/**
 * 登录页面样式
 * 提取自 login.php，支持缓存和暗色模式
 */

:root {
    --login-primary: #165dff;
    --login-primary-hover: #4080ff;
    --login-text: #1d2129;
    --login-text-secondary: #86909c;
    --login-border: #e5e6eb;
    --login-page-bg: #f7f8fa;
    --login-card-bg: #ffffff;
    --login-input-bg: #ffffff;
    --login-input-border: #e5e6eb;
    --login-input-focus-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

html[data-theme="dark"],
.dark-theme {
    --login-text: #f7f8fa;
    --login-text-secondary: #86909c;
    --login-border: #3f3f46;
    --login-page-bg: #17171a;
    --login-card-bg: #232324;
    --login-input-bg: #2a2a2b;
    --login-input-border: #3f3f46;
    --login-input-focus-shadow: 0 0 0 3px rgba(64, 128, 255, 0.15);
}

* { box-sizing: border-box; }

html, body {
    min-height: 100%;
    margin: 0;
    padding: 0;
}

body.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: var(--login-text);
    background: var(--login-page-bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    transition: background-color 0.3s ease;
}

.login-card {
    width: min(400px, 100%);
    padding: 36px;
    background: var(--login-card-bg);
    border: 1px solid var(--login-border);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    animation: loginCardIn 0.5s var(--ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) forwards;
}

@keyframes loginCardIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-header {
    margin-bottom: 30px;
    text-align: center;
}

.login-header h1 {
    margin: 0 0 8px;
    font-size: 24px;
    line-height: 34px;
    font-weight: 600;
    color: var(--login-text);
}

.login-header p {
    margin: 0;
    color: var(--login-text-secondary);
    font-size: 14px;
    line-height: 22px;
}

.field {
    margin-bottom: 20px;
    animation: fieldIn 0.4s var(--ease-out) backwards;
}

.field:nth-child(2) { animation-delay: 0.05s; }
.field:nth-child(3) { animation-delay: 0.1s; }
.field:nth-child(4) { animation-delay: 0.15s; }

@keyframes fieldIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.input-wrap {
    position: relative;
}

.form-input {
    width: 100%;
    height: 42px;
    padding: 0 12px;
    color: var(--login-text);
    background: var(--login-input-bg);
    border: 1px solid var(--login-input-border);
    border-radius: 6px;
    outline: none;
    font: inherit;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.form-input::placeholder {
    color: var(--login-text-secondary);
    opacity: 0.7;
}

.form-input:hover {
    border-color: #a9aeb8;
}

.form-input:focus {
    border-color: var(--login-primary);
    box-shadow: var(--login-input-focus-shadow);
}

.password-input {
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    top: 0;
    right: 0;
    width: 42px;
    height: 42px;
    padding: 0;
    color: var(--login-text-secondary);
    background: transparent;
    border: 0;
    cursor: pointer;
    border-radius: 0 6px 6px 0;
    transition: color 0.2s, background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.password-toggle:hover {
    color: var(--login-primary);
    background: rgba(22, 93, 255, 0.04);
}

.password-toggle:active {
    background: rgba(22, 93, 255, 0.08);
}

.password-toggle svg {
    width: 18px;
    height: 18px;
    vertical-align: middle;
}

.captcha-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 136px;
    gap: 10px;
}

.captcha-box {
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    padding: 0 10px;
    background: var(--login-page-bg);
    border: 1px solid var(--login-border);
    border-radius: 6px;
    white-space: nowrap;
    transition: border-color 0.2s;
}

.captcha-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--login-text);
    font-variant-numeric: tabular-nums;
    letter-spacing: 1px;
}

.captcha-refresh {
    padding: 4px 8px;
    color: var(--login-primary);
    background: transparent;
    border: 0;
    font-size: 12px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s, opacity 0.2s;
}

.captcha-refresh:hover {
    background: rgba(22, 93, 255, 0.08);
}

.captcha-refresh:disabled {
    color: var(--login-text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
    background: none;
}

.submit-btn {
    width: 100%;
    height: 42px;
    margin-top: 6px;
    color: #fff;
    background: var(--login-primary);
    border: 0;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    animation: fieldIn 0.4s var(--ease-out) 0.2s backwards;
}

.submit-btn:hover {
    background: var(--login-primary-hover);
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.25);
}

.submit-btn:active {
    background: #0e42d2;
    transform: scale(0.98);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.login-note {
    margin: 18px 0 0;
    color: var(--login-text-secondary);
    font-size: 12px;
    line-height: 20px;
    text-align: center;
}

/* 暗色模式切换按钮（登录页可用） */
.login-theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--login-card-bg);
    border: 1px solid var(--login-border);
    color: var(--login-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    z-index: 100;
}

.login-theme-toggle:hover {
    background: var(--login-primary);
    color: #fff;
    border-color: var(--login-primary);
}

.login-theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* 响应式 */
@media (max-width: 480px) {
    body.login-page {
        padding: 16px;
        align-items: flex-start;
        padding-top: 40px;
    }

    .login-card {
        padding: 28px 22px;
    }

    .captcha-row {
        grid-template-columns: minmax(0, 1fr) 128px;
    }

    .login-header h1 {
        font-size: 20px;
    }
}