/* ============================================
   登录页面样式优化：沉浸式背景 + 玻璃面板
   现代化UI/UX设计，极致视觉体验
   ============================================ */
.login-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(24px, 4vw, 60px);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 120px);
    position: relative;
    z-index: var(--z-base);
}

.login-container::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(calc(100% - 32px), 560px);
    height: min(calc(100% - 32px), 700px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(140, 252, 200, 0.2);
    opacity: 0.4;
    pointer-events: none;
}

.login-dialog {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    padding: clamp(40px, 5vw, 56px);
    color: var(--color-text-main);
    background: linear-gradient(150deg, 
        rgba(18, 28, 59, 0.98), 
        rgba(15, 23, 42, 0.95),
        rgba(12, 20, 38, 0.92));
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    box-shadow: 
        0 25px 80px rgba(0, 0, 0, 0.6),
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 2px 8px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        inset 0 -1px 0 rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    transition: all var(--transition-base);
    animation: dialogFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

@keyframes dialogFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
        filter: blur(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

.login-dialog:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 
        0 30px 100px rgba(0, 0, 0, 0.7),
        0 12px 40px rgba(0, 0, 0, 0.5),
        0 4px 12px rgba(255, 255, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.12),
        inset 0 -1px 0 rgba(0, 0, 0, 0.25),
        0 0 60px rgba(140, 252, 200, 0.15);
    border-color: rgba(255, 255, 255, 0.18);
}

.login-dialog::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% -20%, rgba(125, 211, 252, 0.4), transparent 50%);
    opacity: 0.8;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

.login-dialog:hover::before {
    opacity: 1;
}

.login-dialog::after {
    content: "";
    position: absolute;
    top: 20%;
    right: -40%;
    width: 60%;
    height: 60%;
    transform: rotate(35deg);
    background: linear-gradient(130deg, rgba(140, 252, 200, 0.4), transparent);
    filter: blur(40px);
    pointer-events: none;
    animation: float 8s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: rotate(35deg) translateY(0); }
    50% { transform: rotate(40deg) translateY(-20px); }
}

.login-dialog h3 {
    text-align: center;
    font-size: clamp(32px, 4vw, 42px);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-wide);
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, 
        var(--color-text-main) 0%, 
        var(--color-primary) 50%,
        var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    animation: titleShine 3s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(140, 252, 200, 0.3));
    width: 100%;
}

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

.login-dialog h3 + p {
    font-size: 15px;
    color: var(--color-text-muted);
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
    text-align: center;
    width: 100%;
}

.login-dialog .row {
    width: 100%;
    margin-bottom: 24px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.login-dialog .row span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 10px;
    width: 100%;
}

.login-dialog input[type="text"],
.login-dialog input[type="password"] {
    width: 100%;
    padding: 16px 20px 16px 52px;
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.15);
    background: linear-gradient(135deg, 
        rgba(8, 12, 28, 0.8), 
        rgba(4, 8, 20, 0.9));
    color: var(--color-text-main);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    transition: all var(--transition-base);
    box-shadow: 
        inset 0 2px 8px rgba(0, 0, 0, 0.3),
        0 1px 2px rgba(255, 255, 255, 0.05);
    position: relative;
    min-height: 52px;
}

.login-dialog input[type="text"]::placeholder,
.login-dialog input[type="password"]::placeholder {
    color: var(--color-text-muted);
    opacity: 0.6;
    transition: opacity var(--transition-base);
}

.login-dialog input[type="text"]:focus::placeholder,
.login-dialog input[type="password"]:focus::placeholder {
    opacity: 0.4;
}

.login-dialog .row::after {
    content: "";
    position: absolute;
    top: calc(50% + 4px);
    left: 16px;
    width: 20px;
    height: 20px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.7;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.login-dialog .row:first-of-type::after {
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238cfcc8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 21v-2a4 4 0 0 0-3-3.87'%3E%3C/path%3E%3Cpath d='M8 21v-2a4 4 0 0 1 3-3.87'%3E%3C/path%3E%3Ccircle cx='12' cy='7' r='4'%3E%3C/circle%3E%3C/svg%3E");
}

.login-dialog .row:nth-of-type(2)::after {
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238cfcc8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Crect x='3' y='11' width='18' height='11' rx='2'%3E%3C/rect%3E%3Cpath d='M7 11V7a5 5 0 0 1 10 0v4'%3E%3C/path%3E%3C/svg%3E");
}

.login-dialog input[type="text"]:focus,
.login-dialog input[type="password"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 
        0 0 0 4px var(--color-primary-soft),
        inset 0 2px 8px rgba(5, 150, 105, 0.3),
        0 2px 8px rgba(140, 252, 200, 0.2),
        0 0 30px rgba(140, 252, 200, 0.15);
    transform: translateY(-2px) scale(1.01);
    background: linear-gradient(135deg, 
        rgba(8, 12, 28, 0.9), 
        rgba(4, 8, 20, 0.95));
}

/* 输入框验证状态 */
.login-dialog input[type="text"].error,
.login-dialog input[type="password"].error {
    border-color: var(--color-error);
    box-shadow: 
        0 0 0 4px rgba(239, 68, 68, 0.2),
        inset 0 2px 8px rgba(239, 68, 68, 0.2);
    animation: shake 0.4s ease;
}

.login-dialog input[type="text"].success,
.login-dialog input[type="password"].success {
    border-color: var(--color-success);
    box-shadow: 
        0 0 0 4px rgba(16, 185, 129, 0.2),
        inset 0 2px 8px rgba(16, 185, 129, 0.2);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

/* 错误提示信息 */
.login-dialog .error-message {
    margin-top: 8px;
    font-size: var(--font-size-sm);
    color: var(--color-error);
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.login-dialog .error-message.show {
    opacity: 1;
    transform: translateY(0);
}

.login-dialog .error-message::before {
    content: "⚠";
    font-size: 16px;
}

.login-dialog input[type="text"]:focus + .row::after,
.login-dialog input[type="password"]:focus + .row::after,
.login-dialog .row:has(input:focus)::after {
    opacity: 1;
    transform: scale(1.1);
}

.login-dialog .sumbit-row {
    width: 100%;
    margin-top: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-dialog button {
    width: 100%;
    padding: 18px 28px;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family-base);
    letter-spacing: var(--letter-spacing-wider);
    background: var(--gradient-primary);
    color: var(--color-text-inverse);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 
        0 12px 40px rgba(101, 217, 168, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.25),
        inset 0 -1px 0 rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
}

.login-dialog button::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.login-dialog button:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 
        0 20px 60px rgba(101, 217, 168, 0.5),
        0 8px 20px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.35),
        inset 0 -1px 0 rgba(0, 0, 0, 0.15),
        0 0 40px rgba(140, 252, 200, 0.4);
    background: linear-gradient(120deg, 
        var(--color-primary-hover), 
        var(--color-primary),
        var(--color-primary-strong));
}

.login-dialog button:hover::before {
    left: 100%;
}

.login-dialog button:active {
    transform: translateY(-1px);
    box-shadow: 
        0 8px 20px rgba(101, 217, 168, 0.3),
        0 1px 3px rgba(0, 0, 0, 0.2);
}

.login-dialog button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 按钮加载状态 */
.login-dialog button.loading {
    pointer-events: none;
    position: relative;
    color: transparent;
}

.login-dialog button.loading::after {
    content: "";
    position: absolute;
    width: 24px;
    height: 24px;
    top: 50%;
    left: 50%;
    margin-left: -12px;
    margin-top: -12px;
    border: 3px solid var(--color-text-inverse);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.login-dialog .register-link {
    margin-top: 28px;
    text-align: center;
    font-size: 14px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.login-dialog .register-link span {
    text-transform: none;
    letter-spacing: 0;
    font-weight: 400;
}

.login-dialog .register-link a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding: 2px 4px;
}

.login-dialog .register-link a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width 0.3s ease;
    border-radius: 1px;
}

.login-dialog .register-link a:hover {
    color: var(--color-primary-strong);
    text-shadow: 0 0 12px rgba(140, 252, 200, 0.6);
}

.login-dialog .register-link a:hover::after {
    width: 100%;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .login-container {
        padding: 20px 16px;
        min-height: calc(100vh - 100px);
    }

    .login-dialog {
        padding: 28px 24px;
    }

    .login-container::after {
        inset: 12px;
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: 16px 12px;
    }

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

    .login-dialog h3 {
        font-size: 24px;
    }

    .login-dialog .row {
        margin-bottom: 20px;
    }

    .login-dialog input[type="text"],
    .login-dialog input[type="password"] {
        padding: 14px 16px 14px 46px;
        font-size: 15px;
    }

    .login-dialog button {
        padding: 14px 20px;
        font-size: 15px;
    }
}

/* 减少动画（性能优化） */
@media (prefers-reduced-motion: reduce) {
    .login-dialog,
    .login-dialog::after,
    .login-dialog button::before,
    .login-dialog .register-link a::after {
        animation: none;
        transition: none;
    }
}