/* ============ 模态框遮罩 ============ */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ============ 模态卡片 ============ */
.modal-card {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 16px;
    background: linear-gradient(145deg, rgba(17, 17, 17, 0.95), rgba(10, 10, 15, 0.98));
    border: 1px solid rgba(106, 92, 255, 0.15);
    border-radius: 16px;
    padding: 36px 32px 28px;
    box-shadow:
        0 0 60px rgba(106, 92, 255, 0.08),
        0 8px 32px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============ 头部 ============ */
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.modal-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #a78bfa, #6a5cff, #00d4ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.6);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.modal-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
}

/* ============ 表单组 ============ */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.02em;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #fff;
    font-size: 14px;
    font-family: "Segoe UI", sans-serif;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
    box-sizing: border-box;
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.25);
}

.form-input:focus {
    border-color: rgba(106, 92, 255, 0.5);
    box-shadow:
        0 0 0 3px rgba(106, 92, 255, 0.1),
        0 0 16px rgba(0, 212, 255, 0.06);
    background: rgba(255, 255, 255, 0.07);
}

.form-input.error {
    border-color: rgba(255, 77, 77, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 77, 77, 0.08);
}

.form-error {
    display: none;
    margin-top: 5px;
    font-size: 12px;
    color: #ff4d4d;
    line-height: 1.4;
}

.form-error.visible {
    display: block;
}

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

.code-row .form-input {
    flex: 1;
}

.btn-send-code {
    flex-shrink: 0;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid rgba(106, 92, 255, 0.3);
    background: rgba(106, 92, 255, 0.1);
    color: #a78bfa;
    font-size: 13px;
    font-family: "Segoe UI", sans-serif;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.btn-send-code:hover:not(:disabled) {
    background: rgba(106, 92, 255, 0.2);
    border-color: rgba(106, 92, 255, 0.5);
    color: #c4b5fd;
}

.btn-send-code:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.3);
}

/* ============ 提交按钮 ============ */
.btn-submit {
    width: 100%;
    padding: 13px;
    margin-top: 8px;
    border-radius: 10px;
    border: none;
    background: linear-gradient(45deg, #6a5cff, #00d4ff);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    font-family: "Segoe UI", sans-serif;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-submit:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 24px rgba(106, 92, 255, 0.35);
}

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

.btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ============ 底部切换 ============ */
.modal-footer {
    margin-top: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.forgot-password-link {
    background: none;
    border: none;
    color: rgba(167, 139, 250, 0.55);
    font-size: 13px;
    font-family: "Segoe UI", sans-serif;
    cursor: pointer;
    transition: color 0.2s;
}

.forgot-password-link:hover {
    color: #a78bfa;
}

.switch-link {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.45);
    font-size: 13px;
    font-family: "Segoe UI", sans-serif;
    cursor: pointer;
    transition: color 0.2s;
}

.switch-link span {
    background: linear-gradient(135deg, #a78bfa, #00d4ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.switch-link:hover {
    color: rgba(255, 255, 255, 0.7);
}

/* ============ 全局提示 ============ */
.form-message {
    display: none;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    text-align: center;
}

.form-message.visible {
    display: block;
}

.form-message.success {
    background: rgba(0, 200, 83, 0.12);
    border: 1px solid rgba(0, 200, 83, 0.25);
    color: #69f0ae;
}

.form-message.error {
    background: rgba(255, 77, 77, 0.12);
    border: 1px solid rgba(255, 77, 77, 0.25);
    color: #ff6e6e;
}

/* ============ 用户菜单（已登录） ============ */
#user-menu {
    display: none;
    align-items: center;
    gap: 10px;
}

#user-menu.visible {
    display: flex;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid rgba(106, 92, 255, 0.4);
    object-fit: cover;
}

.user-name {
    font-size: 14px;
    color: #ccc;
    font-weight: 500;
}

.btn-logout {
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: transparent;
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    font-family: "Segoe UI", sans-serif;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-logout:hover {
    color: #ff6e6e;
    border-color: rgba(255, 77, 77, 0.4);
    background: rgba(255, 77, 77, 0.08);
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .modal-card {
        margin: 12px;
        padding: 28px 20px 22px;
        max-width: 100%;
        border-radius: 12px;
    }

    .modal-header h2 {
        font-size: 20px;
    }

    .form-input {
        padding: 10px 12px;
        font-size: 13px;
    }

    .btn-send-code {
        padding: 10px 12px;
        font-size: 12px;
    }

    .btn-submit {
        padding: 11px;
        font-size: 14px;
    }
}