/* ========================================
   login.css - 愉你无关 登录页面样式
   ======================================== */

/* ---- CSS 变量 ---- */
:root {
    --color-primary: #4a90d9;
    --color-primary-dark: #357abd;
    --color-primary-light: rgba(74, 144, 217, 0.15);

    --bg-page: #f0f2f5;
    --bg-card: rgba(255, 255, 255, 0.92);
    --bg-input: #fff;
    --bg-btn: var(--color-primary);
    --bg-btn-hover: var(--color-primary-dark);

    --text-color: #333;
    --text-label: #555;
    --text-placeholder: #aaa;
    --text-btn: #fff;
    --text-error: #e74c3c;
    --text-link: var(--color-primary);

    --border-color: #ddd;
    --border-radius: 8px;
    --border-radius-lg: 16px;

    --card-width: 420px;
    --card-padding: 40px 40px 36px;

    --font-size-title: 28px;
    --font-size-subtitle: 14px;
    --font-size-label: 14px;
    --font-size-input: 15px;
    --font-size-small: 13px;
}

/* ---- 页面整体 ---- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-page);
    background-image: url(/static/imgs/登录页面背景.jpg);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* ---- 外层容器：卡片 ---- */
.container {
    width: var(--card-width);
    max-width: 100%;
}

.container > .row > div {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12),
                0 2px 8px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(12px);
    padding: var(--card-padding);
}

/* ---- 标题区域 ---- */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-title {
    font-size: var(--font-size-title);
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: var(--font-size-subtitle);
    color: #999;
    letter-spacing: 0.5px;
}

/* ---- 表单布局 ---- */
form {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

form > div {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* 标签 */
form label {
    font-size: var(--font-size-label);
    color: var(--text-label);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 输入框 */
form input[type="text"],
form input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-input);
    color: var(--text-color);
    background: var(--bg-input);
    transition: border-color 0.25s, box-shadow 0.25s;
    outline: none;
    line-height: 1.5;
}

form input[type="text"]:focus,
form input[type="password"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

/* ---- 验证码行 ---- */
form .row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

/* 左侧：验证码输入框 */
form .row > div:first-child {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

/* 右侧：验证码图片 + 换一张 */
form .row > div:last-child {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

#captcha-img {
    width: 130px;
    height: 46px;
    border-radius: var(--border-radius);
    border: 1.5px solid var(--border-color);
    cursor: pointer;
    object-fit: cover;
    transition: border-color 0.2s;
}

#captcha-img:hover {
    border-color: var(--color-primary);
}

form .row a {
    font-size: var(--font-size-small);
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* 错误提示 */
#error_msg {
    font-size: var(--font-size-small);
    min-height: 18px;
    display: block;
}

/* ---- 提交按钮 ---- */
.login_btn {
    width: 100%;
    padding: 12px 0;
    margin-top: 6px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 6px;
    text-indent: 6px;  /* 平衡 letter-spacing 末尾空隙 */
    color: var(--text-btn);
    background: var(--bg-btn);
    cursor: pointer;
    transition: background 0.25s, transform 0.1s, box-shadow 0.25s;
    box-shadow: 0 2px 8px rgba(74, 144, 217, 0.35);
}

.login_btn:hover {
    background: var(--bg-btn-hover);
    box-shadow: 0 4px 12px rgba(74, 144, 217, 0.45);
}

.login_btn:active {
    transform: scale(0.97);
    box-shadow: 0 1px 4px rgba(74, 144, 217, 0.3);
}

/* 清除 Bootstrap 残留样式 */
.btn-default {
    background-image: none;
    text-shadow: none;
    border-color: transparent;
}

.pull-right {
    float: none !important;
}

/* ---- 注册页扩展样式 ---- */

/* 发送验证码按钮（蓝色系，与注册按钮/输入框对齐） */
.send-code-btn {
    display: inline-block;
    height: 46px;
    padding: 0 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-btn);
    background: var(--bg-btn);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.25s, transform 0.1s, box-shadow 0.25s;
}

.send-code-btn:hover {
    background: var(--bg-btn-hover);
    box-shadow: 0 4px 12px rgba(74, 144, 217, 0.45);
}

.send-code-btn:active {
    transform: scale(0.97);
}

/* 倒计时/发送中的禁用态 */
.send-code-btn:disabled {
    background: #b8c4d0;
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

/* 字段级错误提示 */
.field-error {
    font-size: var(--font-size-small);
    color: var(--text-error);
    min-height: 16px;
    display: block;
    line-height: 1.3;
}

/* 输入框错误状态 */
form input.input-error {
    border-color: var(--text-error);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.12);
}

/* 注册按钮（登录页） */
.registr-btn {
    display: block;
    width: 100%;
    padding: 12px 0;
    margin-top: 10px;
    border: 1.5px solid var(--color-primary);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 6px;
    text-indent: 6px;
    color: var(--color-primary);
    background: transparent;
    cursor: pointer;
    transition: background 0.25s, color 0.25s, transform 0.1s;
    text-align: center;
    text-decoration: none;
}

.registr-btn:hover {
    background: var(--color-primary);
    color: #fff;
}

.registr-btn:active {
    transform: scale(0.97);
}

/* 返回登录链接 */
.back-link {
    display: block;
    text-align: center;
    margin-top: 14px;
    font-size: var(--font-size-small);
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* ---- 响应式 ---- */
@media screen and (max-width: 480px) {
    body {
        padding: 12px;
    }

    .container > .row > div {
        padding: 32px 24px 28px;
        border-radius: 12px;
    }

    .login-title {
        font-size: 24px;
        letter-spacing: 2px;
    }

    form .row {
        flex-direction: column;
    }

    form .row > div:last-child {
        flex-direction: row;
        align-items: center;
        gap: 10px;
    }

    #captcha-img {
        width: 120px;
        height: 42px;
    }

    .login_btn {
        letter-spacing: 4px;
        text-indent: 4px;
    }
}