
    }

    .login-form {
        padding: 24px;
    }

    .login-footer {
        padding: 16px 24px 24px;
    }

    .brand-name {
        font-size: 28px;
    }

    .brand-tagline {
        font-size: 16px;
    }

    .particle {
        width: 2px;
        height: 2px;
    }

    .logo-img {
        width: 56px;
        height: 56px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .features-list {
        flex-direction: column;
        gap: 16px;
    }

    .feature-item {
        flex-direction: row;
        text-align: left;
        max-width: none;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-right {
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 24px 16px 16px;
    }

    .login-header {
        padding: 20px 20px 12px;
    }

    .login-form {
        padding: 20px;
    }

    .login-footer {
        padding: 12px 20px 20px;
    }

    .brand-identity {
        margin-bottom: 32px;
    }

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

    .brand-tagline {
        font-size: 14px;
    }

    .particle {
        width: 2px;
        height: 2px;
    }

    .glow-effect {
        top: -2px;
        left: -4px;
        right: -4px;
        bottom: -2px;
    }

    .logo-img {
        width: 48px;
        height: 48px;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .footer-links {
        flex-direction: column;
        gap: 8px;
    }

    .security-info {
        flex-direction: column;
        gap: 8px;
    }
}

/* 性能优化 */
.login-card,
.feature-item,
.field-input,
.login-btn {
    will-change: transform;
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .login-card,
    .signup-prompt {
        border: 2px solid var(--neutral-200);
    }

    .field-input {
        border: 2px solid var(--neutral-200);
    }

    .login-btn {
        border: 2px solid var(--primary-blue);
    }
}