/* ===========================================================
   auth.css - 登录/注册/忘记密码页面共享样式
   login.html 和 register.html 统一使用的 CSS
   =========================================================== */

/* ===== Reset & Base ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: #0d1f11;
}

/* ===== 顶部导航条 ===== */
.overlay-nav {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    height: 68px;
    /* 默认登录页风格（白色毛玻璃） */
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.header-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.header-brand img:not(.logo-img-small) {
    height: 42px; width: auto;
    object-fit: contain;
}
/* 登录页LOGO尺寸限制 */
.logo-img-small {
    width: 40px !important;
    height: 40px !important;
    max-width: 40px !important;
    max-height: 40px !important;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}
.header-brand-name {
    font-size: 20px; font-weight: 700; color: #065f46; letter-spacing: 0.3px;
}
.header-brand-sub {
    font-size: 13px; color: #6b7280; margin-top: 2px;
}

/* 语言切换 */
.lang-switch { display: flex; gap: 8px; }
.lang-btn {
    padding: 8px 16px; border-radius: 24px; font-size: 13px; font-weight: 600;
    text-decoration: none; border: 1.5px solid #d1d5db; color: #374151;
    background: rgba(255, 255, 255, 0.6); backdrop-filter: blur(8px);
    transition: all 0.2s; cursor: pointer;
    display: inline-flex; align-items: center; gap: 6px;
}
.lang-btn:hover {
    border-color: #9ca3af;
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}
.lang-btn.active {
    border-color: #16a34a;
    background: rgba(22, 163, 74, 0.1);
    color: #065f46;
}

/* ===== 中间主区域（背景图 + 内容） ===== */
.page-main {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
}

/* 背景图层 */
.bg-layer {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #0d2b18;
    z-index: 0;
    animation: bgFadeIn 1.2s ease forwards;
}
@keyframes bgFadeIn {
    from { opacity: 0; transform: scale(1.04); }
    to   { opacity: 1; transform: scale(1); }
}

/* 渐变遮罩 */
.bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        110deg,
        rgba(4,18,7,0.72) 0%,
        rgba(8,28,12,0.58) 40%,
        rgba(4,12,6,0.35) 70%,
        rgba(0,0,0,0.18) 100%
    );
    z-index: 1;
}

/* 内容层 */
.page-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    padding: 48px 72px 48px 52px;
    gap: 0;
}

/* 左侧标语 */
.tagline-section {
    flex: 1;
    color: #fff;
    padding-right: 60px;
}
.tagline {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.28;
    text-shadow: 0 2px 20px rgba(0,0,0,0.6);
    letter-spacing: -0.5px;
}
.tagline span { color: #86efac; }

/* ===== 表单卡片 ===== */
.login-form-wrap {
    width: 380px;
    flex-shrink: 0;
    background: rgba(255,255,255,0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 52px 40px 44px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.30), 0 2px 10px rgba(0,0,0,0.15);
}
.login-form-title {
    font-size: 24px; font-weight: 700; color: #111827; margin-bottom: 5px;
}
.login-form-sub {
    font-size: 13px; color: #6b7280; margin-bottom: 28px;
}

/* ===== 表单控件 ===== */
.form-group { margin-bottom: 18px; }
.form-group label {
    display: block; margin-bottom: 6px;
    font-size: 13px; font-weight: 500; color: #374151;
}
.input-icon-wrap {
    position: relative; display: flex; align-items: center;
}
.input-icon {
    position: absolute; left: 13px; font-size: 14px;
    color: #9ca3af; transition: color 0.2s;
    pointer-events: none; z-index: 1;
}
.input-icon-wrap:focus-within .input-icon { color: #16a34a; }
.input-icon-wrap input {
    width: 100%; padding: 11px 13px 11px 38px;
    border: 1.5px solid #e5e7eb; border-radius: 9px;
    font-size: 14px; color: #111827; background: #f9fafb;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.input-icon-wrap input:focus {
    outline: none; border-color: #16a34a;
    box-shadow: 0 0 0 4px rgba(22,163,74,0.14); background: #fff;
}
.input-icon-wrap input.error   { border-color: #ef4444; }
.input-icon-wrap input.success { border-color: #10b981; }

.error-message   { color: #ef4444; font-size: 11.5px; margin-top: 4px; display: none; }
.success-message { color: #10b981; font-size: 11.5px; margin-top: 4px; display: none; }

/* ===== 按钮 - 登录/注册通用渐变 ===== */
.btn-login, .btn-register, .btn-submit {
    width: 100%; padding: 12px;
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #fff; border: none; border-radius: 10px;
    font-size: 15px; font-weight: 600; cursor: pointer;
    transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
    margin-top: 6px;
    box-shadow: 0 3px 14px rgba(22,163,74,0.38);
}
.btn-login:hover, .btn-register:hover, .btn-submit:hover {
    opacity: 0.9; transform: translateY(-1px);
    box-shadow: 0 6px 22px rgba(22,163,74,0.45);
}
.btn-login:active, .btn-register:active, .btn-submit:active { transform: translateY(0); }

/* ===== 底部链接 ===== */
.login-register-link {
    text-align: center; margin-top: 16px;
    font-size: 13px; color: #6b7280;
}
.login-register-link a { color: #16a34a; font-weight: 500; text-decoration: none; }
.login-register-link a:hover { text-decoration: underline; }

.login-link {
    text-align: center; margin-top: 14px; font-size: 13px; color: #6b7280;
}
.login-link a { color: #16a34a; font-weight: 500; text-decoration: none; }
.login-link a:hover { text-decoration: underline; }

/* ===== Flash 消息 ===== */
.login-messages { margin-bottom: 16px; }
.alert {
    padding: 9px 13px; border-radius: 8px; margin-bottom: 7px;
    font-size: 13px; display: flex; align-items: center; gap: 7px;
}
.alert-success { background:#dcfce7; color:#166534; border-left:3px solid #16a34a; }
.alert-danger  { background:#fee2e2; color:#dc2626; border-left:3px solid #dc2626; }
.alert-warning { background:#fef3c7; color:#d97706; border-left:3px solid #d97706; }
.alert-info    { background:#dbeafe; color:#2563eb; border-left:3px solid #2563eb; }

/* ===== 底部备案栏 ===== */
.site-footer {
    height: 46px;
    background: #fff;
    border-top: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    font-size: 12px;
    color: #9ca3af;
    flex-shrink: 0;
}
.site-footer a { color: #9ca3af; text-decoration: none; }
.site-footer a:hover { color: #6b7280; }

/* ===== 注册&忘记密码页特有样式（半透明导航在背景图上） ===== */
.page-register .overlay-nav,
.page-forgot-password .overlay-nav {
    padding: 24px 48px;
    height: auto;
    background: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
    box-shadow: none;
}
.page-register .header-brand-name,
.page-forgot-password .header-brand-name {
    color: #fff;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
.page-register .header-brand-sub,
.page-forgot-password .header-brand-sub {
    color: rgba(255,255,255,0.85);
    text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.page-register .lang-btn,
.page-forgot-password .lang-btn {
    border: 2px solid rgba(255,255,255,0.5);
    color: #fff;
    background: rgba(255,255,255,0.15);
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.page-register .lang-btn:hover,
.page-forgot-password .lang-btn:hover {
    border-color: rgba(255,255,255,0.8);
    background: rgba(255,255,255,0.25);
}
.page-register .lang-btn.active,
.page-forgot-password .lang-btn.active {
    border-color: #86efac;
    background: rgba(134,239,172,0.3);
    color: #fff;
}
.page-register .page-content,
.page-forgot-password .page-content {
    padding: 32px 72px 32px 52px;
}
.page-register .login-form-wrap,
.page-forgot-password .login-form-wrap {
    width: 400px;
    padding: 48px 40px 40px;
    max-height: calc(100vh - 62px - 46px - 24px);
    overflow-y: auto;
}
.page-register .login-form-wrap::-webkit-scrollbar,
.page-forgot-password .login-form-wrap::-webkit-scrollbar { width: 4px; }
.page-register .login-form-wrap::-webkit-scrollbar-track,
.page-forgot-password .login-form-wrap::-webkit-scrollbar-track { background: transparent; }
.page-register .login-form-wrap::-webkit-scrollbar-thumb,
.page-forgot-password .login-form-wrap::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 2px; }
.page-register .login-form-title,
.page-forgot-password .login-form-title { font-size: 23px; margin-bottom: 4px; }
.page-register .login-form-sub,
.page-forgot-password .login-form-sub { margin-bottom: 22px; }
.page-register .form-group,
.page-forgot-password .form-group { margin-bottom: 15px; }
.page-register .form-group label,
.page-forgot-password .form-group label { margin-bottom: 5px; }
.page-register .input-icon,
.page-forgot-password .input-icon { font-size: 13px; }
.page-register .input-icon-wrap input,
.page-forgot-password .input-icon-wrap input { padding: 10px 13px 10px 36px; }

/* 获取验证码行 */
.sms-row { display: flex; gap: 10px; align-items: flex-start; }
.sms-row .input-icon-wrap { flex: 1; }
.btn-sms {
    flex-shrink: 0; width: 108px;
    padding: 10px 0; font-size: 13px; font-weight: 500;
    background: #f0fdf4; color: #16a34a;
    border: 1.5px solid #16a34a; border-radius: 9px;
    cursor: pointer; transition: background 0.2s, color 0.2s;
    white-space: nowrap;
}
.btn-sms:hover:not(:disabled) { background: #16a34a; color: #fff; }
.btn-sms:disabled { background: #f3f4f6; color: #9ca3af; border-color: #e5e7eb; cursor: not-allowed; }

/* 密码强度条 */
.password-strength {
    height: 3px; margin-top: 7px; border-radius: 2px; background: #e5e7eb; overflow: hidden;
}
.password-strength-bar { height: 100%; transition: width 0.3s; }
.strength-weak   { background: #ef4444; width: 33%; }
.strength-medium { background: #f59e0b; width: 66%; }
.strength-strong { background: #10b981; width: 100%; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .page-main { overflow-y: auto; overflow-x: hidden; }
    .tagline-section { display: none; }
    .page-content { justify-content: center; padding: 32px 20px; }
    .page-register .page-content,
    .page-forgot-password .page-content { justify-content: center; padding: 20px 16px; }
    .login-form-wrap { width: 100%; max-width: 420px; }
    .page-register .login-form-wrap,
    .page-forgot-password .login-form-wrap { width: 100%; max-width: 420px; max-height: none; }
}
@media (max-width: 600px) {
    .overlay-nav { padding: 0 20px; height: 60px; }
    .page-register .overlay-nav,
    .page-forgot-password .overlay-nav { padding: 16px 20px; height: auto; }
    .header-brand img:not(.logo-img-small) { height: 30px; }
    .header-brand { gap: 8px; }
    .header-brand-sub { display: none; }
    .header-brand-name { font-size: 16px; }
    .lang-btn { padding: 6px 10px; font-size: 12px; }
    .lang-btn .lang-label { display: none; }
}
@media (max-width: 480px) {
    .login-form-wrap { padding: 30px 20px 24px; border-radius: 16px; }
    .page-register .login-form-wrap,
    .page-forgot-password .login-form-wrap { padding: 28px 18px 22px; border-radius: 16px; }
    .overlay-nav { padding: 0 16px; height: 56px; }
    .page-register .overlay-nav,
    .page-forgot-password .overlay-nav { padding: 16px 20px; height: auto; }
    .header-brand-name { font-size: 15px; }
    .lang-btn { padding: 5px 8px; }
}
@media (max-width: 380px) {
    .overlay-nav { padding: 0 12px; height: 52px; }
    .page-register .overlay-nav,
    .page-forgot-password .overlay-nav { padding: 12px 16px; height: auto; }
    .header-brand img:not(.logo-img-small) { height: 28px; }
    .header-brand-name { font-size: 14px; }
}