:root {
    --bg-primary: #0a0e27;
    --bg-card: #111640;
    --bg-input: #1a1f4a;
    --border: #2a2f5a;
    --text-primary: #e8e9f0;
    --text-secondary: #8b8faa;
    --accent: #c9a24e;
    --accent-hover: #dbb85a;
    --accent-dark: #8b6914;
    --danger: #e05555;
    --success: #4caf84;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
}

body {
    background: linear-gradient(135deg, #0a0e27 0%, #0f1335 30%, #0a1030 60%, #0d1128 100%);
    background-attachment: fixed;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(201,162,78,0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 60%, rgba(201,162,78,0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* 居中容器 */
.center-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    height: 100dvh;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* 表单卡片 */
.form-card {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.card-header {
    text-align: center;
    margin-bottom: 28px;
}

.card-header h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.card-header p {
    font-size: 13px;
    color: var(--text-secondary);
}

.license-warn {
    margin-top: 12px;
    padding: 8px 16px;
    background: rgba(224,85,85,0.15);
    border: 1px solid rgba(224,85,85,0.3);
    border-radius: var(--radius-sm);
    color: var(--danger);
    font-size: 12px;
}

/* 输入框组 */
.input-group {
    margin-bottom: 18px;
}

.input-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 12px;
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 1;
}

.input-wrapper input {
    width: 100%;
    padding: 12px 14px 12px 40px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: all 0.2s;
    letter-spacing: 1px;
}

.input-wrapper input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201,162,78,0.1);
}

.input-wrapper input::placeholder {
    color: rgba(139,143,170,0.5);
    font-size: 13px;
    letter-spacing: 0;
}

.toggle-pwd {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.toggle-pwd:hover { color: var(--accent); }
.toggle-pwd svg { width: 18px; height: 18px; }

/* 验证码 */
.captcha-row {
    display: flex;
    gap: 10px;
}

.captcha-row input {
    flex: 1;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    letter-spacing: 3px;
    outline: none;
    max-width: 140px;
}

.captcha-row input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201,162,78,0.1);
}

.captcha-img {
    height: 44px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid var(--border);
    flex-shrink: 0;
    background: #e8ecf2;
    transition: transform 0.15s;
}

.captcha-img:active { transform: scale(0.95); }

/* 按钮 */
.btn-primary {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 4px;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 6px;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(201,162,78,0.3);
}

.btn-primary:active { transform: scale(0.98); }

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 底部链接 */
.card-footer {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}

.card-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
    letter-spacing: 1px;
}

.card-footer a:hover { color: var(--accent); }

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    letter-spacing: 1px;
    max-width: 90vw;
    text-align: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.error {
    background: rgba(224,85,85,0.95);
    color: #fff;
    box-shadow: 0 4px 16px rgba(224,85,85,0.4);
}

.toast.success {
    background: rgba(76,175,132,0.95);
    color: #fff;
    box-shadow: 0 4px 16px rgba(76,175,132,0.4);
}

/* 加载动画 */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn-loading {
    pointer-events: none;
    position: relative;
}

.btn-loading::after {
    content: '';
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
}

/* 竖屏适配 */
@media (max-width: 480px) {
    .center-container { padding: 12px; }
    .form-card { padding: 24px 18px; }
    .card-header h2 { font-size: 20px; }
}